2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 1256
The High Voltage Disabling procedure will perform the following tasks:
* Identify how to disable high voltage.
* Identify how to test for the presence of high voltage.
* Identify condition under which high voltage is always present and personal protection equipment (PPE) and proper procedures
must be followed.
Failure to follow the procedures exactly as written may result in serious injury or death.
1. Ignition OFF, disable the high voltage at the drive motor generator battery. Refer to High Voltage Disabling ().
2. Disconnect the X4 harness connector at the drive motor battery control module.
3. Connect the EL-48571 high voltage battery pin out box.
4. Install the high voltage manual disconnect lever. Measure and record each of the 20 battery voltages.
5. Each battery voltage reading should be between 10-19 V.
瀚慖f not within the specified range, replace the drive motor battery assembly.
6. Each battery voltage reading should be within 1.5 V of each other.
瀚慖f not within the specified range, replace the drive motor battery assembly.
7. If all circuits test normal, replace the drive motor generator battery control module.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the repair.
* Drive Motor Generator Battery Replacement and Shipping Preparation ()
* Control Module References (See: Testing and Inspection/Programming and Relearning) for drive motor generator battery control module
replacement, setup and programming.
P0BC1
DTC P0A81 or P0BC1
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 P0A81
- Hybrid Battery Pack Cooling Fan Control Circuit
DTC P0BC1
- Hybrid Battery Pack Cooling Fan Positive Voltage Control Circuit High Voltage
Diagnostic Fault Information
Circuit/System Description
The drive motor generator battery is cooled by a drive motor battery vent fan motor. The battery vent fan motor and battery vent fan relay are
located inside the drive motor generator battery assembly. B+ to the battery vent fan is provided from the battery vent fan relay when the drive
Showing posts with label The High Voltage Disabling procedure will perform the following tasks:. Show all posts
Showing posts with label The High Voltage Disabling procedure will perform the following tasks:. Show all posts
Wednesday, November 6, 2019
Tuesday, November 5, 2019
2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 1157
2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 1157
The High Voltage Disabling procedure will perform the following tasks:
* Identify how to disable high voltage.
* Identify how to test for the presence of high voltage.
* Identify condition under which high voltage is always present and personal protection equipment (PPE) and proper procedures
must be followed.
Before working on any high voltage system, be sure to wear the following Personal Protection Equipment:
* Safety glasses with appropriate side shields when within 50 feet of the vehicle, either indoors or outdoors.
* Certified and up-to-date Class "0" Insulation gloves rated at 1000V with leather protectors.
- Visually and functionally inspect the gloves before use.
- Wear the Insulation gloves at all times when working with the high voltage battery assembly, whether the system is energized or
not.
Failure to follow the procedures exactly as written may result in serious injury or death.
1. Ignition OFF, disable the high voltage at the drive motor generator battery. Refer to High Voltage Disabling ().
2. Verify that none of the following conditions exist:
* the inlet and outlet air vents do not have any obstructions or blockages
* the vent fan blades are not broken or damaged
* the internal foam seals are not missing or damaged
瀚慖f any conditions are found, remove, repair or replace as necessary.
3. Ignition OFF, disconnect the X3 harness connector at the drive motor generator battery control module.
4. Test for 1k ohm-209k ohm between each of the terminals listed below. The resistance of each temperature sensor should be within the
specified range, and within 500 ohm of each other. Refer to Temperature Versus Resistance ().
* Sensor 1-5 V reference circuit terminal 1 and low reference circuit terminal 2
* Sensor 2-5 V Reference circuit terminal 3 and low reference circuit terminal 4
* Sensor 3-5 V Reference circuit terminal 5 and low reference circuit terminal 6
* Sensor 4-5 V Reference circuit terminal 7 and low reference circuit terminal 8
瀚慖f not within the specified range, replace the drive motor battery sensor module wiring harness.
5. If all circuits test normal, replace the drive motor generator battery control module.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Drive Motor Battery Sensor Module Wiring Harness Replacement ()
* Control Module References (See: Testing and Inspection/Programming and Relearning) for drive motor generator battery control module
replacement, setup and programming
P0AEE
DTC P0AEE, P0AEF, P0AF0, P0AF3-P0AF5, P0BD2-P0BD4, P0BD7-P0BD9, P0BDC-P0BDE, or P0BE1-P0BE3
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.
