M and AUTO

DTC Troubleshooting: B2967 or Indicator M and AUTO

DTC B2967 or DTC indicator M and AUTO: An Open in the Humidity Sensor Circuit

1. 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 Initial Inspection and Diagnostic Overview or climate control unit. Initial Inspection and Diagnostic Overview

4. Check for DTCs.

Is DTC B2967 or M and AUTO indicated?
YES - Go to step 5.

NO - Intermittent failure. Check for loose wires or poor connections on the humidity sensor circuit.


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 the following terminals of climate control unit connector A (32P) and B (16P) and humidity/in-car temperature sensor 4P connector.









Is there continuity?
YES - Go to step 9.

NO - Repair open in the wire(s) between the climate control unit and the humidity/in-car temperature sensor.






9. Reconnect the humidity/in-car temperature sensor 4P connector.

10. Reconnect climate control unit connector A (32P) and B (16P).

11. Test the humidity temperature sensor. Humidity/In-car Temperature Sensor Test

Is the humidity sensor OK?
YES - Check for loose wires or poor connections at climate control unit connector A (32P) and B (16P) 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. Climate Control Unit Removal/Installation

NO - Replace the humidity/in-car temperature sensor. Service and Repair