DTC C

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

NOTE: This code can cause the auto idle stop not to work.

1. Check to see if the outside air temperature sensor is connected.

Is the outside air temperature sensor connected?

YES - Go to step 2.

NO - Connect the sensor, clear the code and recheck.

2. Remove the outside air temperature sensor.




3. 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 warm 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 4.

NO - Replace the outside air temperature sensor.

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




5. 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 6.

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




6. 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.