Power Mirrors Inoperative (w/ DS3)

Power Mirrors Inoperative (w/ DS3)

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Initial Inspection and Diagnostic Overview
* Review Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions provides an overview of each diagnostic category.

Circuit/System Description

The Driver Door Switch (DDS) or Passenger Door Switch (PDS) controls the mirror horizontal and vertical motors through the use of bi-directional motor controls. When the mirror is commanded up and down, voltage or ground is supplied to the mirror vertical motor through the mirror motor up/down control circuit and voltage or ground is supplied through the mirror motor common circuit.

Horizontal controls operate in the same manner with the mirror motor left/right control circuit supplying voltage or ground and the mirror motor common circuit suppling voltage or ground to the mirror horizontal motor when the mirror is commanded right and left.

Circuit/System Verification

1. 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 Idle, Right, and Left.

^ If the parameter does not cycle between the specified values, replace the DDS.

2. Observe the scan tool Mirror Motor parameter while cycling the mirror directional switch between the up, down, left and right positions. The parameter should change between Idle, Up, Down, Left, and Right.

^ If the parameter does not cycle between the specified values, replace the DDS.

3. Command the left and right outside mirror to move up, down, left and right using the mirror directional switch. The mirror should move in the commanded direction.

Circuit/System Testing

1. Ignition OFF, disconnect the X1 harness connector at the outside rearview mirror.
2. Install a test lamp between the control circuit terminal 2 and the control circuit terminal 6.
3. Ignition ON, commanded the mirror left and right using the mirror directional switch. The test lamp should turn ON and OFF as the mirror commanded to the left and right.

^ If the test lamp does not turn ON and OFF when cycling between the commanded states, test both control circuit for a short to voltage, a short to ground, or an open/high resistance. If the circuits test normal, replace the applicable door switch.

4. Ignition OFF, install a test lamp between the control circuit terminal 1 and the control circuit terminal 6.
5. Ignition ON, commanded the mirror up and down using the mirror directional switch. The test lamp should turn ON and OFF as the mirror commanded up and down.

^ If the test lamp does not turn ON and OFF when cycling between the commanded states, test both control circuit for a short to voltage, a short to ground, or an open/high resistance. If the circuits test normal, replace the applicable door switch.

6. If all circuits test normal, test or replace the outside rearview mirror motor.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure. Verification Tests

* Outside Rearview Mirror Motor Replacement