Driver Door Module (DDM, DMFL/R)

B173D-11-MIRROR SIGNAL LAMP 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 Mirror Turn Signal Driver circuit for more than two seconds with the turn signal switched on.





Diagnostic Test

1. TEST FOR INTERMITTENT CONDITION
1. Turn the ignition on.
2. With the scan tool, record and erase the DTCs.
3. Turn the drivers side turn signal on.
4. Turn the park lamps on.
5. Turn the rear defogger on, if equipped with heated mirror.
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 DTCs.

Does the scan tool display: B173D-11-MIRROR SIGNAL LAMP CONTROL - CIRCUIT SHORT TO GROUND?

Yes

- Go To 2

No

- Test complete, the condition or conditions that originally set this DTC are not present at this time. For vehicle's equipped with folding outside rearview mirrors, repeat the above test with the mirror folded. If this DTC is now active, Go To 2. Otherwise, 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. INSPECT MIRROR CONNECTIONS
1. Turn the ignition off.
2. Disconnect the Driver Outside Rearview Mirror C1 and C2 connectors at the Drivers Door Module.
3. Inspect the wiring harness, connectors and the Drivers Door Module.

Were there any problems found?

Yes

- Repair as necessary.
- Perform the BODY VERIFICATION TEST. Body Verification Test

No

- Go To 3

3. MIRROR OR MODULE
1. Turn the ignition on.
2. With the scan tool, record and erase DTCs.
3. Turn the drivers side turn signal on.
4. Fold And Unfold the mirrors several time, if equipped with folding mirrors.
5. Turn the rear defogger on, if equipped with heated mirror.
6. Turn the park lamps on.
7. Press and release the Mirror Select switch to select the Driver Outside Rearview Mirror.
8. 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.

9. With the scan tool, read DTCs. NOTE: Check for a change in DTCs.

Does the scan tool display: B173D-13-MIRROR SIGNAL LAMP CONTROL - CIRCUIT OPEN as active?

Yes

- With the circuit now OPEN that indicates the short is NOT in the Module. Replace the mirror. Service and Repair
- Perform the BODY VERIFICATION TEST. Body Verification Test

No

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