Mirror System Cadillac ATS 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

Scheme 5

Scheme 6

Diagnostic Code Index

DIAGNOSTIC CODE INDEX

Diagnostic Instructions

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/ats/i-2012-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/ats/i-2012-2014/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/ats/i-2012-2014/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 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.

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 mirror control module 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

Description and Operation

Outside Mirror Description and Operation (without A45) , Outside Mirror Description and Operation (with A45)

Electrical Information Reference

1. «Circuit Testing»(/cadillac/ats/i-2012-2014/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Connector Repairs»(/cadillac/ats/i-2012-2014/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/ats/i-2012-2014/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/cadillac/ats/i-2012-2014/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. Ignition ON.
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/ats/i-2012-2014/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 the following system descriptions: «Automatic Day-Night Mirror Description and Operation»(/cadillac/ats/i-2012-2014/remont/mirrors/#mirror-system) «Outside Mirror Description and Operation (without A45)»(/cadillac/ats/i-2012-2014/remont/mirrors/#mirror-system) , «Outside Mirror Description and Operation (with A45)»(/cadillac/ats/i-2012-2014/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/ats/i-2012-2014/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. «Automatic Day-Night Mirrors Malfunction (with DR5)»(/cadillac/ats/i-2012-2014/remont/mirrors/#mirror-system) , «Automatic Day-Night Mirrors Malfunction (with DR2 or DR4)»(/cadillac/ats/i-2012-2014/remont/mirrors/#mirror-system)
2. «Heated Mirrors Malfunction»(/cadillac/ats/i-2012-2014/remont/mirrors/#mirror-system)
3. «Power Mirror Folding Malfunction (without A45)»(/cadillac/ats/i-2012-2014/remont/mirrors/#mirror-system) , «Power Mirror Folding Malfunction (with A45)»(/cadillac/ats/i-2012-2014/remont/mirrors/#mirror-system)
4. «Power Mirror Malfunction (with A45)»(/cadillac/ats/i-2012-2014/remont/mirrors/#mirror-system) , «Power Mirror Malfunction (Without A45)»(/cadillac/ats/i-2012-2014/remont/mirrors/#mirror-system)
5. «Power Mirror Tilt Inoperative in Reverse»(/cadillac/ats/i-2012-2014/remont/mirrors/#mirror-system)

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/ats/i-2012-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/ats/i-2012-2014/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/ats/i-2012-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Diagnostic Fault Information

When the HVAC control module receives a rear window defog request from the radio/HVAC controls, the HVAC control module will provide B+ voltage to the coil side of the rear defogger relay. This will energize the relay causing the contacts within the relay to close and provide B+ voltage to the rear window defogger grid, the driver outside review mirror and passenger outside rearview mirror heating elements.

Schematic Reference

Outside Rearview Mirror Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Outside Mirror Description and Operation (without A45) , Outside Mirror Description and Operation (with A45)

Electrical Information Reference

1. «Circuit Testing»(/cadillac/ats/i-2012-2014/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Connector Repairs»(/cadillac/ats/i-2012-2014/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/ats/i-2012-2014/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/cadillac/ats/i-2012-2014/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. Engine running
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/ats/i-2012-2014/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 or E17P Outside Rearview Mirror Glass-Passenger do not become warm Refer to Circuit/System Testing - Single Outside Mirror Defogger Inoperative. If both E17D Outside Rearview Mirror Glass-Driver and E17P Outside Rearview Mirror Glass-Passenger never become warm or are always warm Refer to Circuit/System Testing - Both Outside Mirror Defogger Malfunction. If both the E17D Outside Rearview Mirror Glass-Driver and the E17P Outside Rearview Mirror Glass-Passenger become warm
4. All OK.

Circuit/System Testing

Single Outside Mirror Defogger Inoperative

1. Ignition OFF and all vehicle systems 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. Engine running, 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 when commanding the Rear Defogger On with a scan tool. If the test lamp is always OFF Ignition OFF, remove the test lamp, disconnect the X3 harness connector at the X53A Fuse Block - Rear Body. 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 X53A Fuse Block - Rear Body. If the test lamp turns ON
5. Test or replace the E17 Outside Rearview Mirror Glass.

