P1B0E

DTC P1B0D or P1B0E

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions Diagnostic Procedure Instructionsprovides an overview of each diagnostic category.

DTC Descriptor
DTC P1B0D
- Drive Motor 1 Control Module Drive Motor 1 Overspeed

DTC P1B0E
- Drive Motor 2 Control Module Drive Motor 2 Overspeed

Circuit/System Description

The drive motor generator position sensor is monitored by the motor control module. The motor control module 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 allows the motor control module to determine the exact position, speed and direction of the drive motor generator.

Conditions for Running the DTC

* Ignition voltage is 8-18V.
* Motor control module temperature and voltage out of range DTCs have not set.
* Drive motor generator speed greater than 11,500 RPM.

Conditions for Setting the DTC

The motor control module detects drive motor generator speed greater than 10,000 RPM after an initial detection of greater than 11,500 RPM.

Action Taken When the DTC Sets

* DTCs P1B0D and P1B0E are Type A DTCs.
* The hybrid powertrain control module commands the battery energy control module 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.
* 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 Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Circuit/System Verification

1. Verify that DTC P0723 is not set.

• If the DTC is set, refer to DTC P0721-P0723 P0721.

2. Verify there is no other hybrid Transmission DTCs set.

• If other Hybrid Transmission DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle Diagnostic Trouble Code (DTC) List - Vehicle.

3. Ignition OFF for at least one minute. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. Verify that DTCs P1B0D or P1B0E is not set.
4. If DTCs P1B0D or P1B0E is set, program the drive motor generator power inverter module with the latest software version. If the DTC resets replace the T6 drive motor generator power inverter module.

Repair Instructions

Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.

Control Module References Programming and Relearning for Drive Motor Generator Power Inverter replacement, setup, and programming.