2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 2840
DTC Descriptors
DTC U1500 01
- Inter-Device Dedicated Bus 1 Short to Battery
DTC U1500 02
- Inter-Device Dedicated Bus 1 Short to Ground
DTC U1500 31
- Electronic Control Unit (ECU) Performance General Checksum Failure
DTC U1511 00
- Inter-device Dedicated Bus Lost Communication With Device 1
DTC U1512 00
- Inter-device Dedicated Bus Lost Communication With Device 2
Diagnostic Fault Information
Circuit/System Description
The driver door module (DDM) and the front passenger door module (FPDM) communicate with window regulator motors on the local
interconnect network bus 1 and the local interconnect network bus 2 circuits respectively. When the driver power window switch is activated to a
desired position, the DDM examines the request and checks for messages from other vehicle control modules prohibiting window movement. If no
prohibitive messages have been received, the DDM will send a LIN serial data message to the driver door window motor to move the window to
the desired position.
When the DDM receives a request to operate one of the right side passenger windows from the driver master control, a GMLAN serial data
message is sent to the PDM. The PDM examines the request and checks for messages from other vehicle control modules prohibiting the window
movement. If no prohibitive messages have been received, the PDM will send a LIN serial data message to the appropriate window motor to move
the window as requested.
The DDM and PDM supply their respective rear power window switches with a 12 V reference and signal circuit. The rear power window switches
contain separate resistors for each switch position. When a rear power window switch is activated, the associated door control module interprets the
signal and checks for messages from other vehicle control modules prohibiting the window movement. If no prohibitive messages have been
received, the door control module sends a LIN serial data message to the appropriate power window motor commanding the requested window
position.
The driver information center (DIC) displays the compass based on serial data message from the BCM. The compass module communicates with
the body control module (BCM) through a bi-directional data circuit (LIN).
Conditions for Running the DTC
The system voltage is between 9-16 V.
Conditions for Setting the DTC
U1500 01
When there is a short to voltage in the local interconnect network bus circuit.
U1500 02
When there is a short to ground in the local interconnect network bus circuit.
Showing posts with label DTC Descriptors. Show all posts
Showing posts with label DTC Descriptors. Show all posts
Tuesday, December 15, 2020
Tuesday, November 10, 2020
2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 2003
2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 2003
DTC Descriptors
DTC P0324
- Knock Sensor (KS) Module Performance
DTC P0325
- Knock Sensor (KS) Circuit Bank 1
DTC P0326
- Knock Sensor (KS) Performance
DTC P0327
- Knock Sensor (KS) Circuit Low Voltage Bank 1
DTC P0328
- Knock Sensor (KS) Circuit High Voltage Bank 1
DTC P0330
- Knock Sensor (KS) Circuit Bank 2
DTC P0332
- Knock Sensor (KS) Circuit Low Voltage Bank 2
DTC P0333
- Knock Sensor (KS) Circuit High Voltage Bank 2
Diagnostic Fault Information
Circuit/System Description
The knock sensor (KS) system enables the engine control module (ECM) to control the ignition timing for the best possible performance while
protecting the engine from potentially damaging levels of detonation. The ECM monitors 2 separate KS, one on each side of the engine block. Each
KS produces an AC voltage that varies, depending on the vibration levels detected during engine operation. The ECM receives the KS signal
through 2 isolated signal circuits for each KS. The ECM adjusts the spark timing based on the amplitude and frequency of each KS signal. The
ECM learns a minimum noise level for each sensor at idle speeds, and uses calibrated noise level values for the rest of the RPM range. The ECM
should monitor a normal KS signal within the noise channel.
Conditions for Running the DTC
P0324
* DTC P0325, P0326, P0327, P0328, P0330, P0332, or P0333 are not set.
* The engine speed is at least 400 RPM.
* DTC P0324 runs continuously when the above conditions are met.
P0325 or P0330
* DTC P0324, P0325, P0326, P0327, P0328, P0330, P0332, or P0333 are not set.
* The engine speed is at least 400 RPM.
* The engine coolant temperature (ECT) is warmer than -40掳C (-40掳F).
* The engine run time is at least 2 s.
* The power take-off (PTO) is not active.
* DTCs P0325 and P0330 run continuously when the above conditions are met.
P0326
* DTC P0068, P0606, P1516, P2101, P2135, or P2176 are not set.
* The engine speed is at least 400 RPM.
* The MAP is at least 10 kPa.
* DTC P0324 runs continuously when the above conditions are met.
P0327, P0328, P0332, and P0333
* The engine coolant temperature (ECT) is warmer than -40掳C (-40掳F).
* The engine run time is at least 2 s.
* DTCs P0327, P0328, P0332, and P0333 run continuously when the above conditions are met.
Conditions for Setting the DTC
DTC Descriptors
DTC P0324
- Knock Sensor (KS) Module Performance
DTC P0325
- Knock Sensor (KS) Circuit Bank 1
DTC P0326
- Knock Sensor (KS) Performance
DTC P0327
- Knock Sensor (KS) Circuit Low Voltage Bank 1
DTC P0328
- Knock Sensor (KS) Circuit High Voltage Bank 1
DTC P0330
- Knock Sensor (KS) Circuit Bank 2
DTC P0332
- Knock Sensor (KS) Circuit Low Voltage Bank 2
DTC P0333
- Knock Sensor (KS) Circuit High Voltage Bank 2
Diagnostic Fault Information
Circuit/System Description
The knock sensor (KS) system enables the engine control module (ECM) to control the ignition timing for the best possible performance while
protecting the engine from potentially damaging levels of detonation. The ECM monitors 2 separate KS, one on each side of the engine block. Each
KS produces an AC voltage that varies, depending on the vibration levels detected during engine operation. The ECM receives the KS signal
through 2 isolated signal circuits for each KS. The ECM adjusts the spark timing based on the amplitude and frequency of each KS signal. The
ECM learns a minimum noise level for each sensor at idle speeds, and uses calibrated noise level values for the rest of the RPM range. The ECM
should monitor a normal KS signal within the noise channel.
Conditions for Running the DTC
P0324
* DTC P0325, P0326, P0327, P0328, P0330, P0332, or P0333 are not set.
* The engine speed is at least 400 RPM.
* DTC P0324 runs continuously when the above conditions are met.
P0325 or P0330
* DTC P0324, P0325, P0326, P0327, P0328, P0330, P0332, or P0333 are not set.
* The engine speed is at least 400 RPM.
* The engine coolant temperature (ECT) is warmer than -40掳C (-40掳F).
* The engine run time is at least 2 s.
* The power take-off (PTO) is not active.
* DTCs P0325 and P0330 run continuously when the above conditions are met.
P0326
* DTC P0068, P0606, P1516, P2101, P2135, or P2176 are not set.
* The engine speed is at least 400 RPM.
* The MAP is at least 10 kPa.
* DTC P0324 runs continuously when the above conditions are met.
