P1B0E

DTC P1B0D or P1B0E

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Initial Inspection and Diagnostic Overview
* Review Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions provides 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 (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 allows the MCM to determine the exact angle, speed and direction of the drive motor generator.

Conditions for Running the DTC

* Ignition voltage is 8-18 volts.
* MCM temperature and voltage out of range DTCs have not set.
* Drive motor generator speed more than 11,500 RPM.

Conditions for Setting the DTC

The MCM detects drive motor generator speed more than 10,000 RPM after an initial detection of more than 11,500 RPM.

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 may cause this DTC to set. Ask the operator if the vehicle was subjected to downhill coasting at an excessive speed.

Repeated drive motor generator operation at speeds in excess of these limits may cause deterioration of the drive motor generator magnets.

Circuit/System Verification

1. Clear the DTC information.
2. Turn the ignition OFF for 1 minute.

Important: This DTC is the result of driving conditions or habits.

3. Operate the vehicle under the conditions for running.
4. Retest for DTCs P1B0D and P1B0E.

^ If 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 after completing the diagnostic procedure. Verification Tests