Driver Door Module (DDM)

B2851-11-DRIVER MIRROR APPROACH LIGHT CONTROL - CIRCUIT SHORT TO GROUND





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

- When Monitored:
Continuously.

- Set Condition:
The Door Module senses a short low on the (P551) Driver Approach Lamp Driver circuit for more than two seconds with the approach lights switched on.





1. TEST FOR INTERMITTENT CONDITION
1. Turn the ignition on.
2. Using a scan tool, record and erase Diagnostic Trouble Codes (DTCs).
3. Turn the driver turn signal on.
4. Turn the approach lamps on.
5. Turn the rear defogger on.
6. Press and release the Mirror Select switch to select the Driver Outside Rearview Mirror.
7. Operate the Mirror Adjust switch in all directions several times while monitoring the scan tool for DTCs.

Note: After adjusting the mirror in one direction wait at least two seconds before adjusting the mirror in the opposite direction, as this will allow time for an active fault to set if present.

8. With the scan tool, read the active DTCs.

Does the scan tool display: B2851-11-DRIVER MIRROR APPROACH LAMP CONTROL - CIRCUIT SHORT TO GROUND as active?

Yes

- Go To 2

No

- The conditions that caused this code to set are not present at this time. For vehicle's equipped with folding outside rearview mirrors, repeat test with mirror folded. If DTC is now active, Go To 2. Otherwise, use the wiring diagram/schematic as a guide and inspect the wiring and connectors.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

2. CHECK (P551) DRIVER MIRROR APPROACH LAMP DRIVER CIRCUIT FOR A SHORT TO GROUND




1. Turn the ignition off.
2. Disconnect the Driver Outside Rearview Mirror C1 and C2 (Component Side) harness connectors from the Door Module.
3. Measure the resistance between ground and the (P551) Driver Approach Lamp Driver circuit at the Driver Outside Rearview Mirror C1 (Component Side) connector.

Is the resistance below 10K Ohms?

Yes

- Repair the (P551) Driver Approach Lamp Driver circuit for a short to ground. If the wiring harness and connector are okay, replace the Driver Outside Rearview Mirror. Outside Rearview Mirror - Removal.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Go To 3

3. CHECK (P551) DRIVER MIRROR APPROACH LAMP DRIVER CIRCUIT FOR A SHORT TO THE (P552) DRIVER BLIND SPOT/APPROACH RETURN CIRCUIT




1. Measure the resistance between the (P551) Driver Approach Lamp Driver circuit and the (P552) Driver Blind Spot/Approach Return circuit at the Driver Outside Rearview Mirror C1 (Component Side) harness connector.

Is the resistance below 2.0 Ohm?

Yes

- Repair the (P551) Driver Approach Lamp Driver circuit for a short to the (P552) Driver Blind Spot/Approach Return circuit. If the wiring harness and connector are okay, replace the Driver Outside Rearview Mirror. Outside Rearview Mirror - Removal.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Go To 4

4. CHECK (P551) DRIVER MIRROR APPROACH LAMP DRIVER CIRCUIT FOR A SHORT TO ANY DRIVER MIRROR GROUND OR RETURN CIRCUIT




1. Measure the resistance between the (P551) Driver Approach Lamp Driver circuit (C1-1) and each of the Driver Mirror Driver circuits in the Driver Outside Rearview Mirror C2 (Component Side) connector.

Is the resistance below 10K Ohms for any measurement?

Yes

- Repair all circuits with a resistance below 10K Ohms for a short to the (P551) Driver Approach Lamp Driver circuit. If the wiring harness and connector are okay, replace the Driver Outside Rearview Mirror. Outside Rearview Mirror - Removal.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Inspect the wiring and connectors for damage and repair as necessary. If the wiring and connectors are okay, replace the Door Module. Door Module - Removal.
- Perform the BODY VERIFICATION TEST. Body Verification Test.