Initial Inspection and Diagnostic Overview

Symptoms - Computer/Integrating Systems

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


1. Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle before using the Symptom tables in order to verify that there are no DTCs set.
2. Review the system operation in order to familiarize yourself with the system functions.

Visual/Physical Inspection

* Inspect for aftermarket devices which could affect the operation of the Theft Deterrent System. Refer to Checking Aftermarket Accessories Checking Aftermarket Accessories.
* Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.
* Inspect that the transmitter is the correct model for the vehicle. An incorrect model will not operate the Theft Deterrent System.

Intermittent

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

Symptom List

Refer to the following list in order to diagnose the symptom:

* Scan Tool Does Not Power Up Scan Tool Does Not Power Up
* Scan Tool Does Not Communicate with CAN Device Scan Tool Does Not Communicate with CAN Device