DTC C

DTC indicator C: An Open in the Outside Air Temperature Sensor Circuit

1. Remove the outside air temperature sensor.




2. Measure the resistance between the No. 1 and No. 2 terminals of the outside air temperature sensor.

*Dip the sensor in ice water, and measure resistance. Then pour hot water on the sensor, and check for a change in resistance.

Is the resistance within the specifications shown on the graph?

YES - Go to step 3.

NO - Replace the outside air temperature sensor.

3. Disconnect heater control panel connector B (22P).




4. Check for continuity between the No. 1 terminal of heater control panel connector B (22P) and the No. 1 terminal of the outside air temperature sensor 2P connector.

Is there continuity?

YES - Go to step 5.

NO - Repair open in the wire between the heater control panel and the outside air temperature sensor.




5. Check for continuity between the No. 5 terminal of heater control panel connector B (22P) and the No. 2 terminal of the outside air temperature sensor 2P connector.

Is there continuity?

YES - Check for loose wires or poor connections at heater control panel connector B (22P) and at the outside air temperature sensor 2P connector. If the connections are good, substitute a known-good heater control panel, and recheck. If the symptom/indication goes away, replace the original heater control panel.

NO - Repair open in the wire between the heater control panel and the outside air temperature sensor.