Diagnostic Instructions
| • | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
| • | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
| • | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
Diagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
B+ | 1 | 1 | -- | -- |
Left/Right Mirror Horizontal Motor Control | 1 | 1 | -- | -- |
Left/Right Mirror Vertical Motor Control | 1 | 1 | -- | -- |
Left/Right Mirror Motor Common Control | 1 | 1 | -- | -- |
Ground | -- | 1 | -- | -- |
1. Power Mirror Malfunction | ||||
Circuit/System Description
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 and when a movement position switch is selected, B+ is sent to the mirror via a motor control circuit. The opposite motor control circuit acts as a ground circuit for the bi-directional mirror motor.
Reference Information
Schematic Reference
Outside Rearview Mirror Schematics
Connector End View Reference
Description and Operation
Outside Mirror Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
- Ignition ON, with the mirror selector switch in the DRIVER position, command the mirrors UP, DOWN, LEFT, and RIGHT using the mirror directional switch. The driver mirror should move in the commanded direction.
- Ignition ON, with the mirror selector switch in the PASSENGER position, command the mirrors UP, DOWN, LEFT, and RIGHT using the mirror directional switch. The passenger mirror should move in the commanded direction.
Circuit/System Testing
- Ignition OFF, disconnect the harness connector at the outside rearview mirror switch.
- Ignition OFF for 1 minute, test for less than 10 ohms between the ground circuit terminal B and ground.
- Verify that a test lamp illuminates between the B+ circuit terminal G and ground.
- Connect the harness connector at the outside rearview mirror switch.
- Disconnect the harness connector at the appropriate outside rearview mirror.
- Connect a test lamp between the control circuit terminal B and the control circuit terminal C.
- Operate the vertical switch UP and DOWN. The test lamp should turn ON when commanding the UP and DOWN states.
- Connect a test lamp between the control circuit terminal A and the control circuit terminal C.
- Operate the horizontal switch LEFT and RIGHT. The test lamp should turn ON when commanding the LEFT and RIGHT states.
- If all circuits test normal, test or replace the outside rearview mirror motor.
| ⇒ | If greater than the specified range, test the ground circuit for an open/high resistance. |
| ⇒ | If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance. |
| ⇒ | 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 the control circuits. If the circuits test normal, replace the power mirror switch. |
| ⇒ | 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 the control circuits. If the circuits test normal, replace the power mirror switch. |
Component Testing
- Ignition OFF, disconnect the harness connector at the outside rearview mirror switch.
- Test for infinite resistance between all of the control terminals and B+ terminal G with the switch in the neutral position.
- Test for infinite resistance between all of the control terminals and ground circuit with the switch in the neutral position.
| ⇒ | If less than infinite resistance, replace the rearview mirror switch. |
| ⇒ | If less than infinite resistance, replace the rearview mirror switch. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