Both Outside Mirror Defogger Malfunction

1. Ignition OFF, disconnect the KR5 Rear Defogger Relay, ignition ON
2. Verify that a test lamp does not illuminate between the control circuit terminal 87B and ground. If the test lamp illuminates Repair the short to voltage on the control circuit. If the test lamp does not illuminate
3. Ignition ON, connect a 10 A fused jumper wire between the B+ circuit terminal 30 and the control circuit terminal 87B.
4. Verify the E17D Outside Rearview Mirror Glass-Driver and the E17P Outside Rearview Mirror Glass-Passenger become warm. If the E17D Outside Rearview Mirror Glass-Driver and the E17P Outside Rearview Mirror Glass-Passenger do not become warm Ignition OFF, remove the jumper wire, disconnect the X1 harness connector at the E17D Outside Rearview Mirror Glass-Driver and the E17P Outside Rearview Mirror Glass-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 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 E17D Outside Rearview Mirror Glass-Driver and the E17P Outside Rearview Mirror Glass-Passenger. If the E17D Outside Rearview Mirror Glass-Driver and the E17P Outside Rearview Mirror Glass-Passenger become warm
5. Test or replace the KR5 Rear Defogger Relay.

Component Testing

Relay Test

1. Ignition OFF, disconnect the KR5 Rear Defogger Relay.
2. Test for 60-180 ohms between terminals 86 and 85. If less than 60 ohms or greater than 180 ohms Replace the KR5 Rear Defogger Relay. If between 60-180 ohms
3. Test for infinite resistance between the terminals listed below: 30 and 86 30 and 87 30 and 85 85 and 87 If less than infinite resistance Replace the KR5 Rear Defogger Relay. If infinite resistance
4. Install a 3 A fused jumper wire between terminal 86 and 12 V. Install a jumper wire between terminal 85 and ground.
5. Test for less than 2 ohms between terminals 30 and 87B. If 2 ohms or greater Replace the KR5 Rear Defogger Relay. If less than 2 ohms
6. Test for less than 2 ohms between terminals 30 and 87B. If 2 ohms or greater Replace the KR5 Rear Defogger Relay. If less than 2 ohms
7. All OK

Perform the Diagnostic Repair Verification after completing the repair.

1. «Outside Rearview Mirror Glass Replacement»(/cadillac/ats/i-2012-2014/remont/mirrors/#mirror-system)
2. «Relay Replacement (Within an Electrical Center)»(/cadillac/ats/i-2012-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-repair-instructions__relay-replacement-within-an-electrical-center) , «Relay Replacement (Attached to Wire Harness)»(/cadillac/ats/i-2012-2014/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-repair-instructions)

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/ats/i-2012-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/ats/i-2012-2014/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/ats/i-2012-2014/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 and the engine running, 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

Description and Operation

Automatic Day-Night Mirror Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/cadillac/ats/i-2012-2014/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Connector Repairs»(/cadillac/ats/i-2012-2014/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/ats/i-2012-2014/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/cadillac/ats/i-2012-2014/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. Ignition ON.
2. Cover the windshield 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. Ignition OFF and all vehicle systems 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 Ignition OFF, remove the test lamp. 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. Ignition ON.
4. Verify a test lamp illuminates between the ignition circuit terminal 2 and ground. If the test lamp does not illuminate and the circuit fuse is good Ignition OFF, remove the test lamp. 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 Ignition OFF, remove the test lamp. Test for infinite resistance between the ignition circuit and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance 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 A10 Inside Rearview Mirror If the test lamp illuminates
5. Replace the A10 Inside Rearview Mirror.

Day-Night Disable Malfunction

1. Ignition 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. Ignition ON, 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 Ignition 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 (Automatic Transmission)»(/cadillac/ats/i-2012-2014/remont/exterior-lights/#lighting-system-dtc-b388e-to-dtc-c0297-and-diagnostic-information-and-procedures) , «Backup Lamps Malfunction (Manual Transmission)»(/cadillac/ats/i-2012-2014/remont/exterior-lights/#lighting-system-dtc-b388e-to-dtc-c0297-and-diagnostic-information-and-procedures) . If the test lamp is always ON Ignition OFF, remove the test lamp, disconnect the harness connector at the K9 Body Control Module, ignition ON. 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 (Automatic Transmission)»(/cadillac/ats/i-2012-2014/remont/exterior-lights/#lighting-system-dtc-b388e-to-dtc-c0297-and-diagnostic-information-and-procedures) , «Backup Lamps Malfunction (Manual Transmission)»(/cadillac/ats/i-2012-2014/remont/exterior-lights/#lighting-system-dtc-b388e-to-dtc-c0297-and-diagnostic-information-and-procedures) 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/ats/i-2012-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/ats/i-2012-2014/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/ats/i-2012-2014/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 and the driver outside rearview mirror. The inside rearview mirror provides a signal circuit and a low reference circuit to the driver outside rearview mirror to darken the mirror when needed.