P0327, P0328, P0332, and P0333
* The engine coolant temperature (ECT) is warmer than -40掳C (-40掳F).
* The engine run time is at least 2 s.
* DTCs P0327, P0328, P0332, and P0333 run continuously when the above conditions are met.
Conditions for Setting the DTC
Tuesday, November 3, 2020
2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1834
2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1834
DTC Descriptors
DTC P0134
- HO2S Circuit Insufficient Activity Bank 1 Sensor 1
DTC P0140
- HO2S Circuit Insufficient Activity Bank 1 Sensor 2
DTC P0154
- HO2S Circuit Insufficient Activity Bank 2 Sensor 1
DTC P0160
- HO2S Circuit Insufficient Activity Bank 2 Sensor 2
Diagnostic Fault Information
Typical Scan Tool Data
Circuit/System Description
The heated oxygen sensors (HO2S) are used for fuel control and catalyst monitoring. Each HO2S compares the oxygen content of the surrounding
air with the oxygen content of the exhaust stream. When the engine is started, the control module operates in an Open Loop mode, ignoring the
HO2S signal voltage while calculating the air-to-fuel ratio. While the engine runs, the HO2S heats up and begins to generate a voltage within a
range of 0-1,275 mV. Once sufficient HO2S voltage fluctuation is observed by the control module, Closed Loop is entered. The control module
uses the HO2S voltage to determine the air-to-fuel ratio. An HO2S voltage that increases toward 1,000 mV indicates a rich fuel mixture. An HO2S
voltage that decreases toward 0 mV indicates a lean fuel mixture.
The heating elements inside each HO2S heat the sensor to bring the sensor up to operating conditions faster. This allows the system to enter Closed
Loop earlier and the control module to calculate the air-to-fuel ratio sooner.
Conditions for Running the DTC
* DTCs P0068, P0101, P0102, P0103, P0106, P0107, P0108, P0112, P0113, P0116, P0117, P0118, P0120, P0121, P0122, P0123, P0128,
P0201, P0202, P0203, P0204, P0205, P0206, P0207, P0208, P0220, P0222, P0223, P0442, P0443, P0446, P0449, P0455, P0496, P1516,
P2101, P2119, P2135, P2176 are not set.
* The ignition 1 voltage is between 10-32 V.
* The engine run time is greater than 300 s.
* The fuel system is in Closed Loop.
* The DTCs run continuously when the above conditions are met.
Conditions for Setting the DTC
DTC Descriptors
DTC P0134
- HO2S Circuit Insufficient Activity Bank 1 Sensor 1
DTC P0140
- HO2S Circuit Insufficient Activity Bank 1 Sensor 2
DTC P0154
- HO2S Circuit Insufficient Activity Bank 2 Sensor 1
DTC P0160
- HO2S Circuit Insufficient Activity Bank 2 Sensor 2
Diagnostic Fault Information
Typical Scan Tool Data
Circuit/System Description
The heated oxygen sensors (HO2S) are used for fuel control and catalyst monitoring. Each HO2S compares the oxygen content of the surrounding
air with the oxygen content of the exhaust stream. When the engine is started, the control module operates in an Open Loop mode, ignoring the
HO2S signal voltage while calculating the air-to-fuel ratio. While the engine runs, the HO2S heats up and begins to generate a voltage within a
range of 0-1,275 mV. Once sufficient HO2S voltage fluctuation is observed by the control module, Closed Loop is entered. The control module
uses the HO2S voltage to determine the air-to-fuel ratio. An HO2S voltage that increases toward 1,000 mV indicates a rich fuel mixture. An HO2S
voltage that decreases toward 0 mV indicates a lean fuel mixture.
The heating elements inside each HO2S heat the sensor to bring the sensor up to operating conditions faster. This allows the system to enter Closed
Loop earlier and the control module to calculate the air-to-fuel ratio sooner.
Conditions for Running the DTC
* DTCs P0068, P0101, P0102, P0103, P0106, P0107, P0108, P0112, P0113, P0116, P0117, P0118, P0120, P0121, P0122, P0123, P0128,
P0201, P0202, P0203, P0204, P0205, P0206, P0207, P0208, P0220, P0222, P0223, P0442, P0443, P0446, P0449, P0455, P0496, P1516,
P2101, P2119, P2135, P2176 are not set.
* The ignition 1 voltage is between 10-32 V.
* The engine run time is greater than 300 s.
* The fuel system is in Closed Loop.
* The DTCs run continuously when the above conditions are met.
Conditions for Setting the DTC
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2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1728
DTC Descriptors
DTC P0068
- Throttle Body Airflow Performance
DTC P0121
- Throttle Position (TP) Sensor 1 Performance
Circuit/System Description
The engine control module (ECM) uses the following information to calculate an expected airflow rate:
* The throttle position (TP)
* The barometric pressure (BARO)
* The manifold absolute pressure (MAP)
* The intake air temperature (IAT)
* The engine RPM
Conditions for Running the DTC
P0068
* DTCs P0641, P0651, P1516, P2101, P2119, P2176 are not set.
* The engine is running.
* DTC P0068 run continuously when the above conditions are met.
P0121
* DTCs P0102, P0103, P0107, P0108, P0112, P0113, P0116, P0117, P0118, P0128, P0315, P0335, P0336 are not set.
* The engine speed is more than 450 RPM.
* DTC P0121 run continuously when the above conditions are met.
Conditions for Setting the DTC
P0068
The ECM detects that the throttle position and the indicated engine load do not correspond with the expected load and throttle position for less than
1 second.
P0121
The predicted air flow and the predicted MAP combined are outside a calibrated range for more than 3 seconds.
Action Taken When the DTC Sets
P0068
* DTC P0068 is a Type A DTC.
* The control module commands the throttle actuator control (TAC) system to operate in the Reduced Engine Power mode.
* A message center or an indicator displays Reduced Engine Power.
* Under certain conditions the control module commands the engine OFF.
P0121
DTC P0121 is a Type B DTC.
Conditions for Clearing the MIL/DTC
* DTC P0068 is a Type A DTC.
* DTC P0121 is a Type B DTC.
Reference Information
Schematic Reference
Engine Controls Schematics (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views)
Electrical Information Reference
* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit
Testing/Circuit Testing)
DTC Descriptors
DTC P0068
- Throttle Body Airflow Performance
DTC P0121
- Throttle Position (TP) Sensor 1 Performance
Circuit/System Description
The engine control module (ECM) uses the following information to calculate an expected airflow rate:
* The throttle position (TP)
* The barometric pressure (BARO)
* The manifold absolute pressure (MAP)
* The intake air temperature (IAT)
* The engine RPM
Conditions for Running the DTC
P0068
* DTCs P0641, P0651, P1516, P2101, P2119, P2176 are not set.
* The engine is running.
* DTC P0068 run continuously when the above conditions are met.
