Check for continuity between the No. 2 terminal of climate control unit connector A (14P) and the No. 1 terminal of the evaporator temperature sensor 2P connector. CLIMATE CONTROL UNIT CONNECTOR A (14P) Wire side of female terminals EVAPORATOR TEMPERATURE SENSOR 2P CONNECTOR Wire side of female terminals Is there continuity? YES - Check for loose wires or poor connections at climate control unit connectors A (14P) and B (22P) and at the evaporator temperature sensor 2P connector. If the connections are good, substitute a known-good climate control unit and recheck. If the symptom/indication goes away, replace the original climate control unit. NO - Repair open in the wire between the climate control unit and the evaporator temperature sensor.

4-door DTC 15: A Short in the Evaporator Temperature Sensor Circuit Disconnect the evaporator temperature sensor 2P connector. Test the evaporator temperature sensor (see step 2 on page 21-126). Is the resistance within the specifications shown on the graph? YES - Go to step 3. NO - Replace the evaporator temperature sensor. Disconnect climate control unit connector B (22P). Check for continuity between the No. 7 terminal of climate control unit connector B (22P) and body ground. CLIMATE CONTROL UNIT CONNECTOR B (22P) Wire side of female terminals Is there continuity? YES - Repair short to body ground in the wire between the climate control unit and the evaporator temperature sensor. NO - Substitute a known-good climate control unit and recheck. If the symptom/indication goes away, replace the original climate control unit.