Mirror System Cadillac ELR I

Fastener Tightening Specifications

Fastener Tightening Specifications

Adhesives, Fluids, Lubricants, and Sealers

Adhesives, Fluids, Lubricants, and Sealers

Scheme 1

Scheme 2

Scheme 3

Scheme 4

Diagnostic Code Index

DIAGNOSTIC CODE INDEX

Diagnostic Instructions

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Circuit/System Description

The outside rearview mirror switch 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 outside rearview mirror switch, mirror output commands are sent to the appropriate module/switch through the serial data circuit. The outside rearview 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 rearview 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 rearview mirror switch and passenger window switch. The switches will then drive the appropriate mirror motors to the commanded position sensor settings.

Conditions for Running the DTC

Battery voltage must be between 9-16 V.

Conditions for Setting the DTC

B154A 39

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

B154B 39

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

Action Taken When the DTC Sets

The affected outside rearview mirror will be inoperative.

Conditions for Clearing the DTC

B154A 39

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

B154B 39

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

Reference Information

Schematic Reference

Outside Rearview Mirror Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

Outside Mirror Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Connector Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

1. Vehicle in Service Mode
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.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

Outside Rearview Mirror Inner Actuator Replacement .

Symptoms - Mirrors

Note. The following steps must be completed before using the symptom tables.

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) before using the Symptom Tables in order to verify that all of the following are true: There are no DTCs set. The control modules can communicate via the serial data link.
2. Review the system operation in order to familiarize yourself with the system functions. Refer to «Outside Mirror Description and Operation»(/cadillac/elr/i-2013-2015/remont/mirrors/#mirror-system) , and «Automatic Day-Night Mirror Description and Operation»(/cadillac/elr/i-2013-2015/remont/mirrors/#mirror-system) .

Visual/Physical Inspection

1. Inspect for aftermarket devices which could affect the operation of the system. Refer to «Checking Aftermarket Accessories»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__checking-aftermarket-accessories) .
2. Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.

Intermittent

Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections .

Symptom List

Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom

1. «Heated Mirrors Malfunction»(/cadillac/elr/i-2013-2015/remont/mirrors/#mirror-system)
2. «Power Mirror Malfunction»(/cadillac/elr/i-2013-2015/remont/mirrors/#mirror-system)
3. «Automatic Day-Night Mirrors Malfunction»(/cadillac/elr/i-2013-2015/remont/mirrors/#mirror-system)

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Diagnostic Fault Information

The rear defogger relay supplies voltage to the outside rearview mirror heater elements based on the current state of the rear window defogger. The relay supplies B+ through the driver/passenger mirror heating element control circuit when a request is received.

Schematic Reference

Outside Rearview Mirror Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

Outside Mirror Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Connector Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

1. Vehicle in Service Mode.
2. Verify the E18 Rear Defogger Grid turns ON and OFF when commanding the Rear Defogger On and Off with a scan tool. If the E18 Rear Defogger Grid does not turn ON or OFF Refer to «Rear Window Defogger Malfunction»(/cadillac/elr/i-2013-2015/remont/heated-glassdefoggers/#fixed-and-moveable-window-system) . If the E18 Rear Defogger Grid turns ON and OFF
3. Verify the E17D Outside Rearview Mirror Glass-Driver and the E17P Outside Rearview Mirror Glass-Passenger become warm when commanding the Rear Defogger On with a scan tool. If the E17D Outside Rearview Mirror Glass-Driver and the E17P Outside Rearview Mirror Glass-Passenger do not become warm Refer to Circuit/System Testing. If the E17D Outside Rearview Mirror Glass-Driver and the E17P Outside Rearview Mirror Glass-Passenger become warm
4. All OK.

Circuit/System Testing

1. Vehicle OFF, disconnect the X1 and X2 harness connectors at the appropriate E17 Outside Rearview Mirror Glass. 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 1 X2 and ground. If 10 ohms or greater Ignition OFF. 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. Vehicle in Service Mode, connect a test lamp between the control circuit terminal 1 X1 and the ground circuit terminal 1 X2.
4. Verify the test lamp turns ON and OFF when commanding the Rear Defogger On and Off with a scan tool. If the test lamp is always OFF Vehicle OFF, remove the test lamp, disconnect the harness connector at the X50A Fuse Block-Underhood. Test for infinite resistance between the control circuit and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance Test for less than 2 ohms in the 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 E17 Outside Rearview Mirror Glass. If the test lamp is always ON Vehicle OFF, remove the test lamp, disconnect the harness connector at the X50A Fuse Block-Underhood, Vehicle in Service Mode. Test for less than 1 V between the control circuit and ground. If 1 V or greater, repair the short to voltage on the circuit. If less than 1 V, replace the X50A Fuse Block-Underhood If the test lamp turns ON and OFF
5. Test or replace the E17 Outside Rearview Mirror Glass.