P0121
* DTCs P0102, P0103, P0107, P0108, P0112, P0113, P0116, P0117, P0118, P0128, P0315, P0335, P0336 are not set.
* The engine speed is more than 450 RPM.
* DTC P0121 run continuously when the above conditions are met.
Conditions for Setting the DTC
P0068
The ECM detects that the throttle position and the indicated engine load do not correspond with the expected load and throttle position for less than
1 second.
P0121
The predicted air flow and the predicted MAP combined are outside a calibrated range for more than 3 seconds.
Action Taken When the DTC Sets
P0068
* DTC P0068 is a Type A DTC.
* The control module commands the throttle actuator control (TAC) system to operate in the Reduced Engine Power mode.
* A message center or an indicator displays Reduced Engine Power.
* Under certain conditions the control module commands the engine OFF.
P0121
DTC P0121 is a Type B DTC.
Conditions for Clearing the MIL/DTC
* DTC P0068 is a Type A DTC.
* DTC P0121 is a Type B DTC.
Reference Information
Schematic Reference
Engine Controls Schematics (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views)
Electrical Information Reference
* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit
Testing/Circuit Testing)
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2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1592
DTC Descriptors
DTC P1AE2
- Battery Energy Control Module High Voltage System Interlock Circuit
DTC P1AE3
- Battery Energy Control Module High Voltage System Interlock Circuit Low Voltage
DTC P1AE4
- Battery Energy Control Module High Voltage System Interlock Circuit High Voltage
DTC P1B05
- Drive Motor 1 Control Module High Voltage System Interlock Circuit
DTC P1B06
- Drive Motor 2 Control Module High Voltage System Interlock Circuit
Diagnostic Fault Information
Typical Scan Tool Data
Circuit/System Description
DTC Descriptors
DTC P1AE2
- Battery Energy Control Module High Voltage System Interlock Circuit
DTC P1AE3
- Battery Energy Control Module High Voltage System Interlock Circuit Low Voltage
DTC P1AE4
- Battery Energy Control Module High Voltage System Interlock Circuit High Voltage
DTC P1B05
- Drive Motor 1 Control Module High Voltage System Interlock Circuit
DTC P1B06
- Drive Motor 2 Control Module High Voltage System Interlock Circuit
Diagnostic Fault Information
Typical Scan Tool Data
Circuit/System Description
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2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1747
2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1747
DTC Descriptors
DTC P0976
- Shift Solenoid (SS) 2 Control Circuit Low Voltage
DTC P0977
- Shift Solenoid (SS) 2 Control Circuit High Voltage
Diagnostic Fault Information
Circuit/System Description
The shift solenoid (SS) 2 is part of the control solenoid valve assembly which has no serviceable components. SS 2 is a normally closed (NC)
ON/OFF solenoid and is controlled by the TCM through a low side driver. When the SS 2 is energized (ON), SS 2 fluid pressure is directed to the
clutch select valve 3, which allows the valve to overcome the spring pressure and move to the applied position. Power to the SS 2 is supplied by the
TCM through a high side driver (HSD). The HSD protects the circuit and components from excessive current flow. If excessive current flow is
detected, the HSD will turn OFF. When the fault is corrected, the HSD will reset.
Conditions for Running the DTC
P0976
* The engine speed is greater than 400 RPM for 5 seconds.
* The ignition voltage is 8.6 volts or greater.
* DTC P0976 has not set this ignition cycle.
P0977
* The engine speed is greater than 400 RPM for 5 seconds.
* The ignition voltage is 8.6 volts or greater.
* DTC P0977 has not set this ignition cycle.
Conditions for Setting the DTC
P0976
The TCM detects a short to ground on the SS 2 control circuit for 2 seconds.
P0977
The TCM detects an open or short to power on the SS 2 control circuit for 2 seconds.
Action Taken When the DTC Sets
P0976
* DTC P0976 is a Type B DTC.
* The TCM freezes transmission adaptive functions.
* The TCM commands maximum line pressure.
P0977
* DTC P0977 is a Type A DTC.
* The TCM limits the transmission to reverse and 5th gear.
* The TCM inhibits the torque converter clutch (TCC).
* The TCM commands maximum line pressure.
* The TCM freezes transmission adaptive functions.
* The TCM turns the high side driver OFF.
* The TCM inhibits Tap Up/Down function.
* The TCM inhibits manual shifting of forward gears.
Conditions for Clearing the DIC/DTC
* DTC P0976 is a Type B DTC.
* DTC P0977 is a Type A DTC.
Reference Information
Connector End View Reference
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2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1589
DTC Descriptors
DTC P0722
- Output Speed Sensor (OSS) Circuit Low Voltage
DTC P0723
- Output Speed Sensor (OSS) Intermittent
Diagnostic Fault Information
Typical Scan Tool Data
Circuit/System Description
The output speed sensor (OSS) is a hall-effect type sensor. The sensor faces the front differential transfer drive gear. The sensor receives 8.3-9.3
volts on the OSS supply voltage circuit from the transmission control module (TCM). As the output shaft rotates, the sensor produces a signal
frequency based on the machined surface of the output shaft. This signal is transmitted through the OSS signal circuit to the TCM. The TCM uses
the OSS signal to determine line pressure, transmission shift patterns, torque converter clutch (TCC) slip speed and gear ratio.
Conditions for Running the DTC
P0722
* No DTCs P0101, P0102, P0103, P0121, P0122, P0123, P0716, P0717, or P0723.
* The selected range is not PARK or NEUTRAL.
* The transmission input speed is between 1,000-6,500 RPM.
* The engine speed is between 3,200-5,000 RPM.
* The calc. throttle position is greater than 5 percent.
* The throttle position signal is valid.
* The engine torque is greater than 35 Nm (26 lb ft).
* The engine torque signal is valid.
* The TFT is greater than -40掳C (-40掳F).
* The engine speed is greater than 400 RPM for 5 seconds.
* The ignition voltage is 8.6 volts or greater.
P0723
* No DTCs P0101, P0102, P0103, P0121, P0122, P0123, P0723, P0973, P0974, P0976, P0977.
* Greater than 5 seconds since last range change.
* The engine speed is greater than 400 RPM for 5 seconds.
* The ignition voltage is greater than 8.6 volts.
Conditions for Setting the DTC
P0722
The transmission output speed is 70 RPM or less for 4.5 seconds.