The High Voltage Disabling procedure will perform the following tasks:
* Identify how to disable high voltage.
* Identify how to test for the presence of high voltage.
* Identify condition under which high voltage is always present and personal protection equipment (PPE) and proper procedures
must be followed.
Before working on any high voltage system, be sure to wear the following Personal Protection Equipment:
* Safety glasses with appropriate side shields when within 50 feet of the vehicle, either indoors or outdoors.
* Certified and up-to-date Class "0" Insulation gloves rated at 1000V with leather protectors.
- Visually and functionally inspect the gloves before use.
- Wear the Insulation gloves at all times when working with the high voltage battery assembly, whether the system is energized or
not.
Failure to follow the procedures exactly as written may result in serious injury or death.
1. Ignition OFF, disable the high voltage at the drive motor generator battery. Refer to High Voltage Disabling ().
2. Verify that none of the following conditions exist:
* the inlet and outlet air vents do not have any obstructions or blockages
* the vent fan blades are not broken or damaged
* the internal foam seals are not missing or damaged
瀚慖f any conditions are found, remove, repair or replace as necessary.
3. Ignition OFF, disconnect the X3 harness connector at the drive motor generator battery control module.
4. Test for 1k ohm-209k ohm between each of the terminals listed below. The resistance of each temperature sensor should be within the
specified range, and within 500 ohm of each other. Refer to Temperature Versus Resistance ().
* Sensor 1-5 V reference circuit terminal 1 and low reference circuit terminal 2
* Sensor 2-5 V Reference circuit terminal 3 and low reference circuit terminal 4
* Sensor 3-5 V Reference circuit terminal 5 and low reference circuit terminal 6
* Sensor 4-5 V Reference circuit terminal 7 and low reference circuit terminal 8
瀚慖f not within the specified range, replace the drive motor battery sensor module wiring harness.
5. If all circuits test normal, replace the drive motor generator battery control module.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Drive Motor Battery Sensor Module Wiring Harness Replacement ()
* Control Module References (See: Testing and Inspection/Programming and Relearning) for drive motor generator battery control module
replacement, setup and programming
P0AEE
DTC P0AEE, P0AEF, P0AF0, P0AF3-P0AF5, P0BD2-P0BD4, P0BD7-P0BD9, P0BDC-P0BDE, or P0BE1-P0BE3
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.
Monday, November 4, 2019
2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 1111
2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 1111
The High Voltage Disabling procedure will perform the following tasks:
* Identify how to disable high voltage.
* Identify how to test for the presence of high voltage.
* Identify condition under which high voltage is always present and personal protection equipment (PPE) and proper procedures must
be followed.
Failure to follow the procedures exactly as written may result in serious injury or death.
1. Ignition OFF, disable the high voltage at the drive motor generator battery. Refer to High Voltage Disabling ().
2. Connect the 12 V battery.
Note: The following tests require wearing personal protection equipment (PPE) gloves.
3. Ignition ON, engine OFF, command the high voltage negative contactor closed with a scan tool. Test for less than 0.5 ohm between the high
voltage negative contactor terminals X2 and X3.
瀚慖f greater than the specified range, replace the negative contactor relay.
4. Command the high voltage positive contactor closed with a scan tool. Test for less than 0.5 ohm between the high voltage positive contactor
terminals X2 and X3.
瀚慖f greater than the specified range, replace the positive contactor relay.
5. Ignition OFF, test for less than 5 ohm between the high voltage negative contactor terminal X2 and the drive motor generator battery negative
terminal.
瀚慖f greater than the specified range, replace the drive motor negative relay cable.
6. Test for less than 5 ohm between the high voltage positive contactor terminal X2 and drive motor generator battery positive terminal.
瀚慖f greater than the specified range, replace the drive motor positive relay cable.
7. Disconnect the X5 harness connector at the drive motor generator battery control module.
8. Test for less than 5 ohm between the high voltage negative contactor terminal X3 and the ground terminal 5 X5.
瀚慖f greater than the specified range, replace the drive motor battery positive and negative cable.