Perform the Diagnostic Repair Verification after completing the repair.

Outside Rearview Mirror Glass Replacement

Fuse Block Replacement

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach
3. «Diagnostic Procedure Instructions»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category

The inside rearview mirror uses 2 photocell sensors. One sensor is the rear light sensor, located on the face side of the mirror, facing the rear of the vehicle. The rear light sensor is used to determine light conditions present at the mirror face. The other sensor is the front light sensor, located on the backside of the mirror, facing the front of the vehicle. The front light sensor is used to determine the exterior light conditions at the front of the vehicle. With a low exterior light condition detected by the front light sensor and a high light condition from the rear light sensor, the inside rearview mirror will automatically darken the face of the inside rearview mirror.

With the gear selector lever in the REVERSE position, backup lamp control voltage is supplied as an input to the inside rearview mirror. The mirror monitors this input to disable the automatic day-night feature. This allows the driver to see objects in the mirror clearly when backing up, regardless of the rear light sensor status.

Schematic Reference

Inside Rearview Mirror Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

Automatic Day-Night Mirror Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Connector Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

1. Vehicle ON.
2. Cover the rear window with a blanket or other suitable item.
3. Verify the A10 Inside Rearview Mirror face dims when shining a bright light into the rear light sensor If the A10 Inside Rearview Mirror does not dim Refer to Circuit/System Testing - Inside Review Mirror Dimming Inoperative If the A10 Inside Rearview Mirror dims
4. Verify the A10 Inside Rearview Mirror face transitions from dim to bright while commanding the Backup Lamps Active and Inactive with a scan tool. If the A10 Inside Rearview Mirror does not transition between dim and bright. Refer to Circuit/System Testing - Day-Night Disable Malfunction If the A10 Inside Rearview Mirror transitions between bright and dim states
5. All OK.

Inside Review Mirror Dimming Inoperative

1. Vehicle OFF, disconnect the harness connector at the A10 Inside 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 ground circuit terminal 5 and ground. If 10 ohms or greater Vehicle OFF. 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. Vehicle in Service Mode.
4. Verify a test lamp illuminates between the B+ circuit terminal 2 and ground. If the test lamp does not illuminate and the circuit fuse is good Vehicle OFF. Test for less than 2 ohms in the B+ 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 Vehicle OFF. 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, replace the A10 Inside Rearview Mirror. If the test lamp illuminates
5. Replace the A10 Inside Rearview Mirror.

Day-Night Disable Malfunction

1. Vehicle OFF, disconnect the harness connector at the A10 Inside Rearview Mirror.
2. Connect a test lamp between the control circuit terminal 1 and ground
3. Vehicle in Service Mode, verify the test lamp turns ON and OFF while commanding the Backup Lamps Active and Inactive with a scan tool. If the test lamp is always OFF Vehicle OFF, remove the test lamp, disconnect the harness connector at the K9 Body Control Module. Test for infinite resistance between the control circuit terminal 1 and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance Test for less than 2 ohms in the control circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, refer to «Backup Lamps Malfunction»(/cadillac/elr/i-2013-2015/remont/exterior-lights/#lighting-system) . If the test lamp is always ON Vehicle OFF, remove the test lamp, disconnect the harness connector at the K9 Body Control Module, Vehicle in Service Mode. Test for less than 1 V between the control circuit and ground. If 1 V or greater, repair the short to voltage on the circuit. If less than 1 V, refer to «Backup Lamps Malfunction»(/cadillac/elr/i-2013-2015/remont/exterior-lights/#lighting-system) If the test lamp turns ON and OFF
4. Replace the A10 Inside Rearview Mirror.

Perform the Diagnostic Repair Verification after completing the repair.

Inside Rearview Mirror Replacement

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

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 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.

Schematic Reference

Outside Rearview Mirror Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

Outside Mirror Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Connector Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

1. Vehicle in Service Mode.
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. Verify the A9A Outside Rearview Mirror-Driver and A9B Outside Rearview Mirror-Passenger adjust to the stored memory positions when operating the S47D Driver Seat Memory Switch. If a A9 Outside Rearview Mirror does not adjust to the stored memory position Refer to «Memory Seat Feature Malfunction»(/cadillac/elr/i-2013-2015/remont/seats/#power-seat-system) . If the A9A Outside Rearview Mirror-Driver and A9B Outside Rearview Mirror-Passenger adjust to the stored memory positions
11. All OK.

