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.
2002 Chrysler Voyager ECFACTORY OEM SERVICE PROCEDURE
EVAP Temp Sensor Shorted
NOTE:
After making any repairs, perform BODY VERIFICATION TEST under VERIFICATION TESTS.
- Turn the ignition off. Disconnect the in-line C202 harness connector. See Figure. Turn the ignition on. With the DRBIII® in Automatic Temperature Control, monitor Active DTCs. If the DRBIII® displays: EVAP SENSOR OPEN, check the Evap Temp Sensor Signal circuit between the in-line C202 harness connector (plenum side) and the Evap Temp Sensor for a short to ground. Repair as necessary. If OK, replace the Evaporator Temperature Sensor. See appropriate AUTOMATIC A/C-HEATER SYSTEMS article in HVAC. With the DRBIII®, reset the ATC after repair/replacement is complete. If the DRBIII® does not display: EVAP SENSOR OPEN, go to the next step.
- Turn the ignition off. Disconnect the ATC C2 harness connector. See Figure. Disconnect the in-line C202 harness connector. See Figure. Measure the resistance between ground and the Evaporator Temperature Sensor Signal circuit (HVAC side). If the resistance is above 100 k/ohms, go to the next step. If the resistance is below 100 k/ohms, repair the Evaporator Temperature Sensor Signal circuit between the ATC C2 harness connector and the in-line C202 harness connector (HVAC side) for a short to ground. With the DRBIII®, reset the ATC after repair/replacement is complete.
- Turn the ignition off. Disconnect the ATC C2 harness connector. See Figure. Disconnect the in-line C202 harness connector. See Figure. Measure the resistance between the Evaporator Temperature Sensor Signal circuit and the Sensor Ground circuit (HVAC side). If the resistance is above 100 k/ohms, replace the ATC. See A/C-HEATER CONTROL PANEL under REMOVAL & INSTALLATION. With the DRBIII®, reset the ATC after repair/replacement is complete. If the resistance is below 100 k/ohms, repair the Evaporator Temperature Sensor Signal circuit between the ATC C2 harness connector and the in-line C202 harness connector (HVAC side) for a short to Sensor Ground. With the DRBIII®, reset the ATC after repair/replacement is complete.
Factory Service Tools
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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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