Power Mirror Folding Malfunction (With A45)

Power Mirror Folding Malfunction (with A45)

Diagnostic Instructions
- Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
- Review Strategy Based Diagnosis for an overview of the diagnostic approach.
- Diagnostic Procedure Instructions has overviews of all diagnostic categories.

Diagnostic Fault Information







Circuit/System Description
The mirror select and fold/unfold switches are inputs to the memory seat module through a serial data circuit. When the memory seat module receives a fold/unfold signal from the outside mirror switch the memory seat module will send a fold or unfold command to the outside mirror switch and passenger window switch. The outside mirror switch and passenger window switch control the fold/unfold motors through bi-directional control circuits.

Reference Information

Schematic Reference
Outside Rearview Mirror Schematics

Connector End View Reference
Component Connector End Views

Description and Operation
Outside Mirror Description and Operation (with A45) Outside Mirror Description and Operation (w/o A45)

Electrical Information Reference
- Circuit Testing
- Connector Repairs
- Testing for Intermittent Conditions and Poor Connections
- Wiring Repairs

Scan Tool Reference
Control Module References for information on diagnostic tools

Circuit/System Verification
1. Observe the scan tool Mirror Select Switch parameter while you move the switch between left, right and neutral/fold. The reading should change between Left, Right, and Neutral/Fold.
2. If the reading does not change between the specified values replace the S52 outside mirror switch.
3. Command the driver and passenger mirrors to Fold and Unfold with a scan tool. Both mirrors should move in the commanded direction.

Circuit/System Testing
1. Ignition OFF, disconnect the harness connector at the appropriate A9 outside rearview mirror.
2. Connect a test lamp between the control circuit terminal 9 and the control circuit terminal 10.
3. Command the driver and passenger mirrors to Fold and Unfold with a scan tool. The test lamp should turn ON when commanding the fold and unfold states.
4. If the test lamp remains OFF during either of the commands, test for a short to voltage, short to ground, or an open/high resistance on either control circuit. If the circuits test normal, replace the appropriate switch.
- S52 outside mirror switch
- S79P passenger window switch

5. If all circuits test normal, test or replace the A9 outside rearview mirror.

Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
- Outside Remote Control Rearview Mirror Switch Replacement
- Outside Rearview Mirror Replacement.