Outside Rearview Mirror Switch Malfunction

1. Vehicle OFF and all vehicle systems OFF, disconnect the harness connector at the K96D Mirror Control Module-Driver. 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 14 and ground. If 10 ohms or greater Vehicle OFF. 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. Vehicle in Service Mode.
4. Verify a test lamp illuminates between the B+ circuit terminal 1 and ground. If the test lamp does not illuminate and the circuit fuse is good Vehicle OFF. Test for less than 2 ohms in the B+ 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 Vehicle OFF. Test for infinite resistance between the B+ circuit and ground. If less than infinite resistance, repair the short to ground on the circuit. If the test lamp illuminates
5. Vehicle OFF, connect the harness connector at the K96D Mirror Control Module-Driver and 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.
6. Test for less than 10 ohms between the low reference circuit terminal 11 and ground. If 10 ohms or greater Vehicle OFF. 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 K96D Mirror Control Module-Driver. If less than 10 ohms
7. Vehicle in Service Mode.
8. Test for 4.8-5.2 V between the signal circuit terminal 5 and ground. If less than 4.8 V Vehicle OFF, disconnect the harness connector at the K96D Mirror Control Module-Driver. 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 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 K96D Mirror Control Module-Driver. If greater than 5.2 V Vehicle OFF, disconnect the harness connector at the K96D Mirror Control Module-Driver, Vehicle in Service Mode. 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 K96D Mirror Control Module-Driver. If between 4.8-5.2 V
9. Test for 4.8-5.2 V between the signal circuit terminal 12 and ground. If less than 4.8 V Vehicle OFF, disconnect the harness connector at the K96D Mirror Control Module-Driver. 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 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 K96D Mirror Control Module-Driver. If greater than 5.2 V Vehicle OFF, disconnect the harness connector at the K96D Mirror Control Module-Driver, Vehicle in Service Mode. 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 K96D Mirror Control Module-Driver. If between 4.8-5.2 V
10. Test or replace the S52 Outside Rearview Mirror Switch.

Driver Outside Mirror Movement Malfunction

1. Vehicle OFF, disconnect the X510 harness connector at the A9A Outside Rearview Mirror-Driver. Vehicle in Service Mode
2. Connect a test lamp between the control circuit terminal 9 and control circuit terminal 12.
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 Vehicle OFF, remove the test lamp, disconnect the harness connector at the K96D Mirror Control Module-Driver. 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 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 K96D Mirror Control Module-Driver. If the test lamp is always ON Vehicle OFF, remove the test lamp, disconnect the harness connector at the K96D Mirror Control Module-Driver, Vehicle in Service Mode. 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 K96D Mirror Control Module-Driver If the test lamp turns ON during each of the commands
4. Connect a test lamp between the control circuit terminal 10 and control circuit terminal 12.
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 Vehicle OFF, remove the test lamp, disconnect the harness connector at the K96D Mirror Control Module-Driver. 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 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 K96D Mirror Control Module-Driver. If the test lamp is always ON Vehicle OFF, remove the test lamp, disconnect the harness connector at the K96D Mirror Control Module-Driver, Vehicle in Service Mode. 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 K96D Mirror Control Module-Driver 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. Vehicle OFF and all vehicle systems OFF, disconnect the X510 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 3 and ground. If 10 ohms or greater Vehicle OFF, disconnect the harness connector at the K96D Mirror Control Module-Driver. 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 K96D Mirror Control Module-Driver. If less than 10 ohms
3. Vehicle in Service Mode.
4. Test for 4.8-5.2 V between the 5 V reference circuit terminal 17 and ground. If less than 4.8 V Vehicle OFF, disconnect the harness connector at the K96D Mirror Control Module-Driver. 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 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 K96D Mirror Control Module-Driver. If greater than 5.2 V Vehicle OFF, disconnect the harness connector at the K96D Mirror Control Module-Driver, Vehicle in Service Mode. 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 K96D Mirror Control Module-Driver. 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 Vehicle OFF, disconnect the harness connector at the K96D Mirror Control Module-Driver, Vehicle in Service Mode. Test for less than 1 V between the signal circuit terminal 14 and ground. If 1 V or greater, repair the short to voltage on the circuit. If less than 1 V, replace the K96D Mirror Control Module-Driver. If less than 4.6 V
6. Install a 3 A fused jumper wire between the signal circuit terminal 14 and the 5 V reference circuit terminal 17.
7. Verify the scan tool Driver Mirror Vertical Position or the parameter is greater than 0.6 V. If 0.6 V or less Vehicle OFF, remove the jumper wire, disconnect the harness connector at the K96D Mirror Control Module-Driver. Test for infinite resistance between the signal circuit terminal 14 and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance 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 K96D Mirror Control Module-Driver. 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 Vehicle OFF, disconnect the harness connector at the K96D Mirror Control Module-Driver, Vehicle in Service Mode. Test for less than 1 V between the signal circuit terminal 7 and ground. If 1 V or greater, repair the short to voltage on the circuit. If less than 1 V, replace the K96D Mirror Control Module-Driver. If less than 4.6 V
9. Install a 3 A fused jumper wire between the signal circuit terminal 7 and the 5 V reference circuit terminal 17.
10. Verify the scan tool Driver Mirror Horizontal Position or the parameter is greater than 0.6 V. If 0.6 V or less Vehicle OFF, remove the jumper wire, disconnect the harness connector at the K96D Mirror Control Module-Driver. Test for infinite resistance between the signal circuit terminal 7 and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance 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 K96D Mirror Control Module-Driver. If greater than 0.6 V
11. Test or replace the M77D Outside Rearview Mirror Motor-Driver.

