GM Service Manual Online
For 1990-2009 cars only

The Driver Door Module (DDM) and Passenger Door Module (PDM) scan tool data definitions are a brief description of each of the vehicle access related parameters displayed within the scan tool data display for the DDM/PDM.

Base Software P/N: This is the part number stored within the DDM/PDM of the base software set required to activate the PDM. This software set is often referred to as boot software.

Base Software Suffix: This suffix number is the stored indication of the revision level of the base software.

Battery 1 (Low Current): The battery 1 (low current) parameter provides the voltage level on the battery 1 input. Battery 1 is the low current input provides the power for the DDM/PDM's microprocessors and the low current outputs.

Battery 2 (High Current): The battery 2 (high current) parameter provides the voltage level on the battery 2 input. Battery 2 is the high current input provides the power for the DDM/PDM's high current outputs.

Calibration P/N: This is the part number stored within the DDM/PDM of the calibration set. The calibration software sets the operational ranges and option levels for each of the DDM/PDM's functions. This software set is often referred to as calibration software or calibration.

Calibration Suffix: This suffix number is the stored indication of the revision level of the calibration. This is often referred to as the CAL ID.

Door Ajar Switch: This parameter reflects the current status of the door ajar switch input to the DDM/PDM.

Door Lock Motor: This parameter indicates the current status of the door lock motor.

Door Lock Switch: This parameter indicates the current status of the door lock switch.

Program Software P/N: This is the part number stored indication of the revision level of the program software.

Program Software Suffix: This suffix number is the stored indication of the revision level of the program software.

The Body Control Module (BCM) scan tool data definitions are a brief description of each of the vehicle access related parameters displayed within the scan tool data display for the BCM.

Left Rear Door Ajar Sw.: This parameter indicates the current status of the left rear door ajar switch.

Right Rear Door Ajar Sw.: This parameter indicates the current status of the right rear door ajar switch.

Rear Doors Lock: This parameter indicates the commanded state of the rear door lock relay.

Rear Doors Unlock: This parameter indicates the commanded state of the rear door unlock relay.

The Liftgate Module scan tool data definitions are a brief description of each of the vehicle access related parameters displayed within the scan tool data display for the Liftgate Module.

Liftgate Ajar Switch: This parameter indicates the current status of the liftgate ajar switch.

Lift Glass Ajar Switch: This parameter indicates the current status of the liftgass ajar switch.

Lock Command: The scan tool displays the LGM output state to the lock actuator as Idle/Unlock/Lock.

Requested Lock/Unlock: The scan tool displays the Lock/Unlock input to the LGM.