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 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.
Reference Information
Schematic Reference
Outside Rearview Mirror Schematics Outside Rearview Mirror Schematics
Connector End View Reference
Component Connector End Views Sunshade - Left
Description and Operation
Outside Mirror Description and Operation (with A45) Outside Mirror Description and Operation (with A45)Outside Mirror Description and Operation (without A45) Outside Mirror (without 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 Mirror Select Switch parameter changes from None to Left and Right when cycling the S52 Outside Rearview Mirror Switch.
• If the parameter does not change
Refer to Circuit/System Testing - Outside Rearview Mirror Switch Malfunction.
• If the parameter changes
3. Verify the scan tool Mirror Direction Switch parameter changes from Inactive to Up, Down, Right and Left when cycling the S52 Outside Rearview Mirror Switch.
• If the parameter does not change
Refer to Circuit/System Testing - Outside Rearview Mirror Switch Malfunction.
• If the parameter changes
4. 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
Refer to Circuit/System Testing - Driver Outside Mirror Movement Malfunction.
• If the A9A Outside Rearview Mirror-Driver moves RIGHT, LEFT, UP and DOWN
5. Verify the scan tool Driver Mirror Vertical Position parameters are between 0.2-4.8 V and change when commanding the Driver Mirror Vertical Movement Up/Down with a scan tool.
• If not between 0.2-4.8 V or does not change
Refer to Circuit/System Testing - Driver Mirror Position Sensor Circuit Test.
• If between 0.2-4.8 V and changes
6. Verify the scan tool Driver Mirror Horizontal Position parameters are between 0.2-4.8 V and change when commanding the Driver Mirror Horizontal Movement Right/Left with a scan tool.
• If not between 0.2-4.8 V or does not change
Refer to Circuit/System Testing - Driver Mirror Position Sensor Circuit Test.
• If between 0.2-4.8 V and changes
7. 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
Refer to Circuit/System Testing - Passenger Outside Mirror Movement Malfunction.
• If the A9B Outside Rearview Mirror-Passenger moves RIGHT, LEFT, UP and DOWN
8. Verify the scan tool Passenger Mirror Vertical Position parameters are between 0.2-4.8 V and change while commanding the Passenger Mirror Horizontal Movement Right/Left with a scan tool.
• If not between 0.2-4.8 V or does not change
Refer to Circuit/System Testing - Passenger Mirror Position Sensor Circuit Test.
• If between 0.2-4.8 V and changes
9. Verify the scan tool Passenger Mirror Horizontal Position parameters are between 0.2-4.8 V and change while commanding the Passenger Mirror Vertical Movement Up/Down with a scan tool.
• If not between 0.2-4.8 V or does not change
Refer to Circuit/System Testing - Passenger Mirror Position Sensor Circuit Test.
• If between 0.2-4.8 V and changes
10. All OK.
Circuit/System Testing
Outside Rearview Mirror Switch Malfunction
1. Ignition OFF and all vehicle systems 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 ground circuit terminal 5 and ground.
• If 10 ohms or greater
1. Ignition OFF.
2. Test for less than 2 ohms in the ground circuit end to end.
• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, repair the open/high resistance in the ground connection.
• If less than 10 ohms
3. Verify a test lamp illuminates between the B+ circuit terminal 4 and ground.
• If the test lamp does not illuminate and the circuit fuse is good
1. Ignition OFF, remove the test lamp.
2. Test for less than 2 ohms in the ignition circuit end to end.
• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, verify the fuse is not open and there is voltage at the fuse.
• If the test lamp does not illuminate and the circuit fuse is open
1. Ignition OFF, remove the test lamp.
2. Test for infinite resistance between the B+ circuit and ground.
• If less than infinite resistance, repair the short to ground on the circuit.
