2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1576
2. Ignition OFF, wait 2 minutes.
3. Ignition ON, wait 2 minutes and then turn ignition OFF.
4. Ignition ON, monitor DTC Status. DTC P1B10 and P1B0F should have passed last test.
瀚慖f the DTC has passed, clear DTC Information. No further diagnosis of this DTC is necessary.
Circuit/System Testing
1. Inspect for DTCs P0A40, P0A45, P0A46, P0A78, P0A79, P0A3F, P0C05, P0C08, P0C0B, P0C0E, P0C4E, P0C4F, P0C52, P0C53, P0C57,
P0C58, P0C61, P0C62, P0C5C, P0C5D, P1B03, P1B04 or P1B0D.
瀚慖f any of the above DTCs are set, diagnose and repair them prior to performing this diagnostic.
2. Ignition ON, engine OFF. Observe the BECM Hybrid Battery Pack Calculated parameter. The hybrid battery voltage should be greater than
192V.
瀚慖f the hybrid battery voltage is less than 192V, replace the drive motor generator battery.
3. Turn the ignition OFF and wait 2 minutes.
4. Ignition ON, monitor DTC Status. DTC P1B10 and P1B0F should have passed last test.
瀚慖f DTC P0C4E or P0C4F sets, proceed to that diagnostic procedure.
瀚慖f DTC P1B10 and P1B0F have passed, clear DTC Information. No further diagnosis is necessary.
瀚慖f DTC P1B10 or P1B0F resets, program the PIM with the latest software version and recheck for DTCs. If the DTC resets after
programming or if the PIM already contains the latest software version, replace the applicable drive motor generator assembly.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Drive Motor with Generator Assembly Removal - 1st Position (See: Transmission and Drivetrain/Automatic
Transmission/Transaxle/Service and Repair/Overhaul/2ML70 - Automatic Transmission/8. Drive Motor with Generator Assembly Removal -
1st Position)
* 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)
* Drive Motor Generator Battery Replacement and Shipping Preparation ()
* Drive Motor Battery with Case Overhaul ()
P1B01
DTC P1AFB or P1B01
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 P1AFB
- Drive Motor 1 Control Module Programmable Logic Device Security Code
DTC P1B01
- Drive Motor 2 Control Module Programmable Logic Device Security Code
Circuit/System Description
This diagnostic applies to internal microprocessor integrity conditions within the hybrid powertrain control module (HPCM). The HPCM and each
Motor Control Module (MCM) utilize a programmable logic device (PLD) to perform certain input and output functions. MCM 1 programs the
PLD with software at every ignition ON event. MCM 1 and 2 verify that the PLD is programmed successfully.
Conditions for Running the DTC
