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 B2967 or A and WINDSHIELD DEFROST indicated?
YES -
Go to step 5.
NO -
Intermittent failure, check for loose wires or poor connections in the humidity sensor circuit.?
5. Turn the ignition switch to LOCK (0).
6. 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 7.
NO -
Replace the humidity/in-car temperature sensor See: Heating and Air Conditioning/Cabin Temperature Sensor / Switch/Service and Repair.?
7. Disconnect the humidity/in-car temperature sensor 4P connector.
8. Disconnect climate control unit connector A (40P).
9. Check for continuity between the following terminals of climate control unit connector A (40P) and the humidity/in-car temperature sensor
4P connector.
Is there continuity?
YES -
Check for loose wires or poor connections at climate control unit connector A (40P) and at the humidity/in-car temperature sensor 4P 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 See: Heating and Air Conditioning/Control Assembly/Service and Repair/Climate Control Unit Removal/Installation.?
NO -
Repair an open in the wire(s) between the climate control unit and the humidity sensor.?
