Test Description
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2003 GMC Sonoma, 2003 GMC Safari, 2003 GMC Jimmy, 2003 Chevrolet S10 Pickup, and 2003 Chevrolet Blazer. However, it is still accessible from the selected car via links, so may be relevant.
The number below refers to step number on diagnostic procedure.
- 3 - This step is testing for a CKP sensor signal to PCM.
- 4 - This step is testing for an internally shorted camshaft position sensor.
- 9 - This step is testing for spark output at more than one spark plug wire. The Spark Tester (J-26792) requires a minimum of 25,000 volts to operate.
- 10 - This step determines if spark is being delivered to distributor cap.
- 20 - This test is testing if PCM is providing a timing control signal to ignition control module.
- 21 - This test checks for a basic engine mechanical problem.