9. Test for less than 5 ohm between the high voltage positive contactor terminal X3 and drive motor generator battery control module terminal 1
X5.
瀚慖f greater than the specified range, replace the drive motor positive and negative cable.
10. Disconnect the X4 harness connector at the drive motor generator battery control module.
11. Connect the EL-48571 high voltage battery pin out box.
12. Install the high voltage manual disconnect lever. Measure and record each of the 20 battery voltages.
13. Each battery voltage reading should be between 10-19 V.
瀚慖f not within the specified range, replace the drive motor battery assembly.
14. Each battery voltage reading should be within 1.5 V of each other.
瀚慖f not within the specified range, replace the drive motor battery assembly.
15. If all circuits test normal, replace the drive motor generator battery control module.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the repair.
* Drive Motor Battery Negative High Voltage Contactor Relay Replacement ()
* Drive Motor Battery Positive High Voltage Contactor Relay Replacement ()
* Drive Motor Battery Positive and Negative Cable Replacement ()
* Drive Motor Generator Battery Replacement and Shipping Preparation ()
* Control Module References (See: Testing and Inspection/Programming and Relearning) for drive motor generator battery control
replacement, setup and programming
The High Voltage Disabling procedure will perform the following tasks:
* Identify how to disable high voltage.
* Identify how to test for the presence of high voltage.
* Identify condition under which high voltage is always present and personal protection equipment (PPE) and proper procedures must
be followed.
Failure to follow the procedures exactly as written may result in serious injury or death.
1. Ignition OFF, disable the high voltage at the drive motor generator battery. Refer to High Voltage Disabling ().
2. Connect the 12 V battery.
Note: The following tests require wearing personal protection equipment (PPE) gloves.
3. Ignition ON, engine OFF, command the high voltage negative contactor closed with a scan tool. Test for less than 0.5 ohm between the high
voltage negative contactor terminals X2 and X3.
瀚慖f greater than the specified range, replace the negative contactor relay.
4. Command the high voltage positive contactor closed with a scan tool. Test for less than 0.5 ohm between the high voltage positive contactor
terminals X2 and X3.
瀚慖f greater than the specified range, replace the positive contactor relay.
5. Ignition OFF, test for less than 5 ohm between the high voltage negative contactor terminal X2 and the drive motor generator battery negative
terminal.
瀚慖f greater than the specified range, replace the drive motor negative relay cable.
6. Test for less than 5 ohm between the high voltage positive contactor terminal X2 and drive motor generator battery positive terminal.
瀚慖f greater than the specified range, replace the drive motor positive relay cable.
7. Disconnect the X5 harness connector at the drive motor generator battery control module.
8. Test for less than 5 ohm between the high voltage negative contactor terminal X3 and the ground terminal 5 X5.
瀚慖f greater than the specified range, replace the drive motor battery positive and negative cable.
9. Test for less than 5 ohm between the high voltage positive contactor terminal X3 and drive motor generator battery control module terminal 1
X5.
瀚慖f greater than the specified range, replace the drive motor positive and negative cable.
10. Disconnect the X4 harness connector at the drive motor generator battery control module.
11. Connect the EL-48571 high voltage battery pin out box.
12. Install the high voltage manual disconnect lever. Measure and record each of the 20 battery voltages.
13. Each battery voltage reading should be between 10-19 V.
瀚慖f not within the specified range, replace the drive motor battery assembly.
14. Each battery voltage reading should be within 1.5 V of each other.
瀚慖f not within the specified range, replace the drive motor battery assembly.
15. If all circuits test normal, replace the drive motor generator battery control module.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the repair.
* Drive Motor Battery Negative High Voltage Contactor Relay Replacement ()
* Drive Motor Battery Positive High Voltage Contactor Relay Replacement ()
* Drive Motor Battery Positive and Negative Cable Replacement ()
* Drive Motor Generator Battery Replacement and Shipping Preparation ()
* Control Module References (See: Testing and Inspection/Programming and Relearning) for drive motor generator battery control
replacement, setup and programming
Wednesday, October 30, 2019
2010 Cadillac Truck Escalade ESV AWD V8-6.2L Page 1616
2010 Cadillac Truck Escalade ESV AWD V8-6.2L Page 1616
The High Voltage Disabling procedure will perform the following tasks:
* Identify how to disable high voltage.
