Power Mirror Tilt Inoperative in Reverse

Power Mirror Tilt Inoperative in Reverse

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 Instructionsprovides an overview of each diagnostic category.

Circuit/System Description

The outside mirror switch and 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 memory seat module through the serial data circuit. When the memory seat module receives switch inputs from the outside mirror switch, mirror output commands are sent to the appropriate switch through the serial data circuit. The outside mirror switch 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 outside mirror switch 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 outside mirror switch and passenger window switch. The switches will then drive the appropriate mirror motors to the commanded position sensor settings.

Diagnostic Aids

Not all vehicles have the Park Tilt Mirror feature, verify that the Park Tilt Mirrors option is available in the DIC Vehicle Customization Feature Setting Menu before attempting diagnosis.

Reference Information
Schematic Reference

Outside Rearview Mirror Schematics Outside Rearview Mirror Schematics
Connector End View Reference

Component Connector End Views Connector Views
Description and Operation

Outside Mirror Description and Operation (Heated Mirrors) Outside Mirror (Heated Mirrors)Outside Mirror Description and Operation (Power Mirrors) Outside Mirror (Power 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 Referencesfor scan tool information

Circuit/System Verification

1. Ignition ON, verify the park assist option is activated in the driver information center (DIC).
2. Select the driver outside mirror, operate mirror in all directions, verify mirror functions properly.

• If the mirror does not function properly, refer to Power Mirror Malfunction Power Mirror Malfunction.

3. Select the passenger outside mirror, operate mirror in all directions, verify mirror functions properly.

• If the mirror does not function properly, refer to Power Mirror Malfunction Power Mirror Malfunction.

4. Verify that mirror positions have been stored in the two vehicle memory features.
5. Operate the memory 1 and 2 recall switches, the outside rearview mirrors should adjust to the stored memory positions.

• If the mirrors do not adjust to the stored positions, refer to Power Mirror Malfunction Power Mirror Malfunction.

6. Park brake on, vehicle running, shift the vehicle in REVERSE, verify that the outside rearview mirrors tilt.

• If the driver outside mirror does not tilt, replace the outside rearview mirror switch.
• If the passenger outside mirror does not tilt, replace the passenger window switch.

7. Park brake on, vehicle running, shift the vehicle in REVERSE, verify that the outside rearview mirrors tilt.

• If the outside mirrors do not tilt, replace the memory seat control module.

Repair Instructions

Perform the Diagnostic Repair Verification Verification Tests after completing the repair.

Control Module References Control Module Referencesfor door lock/window switches and memory seat control module replacement, programming and setup