2010 Cadillac Truck Escalade ESV AWD V8-6.2L Page 1698
Important: Removal of the HV manual disconnect lever also opens the HVIC source circuit between X350 and BECM connector X1.
If the circuit tests normal, perform the High Voltage Disabling () procedure and test the HVIC Source circuit for a short to voltage between X350
and BECM connector X1. If the circuit tests normal, replace the BECM.
4. Ignition ON, test for less than 35 mA with a DMM between the HVIC Return circuit terminal 1 and ground.
锟斤拷If more than the specified range, test the HVIC Return circuit for a short to voltage between PIM connector X1 and X350.
Danger: Always perform the High Voltage Disabling procedure prior to servicing any High Voltage component or connection. Personal
Protection Equipment (PPE) and proper procedures must be followed.
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.
If the circuit tests normal, perform the High Voltage Disabling () procedure and test the HVIC Return circuit for a short to voltage between X350
and BECM connector X1. If the circuit tests normal, replace the BECM.
5. If all circuits test normal, replace the PIM.
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 or BECM replacement, setup, and programming
P1B10
DTC P1B0F or P1B10
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 P1B0F
- Drive Motor 1 Position Learn Incorrect
DTC P1B10
- Drive Motor 2 Position Learn Incorrect
Circuit/System Description
The drive motor generator position sensor is monitored by the motor control module (MCM). The MCM monitors the angular position, speed and
direction of the drive motor generator based upon the signals of the resolver-type position sensor. The position sensor, or resolver, contains a drive
coil, two driven coils and an irregular shaped metallic rotor. The metallic rotor is mechanically attached to the shaft of the drive motor generator. At
ignition ON, the MCM outputs a 7 volt ac, 10 kHz excitation signal to the drive coil. The drive coil excitation signal creates a magnetic field
surrounding the two driven coils and the irregular shaped rotor. The MCM then monitors the two driven coil circuits for a return signal. The
position of the irregular shaped metallic rotor causes the magnetically-induced return signals of the driven coils to vary in size and shape. A
comparison of the two driven coil signals allows the MCM to determine the exact position, speed and direction of the drive motor generator.
The position sensor is a non-serviceable part of the drive motor generator assembly.
A measurement called offset is needed for accurate determination of the motor position. Offset is the relationship between the position sensor and
the drive motor generator output shaft. Whenever the ignition is cycled to OFF, the MCM attempts to learn the offset of the drive motor position
Showing posts with label Important: Removal of the HV manual disconnect lever also opens the HVIC source circuit between X350 and BECM connector X1.. Show all posts
Showing posts with label Important: Removal of the HV manual disconnect lever also opens the HVIC source circuit between X350 and BECM connector X1.. Show all posts
Thursday, October 31, 2019
Wednesday, October 30, 2019
2010 Cadillac Truck Escalade ESV AWD V8-6.2L Page 1588
2010 Cadillac Truck Escalade ESV AWD V8-6.2L Page 1588
Important: Removal of the HV manual disconnect lever also opens the HVIC source circuit between X350 and BECM connector X1.
If the circuit tests normal, perform the High Voltage Disabling () procedure and test the HVIC Source circuit for a short to voltage between X350
and BECM connector X1. If the circuit tests normal, replace the BECM.
4. Ignition ON, test for less than 35 mA with a DMM between the HVIC Return circuit terminal 1 and ground.
锟斤拷If more than the specified range, test the HVIC Return circuit for a short to voltage between PIM connector X1 and X350.
Danger: Always perform the High Voltage Disabling procedure prior to servicing any High Voltage component or connection. Personal
Protection Equipment (PPE) and proper procedures must be followed.
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.
If the circuit tests normal, perform the High Voltage Disabling () procedure and test the HVIC Return circuit for a short to voltage between X350
and BECM connector X1. If the circuit tests normal, replace the BECM.
5. If all circuits test normal, replace the PIM.
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 or BECM replacement, setup, and programming
P1AE3
DTC P1AE2-P1AE4, P1B05, or P1B06
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 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
Important: Removal of the HV manual disconnect lever also opens the HVIC source circuit between X350 and BECM connector X1.
If the circuit tests normal, perform the High Voltage Disabling () procedure and test the HVIC Source circuit for a short to voltage between X350
and BECM connector X1. If the circuit tests normal, replace the BECM.
4. Ignition ON, test for less than 35 mA with a DMM between the HVIC Return circuit terminal 1 and ground.
锟斤拷If more than the specified range, test the HVIC Return circuit for a short to voltage between PIM connector X1 and X350.
Danger: Always perform the High Voltage Disabling procedure prior to servicing any High Voltage component or connection. Personal
Protection Equipment (PPE) and proper procedures must be followed.
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.
If the circuit tests normal, perform the High Voltage Disabling () procedure and test the HVIC Return circuit for a short to voltage between X350
and BECM connector X1. If the circuit tests normal, replace the BECM.
5. If all circuits test normal, replace the PIM.
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 or BECM replacement, setup, and programming
P1AE3
DTC P1AE2-P1AE4, P1B05, or P1B06
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 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
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