B2968

DTC B2968 or DTC indicator N and AUTO: A Short in the Humidity Sensor Circuit

1. Clear the DTC with the HDS.
2. Turn the ignition switch OFF, and then ON (II).
3. Do the self-diagnostic with the HDS or climate control unit.
4. Check for DTCs.

Is DTC B2968 or N and AUTO indicated?

YES - Go to step 5.

NO - Intermittent failure.

5. Turn the ignition switch OFF.
6. Disconnect climate control unit connector A (32P) and B (16P).
7. Disconnect the humidity/in-car temperature sensor 4P connector.




8. Check for continuity between body ground and climate control unit connector A (32P) terminal No. 7, and between climate control unit connector B (16P) terminal No. 1 and body ground.

Is there continuity?

YES - Repair any short to body ground in the wires between the climate control unit and the humidity/in-car temperature sensor.

NO - Go to step 9.




9. Check for continuity between terminals of climate control unit connector A (32P) and B (16P) as. follows.

Is there continuity between any of the terminals?

YES - Repair the short in the wires.

NO - Go to step 10.




10. Turn the ignition switch ON (II), and check the same terminals for voltage to body ground.

Is there any voltage?

YES - Repair short to power in the wire(s) between the climate control unit and the humidity/in-car temperature sensor. This short may also damage the climate control unit. Repair the short to power before replacing the climate control unit.

NO - Go to step 11.

11. Reconnect the humidity/in-car temperature sensor 4P connector.
12. Reconnect climate control unit connector A (32P) and B (16P).
13. Test the humidity temperature sensor.

Is the humidity temperature sensor OK?

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

NO - Replace the humidity/in-car temperature sensor.