Power Mirror Malfunction

Power Mirror Malfunction

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.

* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provides an overview of each diagnostic category.

Diagnostic Fault Information






Circuit/System Description

The outside rearview mirror switch supplies both voltage and ground to the outside rearview mirror motors. When the outside rearview mirror switch is being pressed the switch supplies the voltage and ground to the proper circuits to engage the proper mirror motor.

Reference Information

Schematic Reference

Outside Rearview Mirror Schematics Electrical Diagrams

Connector End View Reference

Component Connector End Views 1-2 Shift Solenoid (SS) Valve (M30)

Description and Operation

Outside Mirror Description and Operation (Power Mirrors) Outside Mirror (Power Mirrors)Outside Mirror Description and Operation (Heated Mirrors) Outside Mirror (Heated Mirrors)

Electrical Information Reference

* Circuit Testing Circuit Testing

* Connector Repairs Connector Repairs

* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections

* Wiring Repairs Wiring Repairs

Scan Tool Reference

Control Module References Control Module References for scan tool information

Circuit/System Verification

1. Ignition ON, with the mirror selector switch in the DRIVER position, command the mirrors UP, DOWN, LEFT, and RIGHT using the mirror directional switch. The driver mirror should move in the commanded direction.

2. Ignition ON, with the mirror selector switch in the PASSENGER position, command the mirrors UP, DOWN, LEFT, and RIGHT using the mirror directional switch. The passenger mirror should move in the commanded direction.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the power mirror switch.

2. Test for less than 10 ohms between the ground circuit terminal D and ground.

• If greater than the specified range, test the low reference circuit for an open/high resistance.

3. Ignition ON, verify that a test lamp illuminates between the B+ circuit terminal E and ground.

• If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance. If the circuit tests normal and the B+ circuit fuse is open, test the control circuits for a short to ground.

4. Connect the harness connector at the outside rearview mirror switch.

5. Disconnect the harness connector at the appropriate power mirror.

6. Connect a test lamp between the control circuit terminal F and the control circuit terminal E.

7. Operate the vertical switch UP and DOWN. The test lamp should turn ON when commanding the UP and DOWN states.

• 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 the control circuits. If the circuits test normal, replace the power mirror switch.

8. Connect a test lamp between the control circuit terminal G and the control circuit terminal H.

9. Operate the horizontal switch LEFT and RIGHT. The test lamp should turn ON when commanding the LEFT and RIGHT states.

• 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 the control circuits. If the circuits test normal, replace the power mirror switch.

10. If all circuits test normal, test or replace the power mirror.

Component Testing

Outside Rearview Mirror Switch

1. Ignition OFF, disconnect the harness connector at the outside rearview mirror switch.

2. Test for infinite resistance between all of the control circuit terminals and the B+ and ground circuit terminals with the switch in the open position.

• If less than the specified range, replace the power mirror switch.

3. Test for less than 1 ohms between all of the control terminals and ground terminal with the outside rearview mirror switch in the proper positions.

• If greater than the specified range, test the ground circuit for an open/high resistance. If the circuits test normal, replace the power mirror switch.

Repair Instructions

Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.

* Power Mirror Replacement Power Mirror Replacement

* Power Mirror Switch Replacement Service and Repair