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2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1876
DTC Descriptors
DTC P0351
- Ignition Coil 1 Control Circuit
DTC P0352
- Ignition Coil 2 Control Circuit
DTC P0353
- Ignition Coil 3 Control Circuit
DTC P0354
- Ignition Coil 4 Control Circuit
DTC P0355
- Ignition Coil 5 Control Circuit
DTC P0356
- Ignition Coil 6 Control Circuit
DTC P2300
- Ignition Coil 1 Control Circuit Low Voltage
DTC P2301
- Ignition Coil 1 Control Circuit High Voltage
DTC P2303
- Ignition Coil 2 Control Circuit Low Voltage
DTC P2304
- Ignition Coil 2 Control Circuit High Voltage
DTC P2306
- Ignition Coil 3 Control Circuit Low Voltage
DTC P2307
- Ignition Coil 3 Control Circuit High Voltage
DTC P2309
- Ignition Coil 4 Control Circuit Low Voltage
DTC P2310
- Ignition Coil 4 Control Circuit High Voltage
DTC P2312
- Ignition Coil 5 Control Circuit Low Voltage
DTC P2313
- Ignition Coil 5 Control Circuit High Voltage
DTC P2315
- Ignition Coil 6 Control Circuit Low Voltage
DTC P2316
- Ignition Coil 6 Control Circuit High Voltage
Diagnostic Fault Information
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2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1553
DTC Descriptors
DTC P0641
- 5 V Reference 1 Circuit
DTC P0642
- 5 V Reference 1 Circuit Low Voltage
DTC P0643
- 5 V Reference 1 Circuit High Voltage
DTC P0651
- 5 V Reference 2 Circuit
DTC P0652
- 5 V Reference 2 Circuit Low Voltage
DTC P0653
- 5 V Reference 2 Circuit High Voltage
DTC P0697
- 5 V Reference 3 Circuit
DTC P0698
- 5 V Reference 3 Circuit Low Voltage
DTC P0699
- 5 V Reference 3 Circuit High Voltage
Circuit/System Description
The engine control module (ECM) has 3 internal 5 V reference circuits. Each internal reference circuit provides external 5 V reference circuits for
more than one sensor. A short to ground or short to voltage on one external 5 V reference circuit can affect all the components connected to the
same internal 5 V reference circuit.
Conditions for Running the DTC
* The ignition is ON for greater than 3 s.
* DTCs P0641, P0642, P0643, P0651, P0652, P0653, P0697, P0698, and P0699 run continuously when the above condition is met.
Conditions for Setting the DTC
The 5 V reference circuit voltage is above or below a predetermined threshold for greater than 1 s or for a cumulative of 10 s.
Action Taken When the DTC Sets
DTCs P0641, P0642, P0643, P0651, P0652, P0653, P0697, P0698, and P0699 are Type A DTCs.
Conditions for Clearing the DTC
DTCs P0641, P0642, P0643, P0651, P0652, P0653, P0697, P0698, and P0699 are Type A DTCs.
Diagnostic Aids
The 5 V reference 1, 2, and 3 circuits provide 5 V to the following sensors:
P0641, P0642, and P0643
* Economy mode switch
* Turbocharger pressure sensor
* Secondary air injection (AIR) pressure sensor
* Engine oil pressure (EOP) sensor
* Fuel tank pressure sensor
P0651, P0652, and P0653
* All four camshaft position sensors
* Accelerator pedal position (APP) sensor 1
P0697, P0698, and P0699
* Throttle position sensor 1 and 2
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DTC Descriptors
DTC P0111
- Intake Air Temperature (IAT) Sensor Circuit Performance
DTC P0112
- Intake Air Temperature (IAT) Sensor Circuit Low Voltage
DTC P0113
- Intake Air Temperature (IAT) Sensor Circuit High Voltage
DTC P0114
- Intake Air Temperature (IAT) Sensor Intermittent
Diagnostic Fault Information
Typical Scan Tool Data
Circuit Description
The intake air temperature (IAT) sensor is an integral part of the Intake Manifold Pressure and Air Temperature sensor. The IAT sensor is a
variable resistor that measures the temperature of the intake air. The engine control module (ECM) supplies 5 V to the IAT signal circuit and
supplies a ground to the low reference circuit.
The following table illustrates the difference between temperature, resistance, and voltage:
Conditions for Running the DTC
P0111 Idle Test
* Before the ECM can report DTC P0111 failed, DTC P0101 must run and pass.
* DTC P0112, P0113, P0116, P0117, P0118, P0119, P0125, or P0128 is not set.
* The engine coolant temperature (ECT) at engine start is colder than 120掳C (248掳F).
* The ECT is warmer than 60掳C (140掳F).
* The vehicle speed is less than 3 km/h (2 mph).
* DTC P0111 runs continuously when the above conditions are met for greater than 2 s.
P0111 Cruise Test
* Before the ECM can report DTC P0111 failed, DTC P0101 must run and pass.
* DTC P0112, P0113, P0116, P0117, P0118, P0119, or P0128 is not set.
* The ECT at engine start is colder than 120掳C (248掳F).
* The ECT is warmer than 75掳C (167掳F).
* The vehicle speed is greater than 40 km/h (25 mph).
* The MAF is between 15.6 and 250 g/s.
* Decel fuel cut-off is not active.
* DTC P0111 runs continuously when the above conditions are met for greater than 2 s.
P0111 Rationality Test
* The ECT at engine start is warmer than 35掳C (95掳F).
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2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1857
DTC Descriptors
DTC P2227
- Barometric Pressure (BARO) Sensor Performance
DTC P2228
- Barometric Pressure (BARO) Sensor Circuit Low Voltage
DTC P2229
- Barometric Pressure (BARO) Sensor Circuit High Voltage
Circuit/System Description
The barometric pressure (BARO) sensor responds to changes in altitude and atmospheric conditions. This gives the engine control module (ECM)
an indication of barometric pressure. The ECM uses this information to calculate fuel delivery. The BARO sensor is located within the controller
and is not serviced as a separate unit. The BARO sensor provides a voltage signal to the ECM relative to the atmospheric pressure changes. The
ECM monitors the BARO sensor signal for a voltage outside of the normal range.
Conditions for Running the DTC
P2227
* Before the ECM can report DTC P2227 failed, DTCs P0100, P0101, P0102, P0103, P0111, P0112, P0113, P0114, P0121, P0122, P0123,
P0221, P0222, P0223, P0236, P0237, P0238, P2228, and P2229 must run and pass.
* The engine is operating.
* The engine speed is less than 1,120 RPM.
* The throttle position sensor parameter is less than 10 %.
* DTC P2227 runs whenever the above conditions are met.
P2228 or P2229
* The ignition is ON.
* The DTCs run continuously when the above condition is met for 0.2 s.
Conditions for Setting the DTC
P2227
* The ECM detects that the BARO sensor signal plus a calibrated threshold is less than the boost pressure sensor signal plus a calibrated
threshold for more than 9 s.
OR
* The ECM detects that the BARO sensor signal plus a calibrated threshold greater than the boost pressure sensor signal plus a calibrated
threshold for more than 9 s.
OR
* The ECM detects that the BARO pressure changed greater than 5 kPa (0.7 psi) within 20 s.
OR
* The ECM detects that the BARO pressure changed greater than 10 kPa (1.5 psi) since the last ignition cycle.
P2228
* The ECM detects that the BARO sensor voltage is less than 0.20 V for 0.5 s.
