Initial Inspection and Diagnostic Overview

IMPORTANT: Review the system operation in order to familiarize yourself with the system functions. Refer to the following:
- Automatic Transmission Shift Lock Control Circuit Description
- Automatic Transmission Shift Lock Control Description

VISUAL/PHYSICAL INSPECTION
- Inspect for aftermarket devices which could affect the operation of the system. Refer to Diagnostic Aids.
- 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 Diagnostic Aids.

SYMPTOM LIST
Diagnostic Aid symptom diagnostic procedure from the following list in order to diagnose the symptom:
- Automatic Transmission Shift Lock Control Inoperative
- Automatic Transmission Shift Lock Control Always On with Ignition in Run