For 1990-2009 cars

Important: The following steps must be completed before using the symptom tables.

1. Perform Diagnostic System Check - Power Seat Systems before using the Symptom Tables in order to verify that all of the following are true:

• | There are no DTCs set.

• | The control module can communicate via the serial data link.

2. Review the system operation in order to familiarize yourself with the system functions.

• | Refer to Power Seats Circuit Description

• | Refer to Power Seats Description

• | Refer to Front Seats Description

• | Refer to Rear Seats Description

• | Refer to Heated Seats Operation

• | Refer to Heated Seats Circuit Description

• | Refer to Memory Seat Description

• | Refer to Memory Seat Operation

• | Refer to Memory Seat Circuit Description

### Visual/Physical Inspection

• | Inspect for aftermarket devices which could affect the operation of the Power Seat 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.

### 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 order to diagnose the symptom:

• | Heated Seat Inoperative

• | Heated Seat Always On

• | Heated Seat Inoperative - Rear

• | Heated Seat Always On - Rear

• | Power Seat Adjuster Does Not Move Horizontally

• | Power Seat Adjuster Does Not Move Vertically

• | Power Seat Inoperative

• | Power Seat Does Not Recline

• | Power Seats - Memory Switch Inoperative