OR
* The ECM detects that the BARO sensor signal is less than 45 kPa (6.5 psi) for 2 s
P2229
* The ECM detects that the BARO sensor voltage is greater than 4.8 V for 0.5 s.
OR
* The ECM detects that the BARO sensor signal is greater than 115 kPa (16.7 psi) for 2 s.
Action Taken When the DTC Sets
DTCs P2227, P2228, and P2229 are Type B DTCs.
Conditions for Clearing the MIL/DTC
DTCs P2227, P2228, and P2229 are Type B DTCs.
Reference Information
Schematic Reference
Engine Controls Schematics (LAU) (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)Engine Controls Schematics
(LF1) (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)
Connector End View Reference
Thursday, December 19, 2019
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2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 979
DTC Descriptors
DTC C056D 00
- ECU Hardware Performance
DTC C056D 3C
- ECU Hardware Performance Internal Communications Failure
DTC C056D 59
- ECU Hardware Performance
DTC C120C
- Brake Pedal Position Sensor 4 Plausibility
DTC C121C
- EBCM Internal Communication Error
DTC C121E
- EBCM Unimplemented Interrupt
DTC C121F
- EBCM Unexpected Exception
DTC C123A
- EBCM High End Timer Watchdog
DTC C123B
- EBCM High End Timer Program Overflow
DTC C123C
- EBCM High End Timer RAM Fault
DTC C123D
- EBCM Solenoid Timeout
DTC C123E
- EBCM High End Timer Periodic Interrupt
DTC C123F
- EBCM Serial Peripheral Interface Inoperative
DTC C1255
- Electronic Control Unit Performance
DTC C1256
- Program ROM Checksum Error
DTC C126E
- EBCM Stack Overrun
DTC C126F
- EBCM Serial Peripheral Interface Performance
DTC C127C
- EBCM Self Test Failed
DTC C127E
- EBCM Module High Temperature
DTC C12A7
- ABS Boost Valve Solenoid Circuit Performance
DTC C12C2
- ABS Left Front Isolation Solenoid Valve Driver Shorted
DTC C12C5
- ABS Right Front Isolation Solenoid Valve Diver Shorted
DTC Descriptors
DTC C056D 00
- ECU Hardware Performance
DTC C056D 3C
- ECU Hardware Performance Internal Communications Failure
DTC C056D 59
- ECU Hardware Performance
DTC C120C
- Brake Pedal Position Sensor 4 Plausibility
DTC C121C
- EBCM Internal Communication Error
DTC C121E
- EBCM Unimplemented Interrupt
DTC C121F
- EBCM Unexpected Exception
DTC C123A
- EBCM High End Timer Watchdog
DTC C123B
- EBCM High End Timer Program Overflow
DTC C123C
- EBCM High End Timer RAM Fault
DTC C123D
- EBCM Solenoid Timeout
DTC C123E
- EBCM High End Timer Periodic Interrupt
DTC C123F
- EBCM Serial Peripheral Interface Inoperative
DTC C1255
- Electronic Control Unit Performance
DTC C1256
- Program ROM Checksum Error
DTC C126E
- EBCM Stack Overrun
DTC C126F
- EBCM Serial Peripheral Interface Performance
DTC C127C
- EBCM Self Test Failed
DTC C127E
- EBCM Module High Temperature
DTC C12A7
- ABS Boost Valve Solenoid Circuit Performance
DTC C12C2
- ABS Left Front Isolation Solenoid Valve Driver Shorted
DTC C12C5
- ABS Right Front Isolation Solenoid Valve Diver Shorted
Sunday, December 15, 2019
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2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 894
DTC Descriptors
DTC C012E 00
- Hydraulic Brake Boost Pressure Loss
DTC C12FE 00
- ABS Pump Pressure Loss
Circuit/System Description
The electronic brake control module (EBCM) uses input from the boost pressure sensor for more accurate control during brake and vehicle stability
enhancement system event. The boost pressure sensor is internal to the brake pressure modulator valve. The boost control function will keep
operating amongst conditions that cause the boost pressure to be limited to less than commanded. The boost control continues to apply until the
boost pressure available is no greater than the master cylinder pressure the driver is applying.
Conditions for Running the DTC
* Engine Running
* Ignition voltage is greater than 10 volts.
* Transmission in Park
* Brake pedal was applied.
Conditions for Setting the DTC
* Boost pressure command greater than boost pressure +1500 kPa (217 psi) for 250 ms.
* Master cylinder pressure greater than boost pressure -200 kPa (29 psi) for 250 ms.
* Accumulator pressure greater than 16,000 kPa (2320 psi) for 250 ms.
* DTCs C12BC, C12BD, C12BE, C128A, C128D, C127D, C12E4, C1255, C1256, C126E, C123C, or C127C not set.
Action Taken When the DTC Sets
* The EBCM disables the ABS, traction control system and the vehicle stability enhancement system for the duration of the ignition cycle.
* A driver information center message and/or a warning indicator may be displayed.
Conditions for Clearing the DTC
* The condition for setting the DTC is no longer present.
* The EBCM clears the history DTC when a current DTC is not detected in 40 consecutive drive cycles.
Diagnostic Aids
* Excessive brake pedal applies (10 or more applies in 30 seconds) can cause the DTC to set.
* The DTC can set if the ignition key is in the Accessory position, the brake pedal is applied and then the ignition key is turned ON.
Reference Information
Schematic Reference
Antilock Brake System Schematics (See: Brakes and Traction Control/Antilock Brakes / Traction Control Systems/Diagrams/Electrical Diagrams)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views)
Description and Operation
ABS Description and Operation (See: Brakes and Traction Control/Antilock Brakes / Traction Control Systems/Description and Operation/ABS
Description and Operation)
Electrical Information Reference
* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit
Testing/Circuit Testing)
* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic
Procedures/Connector Repairs/Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General
Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring
Repairs/Wiring Repairs)
Scan Tool Reference
Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information
DTC Descriptors
DTC C012E 00
- Hydraulic Brake Boost Pressure Loss
DTC C12FE 00
- ABS Pump Pressure Loss
Circuit/System Description
The electronic brake control module (EBCM) uses input from the boost pressure sensor for more accurate control during brake and vehicle stability
enhancement system event. The boost pressure sensor is internal to the brake pressure modulator valve. The boost control function will keep
operating amongst conditions that cause the boost pressure to be limited to less than commanded. The boost control continues to apply until the
boost pressure available is no greater than the master cylinder pressure the driver is applying.
Conditions for Running the DTC
* Engine Running
* Ignition voltage is greater than 10 volts.
* Transmission in Park
* Brake pedal was applied.
Conditions for Setting the DTC
* Boost pressure command greater than boost pressure +1500 kPa (217 psi) for 250 ms.
* Master cylinder pressure greater than boost pressure -200 kPa (29 psi) for 250 ms.
* Accumulator pressure greater than 16,000 kPa (2320 psi) for 250 ms.