With the gear selector lever in the REVERSE position and the engine running, 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 mirrors clearly when backing up, regardless of the rear light sensor status.

Schematic Reference

1. «Inside Rearview Mirror Schematics»(/cadillac/ats/i-2012-2014/remont/mirrors/#mirror-system)
2. «Outside Rearview Mirror Schematics»(/cadillac/ats/i-2012-2014/remont/mirrors/#mirror-system)

Connector End View Reference

Component Connector End Views

Description and Operation

Automatic Day-Night Mirror Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/cadillac/ats/i-2012-2014/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Connector Repairs»(/cadillac/ats/i-2012-2014/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/ats/i-2012-2014/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/cadillac/ats/i-2012-2014/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. Ignition ON.
2. Cover the windshield 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. Verify the A9A Outside Rearview Mirror-Driver face dims when shining a bright light into the rear light sensor. If the A9A Outside Rearview Mirror-Driver does not dim Refer to Outside Rearview Mirror Dimming Malfunction. If the A9A Outside Rearview Mirror-Driver dims
6. Verify the A9A Outside Rearview Mirror-Driver face transitions from dim to bright while commanding the Backup Lamps Active and Inactive with a scan tool. If the A9A Outside Rearview Mirror-Driver does not transition between bright and dim states Refer to Outside Rearview Mirror Dimming Malfunction. If the A9A Outside Rearview Mirror-Driver transitions between bright and dim states
7. All OK.

Inside Review Mirror Dimming Inoperative

1. Ignition OFF and all vehicle systems 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 Ignition OFF, remove the test lamp. 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. Ignition ON.
4. Verify a test lamp illuminates between the ignition circuit terminal 2 and ground. If the test lamp does not illuminate and the circuit fuse is good Ignition OFF, remove the test lamp. 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 Ignition OFF, remove the test lamp. Test for infinite resistance between the ignition circuit and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance 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 A10 Inside Rearview Mirror If the test lamp illuminates
5. Replace the A10 Inside Rearview Mirror.

Day-Night Disable Malfunction

1. Ignition OFF, disconnect the harness connector at the A10 Inside Rearview Mirror.
2. Connect a test lamp between the signal circuit terminal 1 and ground
3. Ignition ON, 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 Ignition OFF, remove the test lamp, disconnect the X337 inline harness connector. 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 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 (Automatic Transmission)»(/cadillac/ats/i-2012-2014/remont/exterior-lights/#lighting-system-dtc-b388e-to-dtc-c0297-and-diagnostic-information-and-procedures) , «Backup Lamps Malfunction (Manual Transmission)»(/cadillac/ats/i-2012-2014/remont/exterior-lights/#lighting-system-dtc-b388e-to-dtc-c0297-and-diagnostic-information-and-procedures) . If the test lamp is always ON Ignition OFF, remove the test lamp, disconnect the X337 inline harness connector, ignition ON. 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, refer to «Backup Lamps Malfunction (Automatic Transmission)»(/cadillac/ats/i-2012-2014/remont/exterior-lights/#lighting-system-dtc-b388e-to-dtc-c0297-and-diagnostic-information-and-procedures) , «Backup Lamps Malfunction (Manual Transmission)»(/cadillac/ats/i-2012-2014/remont/exterior-lights/#lighting-system-dtc-b388e-to-dtc-c0297-and-diagnostic-information-and-procedures) If the test lamp turns ON and OFF
4. Replace the A10 Inside Rearview Mirror.

Outside Rearview Mirror Dimming Malfunction

1. Ignition OFF and all vehicle systems OFF, disconnect the 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 16 and ground. If 10 ohms or greater Ignition OFF, disconnect the harness connector at the A10 Inside Rearview Mirror. 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 A10 Inside Rearview Mirror. If less than 10 ohms
3. Ignition ON.
4. Test for less than 1 V between the control circuit terminal 15 and ground. If 1 V or greater Ignition OFF, disconnect the harness connector at the A10 Inside Rearview Mirror, ignition ON. 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 A10 Inside Rearview Mirror. If less than 1 V
5. Ignition ON, headlamps ON, vehicle in PARK, cover the front light sensor with a towel or other suitable item. Shine a flashlight at the rear light sensor.
6. Test for greater than 1 V between the control circuit terminal 15 and ground. If 1 V or less Ignition OFF, disconnect the harness connector at the A10 Inside Rearview Mirror, ignition ON. 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, test or replace the A10 Inside Rearview Mirror. If greater than 1 V
7. Test or replace A9A Outside Rearview Mirror-Driver.