* Identify how to test for the presence of high voltage.
* Identify condition under which high voltage is always present and personal protection equipment (PPE) and proper procedures
must be followed.
Failure to follow the procedures exactly as written may result in serious injury or death.
2. Disable the high voltage for servicing at the drive motor generator control module assembly cable connections. Refer to High Voltage
Disabling ().
3. Inspect for damaged 3 phase cables between the PIM and the transmission.
锟斤拷If damage is observed, replace the 3 phase cables.
4. Inspect the 3 phase cable terminal fasteners for the proper torque and for arc-flash damage.
锟斤拷If any fasteners were loose and no arc flash damage is present, torque the fasteners and re-assemble the vehicle. Retest for the DTC.
锟斤拷If any fasteners were loose and arc flash damage is present, replace the PIM and the 3 phase cable assembly.
5. Remove the 3 phase cable assembly from the PIM distribution box. Refer to Generator Control Module 3-Phase Cable Assembly
Replacement ().
6. Test the resistance of each phase by measuring between the following circuits with a DMM.
* Phase U and phase V
* Phase U and phase W
锟斤拷If you measure 0.5 ohms or less, continue with Circuit/System Testing.
锟斤拷If you measure more than 0.5 ohms, proceed to Open Phase Testing Procedure below.
7. Test the resistance to ground for each phase of the applicable drive motor generator by measuring between the following points with a DMM.
* Phase U terminal and chassis ground
* Phase V terminal and chassis ground
* Phase W terminal and chassis ground
锟斤拷If infinite resistance is measured, replace the 3-phase cable assembly and the drive motor generator assembly that corresponds to the set
DTC and retest for the DTC. If the DTC resets replace the PIM.
锟斤拷If less than infinite is measured, continue with Circuit/System Testing.
8. Remove the 3-phase cable assembly from the transmission. Refer to Generator Control Module 3-Phase Cable Assembly Replacement ().
Ensure the terminals are not contacting chassis ground.
9. Retest the resistance to ground for each phase of the 3-phase cable. Measure between the following points with a DMM.
* Phase U terminal and shield ground
* Phase V terminal and shield ground
* Phase W terminal and shield ground
锟斤拷If infinite resistance is measured, replace the applicable drive motor generator.
锟斤拷If less than infinite is measured, replace the generator control module 3-phase cable assembly.
Open Phase Testing Procedure
1. Remove the 3 phase cable assembly cover from the transmission and inspect the 3 phase cable terminal fasteners for the proper torque and for
arc-flash damage. Refer to Generator Control Module 3-Phase Cable Assembly Replacement ().
锟斤拷If any fasteners were loose and no arc flash damage is present, torque the fasteners and re-assemble the vehicle. Retest for the DTC.
锟斤拷If any fasteners were loose and arc flash damage is present, replace the applicable drive motor generator assembly and the 3 phase cable
assembly.
2. Disconnect the 3 phase cable assembly from the transmission. Refer to Generator Control Module 3-Phase Cable Assembly Replacement ().
3. Test each cable for continuity from the PIM connection terminal to the transmission connection terminal.
锟斤拷If you measure greater than 0.5 ohms, replace the 3 phase cable assembly.
锟斤拷If you measure 0.5 ohms or less, replace the applicable drive motor generator assembly.
The High Voltage Disabling procedure will perform the following tasks:
* Identify how to disable high voltage.
* Identify how to test for the presence of high voltage.
* Identify condition under which high voltage is always present and personal protection equipment (PPE) and proper procedures
must be followed.
Failure to follow the procedures exactly as written may result in serious injury or death.
2. Disable the high voltage for servicing at the drive motor generator control module assembly cable connections. Refer to High Voltage
Disabling ().
3. Inspect for damaged 3 phase cables between the PIM and the transmission.
锟斤拷If damage is observed, replace the 3 phase cables.
