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Evaporator Temperature Sensor Circuit Short (Active)

NOTE: After making any repairs, perform BODY VERIFICATION TEST  under VERIFICATION TESTS.
  1. Turn ignition switch to OFF position. Open glove box door and remove items. Disconnect glove box door roller latch from each side of glove box. Roll glove box downward toward floor. Disconnect in-line harness connector C202. See Figure. Turn ignition switch to ON position. Using scan tool, select SENSOR DISPLAY, then read EVAPORATOR TEMPERATURE SENSOR. If reading is less than 5 volts, go to next step. If reading is 5 volts or greater, check for a short to ground evaporator temperature sensor signal circuit between evaporator temperature sensor connector and in-line C202 connector (body side) terminal No. 12 (Dark Blue/Light Green wire). See Figure. Repair Dark Blue/Light Green wire as necessary. If short to ground does not exist, replace evaporator temperature sensor.
  2. Turn ignition switch to OFF position. Disconnect HVAC control module C1 harness connector. See Figure. Disconnect in-line harness connector C202. See Figure and Figure . Using DVOM, measure resistance between ground and in-line connector C202 (HVAC side) terminal No. 12 (Dark Blue/Light Green wire). If resistance is 10 k/ohms or greater, go to next step. If resistance is less than 10 k/ohms, repair short to ground in Dark Blue/Light Green wire between C202 in-line connector and HVAC control module C1 connector.
  3. Turn ignition switch to OFF position. Using DVOM, measure resistance between evaporator temperature sensor ground and sensor signal circuits. Measure HVAC side of in-line connector C202 between terminals No. 12 (Dark Blue/Light Green wire) and No. 13 (Dark Blue/Dark Green wire). See Figure. If resistance is 10 k/ohms or greater, replace HVAC control module. If resistance is less than 10 k/ohms, repair short between evaporator temperature sensor signal and sensor ground circuits in wiring harness between in-line connector C202 (HVAC side) and HVAC control module.
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