Contents Wiring diagrams Section: Mirrors All sections

Mirror System: Other GMC Sierra III

Mirrors 8 illustrations ~2661 words

Reference Information

Schematic Reference

Outside Rearview Mirror Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

Outside Mirror Description and Operation (Without A45) , Outside Mirror Description and Operation (With A45)

Electrical Information Reference

  1. «Circuit Testing»(ref-651023-S06735791342014081900000)
  2. «Connector Repairs»(ref-651023-S36930316752014081900000)
  3. «Testing for Intermittent Conditions and Poor Connections»(ref-651023-S31795657182014081900000)
  4. «Wiring Repairs»(ref-651023-S35699655412014081900000)

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»(ref-650999-S38140870152014081900000) 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: «Outside Mirror Description and Operation (Without A45)»(ref-651040-S21331952052014081900000) , «Outside Mirror Description and Operation (With A45)»(ref-651040-S02546384262014081900000) «Automatic Day-Night Mirror Description and Operation»(ref-651040-S36515836592014081900000)

Intermittent

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

Schematic Reference

Outside Rearview Mirror Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

Outside Mirror Description and Operation (Without A45) , Outside Mirror Description and Operation (With A45)

Electrical Information Reference

  1. «Circuit Testing»(ref-651023-S06735791342014081900000)
  2. «Connector Repairs»(ref-651023-S36930316752014081900000)
  3. «Testing for Intermittent Conditions and Poor Connections»(ref-651023-S31795657182014081900000)
  4. «Wiring Repairs»(ref-651023-S35699655412014081900000)

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 and OFF Refer to «Rear Window Defogger Malfunction»(ref-651039-S05211154432014081900000) . If the E18 Rear Defogger Grid turns ON and OFF
  3. Verify the E17D Outside Rearview Mirror Glass-Driver and the E17P Outside Rearview Mirror Glass-Passenger become warm when commanding the Rear Defogger On with a scan tool. If the E17D Outside Rearview Mirror Glass-Driver and the E17P Outside Rearview Mirror Glass-Passenger do not become warm Refer to Circuit/System Testing. If both E17D Outside Rearview Mirror Glass-Driver and the E17P Outside Rearview Mirror Glass-Passenger become warm
  4. All OK.

Perform the Diagnostic Repair Verification after completing the repair.

Outside Rearview Mirror Glass Replacement

Schematic Reference

  1. «Inside Rearview Mirror Schematics»(ref-651040-S06158248472014081900000)
  2. «Outside Rearview Mirror Schematics»(ref-651040-S40183273182014081900000)

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

Automatic Day-Night Mirror Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(ref-651023-S06735791342014081900000)
  2. «Connector Repairs»(ref-651023-S36930316752014081900000)
  3. «Testing for Intermittent Conditions and Poor Connections»(ref-651023-S31795657182014081900000)
  4. «Wiring Repairs»(ref-651023-S35699655412014081900000)

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.

Perform the Diagnostic Repair Verification after completing the repair.

  1. «Inside Rearview Mirror Replacement»(ref-651040-S15056728882014081900000)
  2. «Outside Rearview Mirror Glass Replacement»(ref-651040-S22210492182014081900000)

Schematic Reference

Outside Rearview Mirror Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

Outside Mirror Description and Operation (Without A45) , Outside Mirror Description and Operation (With A45)

Electrical Information Reference

  1. «Circuit Testing»(ref-651023-S06735791342014081900000)
  2. «Connector Repairs»(ref-651023-S36930316752014081900000)
  3. «Testing for Intermittent Conditions and Poor Connections»(ref-651023-S31795657182014081900000)
  4. «Wiring Repairs»(ref-651023-S35699655412014081900000)

Scan Tool Reference

Control Module References for scan tool information

  1. Ignition ON.
  2. Verify the driver window moves while commanding the window UP and DOWN with the S79D Window Switch-Driver. If the window does not move UP and DOWN as commanded Refer to «Power Windows Malfunction (AXG, AED Without AEQ)»(ref-651039-S14045686132014081900000) , «Power Windows Malfunction (AXG, AED With AEQ)»(ref-651039-S26483677552014081900000) . If the window moves UP and DOWN as commanded
  3. 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 Replace the S79D Window Switch-Driver. If the parameter changes
  4. 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 Replace the S79D Window Switch-Driver. If the parameter changes
  5. Verify the A9A Outside Rearview Mirror-Driver and the A9B Outside Rearview Mirror-Passenger FOLD and UNFOLD when commanding the 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 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.