4. Inspect the 3 phase cable terminal fasteners for the proper torque and for arc-flash damage.
锟斤拷If any fasteners were loose and no arc flash damage is present, torque the fasteners and re-assemble the vehicle. Retest for the DTC.
锟斤拷If any fasteners were loose and arc flash damage is present, replace the PIM and the 3 phase cable assembly.
5. Remove the 3 phase cable assembly from the PIM distribution box. Refer to Generator Control Module 3-Phase Cable Assembly
Replacement ().
6. Test the resistance of each phase by measuring between the following circuits with a DMM.
* Phase U and phase V
* Phase U and phase W
锟斤拷If you measure 0.5 ohms or less, continue with Circuit/System Testing.
锟斤拷If you measure more than 0.5 ohms, proceed to Open Phase Testing Procedure below.
7. Test the resistance to ground for each phase of the applicable drive motor generator by measuring between the following points with a DMM.
* Phase U terminal and chassis ground
* Phase V terminal and chassis ground
* Phase W terminal and chassis ground
锟斤拷If infinite resistance is measured, replace the 3-phase cable assembly and the drive motor generator assembly that corresponds to the set
DTC and retest for the DTC. If the DTC resets replace the PIM.
锟斤拷If less than infinite is measured, continue with Circuit/System Testing.
8. Remove the 3-phase cable assembly from the transmission. Refer to Generator Control Module 3-Phase Cable Assembly Replacement ().
Ensure the terminals are not contacting chassis ground.
9. Retest the resistance to ground for each phase of the 3-phase cable. Measure between the following points with a DMM.
* Phase U terminal and shield ground
* Phase V terminal and shield ground
* Phase W terminal and shield ground
锟斤拷If infinite resistance is measured, replace the applicable drive motor generator.
锟斤拷If less than infinite is measured, replace the generator control module 3-phase cable assembly.
Open Phase Testing Procedure
1. Remove the 3 phase cable assembly cover from the transmission and inspect the 3 phase cable terminal fasteners for the proper torque and for
arc-flash damage. Refer to Generator Control Module 3-Phase Cable Assembly Replacement ().
锟斤拷If any fasteners were loose and no arc flash damage is present, torque the fasteners and re-assemble the vehicle. Retest for the DTC.
锟斤拷If any fasteners were loose and arc flash damage is present, replace the applicable drive motor generator assembly and the 3 phase cable
assembly.
2. Disconnect the 3 phase cable assembly from the transmission. Refer to Generator Control Module 3-Phase Cable Assembly Replacement ().
3. Test each cable for continuity from the PIM connection terminal to the transmission connection terminal.
锟斤拷If you measure greater than 0.5 ohms, replace the 3 phase cable assembly.
锟斤拷If you measure 0.5 ohms or less, replace the applicable drive motor generator assembly.
Tuesday, October 29, 2019
2010 Cadillac Truck Escalade ESV AWD V8-6.2L Page 1520
2010 Cadillac Truck Escalade ESV AWD V8-6.2L Page 1520
The High Voltage Disabling procedure will perform the following tasks:
* Identify how to disable high voltage.
* Identify how to test for the presence of high voltage.
* Identify condition under which high voltage is always present and personal protection equipment (PPE) and proper procedures
must be followed.
Failure to follow the procedures exactly as written may result in serious injury or death.
1. Disable the high voltage for servicing at the Drive Motor Generator Control Module Assembly cable connections. Refer to High Voltage
Disabling ().
2. Inspect for damaged 3 phase cables between the drive motor generator power inverter control module (PIM) and the transmission.
锟斤拷If damage is observed, replace the 3 phase cables.
3. Remove the 3 phase cable assembly from the PIM distribution box. Refer to Generator Control Module 3-Phase Cable Assembly
Replacement ().
4. Test the resistance of each phase by measuring between the following circuits with a DMM.
* Phase U and phase V
* Phase U and phase W
锟斤拷If you meaure 0.5 ohms or less replace the drive motor generator assembly and retest for the DTC. If the DTC resets, replace the PIM.
锟斤拷If you measure greater than 0.5 ohms continue with diagnosis.
