For 1990-2009 cars

Important: Review the system operation in order to familiarize yourself with the system functions. Refer to the following information:

• | Keyless Entry System Description

• | Keyless Entry System Operation

• | Keyless Entry System Circuit Description

### Visual/Physical Inspection

• | Inspect for aftermarket devices which could affect the operation of the power mirrors and the power windows systems. Refer to Checking Aftermarket Accessories in Wiring Systems.

• | Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.

• | Inspect all related ground points for being clean and tight.

### Intermittent

Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

### Symptom List

Refer to a symptom diagnostic procedure from the following list in Doors in order to diagnose the symptom:

• | Power Door Locks Key Lock Switch Inoperative - One

• | Power Door Locks Actuator Motor Inoperative

• | Power Door Lock Switch Inoperative - Left Side or Right Side

• | Power Door Locks Inoperative