For 1990-2009 cars

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

1. Perform the Diagnostic System Check - Vehicle before using the symptom tables in order to verify that all of the following are true:

• | There are no DTCs set.

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

2. Refer to the system description and operation from the following list in order to familiarize yourself with the system functions:

• | Power Seats System Description and Operation

• | Lumbar Support Description and Operation

• | Heated/Vented Seat Description and Operation

• | Memory Seats Description and Operation

### Visual/Physical Inspection

• | Inspect for aftermarket devices which could affect the operation of the power seats. Refer to Checking Aftermarket Accessories .

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

• | Inspect the seat adjuster track for conditions which may cause binding or objects within the seat adjustment range which obstruct movement or interfere with wiring.

### Intermittent

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

### Symptom List

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

• | Power Seat Inoperative

• | Lumbar Support Inoperative

• | Vented Seat Inoperative

• | Vented Seat Always On

• | Heated Seat Always On

• | Heated Seat Inoperative

• | Heated Seat Always On - Rear

• | Heated Seat Inoperative - Rear

• | Rear Seat Heater Switch Indicator Malfunction