2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1574

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1574

Action Taken When the DTC Sets

* DTCs P1B0D and P1B0E are Type A DTCs.

* The hybrid powertrain control module (HPCM) commands the battery energy control module (BECM) to open the high voltage contactor

relays.

Conditions for Clearing the DTC

DTCs P1B0D and P1B0E are Type A DTCs.

Diagnostic Aids

* The drive axle and drive motor generator 2 are joined mechanically through a planetary gear set, any condition that allows the rear axle to

rotate too fast while the transmission is in gear may cause DTC P1B0E to set. Ask the operator if the vehicle was subjected to downhill

coasting at an excessive speed.

* A transmission mechanical failure that occurs during high drive motor generator torque may cause these DTCs to set.

* Any condition which causes either MCM to receive incorrect or corrupt GM LAN information may cause these DTCs to set. Inspect for

communication DTCs.

* Repeated drive motor generator operation at speeds in excess of the DTC limits may cause deterioration of the drive motor generator

magnets.

Reference Information

DTC Type Reference

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

(DTC) Type Definitions)

Circuit/System Verification

1. Inspect for transmission control module (TCM) DTC P0723, any other DTCs that would indicate an internal transmission mechanical

concern or any vehicle communication U-code DTCs.

瀚慖f any of the specified DTCs are set, repair them first. Refer to Diagnostic Trouble Code (DTC) List - Vehicle (See: Diagnostic Trouble

Code Descriptions/Diagnostic Trouble Code (DTC) List - Vehicle).

2. Clear the DTC information.

3. Turn the ignition OFF for 1 minute.

Important: DTC P1B0E may be the result of driving conditions or habits.

4. Operate the vehicle under the conditions for running.

5. Retest for DTCs P1B0D and P1B0E.

瀚慖f the DTC 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 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 replacement, setup, and programming.

P1B0F

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.