Passenger Outside Mirror Movement Malfunction

1. Vehicle OFF, disconnect the X610 harness connector at the A9B Outside Rearview Mirror-Passenger. Vehicle in Service Mode
2. Connect a test lamp between the control circuit terminal 8 and control circuit terminal 11.
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 Vehicle OFF, remove the test lamp, disconnect the harness connector at the S79P Window Switch-Passenger. 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 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 Vehicle OFF, remove the test lamp, disconnect the harness connector at the S79P Window Switch-Passenger, Vehicle in Service Mode. 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 11 and control circuit terminal 9.
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 Vehicle OFF, remove the test lamp, disconnect the harness connector at the S79P Window Switch-Passenger. 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 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 Vehicle OFF, remove the test lamp, disconnect the harness connector at the S79P Window Switch-Passenger, Vehicle in Service Mode. 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. Vehicle OFF and all vehicle systems OFF, disconnect the X610 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 5 and ground. If 10 ohms or greater Vehicle OFF, disconnect the harness connector at the S79P Window Switch-Passenger. 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. Vehicle in Service Mode.
4. Test for 4.8-5.2 V between the 5 V reference circuit terminal 12 and ground. If less than 4.8 V Vehicle OFF, disconnect the harness connector at the S79P Window Switch-Passenger. 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 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 Vehicle OFF, disconnect the harness connector at the S79P Window Switch-Passenger, Vehicle in Service Mode. 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 Vehicle OFF, disconnect the X2 harness connector at the S79P Window Switch-Passenger, Vehicle in Service Mode. Test for less than 1 V between the signal circuit terminal 1 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 1 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 Vehicle OFF, remove the jumper wire, disconnect the harness connector at the S79P Window Switch-Passenger. Test for infinite resistance between the signal circuit terminal 1 and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance 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 Vehicle OFF, disconnect the harness connector at the S79P Window Switch-Passenger, Vehicle in Service Mode. Test for less than 1 V between the signal circuit terminal 3 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 3 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 Vehicle OFF, remove the jumper wire, disconnect the harness connector at the S79P Window Switch-Passenger. Test for infinite resistance between the signal circuit terminal 3 and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance 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.

