Initial Inspection and Diagnostic Overview

Important: Review the system in order to familiarize yourself with the system functions. Refer to
^ 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 auto trans shift lock control system. Refer to Checking Aftermarket Accessories in Diagrams/Diagnostic Aids.
^ 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 Connections in Diagrams/Diagnostic Aids.

Symptom List
Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom:
^ Automatic Transmission Shift Lock Control Inoperative (W/ Column Shifter) or Automatic Transmission Shift Lock Control Inoperative (W/ Console Shifter). With Column Shifter With Console Shifter
^ Automatic Transmission Shift Lock Control Always On with Ignition in Run (w/ Column Shifter) or Automatic Transmission Shift Lock Control Always On with Ignition in Run (wit Console Shifter). With Console Shifter With Column Shifter