• If infinite resistance
3. 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, replace the S52 Outside Rearview Mirror Switch
• If the test lamp illuminates
4. Test or replace the S52 Outside Rearview Mirror Switch.
Driver Outside Mirror Movement Malfunction
1. Ignition OFF, disconnect the X510 inline harness connector at the A9A Outside Rearview Mirror-Driver. Ignition ON
2. Connect a test lamp between the control circuit terminal 1 and control circuit terminal 2.
3. Verify the test lamp turns ON when commanding the Up and Down states with a scan tool.
• If the test lamp remains OFF during either of the commands
1. Ignition OFF, remove the test lamp, disconnect the harness connector at the S52 Outside Rearview Mirror Switch.
2. 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
3. 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 S52 Outside Rearview Mirror Switch.
• If the test lamp is always ON
1. Ignition OFF, remove the test lamp, disconnect the harness connector at the S52 Outside Rearview Mirror Switch, ignition ON.
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, replace the S52 Outside Rearview Mirror Switch
• If the test lamp turns ON during each of the commands
4. Connect a test lamp between the control circuit terminal 1 and control circuit terminal 3.
5. Verify the test lamp turns ON when commanding the Left and Right states with a scan tool.
• If the test lamp remains OFF during either of the commands
1. Ignition OFF, remove the test lamp, disconnect the harness connector at the S52 Outside Rearview Mirror Switch.
2. 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
3. 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 S52 Outside Rearview Mirror Switch.
• If the test lamp is always ON
1. Ignition OFF, remove the test lamp, disconnect the harness connector at the S52 Outside Rearview Mirror Switch, ignition ON.
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, replace the S52 Outside Rearview Mirror Switch
• If the test lamp turns ON during each of the commands
6. Test or replace the M77D Outside Rearview Mirror Motor-Driver.
Driver Mirror Position Sensor Circuit Test
1. Ignition OFF and all vehicle systems OFF, disconnect the X510 inline harness connector at the A9A Outside Rearview Mirror-Driver. 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 S52 Outside Rearview Mirror Switch.
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 S52 Outside Rearview Mirror 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 S52 Outside Rearview Mirror Switch.
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 S52 Outside Rearview Mirror Switch.
• If greater than 5.2 V
1. Ignition OFF, disconnect the harness connector at the S52 Outside Rearview Mirror Switch, ignition ON.
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 S52 Outside Rearview Mirror Switch.
• If between 4.8-5.2 V
5. Verify the scan tool Driver Mirror Vertical Position parameter is less than 4.6 V.
• If 4.6 V or greater
1. Ignition OFF, disconnect the harness connector at the S52 Outside Rearview Mirror Switch, 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, replace the S52 Outside Rearview Mirror Switch.
• If less than 4.6 V
6. Install a 3 A fused jumper wire between the signal circuit terminal 11 and the 5 V reference circuit terminal 12.
7. Verify the scan tool Driver Mirror Vertical Position or the parameter is greater than 0.6 V.
• If 0.6 V or less
1. Ignition OFF, remove the jumper wire, disconnect the harness connector at the S52 Outside Rearview Mirror Switch.
2. 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
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 S52 Outside Rearview Mirror Switch.
• If greater than 0.6 V
8. Verify the scan tool Driver Mirror Horizontal Position parameter is less than 4.6 V.
• If 4.6 V or greater
1. Ignition OFF, disconnect the harness connector at the S52 Outside Rearview Mirror Switch, 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, replace the S52 Outside Rearview Mirror Switch.
• If less than 4.6 V
9. Install a 3 A fused jumper wire between the signal circuit terminal 13 and the 5 V reference circuit terminal 12.
10. Verify the scan tool Driver Mirror Horizontal Position or the parameter is greater than 0.6 V.
• If 0.6 V or less
1. Ignition OFF, remove the jumper wire, disconnect the harness connector at the S52 Outside Rearview Mirror Switch.
2. 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
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 S52 Outside Rearview Mirror Switch.
