Short
DTC Troubleshooting: B2968 (A and WINDSHIELD DEFROST)
DTC B2968 or DTC indicator A and WINDSHIELD DEFROST:
A Short in the Humidity 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 B2968 or A and WINDSHIELD DEFROST indicated?
YES -
Go to step 5.
NO -
Intermittent failure.?
5. Check for DTCs.
Are these DTCs also present; B1234 or K and AUTO, and/or B1237 or N and AUTO, and/or B1245 or G, and/or B2980 or B and WINDSHIELD
DEFROST?
YES -
Go to step 13.
NO -
Go to step 6.
6. Turn the ignition switch to LOCK (0).
7. Remove the humidity/in-car temperature sensor See: Heating and Air Conditioning/Cabin Temperature Sensor / Switch/Service and Repair,
and test it See: Heating and Air Conditioning/Testing and Inspection/Component Tests and General Diagnostics/Humidity/In-Car
Temperature Sensor Test.
Is the humidity sensor OK?
YES -
Go to step 8.
NO -
Replace the humidity/in-car temperature sensor See: Heating and Air Conditioning/Cabin Temperature Sensor / Switch/Service and Repair.?
8. Disconnect the humidity/in-car temperature sensor 4P connector.
9. Disconnect climate control unit connector A (40P).
10. Check for continuity between body ground and climate control unit connector A (40P) terminal No. 27.
