• 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 provides an overview of each diagnostic category.

The outside rearview mirror switch is a multiplex switch which signals the mirror control module which outside rearview mirror to move (driver or passenger) and which direction to move it. The mirror control module and the passenger window switch are on a serial data circuit with the memory seat module as the master. The mirror select and directional control switches are inputs to the mirror control module. When the memory seat module receives the switch inputs from the mirror control module, mirror output commands are sent to the appropriate module/switch through the serial data circuit. The mirror control module and passenger window switch control the left and right outside rear view mirrors through bi-directional motor control circuits. The motor control circuits are floating while in an inactive state and the switches will apply power and ground to the control circuits as necessary to move the mirror in the commanded direction.

Mirror position is determined by both horizontal and vertical position sensors in each of the power mirrors. The mirror control module and passenger window switch supply a 5 V reference, low reference, and horizontal and vertical position signal circuits to these sensors. The signal circuits are referenced from 5 V by the switches and the signal circuit voltage levels represent the mirror positions. The mirror positions are sent to the memory seat module through the serial data circuit where they are stored for memory mirror operation. When the memory seat module receives a memory recall command, the memory seat module will send the go to position commands to the mirror control module and passenger window switch. The switches will then drive the appropriate mirror motors to the commanded position sensor settings.

Battery voltage must be between 9–16 V.

An internal malfunction has been detected by the mirror control module while commanding the driver outside rearview mirror UP, DOWN, LEFT or RIGHT.

An internal malfunction has been detected by the passenger window switch while commanding the passenger outside rearview mirror UP, DOWN, LEFT or RIGHT.

The affected outside rearview mirror will be inoperative.

The driver outside rearview mirror must be replaced before the DTC can be cleared.

The passenger outside rearview mirror must be replaced before the DTC can be cleared.

Outside Rearview Mirror Schematics

Master Electrical Component List

Outside Mirror Description and Operation

• Circuit Testing
• Connector Repairs
• Testing for Intermittent Conditions and Poor Connections
• Wiring Repairs

Control Module References for scan tool information

1. Ignition ON.
2. Verify the A9A Outside Rearview Mirror—Driver moves when commanding the Driver Mirror Horizontal Movement Right/Left and Driver Mirror Vertical Movement Up/Down with a scan tool.
• If the A9A Outside Rearview Mirror—Driver does not move RIGHT or LEFT or UP or DOWN

  Replace the M77D Outside Rearview Mirror Motor—Driver.

• If the A9A Outside Rearview Mirror-Driver moves RIGHT, LEFT, UP and DOWN
3. Verify the A9B Outside Rearview Mirror-Passenger moves when commanding the Passenger Mirror Horizontal Movement Right/Left and Passenger Mirror Vertical Movement Up/Down with a scan tool.
• If the A9B Outside Rearview Mirror-Passenger does not move RIGHT or LEFT or UP or DOWN

  Replace the M77P Outside Rearview Mirror Motor—Passenger.

• If the A9B Outside Rearview Mirror-Passenger moves RIGHT, LEFT, UP and DOWN
4. All OK.

Perform the Diagnostic Repair Verification after completing the repair.

Outside Rearview Mirror Actuator Replacement