Symptoms - Automatic Transmission Shift Lock Control. Chevrolet PJJ 2000

For 1990-2009 cars

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

1. Perform the Diagnostic System Check - Automatic Transaxle Shift Lock Control 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. Review the system operation in order to familiarize yourself with the system functions. Refer to AT Shift Lock Control Circuit Description.

### Visual/Physical Inspection

• | Inspect for aftermarket devices which could affect the operation of the AT Shift Lock Control. Refer to Checking Aftremarket 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 and Poor Conditions in Wiring Systems.

### Symptom List

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

• | Automatic Transaxle Shift Lock Control Inoperative

• | Automatic Transaxle Shift Lock Control Always On with Ignition in Run