Perform the Diagnostic Repair Verification after completing the repair.

1. «Inside Rearview Mirror Replacement»(/cadillac/ats/i-2012-2014/remont/mirrors/#mirror-system)
2. «Outside Rearview Mirror Glass Replacement»(/cadillac/ats/i-2012-2014/remont/mirrors/#mirror-system)

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/ats/i-2012-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/ats/i-2012-2014/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/ats/i-2012-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The outside mirror switch controls the power fold/unfold functions of the outside rearview mirrors. The folding mirror motors are controlled by using bi-directional motor controls through the folding mirror motor fold control circuit and the folding mirror motor unfold control circuit.

Diagnostic Aids

Power folding mirrors only operate when the mirror selector switch is in the middle position.

Schematic Reference

Outside Rearview Mirror Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Outside Mirror Description and Operation (without A45) , Outside Mirror Description and Operation (with A45)

Electrical Information Reference

1. «Circuit Testing»(/cadillac/ats/i-2012-2014/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Connector Repairs»(/cadillac/ats/i-2012-2014/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/ats/i-2012-2014/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/cadillac/ats/i-2012-2014/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. Ignition ON.
2. Verify the operation of the A9A Outside Rearview Mirror-Driver and the A9B Outside Rearview Mirror-Passenger while commanding the FOLD and UNFOLD with the S52 Outside Rearview Mirror Switch. If the A9A Outside Rearview Mirror-Driver or the A9B Outside Rearview Mirror-Passenger do not FOLD or UNFOLD Refer to Circuit/System Testing If the A9A Outside Rearview Mirror-Driver and the A9B Outside Rearview Mirror-Passenger FOLD and UNFOLD
3. All OK.

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 9 and control circuit terminal 10.
3. Verify the test lamp turns ON when commanding the FOLD and UNFOLD states with the S52 Outside Rearview Mirror Switch. If the test lamp remains OFF during either of the commands Ignition OFF, remove the test lamp, disconnect the harness connector at the S52 Outside Rearview Mirror Switch. 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, test or replace the S52 Outside Rearview Mirror Switch. If the test lamp is always ON Ignition OFF, remove the test lamp, disconnect the harness connector at the S52 Outside Rearview Mirror Switch, ignition ON. 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, test or replace the S52 Outside Rearview Mirror Switch If the test lamp turns ON during each of the commands
4. Test or replace the A9 Outside Rearview Mirror.

Perform the Diagnostic Repair Verification after completing the repair.

1. «Outside Rearview Mirror Remote Control Switch Replacement»(/cadillac/ats/i-2012-2014/remont/mirrors/#mirror-system)
2. «Outside Rearview Mirror Replacement»(/cadillac/ats/i-2012-2014/remont/mirrors/#mirror-system)

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/ats/i-2012-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/ats/i-2012-2014/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/ats/i-2012-2014/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 contains resistors which will reduce the signal voltage from the mirror control module, the mirror memory control module is programmed to move the driver outside mirror in a direction depending upon the voltage received from the outside rearview mirror switch. The outside rearview mirror switch has a 3 position rocker switch which corresponds to the driver outside rearview mirror select, no mirror select and passenger outside mirror selected. When the switch is in the no mirror select position and the mirror position switch is held in the DOWN position, mirror control module will command the driver outside mirror to fold or unfold and send a serial data message to the memory seat control module to send a fold or unfold command to the passenger window switch which will command the passenger outside rearview mirror to fold or unfold. The mirror control module and passenger window switch control the fold/unfold motors through bi-directional control circuits.

Power folding mirrors only operate when the mirror selector switch is in the no mirror select position.

Schematic Reference

Outside Rearview Mirror Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Outside Mirror Description and Operation (without A45) , Outside Mirror Description and Operation (with A45)

