Power Mirror Malfunction (with AAB)
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Power Mirror Malfunction (with AAB)
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Diagnostic Fault Information
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Circuit
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Short to Ground
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Open/High Resistance
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Short to Voltage
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Signal Performance
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Outside Rearview Mirror Switch 5 V Reference
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1
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1
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1
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-
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Position Sensor 5 V Reference
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1
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1
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1
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-
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Left/Right Mirror Horizontal Position Sensor Signal
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1
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1
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1
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-
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Left/Right Mirror Vertical Position Sensor Signal
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1
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1
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1
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-
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Left/Right Mirror Motor Horizontal Control
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1
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1
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1
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-
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Left/Right Mirror Motor Common Control
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1
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1
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1
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-
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Left/Right Mirror Motor Vertical Control
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1
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1
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1
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-
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Low Reference Position Sensors
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-
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1
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-
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-
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Low Reference Rearview Mirror Switch
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-
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1
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-
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-
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1. Power Mirror Malfunction
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Circuit/System Description
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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 AAB)
Outside Mirror Description and Operation (With AAB)
Electrical Information Reference
Scan Tool Reference
Control Module References
for scan tool information
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Circuit/System Verification
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1.
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Ignition ON, observe the scan tool Mirror Select Switch parameter while cycling the mirror select switch between the left and right positions. The parameter should change between None, Right, and Left.
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2.
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If the parameter does not cycle between the specified values, refer to Mirror Switch Circuit Test.
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3.
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Observe the scan tool Mirror Direction Switch parameter while cycling the mirror directional switch between the up, down, left and right positions. The parameter should change between Inactive, Up, Down, Left, and Right.
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4.
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If the parameter does not cycle between the specified values, refer to Mirror Switch Circuit Test.
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5.
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Command the driver and passenger mirrors UP/DOWN and RIGHT/LEFT with a scan tool. Verify the mirrors move in the commanded directions.
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6.
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If a mirror does not move in all the commanded directions refer to Mirror Motor Circuit Test.
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7.
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Operate the 1 and 2 memory recall switches. The outside rearview mirrors should adjust to the stored memory positions.
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8.
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If a mirror does not adjust to the stored memory position refer to Mirror Position Sensor Circuit Test-Driver or Mirror Position Sensor Circuit Test-Passenger.
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Mirror Switch Circuit Test
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1.
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Ignition OFF, disconnect the harness connector at the S52 outside rearview mirror switch.
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2.
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Doors closed, wait 1 minute, test for less than 10 Ω between the low reference terminal 11 and ground.
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3.
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If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the K96L left mirror control module.
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4.
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Ignition ON, test for 4.8-5.2 V between the 5 V reference circuit terminal 5 and ground.
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5.
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If less than the specified range, test the 5 V reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K96L left mirror control module.
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6.
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If greater than the specified range, test the 5 V reference circuit for a short to voltage. If the circuit tests normal, replace control module of the K96L left mirror.
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7.
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Ignition ON, test for 4.8-5.2 V between the 5 V reference circuit terminal 12 and ground.
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8.
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If less than the specified range, test the 5 V reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K96L left mirror control module.
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9.
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If greater than the specified range, test the 5 V reference circuit for a short to voltage. If the circuit tests normal, replace control module of the K96L left mirror.
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10.
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Ignition ON, test for 4.8-5.2 V between the 5 V reference circuit terminal 6 and ground.
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11.
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If less than the specified range, test the 5 V reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K96L left mirror control module.
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12.
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If greater than the specified range, test the 5 V reference circuit for a short to voltage. If the circuit tests normal, replace control module of the K96L left mirror.
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13.
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If all circuits test normal, test or replace the S52 outside rearview mirror switch.
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Mirror Motor Circuit Test
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1.
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Ignition OFF, disconnect the X2 harness connector at the appropriate A9 outside rearview mirror.
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2.
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Connect a test lamp between the control circuit terminal 3 and the control circuit terminal 1.
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3.
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Ignition ON, command the mirror LEFT and RIGHT with a scan tool. The test lamp should turn ON when commanding the LEFT and RIGHT states.
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4.
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If the test lamp remains OFF during either of the commands, test for a short to voltage, short to ground or an open/high resistance on either control circuit. If the circuits test normal, replace the switch/module.
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•
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K96 mirror control module
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S79P passenger window switch
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5.
