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.
Diagnostic Procedures
2002 Chevrolet Venture LT, AWDSECTION Diagnostic Procedures
- Did you perform the Diagnostic System Check-Engine Controls? If yes, go to next step. If no, see DIAGNOSTIC SYSTEM CHECK - ENGINE CONTROLS under SELF-DIAGNOSTIC SYSTEM.
- Turn ON the ignition. Use a scan tool in order to command the AIR solenoid ON and OFF. Does the solenoid turn ON and OFF with each command? If yes, see DIAGNOSTIC AIDS . If no, go to next step.
- Turn OFF the ignition. Disconnect the solenoid. Turn ON the ignition. Probe the feed circuit with a test lamp that is connected to a good ground. Does the test lamp illuminate? If yes, go to next step. If no, go to step 10.
- Connect a test lamp between the control circuit and the feed circuit. Use a scan tool in order to command the AIR solenoid ON and OFF. Does the test lamp turn ON and OFF with each command? If yes, go to step 8. If no, go to next step.
- Does the test lamp remain illuminated with each command? If yes, go to step 7. If no, go to next step.
- Test the control circuit for a short to voltage or an open. Did you find and correct the condition? If yes, go to step 13. If no, go to step 9.
- Test the control circuit for a short to ground. Did you find and correct the condition? If yes, go to step 13. If no, go to step 9.
- Test for poor connections at the solenoid. Did you find and correct the condition? If yes, go to step 13. If no, go to step 11.
- Test for poor connections at the control module. Did you find and correct the condition? If yes, go to step 13. If no, go to step 12.
- Repair the open or short to ground in the feed circuit. After repairs, go to step 13.
- Replace the solenoid. Did you complete the replacement? After repairs, go to step 13.
- Replace the PCM. See appropriate REMOVAL, OVERHAUL & INSTALLATION article. Reprogram PCM. See POWERTRAIN CONTROL MODULE under PROGRAMMING. After repairs, go to next step.
- Clear the DTCs with a scan tool. Turn OFF the ignition for 30 seconds. Start the engine. Operate the vehicle within the Conditions for Running DTC as specified in the supporting text. Does the DTC run and pass? If yes, go to next step. If no, go to step 2.
- Observe the stored information, Capture Info with a scan tool. Does the scan tool display any DTCs that you have not diagnosed? If yes, see DIAGNOSTIC TROUBLE CODE DEFINITIONS . If no, system is okay.
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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.