* DTCs C12BC, C12BD, C12BE, C128A, C128D, C127D, C12E4, C1255, C1256, C126E, C123C, or C127C not set.
Action Taken When the DTC Sets
* The EBCM disables the ABS, traction control system and the vehicle stability enhancement system for the duration of the ignition cycle.
* A driver information center message and/or a warning indicator may be displayed.
Conditions for Clearing the DTC
* The condition for setting the DTC is no longer present.
* The EBCM clears the history DTC when a current DTC is not detected in 40 consecutive drive cycles.
Diagnostic Aids
* Excessive brake pedal applies (10 or more applies in 30 seconds) can cause the DTC to set.
* The DTC can set if the ignition key is in the Accessory position, the brake pedal is applied and then the ignition key is turned ON.
Reference Information
Schematic Reference
Antilock Brake System Schematics (See: Brakes and Traction Control/Antilock Brakes / Traction Control Systems/Diagrams/Electrical Diagrams)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views)
Description and Operation
ABS Description and Operation (See: Brakes and Traction Control/Antilock Brakes / Traction Control Systems/Description and Operation/ABS
Description and Operation)
Electrical Information Reference
* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit
Testing/Circuit Testing)
* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic
Procedures/Connector Repairs/Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General
Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring
Repairs/Wiring Repairs)
Scan Tool Reference
Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information
Thursday, December 12, 2019
2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 836
2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 836
DTC Descriptors
DTC C056D 00
- ECU Hardware Performance
DTC C056D 3C
- ECU Hardware Performance Internal Communications Failure
DTC C056D 59
- ECU Hardware Performance
DTC C120C
- Brake Pedal Position Sensor 4 Plausibility
DTC C121C
- EBCM Internal Communication Error
DTC C121E
- EBCM Unimplemented Interrupt
DTC C121F
- EBCM Unexpected Exception
DTC C123A
- EBCM High End Timer Watchdog
DTC C123B
- EBCM High End Timer Program Overflow
DTC C123C
- EBCM High End Timer RAM Fault
DTC C123D
- EBCM Solenoid Timeout
DTC C123E
- EBCM High End Timer Periodic Interrupt
DTC C123F
- EBCM Serial Peripheral Interface Inoperative
DTC C1255
- Electronic Control Unit Performance
DTC C1256
- Program ROM Checksum Error
DTC C126E
- EBCM Stack Overrun
DTC C126F
- EBCM Serial Peripheral Interface Performance
DTC C127C
- EBCM Self Test Failed
DTC C127E
- EBCM Module High Temperature
DTC C12A7
- ABS Boost Valve Solenoid Circuit Performance
DTC C12C2
- ABS Left Front Isolation Solenoid Valve Driver Shorted
DTC C12C5
- ABS Right Front Isolation Solenoid Valve Diver Shorted
DTC Descriptors
DTC C056D 00
- ECU Hardware Performance
DTC C056D 3C
- ECU Hardware Performance Internal Communications Failure
DTC C056D 59
- ECU Hardware Performance
DTC C120C
- Brake Pedal Position Sensor 4 Plausibility
DTC C121C
- EBCM Internal Communication Error
DTC C121E
- EBCM Unimplemented Interrupt
DTC C121F
- EBCM Unexpected Exception
DTC C123A
- EBCM High End Timer Watchdog
DTC C123B
- EBCM High End Timer Program Overflow
DTC C123C
- EBCM High End Timer RAM Fault
DTC C123D
- EBCM Solenoid Timeout
DTC C123E
- EBCM High End Timer Periodic Interrupt
DTC C123F
- EBCM Serial Peripheral Interface Inoperative
DTC C1255
- Electronic Control Unit Performance
DTC C1256
- Program ROM Checksum Error
DTC C126E
- EBCM Stack Overrun
DTC C126F
- EBCM Serial Peripheral Interface Performance
DTC C127C
- EBCM Self Test Failed
DTC C127E
- EBCM Module High Temperature
DTC C12A7
- ABS Boost Valve Solenoid Circuit Performance
DTC C12C2
- ABS Left Front Isolation Solenoid Valve Driver Shorted
DTC C12C5
- ABS Right Front Isolation Solenoid Valve Diver Shorted
Saturday, December 7, 2019
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2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 728
DTC Descriptors
DTC B3821 00
- Left Rear Window Relay Power Circuit
DTC B3824 00
- Right Rear Window Relay Power Circuit
Diagnostic Fault Information
Circuit/System Description
The body control module (BCM) monitors the window lockout command from the driver door switch (DDS). When the rear window switch
operation is authorized, the the BCM signal voltage drops approximately 5 volts to the rear window switches allowing for normal window
operation from the rear switches. If the rear window lockout function is commanded, the BCM signal voltage is at B+ voltage which disables the
rear window switches and the rear windows will only operate when the BCM receives a command from the driver master control.
Conditions for Running the DTC
* Battery voltage is between 9-16 volts.
* The ignition is ON.
Conditions for Setting the DTC
B3821 00
The BCM detects a fault in the left rear window lockout circuit.
B3824 00
The BCM detects a fault in the right rear window lockout circuit.
Action Taken When the DTC Sets
The left or right rear power window will be inoperative.
Conditions for Clearing the DTC
DTC Descriptors
DTC B3821 00
- Left Rear Window Relay Power Circuit
DTC B3824 00
- Right Rear Window Relay Power Circuit
Diagnostic Fault Information
Circuit/System Description
The body control module (BCM) monitors the window lockout command from the driver door switch (DDS). When the rear window switch
operation is authorized, the the BCM signal voltage drops approximately 5 volts to the rear window switches allowing for normal window
operation from the rear switches. If the rear window lockout function is commanded, the BCM signal voltage is at B+ voltage which disables the
rear window switches and the rear windows will only operate when the BCM receives a command from the driver master control.
Conditions for Running the DTC
* Battery voltage is between 9-16 volts.
* The ignition is ON.
Conditions for Setting the DTC
B3821 00
The BCM detects a fault in the left rear window lockout circuit.
B3824 00
The BCM detects a fault in the right rear window lockout circuit.
Action Taken When the DTC Sets
The left or right rear power window will be inoperative.
Conditions for Clearing the DTC
Thursday, December 5, 2019
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2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 682
DTC Descriptors
DTC B3205 00
- Window Inactive Over Current Fault
DTC B3205 0B
- Window Motor Fast Over Current Fault
Diagnostic Fault Information
Circuit/System Description
The driver door switch (DDS) and passenger door switch (PDS) control the power window functions through the power window motor up and
down control circuits. The door switches monitor the control circuits for fault conditions when up or down operation is requested prior to activating
the function and during operation.
Conditions for Running the DTC
* Battery voltage must be between 9-16 volts.
* The ignition is ON.
Conditions for Setting the DTC
B3205 00
The DDS or PDS detects a short to ground or short to voltage on their respective window motor control circuit.