Electrical Information Reference

1. «Circuit Testing»(/cadillac/ats/i-2012-2014/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Connector Repairs»(/cadillac/ats/i-2012-2014/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/ats/i-2012-2014/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/cadillac/ats/i-2012-2014/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. 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 «Power Mirror Malfunction (with A45)»(/cadillac/ats/i-2012-2014/remont/mirrors/#mirror-system) , «Power Mirror Malfunction (Without A45)»(/cadillac/ats/i-2012-2014/remont/mirrors/#mirror-system) . 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 «Power Mirror Malfunction (with A45)»(/cadillac/ats/i-2012-2014/remont/mirrors/#mirror-system) , «Power Mirror Malfunction (Without A45)»(/cadillac/ats/i-2012-2014/remont/mirrors/#mirror-system) . If the parameter changes
4. Verify the A9A Outside Rearview Mirror-Driver FOLD and UNFOLD when commanding the Driver Mirror Fold Motor to Fold and Unfold with a scan tool. If the A9A Outside Rearview Mirror-Driver does not FOLD and UNFOLD Refer to Circuit/System Testing - Driver Outside Mirror Folding Command Malfunction. If the A9A Outside Rearview Mirror-Driver does FOLD and UNFOLD
5. Verify the A9B Outside Rearview Mirror-Passenger FOLD and UNFOLD when commanding the Passenger Mirror Fold Motor to Fold and Unfold with a scan tool. If the A9B Outside Rearview Mirror-Passenger does not FOLD and UNFOLD Refer to Circuit/System Testing - Passenger Outside Mirror Folding Command Malfunction. If the A9B Outside Rearview Mirror-Passenger does FOLD and UNFOLD
6. All OK.

Driver Outside Mirror Folding Command Malfunction

1. Ignition OFF and all vehicle systems OFF, disconnect the 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 control circuit terminal 9 and ground. If 10 ohms or greater Ignition OFF, disconnect the harness connector at the K96L Mirror Control Module-Left. 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 K96L Mirror Control Module-Left. If less than 10 ohms
3. Test for less than 10 ohms between the control circuit terminal 10 and ground. If 10 ohms or greater Ignition OFF, disconnect the harness connector at the K96L Mirror Control Module-Left. 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 K96L Mirror Control Module-Left. If less than 10 ohms
4. Connect a test lamp between control circuit terminal 9 and control circuit terminal 10, ignition ON.
5. Verify the test lamp turns ON when commanding the FOLD and UNFOLD states with a scan tool. If the test lamp remains OFF during either of the commands Ignition OFF, remove the test lamp, disconnect the harness connector at the K96L Mirror Control Module-Left. 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, replace the K96L Mirror Control Module-Left. If the test lamp turns ON during each of the commands
6. Test or replace the A9A Outside Rearview Mirror-Driver.

Passenger Outside Mirror Folding Command Malfunction

1. Ignition OFF and all vehicle systems OFF, disconnect the 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 control circuit terminal 9 and ground. If 10 ohms or greater Ignition OFF, disconnect the X2 harness connector at the S79P Window Switch-Passenger. 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 S79P Window Switch-Passenger. If less than 10 ohms
3. Test for less than 10 ohms between the control circuit terminal 10 and ground. If 10 ohms or greater Ignition OFF, disconnect the X2 harness connector at the S79P Window Switch-Passenger. 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 S79P Window Switch-Passenger. If less than 10 ohms
4. Connect a test lamp between control circuit terminal 9 and control circuit terminal 10, ignition ON.
5. Verify the test lamp turns ON when commanding the FOLD and UNFOLD states with a scan tool. If the test lamp remains OFF during either of the commands Ignition OFF, remove the test lamp, disconnect the X2 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, replace the S79P Window Switch-Passenger. If the test lamp turns ON during each of the commands
6. Test or replace the A9B Outside Rearview Mirror-Passenger.

Outside Rearview Mirror

1. Ignition OFF, disconnect the harness connector at the appropriate A9 Outside Rearview Mirror.
2. Install a 10 A fused jumper wire between one of the control terminals and 12 V. Momentarily install a jumper wire between the other control terminal and ground. Reverse the jumper wires at least two times, the A9 Outside Rearview Mirror should perform the FOLD and UNFOLD functions. If the function does not perform the FOLD and UNFOLD functions Replace the A9 Outside Rearview Mirror. If the function performs the FOLD and UNFOLD functions
3. All OK

Perform the Diagnostic Repair Verification after completing the repair.

1. «Outside Rearview Mirror Replacement»(/cadillac/ats/i-2012-2014/remont/mirrors/#mirror-system)
2. «Front Side Door Window Switch Replacement - Right Side»(/cadillac/ats/i-2012-2014/remont/heated-glassdefoggers/#fixed-and-moveable-window-system)
3. «Control Module References»(/cadillac/ats/i-2012-2014/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for the left mirror control module replacement, programming and setup

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/ats/i-2012-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/ats/i-2012-2014/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/ats/i-2012-2014/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 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.

