Drive Motor Generator Power Inverter Module Programming and Setup

Drive Motor Generator Power Inverter Module Programming and Setup

The following service procedures require either a programming or a setup event performed for a complete repair.

PIM Replacement

If the drive motor generator power inverter control module (PIM) assembly is replaced, the following procedures must be performed:

* The PIM Reprogramming-Refer to Service Programming System (SPS) (Programming and Relearning).
* The Theft Deterrent Programming-Refer to Theft Deterrent Control Module Programming and Setup (Programming and Relearning).

PIM Reprogramming

When PIM reprogramming must be performed, refer to Service Programming System (SPS) (Programming and Relearning).

Insure the following conditions exist in order to prepare for PIM programming or reprogramming:

* The battery is fully charged.
* The ignition switch is in the RUN position.
* The Techline equipment cable connection at the data link connector (DLC) is secure.

Program the PIM using the latest software matching the vehicle. Refer to up-to-date Techline equipment user instructions.

If the PIM fails to program, proceed as follows:

* Insure the DLC and PIM connections are good.
* Inspect the Techline equipment for the latest software version.
* Attempt to program the PIM. If the PIM still cannot be programmed properly, replace the PIM.

Setup for Component Replacement

The replacement of some components will require a learn procedure prior to the first drive trip.

If any of the following components are replaced, a Drive Motor Generator Position Sensor Learn Procedure must be performed.

* Transmission assembly
* Drive motor generator 1
* Drive motor generator 2

Drive Motor Generator Position Sensor Learn

Important: Failure to perform the position sensor learn procedure may result in driveability concerns during the first ignition cycle after repair.


The drive motor generator position sensor learn procedure is performed automatically whenever the ignition is turned OFF while high voltage is enabled. The PIM learns the error, or offset, of each position sensor. When a position sensor is replaced, the PIM will not attempt to learn a new offset until the ignition is turned OFF. Driving the vehicle prior to the PIM learning a new offset may result in poor drive motor generator performance until the learn is completed.

Drive Motor Generator Position Sensor Learn Procedure
1. Ignition ON, engine OFF.
2. Observe the battery energy control module (BECM) Contactor System Status display with a scan tool. Insure that the status indicates the high voltage contactor relays are Closed.
3. Turn the ignition OFF and wait 60 seconds. The drive motor generator position sensor learn procedure is complete.