For 1990-2009 cars

### 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
--- | --- | --- | --- | ---
Folding Mirror Motor Retract Control | B1722 02 | 1 | B1722 01 | --
Folding Mirror Motor Extend Control | B1722 02 | 1 | B1722 01 | --
1. Power Folding Mirror Inoperative

### 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.

### Reference Information

#### Schematic Reference

Outside Rearview Mirror Schematics

#### Connector End View Reference

Component Connector End Views

#### Description and Operation

Outside Mirror Description and Operation

#### Electrical Information Reference

• | Circuit Testing

• | Connector Repairs

• | Testing for Intermittent Conditions and Poor Connections

• | Wiring Repairs

#### Scan Tool Reference

Control Module References for scan tool information

### Circuit/System Verification

1. Ignition ON, observe the scan tool DDS 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 X1 harness connector at the outside rearview mirror.
2. Connect a test lamp between the control circuit terminal 1 and the control circuit terminal 2.
3. Command the mirrors to extend and retract using the power folding switch. The test lamp turn ON and OFF when changing between the commanded states.

⇒ | If the test lamp is always ON, test both control circuits for a short to voltage. If the circuit tests normal, replace the appropriate door switch.

⇒ | If the test lamp is always OFF, test both control circuits for a short to ground or an open/high resistance. If the circuit tests normal, replace the door switch.

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

### Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

• | Power Mirror Replacement

• | Control Module References for DDS or PDS replacement, setup, and programming