Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Test Description
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.
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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