Schematic Reference

Outside Rearview Mirror Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Outside Mirror Description and Operation (without A45) , Outside Mirror Description and Operation (with A45)

Electrical Information Reference

1. «Circuit Testing»(/cadillac/ats/i-2012-2014/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Connector Repairs»(/cadillac/ats/i-2012-2014/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/ats/i-2012-2014/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/cadillac/ats/i-2012-2014/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. 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. 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/ats/i-2012-2014/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. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the K96L Mirror Control Module-Left. 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 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. Ignition ON.
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 Ignition 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 Ignition 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. Ignition OFF, connect the harness connector at the K96L Mirror Control Module-Left 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 Ignition 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 K96L Mirror Control Module-Left. If less than 10 ohms
7. Ignition ON.
8. Test for 4.8-5.2 V between the signal circuit terminal 5 and ground. If less than 4.8 V Ignition OFF, disconnect the harness connector at the K96L Mirror Control Module-Left. 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 K96L Mirror Control Module-Left. If greater than 5.2 V Ignition OFF, disconnect the harness connector at the K96L Mirror Control Module-Left, ignition ON. 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 K96L Mirror Control Module-Left. 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 Ignition OFF, disconnect the harness connector at the K96L Mirror Control Module-Left. 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 K96L Mirror Control Module-Left. If greater than 5.2 V Ignition OFF, disconnect the harness connector at the K96L Mirror Control Module-Left, ignition ON. 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 K96L Mirror Control Module-Left. If between 4.8-5.2 V
10. Test or replace the S52 Outside Rearview Mirror Switch.

Driver Outside Mirror Movement Malfunction

1. Ignition OFF, disconnect the 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 Ignition OFF, remove the test lamp, disconnect the harness connector at the K96L Mirror Control Module-Left. 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 K96L Mirror Control Module-Left. If the test lamp is always ON Ignition OFF, remove the test lamp, disconnect the harness connector at the K96L Mirror Control Module-Left, ignition ON. 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 K96L Mirror Control Module-Left 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 Ignition OFF, remove the test lamp, disconnect the harness connector at the K96L Mirror Control Module-Left. 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 K96L Mirror Control Module-Left. If the test lamp is always ON Ignition OFF, remove the test lamp, disconnect the harness connector at the K96L Mirror Control Module-Left, ignition ON. 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 K96L Mirror Control Module-Left 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 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 Ignition OFF, disconnect the harness connector at the K96L Mirror Control Module-Left. 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 K96L Mirror Control Module-Left. 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 Ignition OFF, disconnect the harness connector at the K96L Mirror Control Module-Left. 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 K96L Mirror Control Module-Left. If greater than 5.2 V Ignition OFF, disconnect the harness connector at the K96L Mirror Control Module-Left, ignition ON. 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 K96L Mirror Control Module-Left. 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 Ignition OFF, disconnect the harness connector at the K96L Mirror Control Module-Left, ignition ON. 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 K96L Mirror Control Module-Left. 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 Ignition OFF, remove the jumper wire, disconnect the harness connector at the K96L Mirror Control Module-Left. 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 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 K96L Mirror Control Module-Left. 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 Ignition OFF, disconnect the harness connector at the K96L Mirror Control Module-Left, ignition ON. 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 K96L Mirror Control Module-Left. 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 Ignition OFF, remove the jumper wire, disconnect the harness connector at the K96L Mirror Control Module-Left. 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 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 K96L Mirror Control Module-Left. 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 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 Ignition OFF, remove the test lamp, disconnect the X2 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 Ignition OFF, remove the test lamp, disconnect the X2 harness connector at the S79P Window Switch-Passenger, ignition ON. 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 Ignition OFF, remove the test lamp, disconnect the X2 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 Ignition OFF, remove the test lamp, disconnect the X2 harness connector at the S79P Window Switch-Passenger, ignition ON. 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 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 Ignition OFF, disconnect the X2 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. 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 Ignition OFF, disconnect the X2 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 Ignition OFF, disconnect the X2 harness connector at the S79P Window Switch-Passenger, ignition ON. 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 Ignition OFF, disconnect the X2 harness connector at the S79P Window Switch-Passenger, ignition ON. 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 Ignition OFF, remove the jumper wire, disconnect the X2 harness connector at the S79P Window Switch-Passenger. 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 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 Ignition OFF, disconnect the X2 harness connector at the S79P Window Switch-Passenger, ignition ON. 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 Ignition OFF, remove the jumper wire, disconnect the X2 harness connector at the S79P Window Switch-Passenger. 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 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.

