Test Description
WARNING: This page is about a different car, the 2003 GMC Savana and 2003 Chevrolet Chevy Express. 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.