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 Instructions provides 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 End Views By Name
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.
2. Verify the park assist option is activated in the driver information center (DIC).
3. Select the driver outside mirror on S52 Outside Rearview Mirror Switch.
4. Verify mirror functions properly when operating the S52 Outside Rearview Mirror Switch in UP/DOWN and LEFT/RIGHT positions.
• If the mirror does not function properly
Refer to Power Mirror Malfunction Power Mirror Malfunction.
• If the mirror functions properly
5. Select the passenger outside mirror on S52 Outside Rearview Mirror Switch.
6. Verify mirror functions properly when operating the S52 Outside Rearview Mirror Switch in UP/DOWN and LEFT/RIGHT positions.
• If the mirror does not function properly
Refer to Power Mirror Malfunction Power Mirror Malfunction.
• If the mirror functions properly
7. Operate the memory 1 and 2 recall switches on S47D Seat Memory Switch - Driver.
8. Verify the outside rearview mirrors adjust to the stored memory positions.
• If the mirrors do not adjust to the stored positions
Refer to Power Mirror Malfunction Power Mirror Malfunction.
• If the mirrors adjust to the stored positions
9. Park brake on, vehicle running, shift the vehicle in REVERSE.
10. Verify that the outside rearview mirrors tilt.
• If the driver outside mirror does not tilt
1. Ignition OFF.
2. Replace the S52 Outside Rearview Mirror Switch.
3. Park brake on, vehicle running, shift the vehicle in REVERSE.
4. Verify the driver mirror tilts.
• If the mirror does not tilt, replace the K40 Memory Seat Module.
• If the mirror tilts
5. All OK.
• If the passenger outside mirror does not tilt
1. Ignition OFF.
2. Replace the S79P Passenger Window Switch.
3. Park brake on, vehicle running, shift the vehicle in REVERSE.
4. Verify the driver mirror tilts.
• If the mirror does not tilt, replace the K40 Memory Seat Control Module.
• If the mirror tilts
5. All OK.
• If the mirrors tilt
11. All OK.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the repair.
Control Module References Control Module References for door lock/window switches and memory seat control module replacement, programming and setup