B3205 0B
The DDS or PDS has detected excessive current flow on their respective window motor control circuit.
Action Taken When the DTC Sets
The affected power window will be inoperative.
Conditions for Clearing the DTC
* The DTC will be current for as long as the fault is present.
DTC Descriptors
DTC B3205 00
- Window Inactive Over Current Fault
DTC B3205 0B
- Window Motor Fast Over Current Fault
Diagnostic Fault Information
Circuit/System Description
The driver door switch (DDS) and passenger door switch (PDS) control the power window functions through the power window motor up and
down control circuits. The door switches monitor the control circuits for fault conditions when up or down operation is requested prior to activating
the function and during operation.
Conditions for Running the DTC
* Battery voltage must be between 9-16 volts.
* The ignition is ON.
Conditions for Setting the DTC
B3205 00
The DDS or PDS detects a short to ground or short to voltage on their respective window motor control circuit.
B3205 0B
The DDS or PDS has detected excessive current flow on their respective window motor control circuit.
Action Taken When the DTC Sets
The affected power window will be inoperative.
Conditions for Clearing the DTC
* The DTC will be current for as long as the fault is present.
2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 674
2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 674
DTC Descriptors
DTC B3109 00
- Keyless Entry Transmitter 1 Low Battery
DTC B3110 00
- Keyless Entry Transmitter 2 Low Battery
DTC B3111 00
- Keyless Entry Transmitter 3 Low Battery
DTC B3112 00
- Keyless Entry Transmitter 4 Low Battery
Circuit/System Description
With each press of a keyless entry transmitter button, a message containing the current battery state of the transmitter is sent to the remote control
door lock receiver (RCDLR) along with the commanded keyless entry function.
Conditions for Running the DTC
A keyless transmitter button is pressed.
Conditions for Setting the DTC
The DTC sets after 3 consecutive low battery signals from the same programmed transmitter.
Action Taken When the DTC Sets
The keyless entry system is inoperative.
Conditions for Clearing the DTC
The DTC is cleared when a normal transmitter voltage signal is received from the programmed transmitter that set the DTC.
Diagnostic Aids
The keyless entry transmitter used in the 2-Way Advanced Remote Start System is unique to the system. When servicing or replacing a transmitter,
ensure that the correct transmitter is used. The correct transmitter part number can be found in the Accessory section of the parts catalog.
Attempting to replace a 2-Way Advanced Remote Start transmitter with a regular service part may result in a failure to program the transmitter.
Reference Information
Schematic Reference
Remote Function Schematics (See: Accessories and Optional Equipment/Antitheft and Alarm Systems/Keyless Entry/Keyless Entry
Transmitter/Diagrams/Electrical Diagrams)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views)
Description and Operation
Keyless Entry System Description and Operation (Without Accessory 2 Way Remote) (See: Accessories and Optional Equipment/Antitheft and
Alarm Systems/Keyless Entry/Description and Operation/Keyless Entry System Description and Operation (Without Accessory 2 Way Remote)
)Keyless Entry System Description and Operation (With Accessory 2 Way Remote) (See: Accessories and Optional Equipment/Antitheft and
Alarm Systems/Keyless Entry/Description and Operation/Keyless Entry System Description and Operation (With Accessory 2 Way Remote))
Electrical Information Reference
* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit
Testing/Circuit Testing)
* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic
Procedures/Connector Repairs/Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General
Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring
Repairs/Wiring Repairs)
Scan Tool Reference
Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information
DTC Descriptors
DTC B3109 00
- Keyless Entry Transmitter 1 Low Battery
DTC B3110 00
- Keyless Entry Transmitter 2 Low Battery
DTC B3111 00
- Keyless Entry Transmitter 3 Low Battery
DTC B3112 00
- Keyless Entry Transmitter 4 Low Battery
Circuit/System Description
With each press of a keyless entry transmitter button, a message containing the current battery state of the transmitter is sent to the remote control
door lock receiver (RCDLR) along with the commanded keyless entry function.
Conditions for Running the DTC
A keyless transmitter button is pressed.
Conditions for Setting the DTC
The DTC sets after 3 consecutive low battery signals from the same programmed transmitter.
Action Taken When the DTC Sets
The keyless entry system is inoperative.
Conditions for Clearing the DTC
The DTC is cleared when a normal transmitter voltage signal is received from the programmed transmitter that set the DTC.
Diagnostic Aids
The keyless entry transmitter used in the 2-Way Advanced Remote Start System is unique to the system. When servicing or replacing a transmitter,
ensure that the correct transmitter is used. The correct transmitter part number can be found in the Accessory section of the parts catalog.
Attempting to replace a 2-Way Advanced Remote Start transmitter with a regular service part may result in a failure to program the transmitter.
Reference Information
Schematic Reference
Remote Function Schematics (See: Accessories and Optional Equipment/Antitheft and Alarm Systems/Keyless Entry/Keyless Entry
Transmitter/Diagrams/Electrical Diagrams)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views)
Description and Operation
Keyless Entry System Description and Operation (Without Accessory 2 Way Remote) (See: Accessories and Optional Equipment/Antitheft and
Alarm Systems/Keyless Entry/Description and Operation/Keyless Entry System Description and Operation (Without Accessory 2 Way Remote)
)Keyless Entry System Description and Operation (With Accessory 2 Way Remote) (See: Accessories and Optional Equipment/Antitheft and
Alarm Systems/Keyless Entry/Description and Operation/Keyless Entry System Description and Operation (With Accessory 2 Way Remote))
Electrical Information Reference
* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit
Testing/Circuit Testing)
* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic
Procedures/Connector Repairs/Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General
Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring
Repairs/Wiring Repairs)
Scan Tool Reference
Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information
Monday, December 2, 2019
2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 612
2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 612
DTC Descriptors
DTC B2508 01
- Seat Heater Relay Circuit Short to Battery
DTC B2508 02
- Seat Heater Relay Circuit Short to Ground
Diagnostic Fault Information
Circuit/System Description
The front seat heating elements are controlled by a common high current relay internal to the heated seat module (HSM) and on the low side by
individual element control circuits. The HSM connects the seat heater element supply voltage circuits to a common reference point. This reference
point is biased to approximately 2.5 V. Before the HSM will allow heated seat operation, it checks to see if the heating element supply voltage
circuits and control circuits are shorted to ground or battery voltage. Once the HSM verifies that it is not closing to a shorted heating element, it
allows heated seat operation. After which it continues to monitor for a shorted circuit.
Conditions for Running the DTC
The HSM must be powered.
Conditions for Setting the DTC
B2508 02
Before the heated seats are activated, the HSM detects a short to ground on the seat heating element supply voltage circuit or control circuit.
B2508 01
Before the heated seats are activated, the HSM detects a short to battery voltage on the seat heating element supply voltage circuit or control circuit.
