2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1999

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1999

P0220, P0222, P0223, P0335, P0336, P0606, P0641, P0651, P1516, P2101, P2120, P2122, P2123, P2125, P2127, P2128, P2135, P2138, and

P2176 are not set.

* When DTC P0315 is set, the engine speed must be more than 1,000 RPM.

* Engine run time is more than 2 crankshaft revolutions.

* The engine speed is between 375-5,600 RPM.

* The ignition voltage is between 9-18 volts.

* The engine coolant temperature (ECT) is between -7 and +130掳C (+19 and +266掳F).

* When the startup ECT is colder than -7掳C (+19掳F), this diagnostic will be delayed until the ECT is warmer than +21掳C (+69掳F).

* The fuel level is more than 10 percent.

* The ECM is not in fuel shut-off, or decel fuel cut-off mode.

* The electronic brake control module (EBCM) and the traction control system (TCS) are not active or detecting rough road.

* An automatic transmission shift with a throttle position more than 95 percent is not occuring.

* The power management is not active.

* Excessive drive wheel slip is not detected.

* The power take-off (PTO) is disabled, where applicable.

* The cylinder deactivation is not in progress, where applicable.

* DTCs P0300-P0308 run continuously when the above conditions are met.

Conditions for Setting the DTC

DTC P0300

The ECM is detecting a crankshaft speed change indicating a random misfire is occuring that exceeds mandated emission level standards or is at

catalytic converter damaging levels.

DTC P0301, P0302, P0303, P0304, P0305, P0306, P0307, or P0308

The ECM is detecting a crankshaft speed change indicating a single cylinder misfire is occuring that exceeds mandated emission level standards or

is at catalytic converter damaging levels.

Action Taken When the DTC Sets

* DTCs P0300-P0308 are Type B DTCs.

* When the MIL is flashing the fuel injector may be disabled for the misfiring cylinder to protect the catalytic converter.

* Depending on the conditions that set the DTC, the engine may go into Open Loop.

Conditions for Clearing the MIL/DTC

* DTCs P0300-P0308 are Type B DTCs.

* The DTC must run and pass under the same operating conditions that were present when the DTC failed.

Diagnostic Aids

* Ensure that each fuel injector is connected to the proper fuel injector harness connector.

* A misfire may only occur when the engine is operating under a load or when the engine is cold.

* A high resistance condition on any ignition control (IC) circuit can cause an engine misfire P0300-P0308 DTC to set without setting an IC

circuit P0351-P0358 DTC.

* This test procedure requires that the vehicle battery has passed a load test and is completely charged. Refer to Battery Inspection/Test (See:

Starting and Charging/Testing and Inspection/Component Tests and General Diagnostics/Battery Inspection/Test).

* A misfire DTC could be caused by an excessive vibration from sources other than the engine. Inspect the following for possible sources of

vibration:

- A tire or wheel that is out of round or balance

- Variable thickness brake rotors

- An unbalanced drive shaft

- Certain rough road conditions

- A damaged accessory drive component or belt

- A damaged reluctor wheel

- The Crankshaft Position System Variation Learn procedure may need to be performed.

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

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1950

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1950

DTC P0120, P0122, P0123, P0220, P0222, P0223, or P2135

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

DTC Descriptors

DTC P0120

- Throttle Position (TP) Sensor 1 Circuit

DTC P0122

- Throttle Position (TP) Sensor 1 Circuit Low Voltage

DTC P0123

- Throttle Position (TP) Sensor 1 Circuit High Voltage

DTC P0220

- Throttle Position (TP) Sensor 2 Circuit

DTC P0222

- Throttle Position (TP) Sensor 2 Circuit Low Voltage

DTC P0223

- Throttle Position (TP) Sensor 2 Circuit High Voltage

DTC P2135

- Throttle Position (TP) Sensor 1-2 Correlation

Diagnostic Fault Information

Typical Scan Tool Data

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1078

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1078

P0223

The ECM detects the throttle position sensor 2 signal voltage is greater than 4.9 V for greater than 1 s or a cumulative of 4 s.

Action Taken When the DTC Sets

* DTCs P0121 and P0221 are Type B DTCs.

* DTCs P0122, P0123, P0222, and P0223 are Type A DTCs.

Conditions for Clearing the DTC

* DTCs P0121 and P0221 are Type B DTCs.

* DTCs P0122, P0123, P0222, and P0223 are Type A DTCs.

Diagnostic Aids

If there is a condition with the throttle position sensors, the ECM defaults to reduced power mode for the entire ignition cycle, even if the condition

is corrected.

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

Component Connector End Views (See: Diagrams/Connector Views/Connector End Views By Name)

Description and Operation

Throttle Actuator Control (TAC) System Description (See: Powertrain Management/Computers and Control Systems/Description and

Operation/Throttle Actuator Control (TAC) System Description)

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)

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code

(DTC) Type Definitions)

Scan Tool Reference

Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information

Circuit/System Verification

1. Ignition ON, verify that DTC P0697, P0698, or P0699 is not set.

瀚慖f a DTC is set, refer to DTC P0641-P0643, P0651-P0653, or P0697-P0699 (ECM, LAU) ( See: P Code Charts/P0641/ECM) for further

diagnosis.

2. Clear the DTC Info with a scan tool.

3. Start the engine, observe the scan tool Throttle Position Sensor 1 and 2 Voltage parameters. throttle position sensor 1 should be between

0.17-4.6 V, and throttle position sensor 2 should be between 0.15-4.8 V.

4. Observe the scan tool Throttle Position Sensor 1 and 2 parameters while performing the tests listed below. The parameter should display

Agree.

* Rapidly depress the accelerator pedal from the rest position to the WOT position and release pedal. Repeat the procedure several times.

* Slowly depress the accelerator pedal to WOT, then slowly return the pedal to closed throttle. Repeat the procedure several times.

5. Observe the DTC information with a scan tool. DTCs P0121, P0122, P0123, P0221, P0222, and P0223 should not set.

6. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the

conditions that you observed from the Freeze Frame/Failure Records data.

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1163

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1163

P0223

DTC P0121-P0123 or P0221-P0223 (Without LF1, LFW)

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

DTC Descriptors

DTC P0121

- Throttle Position Sensor 1 Performance

DTC P0122

- Throttle Position Sensor 1 Circuit Low Voltage

DTC P0123

- Throttle Position Sensor 1 Circuit High Voltage

DTC P0221

- Throttle Position Sensor 2 Performance

DTC P0222

- Throttle Position Sensor 2 Circuit Low Voltage

DTC P0223

- Throttle Position Sensor 2 Circuit High Voltage

Diagnostic Fault Information

Typical Scan Tool Data

Circuit/System Description

The throttle body assembly contains 2 throttle position sensors. The throttle position sensors are mounted to the throttle body assembly and are not

serviceable. The throttle position sensors provide a signal voltage that changes relative to throttle blade angle. The engine control module (ECM)

supplies the throttle position sensors with a common 5 V reference circuit , a common low reference circuit, and two independent signal circuits.

The throttle position sensors have opposite functionality. Throttle position sensor 1 signal voltage decreases from greater than 4 V at idle to less

than 1 V at wide open throttle (WOT). Throttle position sensor 2 signal voltage increases from less than 1 V at idle to greater than 4 V at WOT.