GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Saturn 🢒 2003 🢒 ION 🢒 Body and Accessories 🢒 Lighting Systems 🢒 Diagnostic System Check - Cruise Control

Test Description

The numbers below refer to the step numbers on the diagnostic table.

  1. Lack of communication may be due to a partial malfunction of the class 2 serial data circuit or due to a total malfunction of the class 2 serial data circuit. The specified procedure will determine the particular condition.

    2.

  2. The symptom list in Symptoms will determine the correct diagnostic procedure to use.

Step

Action

Yes

No

1

Install a scan tool.

Does the scan tool power up?

Go to Step 2

Go to Scan Tool Does Not Power Up in Data Link Communications

2

  1. Turn ON the ignition, with the engine OFF.
  2. Attempt to establish communication with the Engine Control Module.

Does the scan tool communicate with the Engine Control Module?

Go to Step 3

Go to Scan Tool Does Not Communicate with CAN Device in Data Link Communications

3

Select the ECM display DTC function on the scan tool.

Does the scan tool display any cruise control DTCs?

Go to Scan Tool Data List in Cruise Control

Go to Symptoms - Cruise Control