DTC Descriptors
DTC B2508 01
- Seat Heater Relay Circuit Short to Battery
DTC B2508 02
- Seat Heater Relay Circuit Short to Ground
Diagnostic Fault Information
Circuit/System Description
The front seat heating elements are controlled by a common high current relay internal to the heated seat module (HSM) and on the low side by
individual element control circuits. The HSM connects the seat heater element supply voltage circuits to a common reference point. This reference
point is biased to approximately 2.5 V. Before the HSM will allow heated seat operation, it checks to see if the heating element supply voltage
circuits and control circuits are shorted to ground or battery voltage. Once the HSM verifies that it is not closing to a shorted heating element, it
allows heated seat operation. After which it continues to monitor for a shorted circuit.
Conditions for Running the DTC
The HSM must be powered.
Conditions for Setting the DTC
B2508 02
Before the heated seats are activated, the HSM detects a short to ground on the seat heating element supply voltage circuit or control circuit.
B2508 01
Before the heated seats are activated, the HSM detects a short to battery voltage on the seat heating element supply voltage circuit or control circuit.
Sunday, November 24, 2019
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2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 435
DTC Descriptors
DTC B1395 03
- Device Voltage Reference Output 1 Circuit Voltage Below Threshold
DTC B1395 07
- Device Voltage Reference Output 1 Circuit Voltage Above Threshold
Diagnostic Fault Information
Circuit/System Description
Voltage for the interior backlighting components and stop lamp switch activation signal is supplied from the body control module (BCM). The
BCM applies a voltage reference through the instrument panel (I/P) dimming voltage reference circuit to the interior lamp dimming switch, which is
part of the headlamp switch. When the dimming switch is placed in the desired position, the dimmed voltage setting is applied from the interior
lamp dimming switch through the I/P dimming control circuit to the BCM. The BCM then applies the dimmed voltage to the I/P lamps supply
voltage circuit and they dim to the correct level.
The stop lamp switch is also supplied voltage on the same circuit for a stop lamp OFF signal to the BCM. When the stop lamp switch is activated
the voltage signal circuit to the BCM is opened prompting the BCM to illuminate the stop lamps.
Conditions for Running the DTC
* Battery voltage must be between 9-16 V.
* Ignition must be ON.
DTC Descriptors
DTC B1395 03
- Device Voltage Reference Output 1 Circuit Voltage Below Threshold
DTC B1395 07
- Device Voltage Reference Output 1 Circuit Voltage Above Threshold
Diagnostic Fault Information
Circuit/System Description
Voltage for the interior backlighting components and stop lamp switch activation signal is supplied from the body control module (BCM). The
BCM applies a voltage reference through the instrument panel (I/P) dimming voltage reference circuit to the interior lamp dimming switch, which is
part of the headlamp switch. When the dimming switch is placed in the desired position, the dimmed voltage setting is applied from the interior
lamp dimming switch through the I/P dimming control circuit to the BCM. The BCM then applies the dimmed voltage to the I/P lamps supply
voltage circuit and they dim to the correct level.
The stop lamp switch is also supplied voltage on the same circuit for a stop lamp OFF signal to the BCM. When the stop lamp switch is activated
the voltage signal circuit to the BCM is opened prompting the BCM to illuminate the stop lamps.
Conditions for Running the DTC
* Battery voltage must be between 9-16 V.
* Ignition must be ON.
Saturday, November 23, 2019
2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 419
2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 419
DTC Descriptors
DTC B1289 01
- Video Display Brightness Control Signal Short to Battery
DTC B1289 02
- Video Display Brightness Control Signal Short to Ground
DTC B1289 04
- Video Display Brightness Control Signal Open Circuit
Diagnostic Fault Information
Circuit/System Description
The radio can control the video display brightness on vehicles equipped with rear seat entertainment (RSE) video. The radio varies a pulse with
modulated (PWM) signal to the rear entertainment video screen to command the screen brightness to the desired level.
Conditions for Running the DTC
* Ignition ON.
* Battery voltage must be between 9-16 volts.
Conditions for Setting the DTC
The DTC will set when the radio detects a short to voltage, short to ground, or an open/high resistance in the video display brightness control
circuit 400 ms after the radio activates the remote enable circuit.
Action Taken When the DTC Sets
The radio sets the DTC and defaults the video display to full brightness.
Conditions for Clearing the DTC
* The condition responsible for setting the DTC no longer exists.
* A history DTC will clear once 100 consecutive malfunction-free ignition cycles have occurred.
Reference Information
Schematic Reference
Video System Schematics (See: Accessories and Optional Equipment/Diagrams/Electrical Diagrams/Video System Schematics)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views)
Description and Operation
Video Entertainment System Description and Operation (Non-Headrest DVD Systems) (See: Accessories and Optional Equipment/Description
and Operation/Video Entertainment System Description and Operation (Non-Headrest DVD Systems))Video Entertainment System Description
and Operation (Dual Headrest DVD Systems) (See: Accessories and Optional Equipment/Description and Operation/Video Entertainment System
Description and Operation (Dual Headrest DVD Systems))
Electrical Information Reference
* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit
Testing/Circuit Testing)
* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic
Procedures/Connector Repairs/Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General
DTC Descriptors
DTC B1289 01
- Video Display Brightness Control Signal Short to Battery
DTC B1289 02
- Video Display Brightness Control Signal Short to Ground
DTC B1289 04
- Video Display Brightness Control Signal Open Circuit
Diagnostic Fault Information
Circuit/System Description
The radio can control the video display brightness on vehicles equipped with rear seat entertainment (RSE) video. The radio varies a pulse with
modulated (PWM) signal to the rear entertainment video screen to command the screen brightness to the desired level.
Conditions for Running the DTC
* Ignition ON.
* Battery voltage must be between 9-16 volts.
Conditions for Setting the DTC
The DTC will set when the radio detects a short to voltage, short to ground, or an open/high resistance in the video display brightness control
circuit 400 ms after the radio activates the remote enable circuit.
Action Taken When the DTC Sets
The radio sets the DTC and defaults the video display to full brightness.
Conditions for Clearing the DTC
* The condition responsible for setting the DTC no longer exists.
* A history DTC will clear once 100 consecutive malfunction-free ignition cycles have occurred.
Reference Information
Schematic Reference
Video System Schematics (See: Accessories and Optional Equipment/Diagrams/Electrical Diagrams/Video System Schematics)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views)
Description and Operation
Video Entertainment System Description and Operation (Non-Headrest DVD Systems) (See: Accessories and Optional Equipment/Description
and Operation/Video Entertainment System Description and Operation (Non-Headrest DVD Systems))Video Entertainment System Description
and Operation (Dual Headrest DVD Systems) (See: Accessories and Optional Equipment/Description and Operation/Video Entertainment System
Description and Operation (Dual Headrest DVD Systems))
Electrical Information Reference
* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit
Testing/Circuit Testing)
* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic
Procedures/Connector Repairs/Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General
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