Perform the Diagnostic Repair Verification after completing the repair.

  1. «Front Side Door Window Control Switch Replacement»(ref-651039-S20785793632014081900000)
  2. «Front Side Door Window Switch Replacement - Right Side»(ref-651039-S02627117782014081900000)
  3. «Outside Rearview Mirror Replacement (Power)»(ref-651040-S13933984232014081900000) , «Outside Rearview Mirror Replacement (Manual)»(ref-651040-S27511822672014081900000)

Schematic Reference

Outside Rearview Mirror Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

Outside Mirror Description and Operation (Without A45) , Outside Mirror Description and Operation (With A45)

Electrical Information Reference

  1. «Circuit Testing»(ref-651023-S06735791342014081900000)
  2. «Connector Repairs»(ref-651023-S36930316752014081900000)
  3. «Testing for Intermittent Conditions and Poor Connections»(ref-651023-S31795657182014081900000)
  4. «Wiring Repairs»(ref-651023-S35699655412014081900000)
  1. Ignition ON.
  2. Verify the A9A Outside Rearview Mirror-Driver and the A9B Outside Rearview Mirror-Passenger 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.

Perform the Diagnostic Repair Verification after completing the repair.

  1. «Outside Rearview Mirror Remote Control Switch Replacement»(ref-651040-S04982658192014081900000)
  2. «Outside Rearview Mirror Replacement (Power)»(ref-651040-S13933984232014081900000) , «Outside Rearview Mirror Replacement (Manual)»(ref-651040-S27511822672014081900000)

Schematic Reference

Outside Rearview Mirror Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

Outside Mirror Description and Operation (Without A45) , Outside Mirror Description and Operation (With A45)

Electrical Information Reference

  1. «Circuit Testing»(ref-651023-S06735791342014081900000)
  2. «Connector Repairs»(ref-651023-S36930316752014081900000)
  3. «Testing for Intermittent Conditions and Poor Connections»(ref-651023-S31795657182014081900000)
  4. «Wiring Repairs»(ref-651023-S35699655412014081900000)
  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.

Perform the Diagnostic Repair Verification after completing the repair.

  1. «Outside Rearview Mirror Inner Actuator Replacement»(ref-651040-S08456349262014081900000)
  2. «Outside Rearview Mirror Remote Control Switch Replacement»(ref-651040-S04982658192014081900000)

Schematic Reference

Outside Rearview Mirror Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

Outside Mirror Description and Operation (Without A45) , Outside Mirror Description and Operation (With A45)

Electrical Information Reference

  1. «Circuit Testing»(ref-651023-S06735791342014081900000)
  2. «Connector Repairs»(ref-651023-S36930316752014081900000)
  3. «Testing for Intermittent Conditions and Poor Connections»(ref-651023-S31795657182014081900000)
  4. «Wiring Repairs»(ref-651023-S35699655412014081900000)

Scan Tool Reference

Control Module References for scan tool information

  1. Ignition ON.
  2. Verify the driver window moves while commanding the window UP and DOWN with the S79D Window Switch-Driver. If the window does not move UP and DOWN as commanded Refer to «Power Windows Malfunction (AXG, AED Without AEQ)»(ref-651039-S14045686132014081900000) , «Power Windows Malfunction (AXG, AED With AEQ)»(ref-651039-S26483677552014081900000) . If the window moves UP and DOWN as commanded
  3. 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 Replace the S79D Window Switch-Driver. If the parameter changes
  4. 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 Replace the S79D Window Switch-Driver. If the parameter changes
  5. 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
  6. 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
  7. 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
  8. 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
  9. 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
  10. 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
  11. All OK.

Perform the Diagnostic Repair Verification after completing the repair.

