2002 Chrysler Voyager ECFACTORY OEM SERVICE PROCEDURE

Rear Mode Door Not Responding

NOTE: After making any repairs, perform BODY VERIFICATION TEST  under VERIFICATION TESTS.
  1. Turn ignition switch to OFF position. Disconnect rear mode door actuator harness connector. Disconnect ATC module C1 connector. Check for short to ground in rear mode door driver "A" circuit. Using DVOM, measure resistance between ground and ATC module C1 connector terminal No. 9 (Light Blue wire). See Figure. If reading is less than 100 k/ohms, repair short to ground in Light Blue wire. Calibrate ATC module and actuators. See HVAC CONTROL CALIBRATION  under PROGRAMMING. If reading is 100 k/ohms or more, go to next step.
  2. Check for short to ground in rear mode door driver "B" circuit. Using DVOM, measure resistance between ground and ATC module C1 connector terminal No. 10 (Light Blue/Orange wire). See Figure. If reading is less than 100 k/ohms, repair short to ground in Light Blue/Orange wire. Calibrate ATC module and actuators. See HVAC CONTROL CALIBRATION  under PROGRAMMING. If reading is 100 k/ohms or more, go to next step.
  3. Check for short between rear mode door driver "A" and "B" circuits. Using DVOM, measure resistance between ATC module C1 connector terminals No. 9 (Light Blue wire) and No. 10 (Light Blue/Orange wire). See Figure. If reading is less than 100 k/ohms, repair short between Light Blue wire and Light Blue/Orange wire. Calibrate ATC module and actuators. See HVAC CONTROL CALIBRATION  under PROGRAMMING. If reading is 100 k/ohms or more, go to next step.
  4. Measure resistance in Light Blue wire between rear mode door actuator harness connector and ATC module C1 connector terminal No. 9. See Figure. If reading is less than 5 ohms, go to next step. If readings is 5 ohms or more, repair open in Light Blue wire. Calibrate ATC module and actuators. See HVAC CONTROL CALIBRATION  under PROGRAMMING.
  5. Measure resistance in Light Blue/Orange wire between rear mode door actuator harness connector and ATC module C1 connector terminal No. 10. See Figure. If reading is less than 5 ohms, go to next step. If readings is 5 ohms or more, repair open in Light Blue/Orange wire. Calibrate ATC module and actuators. See HVAC CONTROL CALIBRATION  under PROGRAMMING.
  6. Connect rear mode door actuator harness connector. Using DVOM, measure resistance between ATC module C1 connector terminals No. 9 (Light Blue wire) and No. 10 (Light Blue/Orange wire). See Figure. If reading is 26-46 ohms, replace faulty ATC module. Calibrate ATC module and actuators. See HVAC CONTROL CALIBRATION  under PROGRAMMING. If reading is not 26-46 ohms, go to next step.
  7. Replace faulty rear mode door actuator. Calibrate ATC module and actuators. See HVAC CONTROL CALIBRATION  under PROGRAMMING.
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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.