B2968
DTC B2968 or DTC indicator N and AUTO: A Short in the Humidity Sensor Circuit1. Clear the DTC with the HDS.
2. Turn the ignition switch to LOCK (0), and then turn to 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 to LOCK (0).
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) No. 7 terminal, and between climate control unit connector B (16P) No. 1 terminal and body ground.
Is there continuity?
YES - Repair 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 to ON (II), and measure 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.