  1. «Outside Rearview Mirror Inner Actuator Replacement»(ref-651040-S08456349262014081900000)
  2. «Front Side Door Window Control Switch Replacement»(ref-651039-S20785793632014081900000)
  3. «Front Side Door Window Switch Replacement - Right Side»(ref-651039-S02627117782014081900000)

Schematic Reference

Outside Rearview Mirror Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

Outside Mirror Description and Operation (Without A45) , Outside Mirror Description and Operation (With A45)

Electrical Information Reference

  1. «Circuit Testing»(ref-651023-S06735791342014081900000)
  2. «Connector Repairs»(ref-651023-S36930316752014081900000)
  3. «Testing for Intermittent Conditions and Poor Connections»(ref-651023-S31795657182014081900000)
  4. «Wiring Repairs»(ref-651023-S35699655412014081900000)

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 (Without A45)»(ref-651040-S03140097012014081900000) , «Power Mirror Malfunction (With A45)»(ref-651040-S42708411842014081900000) . 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 (Without A45)»(ref-651040-S03140097012014081900000) , «Power Mirror Malfunction (With A45)»(ref-651040-S42708411842014081900000) . If the A9B Outside Rearview Mirror-Passenger moves RIGHT, LEFT, UP and DOWN
  4. 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 9

Scheme 9: Outside Rearview Mirror Replacement (Power)
CalloutComponent Name
Preliminary Procedures Remove the front side door front trim. Refer to Front Side Door Trim Replacement . Remove the front side door window garnish trim. Refer to Front Side Door Window Garnish Molding Replacement (Crew Cab, Extended Cab) , Front Side Door Window Garnish Molding Replacement (Regular Cab) .
1Outside Rearview Mirror Nuts (Qty: 3) CAUTION: Refer to Fastener Caution . Procedure Disconnect the electrical connector. Tighten 9 N.m (80 lb in)
2Outside Rearview Mirror NOTE: Inspect the outside mirror for proper operation before installing the door trim.
CAUTION
Refer to Fastener Caution .
NOTE
Inspect the outside mirror for proper operation before installing the door trim.

Outside Rearview Mirror Replacement (Power)

Scheme 10

Scheme 10: Outside Rearview Mirror Replacement (Manual)
CalloutComponent Name
Preliminary Procedures Remove the front side door front trim. Refer to Front Side Door Trim Replacement . Remove the front side door window garnish trim. Refer to Front Side Door Window Garnish Molding Replacement (Crew Cab, Extended Cab) , Front Side Door Window Garnish Molding Replacement (Regular Cab) .
1Outside Rearview Mirror Nuts (Qty: 3) CAUTION: Refer to Fastener Caution . Tighten 9 N.m (80 lb in)
2Outside Rearview Mirror NOTE: Inspect the outside mirror for proper operation before installing the door trim.
CAUTION
Refer to Fastener Caution .
NOTE
Inspect the outside mirror for proper operation before installing the door trim.

Outside Rearview Mirror Replacement (Manual)

Scheme 11

Scheme 11: Outside Rearview Mirror Arm Cover Replacement
CalloutComponent Name
Preliminary Procedure Remove the outside rearview mirror glass. Refer to Outside Rearview Mirror Glass Replacement . Remove the outside rearview mirror inner actuator. Refer to Outside Rearview Mirror Inner Actuator Replacement .
1Outside Rearview Mirror Arm Cover Procedure Firmly grasps the outside rearview mirror arm cover and lift upwards then outwards from the mirror to release the retainers.

Outside Rearview Mirror Arm Cover Replacement

Scheme 12

Scheme 12: Outside Rearview Mirror Remote Control Switch Replacement
CalloutComponent Name
Preliminary Procedure Remove the front side door accessory switch mount plate - driver side. Refer to Front Side Door Accessory Switch Mount Plate Replacement - Driver Side .
1Outside Remote Control Rearview Mirror Switch Assembly Procedure Release tabs on switch to remove from front side door accessory switch mount plate - driver side. Refer to Control Module References for programming and set up procedures.