1. Ignition 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/ats/i-2012-2014/remont/mirrors/#mirror-system)
2. «Outside Rearview Mirror Remote Control Switch Replacement»(/cadillac/ats/i-2012-2014/remont/mirrors/#mirror-system)
3. «Front Side Door Window Switch Replacement - Right Side»(/cadillac/ats/i-2012-2014/remont/heated-glassdefoggers/#fixed-and-moveable-window-system)
4. «Control Module References»(/cadillac/ats/i-2012-2014/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for the left mirror control module replacement, programming and setup

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/ats/i-2012-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/ats/i-2012-2014/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/ats/i-2012-2014/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 controls the outside rearview mirrors based on the position of the mirror selector switch and which movement position is selected. The outside rearview mirror switch has four positions: up, down, left, and right. B+ is applied to the switch from the power mirror fuse and when a movement position switch is selected, voltage is sent to the commanded mirror via a mirror control circuit. The opposite mirror control circuit acts as a ground circuit for the bi-directional mirror motor. Ground is applied through the switch.

Schematic Reference

Outside Rearview Mirror Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Outside Mirror Description and Operation (without A45) , Outside Mirror Description and Operation (with A45)

Electrical Information Reference

1. «Circuit Testing»(/cadillac/ats/i-2012-2014/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Connector Repairs»(/cadillac/ats/i-2012-2014/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/ats/i-2012-2014/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/cadillac/ats/i-2012-2014/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

1. Verify the mirror glass of the A9A Outside Rearview Mirror-Driver and the A9B Outside Rearview Mirror-Passenger move UP, DOWN, LEFT and RIGHT with the S52 Outside Rearview Mirror Switch. If both outside mirror glasses do not move Refer to Circuit/System Testing - Both Outside Rearview Mirrors Inoperative. If the driver outside mirror glass does not move UP, DOWN, LEFT or RIGHT Refer to Circuit/System Testing - Driver Outside Mirror Movement Malfunction. If the passenger outside mirror glass does not move UP, DOWN, LEFT or RIGHT Refer to Circuit/System Testing - Passenger Outside Mirror Movement Malfunction. If the mirror glass of the A9A Outside Rearview Mirror-Driver and the A9B Outside Rearview Mirror-Passenger move UP, DOWN, LEFT and RIGHT
2. All OK.

Both Outside Rearview Mirrors Inoperative

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 11 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. Verify a test lamp illuminates between the B+ circuit terminal 12 and ground. If the test lamp does not illuminate and the circuit fuse is good Ignition 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 Ignition 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 Test for infinite resistance between each of the control circuit terminals listed below and ground: Control circuit terminal 1 Control circuit terminal 2 Control circuit terminal 3 Control circuit terminal 7 Control circuit terminal 8 Control circuit terminal 9 If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance, replace the appropriate M77 Outside Rearview Mirror Motor. 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 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 the S52 Outside Rearview Mirror Switch. If the test lamp remains OFF during either of the commands Ignition OFF, remove the test lamp, disconnect the harness connector at the S52 Outside Rearview Mirror Switch. 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, test or replace the S52 Outside Rearview Mirror Switch. If the test lamp is always ON Ignition OFF, remove the test lamp, disconnect the harness connector at the S52 Outside Rearview Mirror Switch, ignition ON. 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, test or 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 the S52 Outside Rearview Mirror Switch. If the test lamp remains OFF during either of the commands Ignition OFF, remove the test lamp, disconnect the harness connector at the S52 Outside Rearview Mirror Switch. 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, test or replace the S52 Outside Rearview Mirror Switch. If the test lamp is always ON Ignition OFF, remove the test lamp, disconnect the harness connector at the S52 Outside Rearview Mirror Switch, ignition ON. 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, test or 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.

Passenger Outside Mirror Movement Malfunction

1. Ignition OFF, disconnect the 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 the S52 Outside Rearview Mirror Switch. If the test lamp remains OFF during either of the commands Ignition OFF, remove the test lamp, disconnect the harness connector at the S52 Outside Rearview Mirror Switch. 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, test or replace the S52 Outside Rearview Mirror Switch. If the test lamp is always ON Ignition OFF, remove the test lamp, disconnect the harness connector at the S52 Outside Rearview Mirror Switch, ignition ON. 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, test or 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 the S52 Outside Rearview Mirror Switch. If the test lamp remains OFF during either of the commands Ignition OFF, remove the test lamp, disconnect the harness connector at the S52 Outside Rearview Mirror Switch. 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, test or replace the S52 Outside Rearview Mirror Switch. If the test lamp is always ON Ignition OFF, remove the test lamp, disconnect the harness connector at the S52 Outside Rearview Mirror Switch, ignition ON. 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, test or replace the S52 Outside Rearview Mirror Switch If the test lamp turns ON during each of the commands
6. Test or replace the M77P Outside Rearview Mirror Motor-Passenger.

