GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 2001 🢒 Aztek - FWD 🢒 Body and Accessories 🢒 Wiring Systems 🢒 Diagnostic System Check - Cruise Control

Diagnostic System Check - Cruise Control 3.4L

Test Description

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

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

  1. The presence of DTCs which begin with "U" indicate some other module is not communicating on the Class 2 Serial data circuit. The specified procedure will complete all the available information before tests are performed.

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 following control modules:
    3. • Body Control Module (BCM)
    • Electronic Brake Control Module (EBCM)
    • Powertrain Control Module (PCM)

Does the scan tool communicate with the control modules listed above?

Go to Step 3

Go to Scan Tool Does Not Communicate with Class 2 Device in Data Link Communications

3

Select the display DTCs function on the scan tool for the following control modules:

    • Body Control Module (BCM)
    • Electronic Brake Control Module (EBCM)
    • Powertrain Control Module (PCM)

Does the scan tool display any DTCs?

Go to Step 4

Go to Symptoms - Cruise Control

4

Does the scan tool display any DTCs which begin with a "U"?

Go to Scan Tool Does Not Communicate with Class 2 Device in Data Link Communications

Go to Step 5

5

Does the scan tool display DTC B0008, B1000 or B1440?

Go to Diagnostic Trouble Code (DTC) List in Body Control System

Go to Step 6

6

Does the scan tool display DTC B1328, B1507, B1508, P0560 or P0620?

Go to Diagnostic Trouble Code (DTC) List in Engine Electrical

Go to Diagnostic Trouble Code (DTC) List