DTC Troubleshooting: 14

DTC 14:  A Short in the Evaporator Temperature Sensor Circuit

1.Disconnect the evaporator temperature sensor 2P connector.

2.Test the evaporator temperature sensor.

Is the resistance within the specifications shown on the graph?


YES - Go to 3.


NO - Replace   the   evaporator   temperature   sensor.n


3.Disconnect the negative cable from the battery.

4.Disconnect ECM/PCM connector E (31P).

5.Disconnect climate control unit connector B (16P).

6.Check for continuity between the No. 12 terminal of ECM/PCM connector E (31P) and body ground.

 

Is there continuity?


YES - Repair short to body ground in the wire between the ECM/PCM, the climate control unit and the  evaporator temperature sensor.n


NO - Go to 7.


7.Reconnect ECM/PCM connector E (31P).

8.Turn the ignition switch ON (II).

9.Measure the voltage between the No.12 terminal of ECM/PCM connector E (31P) and body ground with the ECM/PCM connectors connected.

 

Is there about 5 V ?


YES - Substitute a known-good  climate control unit, and recheck. If the symptom/indication goes away, replace the original  climate control unit.n


NO - Substitute a known-good  ECM/ PCM, and recheck. If the symptom/indication goes away, replace the original  ECM/ PCM.n