Component Testing

1. Vehicle OFF, disconnect the harness connector at the S52 Outside Rearview Mirror Switch.
2. Test for infinite resistance between the signal terminal 12 and the low reference terminal 11 with the mirror direction switch in the open position. If less than infinite resistance Replace the S52 Outside Rearview Mirror Switch. If infinite resistance
3. Test for 330-350 ohms between the signal terminal 12 and the low reference terminal 11 with the mirror direction switch in the Left position. If less than 329 ohms or greater than 351 ohms Replace the S52 Outside Rearview Mirror Switch. If between 330-350 ohms
4. Test for 0.65K-0.75K ohms between the signal terminal 12 and the low reference terminal 11 with the mirror direction switch in the Right position. If less than 0.64K ohms or greater than 0.76K ohms Replace the S52 Outside Rearview Mirror Switch. If between 0.65K-0.75K ohms
5. Test for 1.3K-1.5K ohms between the signal terminal 12 and the low reference terminal 11 with the mirror direction switch in the Up position. If less than 1.29K ohms or greater than 1.55K ohms Replace the S52 Outside Rearview Mirror Switch. If between 1.3K-1.5K ohms
6. Test for 3.2K-3.4K ohms between the signal terminal 12 and the low reference terminal 11 with the mirror direction switch in the Down position. If less than 3.1K ohms or greater than 3.5K ohms Replace the S52 Outside Rearview Mirror Switch. If between 3.2K-3.4K ohms
7. Test for 1K-0.9K ohms between the signal terminal 5 and the low reference terminal 11 with the mirror selector switch in the Passenger position. If less than 1K ohms or greater than 0.8K ohms Replace the S52 Outside Rearview Mirror Switch. If between 1K-0.9K ohms
8. Test for 305-312 ohms between the signal terminal 5 and the low reference terminal 11 with the mirror selector switch in the Driver position. If less than 304 ohms or greater than 313 ohms Replace the S52 Outside Rearview Mirror Switch. If between 305-312 ohms
9. All OK

Perform the Diagnostic Repair Verification after completing the repair.

1. «Outside Rearview Mirror Inner Actuator Replacement»(/cadillac/elr/i-2013-2015/remont/mirrors/#mirror-system)
2. «Outside Rearview Mirror Remote Control Switch Replacement»(/cadillac/elr/i-2013-2015/remont/mirrors/#mirror-system)
3. «Front Side Door Window Switch Replacement»(/cadillac/elr/i-2013-2015/remont/heated-glassdefoggers/#fixed-and-moveable-window-system)
4. «Control Module References»(/cadillac/elr/i-2013-2015/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for the mirror control module replacement, programming and setup

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

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 park tilt mirror in reverse command, the memory seat module will send the tilt down command to the mirror control module and the passenger window switch. The mirror control module and the passenger window switch will then drive the appropriate mirror motors to the commanded position.

Diagnostic Aids

The Park Tilt Mirror in Reverse is a feature in the Personalization Menu of the audio system controls that allows the operator to program the driver and/or passenger outside rearview mirrors to tilt downward when the vehicle is shifted into R (reverse). Verify that this feature has been correctly programmed into the system before performing extensive diagnostics

Schematic Reference

Outside Rearview Mirror Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

Outside Mirror Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Connector Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

1. Vehicle in Service Mode.
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 Refer to «Power Mirror Malfunction»(/cadillac/elr/i-2013-2015/remont/mirrors/#mirror-system) . 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 Refer to «Power Mirror Malfunction»(/cadillac/elr/i-2013-2015/remont/mirrors/#mirror-system) . If the A9B Outside Rearview Mirror-Passenger moves RIGHT, LEFT, UP and DOWN
4. All OK.

1. Vehicle in Service Mode, shift the vehicle in REVERSE.
2. Verify that the appropriate A9 Outside Rearview Mirror moves DOWN. If the A9 Outside Rearview Mirror does not move DOWN Replace the K40 Seat Memory Control Module If the A9 Outside Rearview Mirror does move DOWN
3. All OK.

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for the seat memory control module replacement, programming and setup

