J and AUTO
DTC Troubleshooting: B1213 (J and AUTO)
DTC B1213 or DTC indicator J and AUTO:
An Open in the Rear Evaporator Temperature Sensor Circuit
1. Clear the DTCs with the HDS.
2. Turn the ignition switch to LOCK (0), and then back to ON (II).
3. Do the Self-Diagnostic Function with the HDS or the climate control unit.
4. Check for DTCs.
Is DTC B1213 or J and AUTO 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 Replacement (With Climate Control), and test it Rear Evaporator Temperature Sensor Test (With Climate Control).
Is the rear evaporator temperature sensor OK?
YES -
With the rear evaporator temperature sensor disconnected, go to step 7.
NO -
Replace the rear evaporator temperature sensor Rear Evaporator Temperature Sensor Replacement (With Climate Control).
7. Disconnect rear A/C control unit connector A (12P).
8. Check for continuity between rear A/C control unit connector A (12P) terminal No. 5 and rear evaporator temperature sensor 2P connector terminal No. 2.
Is there continuity?
YES -
Go to step 9.
NO -
Repair an open in the wire between the rear A/C control unit and the rear evaporator temperature sensor.
9. Check for continuity between rear A/C control unit connector A (12P) terminal No. 11 and rear evaporator temperature sensor 2P connector terminal No. 1.
Is there continuity?
YES -
Check for loose wires or poor connections at rear A/C control unit connector A (12P) and at the rear evaporator temperature sensor 2P connector. If the connections are good, substitute a known-good rear A/C control unit, and recheck. If the symptom/indication goes away, replace the original rear A/C control unit Rear A/C Control Unit Replacement.
NO -
Repair an open in the wire between the rear A/C control unit and the rear evaporator temperature sensor.