Power Mirror Folding Inoperative

Power Mirror Folding Inoperative

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.

Diagnostic Fault Information






Circuit/System Description

The Driver Door Switch (DDS) and Passenger Door Switch (PDS) control the power folding or power extending functions of the outside rearview mirrors. The folding mirror motors are controlled by using bi-directional motor controls through the folding mirror motor retract control circuit and the folding mirror motor extend control circuit.

Circuit/System Verification

1. Ignition ON, observe the scan tool Mirror Fold Switch parameter while cycling the mirror fold switch between the extend and retract positions. The parameter should change between Idle, Extend, and Retract.

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

2. Command the power folding mirrors to extend and retract using the mirror fold switch. Both mirrors should extend and retract as commanded.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector X7 at the appropriate door switch.
2. Ignition ON, verify a test lamp does not illuminate between the following circuit terminals and ground:

* Control circuit terminal 1
* Control circuit terminal 2

• If the test lamp illuminates, test the appropriate circuit for a short to voltage.

3. Ignition OFF, test for infinite resistance between the following circuits and ground:

* Control circuit terminal 1
* Control circuit terminal 2

• If less than the specified value, test the appropriate circuit for a short to ground. If the circuits test normal, test or replace the rearview mirror motor.

4. Test for 5-15 ohms of resistance between the control circuit terminal 1 and the control circuit terminal 2.

• If not within the specified range, test both control circuits for an open/high resistance. If the circuits test normal, test or replace the rearview mirror motor.

5. If all circuits test normal, replace the appropriate door switch.

Repair Instructions

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

* Outside Rearview Mirror Motor Replacement
* Control Module References for DDS or PDS replacement, setup, and programming Programming and Relearning