Scheme 5

Outside Rearview Mirror Replacement

Scheme 6

Outside Rearview Mirror Housing Cover Replacement

Scheme 7

Outside Rearview Mirror Bracket Cover Replacement

Scheme 8

Outside Rearview Mirror Housing Bezel Replacement

Scheme 9

Outside Rearview Mirror Remote Control Switch Replacement

Scheme 10

Outside Rearview Mirror Memory Module Replacement

Scheme 11

Outside Rearview Mirror Inner Actuator Replacement

Scheme 12

Outside Rearview Mirror Glass Replacement

Scheme 13

Inside Rearview Mirror Replacement

Inside Rearview Mirror Bracket Installation

Special Tools

Safety Razor or Utility Knife

Scheme 14

1. Determine the location of the mirror mounting base by marking the outside of the windshield with a marking pencil where the base was previously located. If it is not clear where the base was mounted, use the following steps to determine where the base should be installed: Using a measuring tape, measure the distance between the windshield pillars from the base of the shade line . Using a marking pencil, halfway between the windshield pillars, draw a centerline (1) on the windshield from the roof panel to the windshield base. Draw a perpendicular line intersecting the centerline (2) at that location. The top center of the mirror mounting base will be at the intersection of these lines.
2. Scrape the inside windshield thoroughly with a safety razor or utility knife in order to remove all old adhesive.
3. If reinstalling the original mounting base, place the mirror mounting base in a suitable holding device, such as a vise.
4. Clean the mirror mounting base thoroughly with a safety razor or utility knife in order to remove all old adhesive.
5. Clean the inside windshield and the mounting surface of the mirror mounting base thoroughly with a clean cloth saturated with naphtha or a 50/50 mixture (by volume) of clean water and isopropyl alcohol.
6. Use Inside Mirror Adhesive Kit GM P/N 89021329 (Canadian P/N 89020893), or equivalent, to apply a small amount of activator to the mounting surface of the mirror mounting base.
7. Apply a small amount of activator to the windshield where the mounting base is to be installed.
8. Allow the activator to dry 5 minutes.
9. Apply 1 drop of adhesive to the center of the mirror mounting base.
10. Immediately apply the mounting base to the windshield, ensuring that the mounting base aligns correctly to the marks made on the outside of the windshield.
11. Hold the mounting base firmly in place for 1 minute.
12. Allow the adhesive to set for 15 minutes.
13. Install the mirror to the mirror mounting base and fasten, if necessary.
14. Connect the electrical connector and install the wire cover, if equipped.

Scheme 15

Inside Rearview Mirror Wiring Harness Cover Replacement

Scheme 16

Inside Rearview Mirror Wiring Harness Lower Cover Replacement

Inside Rearview Mirror with the Automatic Day-Night Feature System Operation

The inside rearview mirror uses 2 photocell sensors. One sensor is the headlight sensor, located on the face side of the mirror. The headlight sensor is used to determine light conditions present at the mirror face. The other sensor is the ambient light sensor, located on the rear of the mirror or windshield side. The ambient light sensor is used to determine the exterior light conditions. With a low exterior light condition detected, and a high light condition from behind the car, at the headlight sensor, the inside rearview mirror will automatically darken the face of the mirror.

In the daytime, the mirror is in a normal state because of the high exterior light condition that is indicated by the ambient light sensor. With the gear selector lever in the REVERSE position and the engine running, backup lamp supply voltage is supplied as an input to the inside rearview mirror. The mirror monitors this input to disable the automatic day-night feature. This allows the driver to see objects in the mirror clearly when backing up, even during the night.

Driver Outside Rearview Mirror with Automatic Day-Night System Operation (If Equipped)

The automatic day-night feature of the driver outside rearview mirror is controlled by the inside rearview mirror. The inside rearview mirror supplies control and low reference to the driver outside rearview mirror. At night, with the automatic day-night feature enabled, the driver outside rearview mirror will automatically darken with the inside rearview mirror to reduce glare from headlamps behind the vehicle.

The power mirror system consists of the following components

1. Mirror Control Module
2. Memory Seat Control Module
3. Outside Mirror Switch
4. Passenger Window Switch
5. Left Outside Rearview Mirror
6. Right Outside Rearview Mirror

Scheme 17

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 control 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 control 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.

Folding Mirrors

The outside rearview mirror switch sends the mirror select and mirror fold/unfold inputs to the mirror control module which communicates the inputs to the memory seat control module through serial data. When the memory seat control module receives a fold/unfold signal it will send a fold/unfold command to the mirror control module and the passenger window switch. The outside mirrors will fold or unfold depending on their current state. The mirror control module and the passenger window switch control the fold/unfold motors through bi-directional control circuits.

Heated Mirrors

The heated mirrors are controlled through the rear defog relay. Whenever the vehicle is running and the rear window defogger is turned on battery voltage is supplied to the mirror heater elements through the left and right mirror heater element control circuits.

See also:
• Diagnostic System Check - Vehicle
• Strategy Based Diagnosis
• Diagnostic Procedure Instructions
• COMPONENT CONNECTOR END VIEWS - INDEX
• Circuit Testing
• Connector Repairs
• Testing for Intermittent Conditions and Poor Connections
• Wiring Repairs
• Control Module References
• Diagnostic Repair Verification
• Checking Aftermarket Accessories
• Rear Window Defogger Malfunction
• Fuse Block Replacement
• Backup Lamps Malfunction
• Memory Seat Feature Malfunction
• Glass and Sheet Metal Handling Warning
• Fastener Caution
• Front Side Door Accessory Switch Mount Plate Replacement (Driver Side)
• DTC B154A or B154B