• If greater than 0.6 V
11. Test or replace the M77D Outside Rearview Mirror Motor-Driver.
Passenger Outside Mirror Movement Malfunction
1. Ignition OFF, disconnect the X610 inline harness connector at the A9B Outside Rearview Mirror-Passenger. Ignition ON
2. Connect a test lamp between the control circuit terminal 1 and control circuit terminal 2.
3. Verify the test lamp turns ON when commanding the Up and Down states with a scan tool.
• If the test lamp remains OFF during either of the commands
1. Ignition OFF, remove the test lamp, disconnect the X2 harness connector at the S79P Window Switch-Passenger.
2. 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
3. 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 S79P Window Switch-Passenger.
• If the test lamp is always ON
1. Ignition OFF, remove the test lamp, disconnect the X2 harness connector at the S79P Window Switch-Passenger, ignition ON.
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, replace the S79P Window Switch-Passenger
• If the test lamp turns ON during each of the commands
4. Connect a test lamp between the control circuit terminal 1 and control circuit terminal 3.
5. Verify the test lamp turns ON when commanding the Left and Right states with a scan tool.
• If the test lamp remains OFF during either of the commands
1. Ignition OFF, remove the test lamp, disconnect the X2 harness connector at the S79P Window Switch-Passenger.
2. 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
3. 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 S79P Window Switch-Passenger.
• If the test lamp is always ON
1. Ignition OFF, remove the test lamp, disconnect the X2 harness connector at the S79P Window Switch-Passenger, ignition ON.
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, replace the S79P Window Switch-Passenger
• If the test lamp turns ON during each of the commands
6. Test or replace the M77P Outside Rearview Mirror Motor-Passenger.
Passenger Mirror Position Sensor Circuit Test
1. Ignition OFF and all vehicle systems OFF, disconnect the X610 inline harness connector at the A9B Outside Rearview Mirror-Passenger. 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 X2 harness connector at the S79P Window Switch-Passenger.
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 S79P Window Switch-Passenger.
• 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 X2 harness connector at the S79P Window Switch-Passenger.
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 S79P Window Switch-Passenger.
• If greater than 5.2 V
1. Ignition OFF, disconnect the X2 harness connector at the S79P Window Switch-Passenger, ignition ON.
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 S79P Window Switch-Passenger.
• If between 4.8-5.2 V
5. Verify the scan tool Passenger Mirror Vertical Position parameter is less than 4.6 V.
• If 4.6 V or greater
1. Ignition OFF, disconnect the X2 harness connector at the S79P Window Switch-Passenger, 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, replace the S79P Window Switch-Passenger.
• If less than 4.6 V
6. Install a 3 A fused jumper wire between the signal circuit terminal 11 and the 5 V reference circuit terminal 12.
7. Verify the scan tool Passenger Mirror Vertical Position or the parameter is greater than 0.6 V.
• If 0.6 V or less
1. Ignition OFF, remove the jumper wire, disconnect the X2 harness connector at the S79P Window Switch-Passenger.
2. 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
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 S79P Window Switch-Passenger.
• If greater than 0.6 V
8. Verify the scan tool Passenger Mirror Horizontal Position parameter is less than 4.6 V.
• If 4.6 V or greater
1. Ignition OFF, disconnect the X2 harness connector at the S79P Window Switch-Passenger, 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, replace the S79P Window Switch-Passenger.
• If less than 4.6 V
9. Install a 3 A fused jumper wire between the signal circuit terminal 13 and the 5 V reference circuit terminal 12.
10. Verify the scan tool Passenger Mirror Horizontal Position or the parameter is greater than 0.6 V.
• If 0.6 V or less
1. Ignition OFF, remove the jumper wire, disconnect the X2 harness connector at the S79P Window Switch-Passenger.
2. 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
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 S79P Window Switch-Passenger.
• If greater than 0.6 V
11. Test or replace the M77P Outside Rearview Mirror Motor-Passenger.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the repair.
* Outside Rearview Mirror Inner Actuator Replacement Outside Rearview Mirror Inner Actuator Replacement
* Outside Rearview Mirror Remote Control Switch Replacement Outside Rearview Mirror Remote Control Switch Replacement