Blazer 4WD V6-4.3L VIN X (2005)
Steps 49-50
The numbers below refer to the step numbers on the diagnostic table.
3. This step is testing for a CKP sensor signal to the PCM.
4. This step is testing for an internally shorted CMP sensor.
9. This step is testing for spark output at more than one spark plug wire. The J 26792 Spark Tester requires a minimum of 25,000 volts to operate.
10. This step determines if spark is being delivered to the distributor cap.
20. This test is testing if the PCM is providing a timing control signal to the ICM.
21. This test checks for a basic engine mechanical problem.