5. Remove the 3 phase cable assembly cover from the transmission and inspect the 3 phase cable terminal fasteners for the proper torque and for
arc-flash damage. Refer to Generator Control Module 3-Phase Cable Assembly Replacement ().
锟斤拷If any fasteners were loose and no arc-flash damage is present, torque the fasteners and re-assembly the vehicle. Retest for the DTC.
锟斤拷If any fasteners were loose and arc-flash damage is present, replace the drive motor generator assembly and the 3 phase cable assembly.
6. Disconnect the 3 phase cable assembly from the transmission.
7. Test each cable for continuity from the PIM connection terminal to the transmission connection terminal.
锟斤拷If you measure greater than 0.5 ohms, replace the 3 phase cable assembly.
锟斤拷If you measure 0.5 ohms or less replace the drive motor generator assembly.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Control Module References (See: Testing and Inspection/Programming and Relearning) for PIM replacement, setup, and programming.
* Generator Control Module 3-Phase Cable Assembly Replacement ().
* Drive Motor with Generator Assembly Removal - 2nd Position (See: Transmission and Drivetrain/Automatic
Transmission/Transaxle/Service and Repair/Overhaul/2ML70 - Automatic Transmission/13. Drive Motor with Generator Assembly Removal
- 2nd Position).
P0C11
DTC P0C11-P0C16
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 Descriptor
DTC P0C11
- Drive Motor 1 Inverter Phase U Overtemperature
The High Voltage Disabling procedure will perform the following tasks:
* Identify how to disable high voltage.
* Identify how to test for the presence of high voltage.
* Identify condition under which high voltage is always present and personal protection equipment (PPE) and proper procedures
must be followed.
Failure to follow the procedures exactly as written may result in serious injury or death.
1. Disable the high voltage for servicing at the Drive Motor Generator Control Module Assembly cable connections. Refer to High Voltage
Disabling ().
2. Inspect for damaged 3 phase cables between the drive motor generator power inverter control module (PIM) and the transmission.
锟斤拷If damage is observed, replace the 3 phase cables.
3. Remove the 3 phase cable assembly from the PIM distribution box. Refer to Generator Control Module 3-Phase Cable Assembly
Replacement ().
4. Test the resistance of each phase by measuring between the following circuits with a DMM.
* Phase U and phase V
* Phase U and phase W
锟斤拷If you meaure 0.5 ohms or less replace the drive motor generator assembly and retest for the DTC. If the DTC resets, replace the PIM.
锟斤拷If you measure greater than 0.5 ohms continue with diagnosis.
5. Remove the 3 phase cable assembly cover from the transmission and inspect the 3 phase cable terminal fasteners for the proper torque and for
arc-flash damage. Refer to Generator Control Module 3-Phase Cable Assembly Replacement ().
锟斤拷If any fasteners were loose and no arc-flash damage is present, torque the fasteners and re-assembly the vehicle. Retest for the DTC.
锟斤拷If any fasteners were loose and arc-flash damage is present, replace the drive motor generator assembly and the 3 phase cable assembly.
6. Disconnect the 3 phase cable assembly from the transmission.
7. Test each cable for continuity from the PIM connection terminal to the transmission connection terminal.
锟斤拷If you measure greater than 0.5 ohms, replace the 3 phase cable assembly.
锟斤拷If you measure 0.5 ohms or less replace the drive motor generator assembly.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Control Module References (See: Testing and Inspection/Programming and Relearning) for PIM replacement, setup, and programming.
* Generator Control Module 3-Phase Cable Assembly Replacement ().
* Drive Motor with Generator Assembly Removal - 2nd Position (See: Transmission and Drivetrain/Automatic
Transmission/Transaxle/Service and Repair/Overhaul/2ML70 - Automatic Transmission/13. Drive Motor with Generator Assembly Removal
- 2nd Position).
P0C11
DTC P0C11-P0C16
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 Descriptor
DTC P0C11
- Drive Motor 1 Inverter Phase U Overtemperature
Saturday, October 26, 2019
2010 Cadillac Truck Escalade ESV AWD V8-6.2L Page 1256
2010 Cadillac Truck Escalade ESV AWD V8-6.2L Page 1256
The High Voltage Disabling procedure will perform the following tasks:
* Identify how to disable high voltage.
