Power Mirror Malfunction (with A45)
Power Mirror Malfunction (with A45)
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 is a multiplex switch which signals the left mirror control module which Outside Rearview Mirror to move (driver or passenger) and which direction to move it. The left 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 left mirror control module. When the memory seat module receives the switch inputs from the left mirror control module, mirror output commands are sent to the appropriate module/switch through the serial data circuit. The left 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 left 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 left mirror control module and passenger window switch. The switches will then drive the appropriate mirror motors to the commanded position sensor settings.
Reference Information
Schematic Reference
Outside Rearview Mirror Schematics Outside Rearview Mirror Schematics
Connector End View Reference
Component Connector End Views Fuel Pump and Level Sensor Assembly
Description and Operation
Outside Mirror Description and Operation (without A45) Outside Mirror (without A45)Outside Mirror Description and Operation (with A45) Outside Mirror Description and Operation (with A45)
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 scan tool Select Switch parameter changes between Left, Right, and None when cycling the S52 Outside Rearview Mirror Switch between the left, right, and none positions.
• If the parameter does not cycle between the specified values
Refer to Circuit/System Testing - Mirror Switch Circuit Test.
• If the parameter does cycle between the specified values
3. Verify the scan tool Mirror Direction Command parameter changes between Up/Down and Right/Left while cycling the S52 Outside Rearview Mirror Switch Up/Down and Right/Left.
• If the parameter does not cycle between the specified values
Refer to Circuit/System Testing - Mirror Switch Circuit Test.
• If the parameter does cycle between the specified values
4. Verify the scan tool Mirror Vertical and Horizontal Position parameters are between 0.2-4.8 V.
• If the parameters are not between 0.2-4.8 V
Refer to Circuit/System Testing - Mirror Position Sensor Circuit Test.
• If the parameters are between 0.2-4.8 V
5. Verify the mirrors move in the commanded direction when commanding the UP/DOWN and RIGHT/LEFT states with a scan tool.
• If a mirror does not move in all the commanded directions
Refer to Circuit/System Testing - Mirror Motor Circuit Test.
• If both mirrors move in all commanded directions
6. Verify the outside rearview mirrors adjust to the stored memory positions when operating the memory 1 and 2 recall switches.
• If a mirror does not adjust to the stored memory position
Refer to Memory Seat Feature Malfunction Memory Seat Feature Malfunction
• If both mirrors adjust to the stored memory positions
7. All OK.
Circuit/System Testing
Mirror Switch Circuit Test
1. Ignition OFF, disconnect the harness connector at the S52 Outside Rearview Mirror Switch. It may take up to 2 minutes for all vehicle systems to power down.
2. Test for less than 10 ohms between the low reference circuit terminal 11 and ground.
• If 10 ohms or greater
1. Ignition OFF, disconnect the harness connector at the K96 Mirror Control Module.
2. Test for less than 2 ohms in the low reference circuit end to end.
• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, replace the K96 Mirror Control Module.
• If less than 10 ohms
3. Ignition ON.
4. Test for 4.8-5.2 V between the signal circuit terminal 5 and ground.
• If less than 4.8 V
1. Ignition OFF, disconnect the harness connector at the K96 Mirror Control Module.
2. Test for infinite resistance between the signal circuit and ground.
• If less than infinite resistance, repair the short to ground on the circuit.
• If infinite resistance
3. Test for less than 2 ohms in the signal circuit end to end.
• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, replace the K96 Mirror Control Module.
• If greater than 5.2 V
1. Ignition OFF, disconnect the harness connector at the K96 Mirror Control Module.
2. Test for less than 1 V between the signal circuit and ground.
• If 1 V or greater, repair the short to voltage on the circuit.
• If less than 1 V, replace the K96 Mirror Control Module.
• If between 4.8 - 5.2 V
5. Test for 4.8-5.2 V between the signal circuit terminal 12 and ground.
• If less than 4.8 V
1. Ignition OFF, disconnect the harness connector at the K96 Mirror Control Module.
2. Test for infinite resistance between the signal circuit and ground.
• If less than infinite resistance, repair the short to ground on the circuit.
• If infinite resistance
3. Test for less than 2 ohms in the signal circuit end to end.
• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, replace the K96 Mirror Control Module.
• If greater than 5.2 V
1. Ignition OFF, disconnect the harness connector at the K96 Mirror Control Module.
2. Test for less than 1 V between the signal circuit and ground.
• If 1 V or greater, repair the short to voltage on the circuit.
• If less than 1 V, replace the K96 Mirror Control Module.
• If between 4.8 - 5.2 V
6. Replace S52 Outside Rearview Mirror Switch.
Mirror Motor Circuit Test
1. Ignition OFF, disconnect the harness connector at the appropriate A9 Outside Rearview Mirror, ignition ON.
2. Connect a test lamp between the control circuit terminal 1 and control circuit terminal 2.
3. Verify the test lamp illuminates when commanding the UP/DOWN states with the scan tool.
• If the test lamp remains off during either of the commands
1. Ignition OFF, disconnect the harness connector at the K96 Mirror Control Module (driver mirror) or S79P Window Switch - Passenger (passenger mirror).
2. Test for less than 1 V between each of control circuit and ground.
• If 1 V or greater, repair the short to voltage on the circuit.
