B2852-15

B2852-15-PASSENGER DOOR AMBIENT LAMP CONTROL - CIRCUIT SHORT TO BATTERY OR OPEN





For a complete wiring diagram, refer to the Wiring Information .

Theory of Operation

An ambient lamp can be a: map pocket, door handle, halo ring, cup holder, etc. It is a LED with a built in circuit board. The BCM controls the operation and sends a bus message to the Door Module to turn the lamps on or off.

- When Monitored:
Whenever the ambient lamp is switched on.

- Set Condition:
When the Passenger Door Ambient Lamp Driver circuit is on when it should be off or off when it should be on, for over 2000 ms. and the above conditions are met, this code will set.





1. TEST FOR INTERMITTENT CONDITION

NOTE: Be sure the thumbwheels on the Dimmer Module are turned fully on until instructed to turn them off.

1. Turn the ignition on.
2. With the scan tool, record and erase the DTCs.
3. Cycle the ignition on to off three times.
4. Turn the park lamps on.
5. Wait 30 seconds then turn the ignition on.
6. With the scan tool, read the active DTCs.

Does the scan tool display: B2852-15-PASSENGER DOOR AMBIENT LAMP CONTROL - CIRCUIT SHORT TO BATTERY OR OPEN?

Yes

- Go To 2

No

- Test complete, the condition or conditions that originally set this DTC are not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals and correct pin tension.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

2. (M35) PASSENGER DOOR AMBIENT LAMP DRIVER CIRCUIT SHORTED TO VOLTAGE




1. Turn the ignition off.
2. Remove the inner door panel trim. Front Door Trim Panel - Removal
3. Leave the Passenger Door Map Pocket/Courtesy Lamp connector connected.
4. Disconnect the Passenger Door Module C5 harness connector.
5. Turn the ignition on.
6. Measure the voltage between ground and the (M35) Passenger Door Ambient Lamp Driver circuit in the Passenger Door Module C5 harness connector.

Is there any voltage present?

Yes

- Repair the (M35) Passenger Door Ambient Lamp Driver circuit for a short to voltage.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Go To 3

3. (M35) PASSENGER DOOR AMBIENT LAMP DRIVER CIRCUIT OPEN




1. Turn the ignition off.
2. Be sure the Passenger Door Map Pocket/Courtesy Lamp connector is still connected.
3. Turn the ignition on.
4. Connect a fused jumper wire to the (M35) Passenger Door Ambient Lamp Driver circuit in the PDM C5 harness connector.
5. Connect a jumper wire to the (M36) Passenger Door Lighting Return circuit in the PDM C5 harness connector.

Does the Passenger Door Ambient Lamp illuminate brightly?

Yes

- Replace the Passenger Door Module. Door Module - Removal.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Go To 4

4. (M35) PASSENGER DOOR AMBIENT LAMP DRIVER CIRCUIT OPEN




1. Disconnect the Passenger Door Map Pocket/Courtesy Lamp harness connector.
2. Measure the resistance of the (M35) Passenger Door Ambient Lamp Driver circuit between the PDM C5 harness connector and the Passenger Door Map Pocket/Courtesy Lamp harness connector.

Is the resistance below 2.0 Ohms?

Yes

- Go To 5

No

- Repair the open in the (M35) Passenger Door Courtesy Lamp Driver circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

5. (M36) PASSENGER DOOR LIGHTING RETURN CIRCUIT OPEN




1. Measure the resistance of the (M36) Passenger Door Lighting Return circuit between the PDM C5 harness connector and the Passenger Door Map Pocket/Courtesy Lamp harness connector.

Is the resistance below 2.0 Ohms?

Yes

- Replace the Passenger Door Ambient Lamp.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Repair the open in the (M36) Passenger Door Lighting Return circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.