* Identify how to test for the presence of high voltage.
* Identify condition under which high voltage is always present and personal protection equipment (PPE) and proper procedures
must be followed.
Failure to follow the procedures exactly as written may result in serious injury or death.
1. Ignition OFF, disable the high voltage at the drive motor generator battery. Refer to High Voltage Disabling ().
2. Disconnect the X4 harness connector at the drive motor battery control module.
3. Connect the EL-48571 high voltage battery pin out box.
4. Install the high voltage manual disconnect lever. Measure and record each of the 20 battery voltages.
5. Each battery voltage reading should be between 10-19 V.
锟斤拷If not within the specified range, replace the drive motor battery assembly.
6. Each battery voltage reading should be within 1.5 V of each other.
锟斤拷If not within the specified range, replace the drive motor battery assembly.
7. If all circuits test normal, replace the drive motor generator battery control module.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the repair.
* Drive Motor Generator Battery Replacement and Shipping Preparation ()
* Control Module References (See: Testing and Inspection/Programming and Relearning) for drive motor generator battery control module
replacement, setup and programming.
P0BC1
DTC P0A81 or P0BC1
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 P0A81
- Hybrid Battery Pack Cooling Fan Control Circuit
DTC P0BC1
- Hybrid Battery Pack Cooling Fan Positive Voltage Control Circuit High Voltage
Diagnostic Fault Information
Circuit/System Description
The drive motor generator battery is cooled by a drive motor battery vent fan motor. The battery vent fan motor and battery vent fan relay are
located inside the drive motor generator battery assembly. B+ to the battery vent fan is provided from the battery vent fan relay when the drive
The High Voltage Disabling procedure will perform the following tasks:
* Identify how to disable high voltage.
* Identify how to test for the presence of high voltage.
* Identify condition under which high voltage is always present and personal protection equipment (PPE) and proper procedures
must be followed.
Failure to follow the procedures exactly as written may result in serious injury or death.
1. Ignition OFF, disable the high voltage at the drive motor generator battery. Refer to High Voltage Disabling ().
2. Disconnect the X4 harness connector at the drive motor battery control module.
3. Connect the EL-48571 high voltage battery pin out box.
4. Install the high voltage manual disconnect lever. Measure and record each of the 20 battery voltages.
5. Each battery voltage reading should be between 10-19 V.
锟斤拷If not within the specified range, replace the drive motor battery assembly.
6. Each battery voltage reading should be within 1.5 V of each other.
锟斤拷If not within the specified range, replace the drive motor battery assembly.
7. If all circuits test normal, replace the drive motor generator battery control module.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the repair.
* Drive Motor Generator Battery Replacement and Shipping Preparation ()
* Control Module References (See: Testing and Inspection/Programming and Relearning) for drive motor generator battery control module
replacement, setup and programming.
P0BC1
DTC P0A81 or P0BC1
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 P0A81
- Hybrid Battery Pack Cooling Fan Control Circuit
DTC P0BC1
- Hybrid Battery Pack Cooling Fan Positive Voltage Control Circuit High Voltage
Diagnostic Fault Information
Circuit/System Description
The drive motor generator battery is cooled by a drive motor battery vent fan motor. The battery vent fan motor and battery vent fan relay are
located inside the drive motor generator battery assembly. B+ to the battery vent fan is provided from the battery vent fan relay when the drive
Friday, October 25, 2019
2010 Cadillac Truck Escalade ESV AWD V8-6.2L Page 1157
2010 Cadillac Truck Escalade ESV AWD V8-6.2L Page 1157
The High Voltage Disabling procedure will perform the following tasks:
* Identify how to disable high voltage.
* Identify how to test for the presence of high voltage.
* Identify condition under which high voltage is always present and personal protection equipment (PPE) and proper procedures
must be followed.
Before working on any high voltage system, be sure to wear the following Personal Protection Equipment:
* Safety glasses with appropriate side shields when within 50 feet of the vehicle, either indoors or outdoors.
* Certified and up-to-date Class "0" Insulation gloves rated at 1000V with leather protectors.