• If less than 1 V
3. Test for infinite resistance between each control circuit and ground.
• If less than infinite resistance, repair the short to ground on the circuit.
• If infinite resistance
4. Test for less than 2 ohms in each control circuit end to end.
• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, replace the appropriate module or switch.
• If the test lamp illuminates during each of the commands
4. Connect a test lamp between the control circuit terminal 1 and the control circuit terminal 3.
5. Verify the test lamp illuminates when commanding the LEFT/RIGHT states with the scan tool.
• If the test lamp does not illuminate during either of the commands
1. Ignition OFF, disconnect the harness connector at the K96 Mirror Control Module (driver mirror) or S79P Window Switch - Passenger (passenger mirror).
2. Test for less than 1 V between each control circuit and ground.
• If 1 V or greater, repair the short to voltage on the circuit.
• If less than 1 V
3. Test for infinite resistance between each control circuit and ground.
• If less than infinite resistance, repair the short to ground on the circuit.
• If infinite resistance
4. Test for less than 2 ohms in each control circuit end to end.
• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, replace the appropriate module or switch.
• If the test lamp illuminates during each of the commands
6. Test or replace the M77 Outside Rearview Mirror Motor.
Mirror Position Sensor Circuit Test
1. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the appropriate A9 Outside Rearview Mirror. It may take up to 2 minutes for all vehicle systems to power down.
2. Test for less than 10 ohms between the low reference circuit terminal 14 and ground.
• If 10 ohms or greater
1. Ignition OFF, disconnect the harness connector at the K96 Mirror Control Module (driver mirror) or S79P Window Switch - Passenger (passenger mirror).
2. Test for less than 2 ohms in the low reference circuit end to end.
• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, replace the module or switch.
• If less than 10 ohms
3. Ignition ON.
4. Test for 4.8-5.2 V between the 5 V reference circuit terminal 12 and ground.
• If less than 4.8 V
1. Ignition OFF, disconnect the harness connector at the K96 Mirror Control Module (driver mirror) or S79P Window Switch - Passenger (passenger mirror).
2. Test for infinite resistance between the 5 V reference circuit and ground.
• If less than infinite resistance, repair the short to ground on the circuit.
• If infinite resistance
3. Test for less than 2 ohms in the 5 V reference circuit end to end.
• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, replace the module or switch.
• If greater than 5.2 V
1. Ignition OFF, disconnect the harness connector at the K96 Mirror Control Module (driver mirror) or S79P Window Switch - Passenger (passenger mirror).
2. Test for less than 1 V between the 5 V reference circuit and ground.
• If 1 V or greater, repair the short to voltage on the circuit.
• If less than 1 V, replace the module or switch.
• If between 4.8 - 5.2 V
5. Install a 3 A fused jumper wire at the signal circuit terminal 11.
6. Verify the scan tool Mirror Vertical Position parameter changes between less than 0.2 V and greater than 4.8 V when moving the jumper wire between the low reference circuit terminal 14 and the 5 V reference circuit terminal 12.
• If the Mirror Vertical Position parameter does not change
1. Ignition OFF, disconnect the harness connector at the K96 Mirror Control Module (driver mirror) or S79P Window Switch - Passenger (passenger mirror), ignition ON.
2. Test for less than 1 V between the signal circuit terminal 11 and ground.
• If 1 V or greater, repair the short to voltage on the circuit.
• If less than 1 V
3. Ignition OFF
4. Test for infinite resistance between the signal circuit terminal 11 and ground.
• If less than infinite resistance, repair the short to ground on the circuit.
• If infinite resistance
5. Test for less than 2 ohms in the signal circuit end to end.
• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, replace the K96 Mirror Control Module (driver mirror) or S79P Window Switch - Passenger (passenger mirror).
• If the Mirror Vertical Position parameter changes
7. Install a 3 A fused jumper wire at the signal circuit terminal 13.
8. Verify the scan tool Mirror Horizontal Position parameter changes between less than 0.2 V and greater than 4.8 V when moving the jumper wire between the low reference circuit terminal 14 and the 5 V reference circuit terminal 12.
• If the Mirror Horizontal Position parameter does not change
1. Ignition OFF, disconnect the harness connector at the K96 Mirror Control Module (driver mirror) or S79P Window Switch - Passenger (passenger mirror), ignition ON.
2. Test for less than 1 V between the signal circuit terminal 13 and ground.
• If 1 V or greater, repair the short to voltage on the circuit.
• If less than 1 V
3. Ignition OFF
4. Test for infinite resistance between the signal circuit terminal 13 and ground.
• If less than infinite resistance, repair the short to ground on the circuit.
• If infinite resistance
5. Test for less than 2 ohms in the signal circuit end to end.
• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, replace the K96 Mirror Control Module (driver mirror) or S79P Window Switch - Passenger (passenger mirror).
• If the Mirror Horizontal Position parameter changes
9. Test or replace the M77 Outside Rearview Mirror Motor
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the repair.
* Outside Rearview Mirror Folding Control Module Replacement Service and Repair
* Outside Rearview Mirror Inner Actuator Replacement Outside Rearview Mirror Inner Actuator Replacement
* Outside Remote Control Rearview Mirror Switch Replacement Service and Repair
* Control Module References Control Module References for module replacement, programming and setup.