Diagnostic Routine AG

Diagnostic Routine AG

Diagnostic Overview

U0202:87

Normal Operation and Fault Conditions

The PRDM (Passenger Rear Door Module) communicates with the PDM (Passenger Door Module) over a dedicated LIN (Local Interconnect Network).

In the event of a failure on the LIN (Local Interconnect Network) that causes the PDM (Passenger Door Module) to not communicate with the PRDM (Passenger Rear Door Module), the power windows, power locks and switch illumination will be inoperative in the rear door.

DTC Fault Trigger Conditions






Pinpoint Test

1. RETRIEVE THE DTCs (Diagnostic Trouble Codes) IN THE PDM (Passenger Door Module)

1. Ignition ON.

2. Using a scan tool, perform the PDM (Passenger Door Module) self-test.

Is DTC (Diagnostic Trouble Code) B1087:83, 86, or 88 retrieved?






2. CHECK THE PRDM (Passenger Rear Door Module) VOLTAGE SUPPLY CIRCUIT FOR AN OPEN

1. Ignition OFF.

2. Disconnect: PRDM (Passenger Rear Door Module).

3. Ignition ON.

4. Measure:





Is the voltage greater than 11 volts?






3. CHECK THE PRDM (Passenger Rear Door Module) GROUND CIRCUIT FOR AN OPEN

1. Ignition OFF.

2. Measure:





Is the resistance less than 3 ohms?






4. CHECK FOR CORRECT PRDM (Passenger Rear Door Module) OPERATION

1. Ignition OFF.

2. Disconnect and inspect the PRDM (Passenger Rear Door Module) connector.

3. Repair:

- corrosion (install new connector or terminals- clean module pins)
- damaged or bent pins- install new terminals/pins
- pushed-out pins- install new pins as necessary

4. Reconnect the PRDM (Passenger Rear Door Module) connector. Make sure it seats and latches correctly.

5. Operate the system and determine if the concern is still present.

Is the concern still present?