Perform the Diagnostic Repair Verification after completing the repair.

1. «Outside Rearview Mirror Remote Control Switch Replacement»(/cadillac/ats/i-2012-2014/remont/mirrors/#mirror-system)
2. «Outside Rearview Mirror Inner Actuator Replacement»(/cadillac/ats/i-2012-2014/remont/mirrors/#mirror-system)

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/ats/i-2012-2014/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/ats/i-2012-2014/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/ats/i-2012-2014/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.

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

Description and Operation

Outside Mirror Description and Operation (without A45) , Outside Mirror Description and Operation (with A45)

Electrical Information Reference

1. «Circuit Testing»(/cadillac/ats/i-2012-2014/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Connector Repairs»(/cadillac/ats/i-2012-2014/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/ats/i-2012-2014/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/cadillac/ats/i-2012-2014/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. Ignition ON.
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 (with A45)»(/cadillac/ats/i-2012-2014/remont/mirrors/#mirror-system) , «Power Mirror Malfunction (Without A45)»(/cadillac/ats/i-2012-2014/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 (with A45)»(/cadillac/ats/i-2012-2014/remont/mirrors/#mirror-system) , «Power Mirror Malfunction (Without A45)»(/cadillac/ats/i-2012-2014/remont/mirrors/#mirror-system) . If the A9B Outside Rearview Mirror-Passenger moves RIGHT, LEFT, UP and DOWN
4. All OK.

1. Engine running, 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 7

Outside Rearview Mirror Replacement

Scheme 8

Outside Rearview Mirror Gasket Replacement

Scheme 9

Outside Rearview Mirror Housing Upper Cover Replacement

Scheme 10

Outside Rearview Mirror Housing Lower Cover Replacement

Scheme 11

Outside Rearview Mirror Remote Control Switch Replacement

Scheme 12

Outside Rearview Mirror Folding Control Module Replacement

Scheme 13

Outside Rearview Mirror Inner Actuator Replacement

Scheme 14

Outside Rearview Mirror Glass Replacement

Scheme 15

Inside Rearview Mirror 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 direction switch - Controls the left, right, up and down movements of the mirrors
2. Mirror select switch - Allows the operator to select the mirror to be moved
3. Left outside mirror - Contains both the horizontal and vertical mirror motors
4. Right outside mirror - Contains both the horizontal and vertical mirror motors

Each of the outside power mirrors contains 2 motors. The up-down motor operates the vertical directions and the left-right motor operates the horizontal directions. Each of the power mirror motors are internally circuit breaker protected.

Scheme 16

The outside mirror switch incorporates a mirror select switch and a 4 position mirror direction switch.

The mirror select switch allows the driver to select the mirror to be moved by turning the switch to L position enabling the left outside mirror or turning the switch to R position enabling the right outside mirror.

The mirror direction switch is a 4 position switch that allows the operator to move the selected mirror up, down, left or right.

The outside mirror switch receives power through the battery positive voltage circuit from the underhood fuse block. The outside mirror switch also receives a constant ground.

The 4 positions of the direction switch have multiple switch contacts. When not in use, the directional contacts are isolated from any circuit. Each of the contacts are connected to opposing sides of the appropriate mirror motors through the selector switch. The selector switch interrupts or completes these circuits depending on the position of the selector switch, L or R.

If the mirror select switch is placed in the L position and the up switch is pressed, battery voltage will be supplied to the driver outside mirror vertical motor through the driver mirror motor up control circuit and return to the mirror switch through the driver mirror motor left/down control circuit, then to ground and the mirror will move up. If the down switch is pressed, the driver mirror motor left/down control circuit supplies battery voltage and the driver mirror motor up control circuit completes the path to the mirror switch, then to ground and the mirror will move down.

The remainder of the mirror functions operate in the same manner as described above. Placing the mirror control switch in opposing positions, left/right or up/down, will reverse the voltage polarity to the mirror motor, utilizing the same circuits and the mirror will move accordingly.

Heated Mirrors

The heated mirrors are controlled through the rear defog relay. Whenever 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.

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.

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
• 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
• Relay Replacement (Within an Electrical Center)
• Relay Replacement (Attached to Wire Harness)
• Backup Lamps Malfunction (Automatic Transmission)
• Memory Seat Feature Malfunction
• Front Side Door Trim Replacement
• Fastener Caution
• Outside Rearview Mirror Turn Signal Lamp Replacement
• Windshield Multifunction Sensor Mount Bracket Cover Replacement (With UEU, UFL)
• DTC B154A or B154B