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.
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HOMESERVICE MANUALSPLYMOUTH1994GRAND VOYAGER BASE, 31THREPAIR AND DIAGNOSISENGINE PERFORMANCETESTING & DIAGNOSISENGINE CONTROLS - TESTS W/CODES - 3.3L CNGVERIFICATION TESTSTEST VER-2 - ROAD TEST VERIFICATION
1994 Plymouth Grand Voyager Base, 31TH
Test VER-2 - Road Test Verification
1994 Plymouth Grand Voyager Base, 31THSECTION Test VER-2 - Road Test Verification
- Check vehicle to ensure all engine components are connected. Reassemble and reconnect components as necessary. If more than one trouble code is present and have not been diagnosed, go to TEST TC-1A and diagnose other trouble codes. If Powertrain Control Module (PCM) has not been replaced, connect DRB to data link connector and erase trouble codes.
- Using DRB, reset all values in adaptive memory. Disconnect DRB. To ensure no other trouble codes are present, turn on A/C and blower (if equipped) and drive vehicle at least 5 minutes (attaining a speed of 40 MPH). Ensure transmission shifts through all gears. When road test is complete, turn ignition off.
- Start engine and operate at idle for 2 minutes. Turn engine off. Using DRB, read trouble codes. Using DRB, read trouble codes. If previously repaired trouble codes reset, repair is not complete. Check all related Tech Service Bulletins (TSBs), perform corrective action as necessary, and go to TEST TC-1A as necessary. If a new trouble code message is present, go to TEST TC-1A and diagnose other trouble codes. If no trouble codes are present, repair is now complete.
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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.