B1D2A-11

B1D2A-11-PASSENGER MIRROR VERTICAL MOTOR CONTROL - CIRCUIT SHORT TO GROUND





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

Theory of Operation

The Mirror Vertical Driver circuit supplies battery voltage for the mirror up position and ground for the mirror down position. The Mirror Common Driver supplies battery voltage for the mirror Down position and ground for the mirror up position.

- When Monitored:
Continuously.

- Set Condition:
When the Passenger Door Module (PDM) senses a short low on the (P72) Passenger Mirror Vertical Driver circuit for more than 10 ms.





1. TEST FOR INTERMITTENT CONDITION
1. Turn the ignition on.
2. With the scan tool, record and erase the Diagnostic Trouble Codes (DTCs).
3. Press and release the Mirror Select switch to select the Passenger Outside Rearview Mirror.
4. Operate the Mirror Adjust switch in all directions several times.
5. Cycle the ignition from on to off three times.
6. Turn the ignition on.
7. With the scan tool, read the DTCs.

Does the scan tool display; B1D2A-11-PASSENGER MIRROR VERTICAL MOTOR CONTROL - CIRCUIT SHORT TO GROUND?

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 (P72) PASSENGER MIRROR VERTICAL DRIVER CIRCUIT FOR A SHORT TO GROUND




1. Turn the ignition off.
2. Disconnect the Passenger Outside Rearview Mirror (Component Side) connector from the PDM C2 harness connector.
3. Measure the resistance of the (P72) Passenger Mirror Vertical Driver circuit between ground and the Passenger Outside Rearview Mirror (Component Side) connector.

Is the resistance below 10k Ohms?

Yes

- Repair the short to ground in the (P72) Passenger Mirror Vertical Driver circuit. If the wiring harness and connector are okay, replace the Passenger Outside Rearview Mirror.Outside Rearview Mirror - Removal.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No, with Heated Mirrors

- Go To 3

No, without Heated Mirrors

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

3. CHECK (P72) PASSENGER MIRROR VERTICAL DRIVER CIRCUIT FOR A SHORT TO THE (C170) PASSENGER MIRROR HEATER RETURN CIRCUIT




1. Measure the resistance between the (P72) Passenger Mirror Vertical Driver circuit and the (C170) Passenger Mirror Heater Return circuit at the Passenger Outside Rearview Mirror (Component Side) connector.

Is the resistance below 10k Ohms?

Yes

- Repair the (P72) Passenger Mirror Vertical Driver circuit for a short to the (C170) Passenger Mirror Heater Return circuit. If the wiring harness and connector are okay, replace the Passenger Outside Rearview Mirror. Outside Rearview Mirror - Removal.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

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