Outside Rearview Mirror Remote Control Switch Replacement

Scheme 13

Scheme 13: Outside Rearview Mirror Inner Actuator Replacement
CalloutComponent Name
Preliminary Procedure Remove the outside rearview mirror glass. Refer to Outside Rearview Mirror Glass Replacement .
1Outside Rearview Mirror Inner Actuator Screws (Qty: 4) CAUTION: Refer to Fastener Caution . Procedure Disconnect the electrical connectors. Tighten 2 N.m (18 lb in)
2Outside Rearview Mirror Inner Actuator NOTE: Inspect the outside rearview mirror for proper operation.
CAUTION
Refer to Fastener Caution .
NOTE
Inspect the outside rearview mirror for proper operation.

Outside Rearview Mirror Inner Actuator Replacement

Scheme 14

Scheme 14: Outside Rearview Mirror Glass Replacement
CalloutComponent Name
1Outside Rearview Mirror Glass Retainers (Qty: 3) WARNING: Approved safety glasses and gloves should be worn when performing this procedure to reduce the chance of personal injury. Procedure Place masking tape over the mirror glass. Carefully push the outside rearview mirror glass upward and into the right corner of the mirror housing, allowing access to the bottom edge. Insert a suitable tool, between the lower housing and the mirror glass turn it clockwise releasing the mirror retainers from the mirror inner actuator motor. Grasp the bottom edge of the mirror glass firmly, lift it up and pull rearward until the mirror glass retainers release the actuator motor ring. Disconnect the outside mirror glass electrical connectors.
2Outside Rearview Mirror Glass Procedure Place the mirror glass in line with the lower inner actuator retainers. Place one hand on the back of the mirror housing, using the flat palm of the other hand press inward locking the mirror glass retainers to the inner actuator ring. Remove the masking tape from the mirror glass. NOTE: Inspect the outside rearview mirror for proper operation.
WARNING
Approved safety glasses and gloves should be worn when performing this procedure to reduce the chance of personal injury.
NOTE
Inspect the outside rearview mirror for proper operation.

Outside Rearview Mirror Glass Replacement

Scheme 15

Scheme 15: Outside Rearview Mirror Housing Replacement
CalloutComponent Name
1Outside Rearview Mirror Housing Procedure Firmly grasp mirror housing and lift upwards then outwards from the mirror to release the retainers. NOTE: Inspect the outside rearview mirror for proper operation.
NOTE
Inspect the outside rearview mirror for proper operation.

Outside Rearview Mirror Housing Replacement

Scheme 16

Scheme 16: Inside Rearview Mirror Replacement
CalloutComponent Name
1Inside Rearview Mirror Screw CAUTION: Refer to Fastener Caution . Procedure Remove the inside rearview mirror cover. Refer to Inside Rearview Mirror Wiring Harness Cover Replacement or Windshield Multifunction Sensor Mount Bracket Cover Replacement . Disconnect the electrical connector. Adjust the mirror to the full upward position. Loosen the set screw located at the base of the mirror. Tighten 1.8 N.m (16 lb in)
2Inside Rearview Mirror Procedure Slide the mirror upward off of the rearview mirror button. Refer to Control Module References for programming and setup information.
CAUTION
Refer to Fastener Caution .

Inside Rearview Mirror Replacement

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

The outside mirror switch and passenger window switch are on a serial data circuit with the memory seat module as the master. The mirror select and directional control switches are inputs to the memory seat module through the serial data circuit. When the memory seat module receives switch inputs from the outside mirror switch, mirror output commands are sent to the appropriate switch through the serial data circuit. The outside mirror switch and passenger window switch control the left and right outside rear view mirrors through bi-directional motor control circuits. The motor control circuits are floating while in an inactive state and the switches will apply power and ground to the control circuits as necessary to move the mirror in the commanded direction.

Mirror position is determined by both horizontal and vertical position sensors in each of the power mirrors. The outside mirror switch and passenger window switch supply a 5 V reference, low reference and horizontal and vertical position signal circuits to these sensors. The signal circuits are referenced from 5 V by the switches and the signal circuit voltage levels represent the mirror positions. The mirror positions are sent to the memory seat module through the serial data circuit where they are stored for memory mirror operation. When the memory seat module receives a memory recall command, the memory seat module will send the go to position commands to the outside mirror switch and passenger window switch. The switches will then drive the appropriate mirror motors to the commanded position sensor settings.

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.