- Visually and functionally inspect the gloves before use.
- Wear the Insulation gloves at all times when working with the high voltage battery assembly, whether the system is energized or
not.
Failure to follow the procedures exactly as written may result in serious injury or death.
1. Ignition OFF, disable the high voltage at the drive motor generator battery. Refer to High Voltage Disabling ().
2. Verify that none of the following conditions exist:
* the inlet and outlet air vents do not have any obstructions or blockages
* the vent fan blades are not broken or damaged
* the internal foam seals are not missing or damaged
锟斤拷If any conditions are found, remove, repair or replace as necessary.
3. Ignition OFF, disconnect the X3 harness connector at the drive motor generator battery control module.
4. Test for 1k ohm-209k ohm between each of the terminals listed below. The resistance of each temperature sensor should be within the
specified range, and within 500 ohm of each other. Refer to Temperature Versus Resistance ().
* Sensor 1-5 V reference circuit terminal 1 and low reference circuit terminal 2
* Sensor 2-5 V Reference circuit terminal 3 and low reference circuit terminal 4
* Sensor 3-5 V Reference circuit terminal 5 and low reference circuit terminal 6
* Sensor 4-5 V Reference circuit terminal 7 and low reference circuit terminal 8
锟斤拷If not within the specified range, replace the drive motor battery sensor module wiring harness.
5. If all circuits test normal, replace the drive motor generator battery control module.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Drive Motor Battery Sensor Module Wiring Harness Replacement ()
* Control Module References (See: Testing and Inspection/Programming and Relearning) for drive motor generator battery control module
replacement, setup and programming
P0AEE
DTC P0AEE, P0AEF, P0AF0, P0AF3-P0AF5, P0BD2-P0BD4, P0BD7-P0BD9, P0BDC-P0BDE, or P0BE1-P0BE3
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.
The High Voltage Disabling procedure will perform the following tasks:
* Identify how to disable high voltage.
* Identify how to test for the presence of high voltage.
* Identify condition under which high voltage is always present and personal protection equipment (PPE) and proper procedures
must be followed.
Before working on any high voltage system, be sure to wear the following Personal Protection Equipment:
* Safety glasses with appropriate side shields when within 50 feet of the vehicle, either indoors or outdoors.
* Certified and up-to-date Class "0" Insulation gloves rated at 1000V with leather protectors.
- Visually and functionally inspect the gloves before use.
- Wear the Insulation gloves at all times when working with the high voltage battery assembly, whether the system is energized or
not.
Failure to follow the procedures exactly as written may result in serious injury or death.
1. Ignition OFF, disable the high voltage at the drive motor generator battery. Refer to High Voltage Disabling ().
2. Verify that none of the following conditions exist:
* the inlet and outlet air vents do not have any obstructions or blockages
* the vent fan blades are not broken or damaged
* the internal foam seals are not missing or damaged
锟斤拷If any conditions are found, remove, repair or replace as necessary.
3. Ignition OFF, disconnect the X3 harness connector at the drive motor generator battery control module.
4. Test for 1k ohm-209k ohm between each of the terminals listed below. The resistance of each temperature sensor should be within the
specified range, and within 500 ohm of each other. Refer to Temperature Versus Resistance ().
* Sensor 1-5 V reference circuit terminal 1 and low reference circuit terminal 2
* Sensor 2-5 V Reference circuit terminal 3 and low reference circuit terminal 4
* Sensor 3-5 V Reference circuit terminal 5 and low reference circuit terminal 6
* Sensor 4-5 V Reference circuit terminal 7 and low reference circuit terminal 8
锟斤拷If not within the specified range, replace the drive motor battery sensor module wiring harness.
5. If all circuits test normal, replace the drive motor generator battery control module.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Drive Motor Battery Sensor Module Wiring Harness Replacement ()
* Control Module References (See: Testing and Inspection/Programming and Relearning) for drive motor generator battery control module
replacement, setup and programming
P0AEE
DTC P0AEE, P0AEF, P0AF0, P0AF3-P0AF5, P0BD2-P0BD4, P0BD7-P0BD9, P0BDC-P0BDE, or P0BE1-P0BE3
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.
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