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Connect a test lamp between the control circuit terminal 1 and the control circuit terminal 2.
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6.
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Ignition ON, command the mirror UP and DOWN with a scan tool. The test lamp should turn ON when commanding the UP and DOWN states.
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7.
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If the test lamp remains OFF during either of the commands, test for a short to voltage, short to ground or an open/high resistance on either control circuits. If the circuits test normal, replace the switch/module.
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K96 mirror control module
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S79P passenger window switch
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8.
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If all circuits test normal, test or replace the outside rearview mirror inner actuator.
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Mirror Position Sensor Circuit Test-Driver
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1.
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Ignition OFF, disconnect the X2 harness connector at the A9A outside rearview mirror.
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2.
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Doors closed, wait 3 minutes, test for less than 10 Ω between the low reference circuit terminal 3 and ground.
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3.
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If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the K96 mirror control module.
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4.
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Ignition ON, test for 4.6-5.4 V between the 5 V reference circuit terminal 1 and ground.
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5.
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If less than the specified range, test the 5 V reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K96 mirror control module.
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6.
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If greater than the specified range, test the 5 V reference circuit for a short to voltage. If the circuit tests normal, replace the control module of the K96 mirror.
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7.
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Verify the scan tool Mirror Vertical Position parameter is greater than 4.6 V.
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8.
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If lower than the specified range, test the reference circuit for a short to ground in the signal circuit pin 4. If the circuit tests normal, replace the control module of the K96 mirror.
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9.
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Verify the scan tool Mirror Horizontal Position parameter is greater than 4.6 V.
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10.
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If less than the specified range, test the signal circuit for a short to ground. If the circuit tests normal, replace the K96 mirror control module.
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11.
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Install a 3 A fused jumper wire between the signal circuit terminal 4 and the low reference circuit terminal 3. Verify the scan tool Mirror Vertical Position parameter is less than 0.4 V.
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12.
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If greater than the specified range, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K96 mirror control module.
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13.
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Install a 3 A fused jumper wire between the signal circuit terminal 2 and the low reference circuit terminal 3. Verify the scan tool Mirror Horizontal Position parameter is less than 0.4 V.
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14.
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If greater than the specified range, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K96 mirror control module.
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15.
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If all circuits test normal, test or replace the outside rearview mirror inner actuator.
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Mirror Position Sensor Circuit Test-Passenger
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1.
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Ignition OFF, disconnect the X2 harness connector at the A9B outside rearview mirror.
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2.
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Doors closed, wait 3 minutes, test for less than 10 Ω between the low reference circuit terminal 3 and ground.
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3.
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If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the S79P passenger window switch.
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4.
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Ignition ON, test for 4.6-5.4 V between the 5 V reference circuit terminal 1 and ground.
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5.
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If less than the specified range, test the 5 V reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the S79P passenger window switch.
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6.
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If the parameter is greater than the specified range, test the 5 V reference circuit for a short to voltage. If the circuit tests normal, replace the S79P passenger window switch.
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7.
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Verify the scan tool Mirror Vertical Position parameter is less than 0.4 V.
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8.
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If the value is greater than the specified range, test for a short to voltage in reference circuit 4. If the circuit tests normal, replace the S79P passenger window switch.
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9.
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Verify the scan tool Mirror Horizontal Position parameter is less than 0.4 V.
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10.
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If the value is greater than the specified range, test for a short to voltage in reference circuit 2. If the circuit tests normal, replace the S79P passenger window switch.
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11.
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Install a 3 A fused jumper wire between the signal circuit terminal 4 and the low reference circuit terminal 3. Verify the scan tool Mirror Vertical Position parameter is more than 4.6 V.
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12.
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If less than the specified range, test the signal circuit for a short to ground or open/high resistance. If the circuit tests normal, replace the S79P passenger window switch.
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13.
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Install a 3 A fused jumper wire between the signal circuit terminal 2 and the low reference circuit terminal 3. Verify the scan tool Mirror Horizontal Position parameter is more than 4.6 V.
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14.
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If less than the specified range, test the signal circuit for a short to ground or open/high resistance. If the circuit tests normal, replace the S79P passenger window switch.
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15.
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If all circuits test normal, test or replace the outside rearview mirror inner actuator.
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Perform the
Diagnostic Repair Verification
after completing the diagnostic procedure.
