N

DTC Troubleshooting: B1213 or Indicator N

DTC B1213 or DTC indicator N: An Open in the Rear Evaporator Temperature Sensor Circuit

1. Clear the DTC with the HDS.

2. Turn the ignition switch to LOCK (0), and then to ON (II).

3. Do the self-diagnostic function with the HDS Initial Inspection and Diagnostic Overview or climate control unit. Initial Inspection and Diagnostic Overview

4. Check for DTCs.

Is DTC B1213 or N indicated?
YES - Go to step 5.

NO - Intermittent failure, check for loose wires or poor connections on the rear evaporator temperature sensor circuit.


5. Turn the ignition switch to LOCK (0).

6. Remove the rear evaporator temperature sensor, Rear Evaporator Temperature Sensor Test and test it. Rear Evaporator Temperature Sensor Replacement

Is the rear evaporator temperature sensor OK?
YES - Go to step 7.

NO - Replace the rear evaporator temperature sensor.


7. Disconnect climate control unit connector B (14P).

8. Check for continuity between climate control unit connector B (14P) terminal No. 6 and the rear evaporator temperature sensor 2P connector terminal No. 2.

Is there continuity?
YES - Go to step 9.

NO - Repair open in the wire between the climate control unit and the rear evaporator temperature sensor.






9. Check for continuity between climate control unit connector A (40P) terminal No. 8 and the rear evaporator temperature sensor 2P connector terminal No. 1.

Is there continuity?
YES - Check for loose wires or poor connections at climate control unit connector A (40P), B (14P), and at the rear 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 rear evaporator temperature sensor.