GM Service Manual Online
For 1990-2009 cars only

Important Preliminary Checks Prior To The Starting

  1. Review the Keyless Entry System Description and Operation in order to familiarize yourself with the system functions. Refer to Keyless Entry System Description and Operation .
  2. Perform the Diagnostic System Check - Vehicle before using the Symptom Tables in order to verify that all of the following are true:
  3. • No DTCs are set.
    • The control modules can communicate via the serial data link.

Visual/Physical Inspection

    • Inspect for aftermarket devices which could affect the operation of the RCDLR system. Refer to Checking Aftermarket Accessories .
    • Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.

Intermittent Conditions

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:

    •  Keyless Entry System Inoperative
    •  Remote Vehicle Start Inoperative