B2975
DTC B2975 or DrVENT sensor open is indicated: An Open in the Driver's Vent Air Temperature Sensor Circuit1. 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 B2975 or DrVENT sensor open indicated?
YES - Go to step 5.
NO - Intermittent failure, check for loose wires or poor connections on the driver's vent air temperature sensor circuit.
5. Turn the ignition switch OFF.
6. Remove the driver's vent air temperature sensor and test it.
Is the driver's vent air temperature sensor OK?
YES - Go to step 7.
NO - Replace the driver's vent air temperature sensor.
7. Disconnect the climate control unit 40P connector.
8. Check for continuity between the climate control unit 40P connector terminal No. 36 and the driver's vent air temperature sensor 2P connector terminal No. 1.
Is there continuity?
YES - Go to step 9.
NO - Repair open in the wire between the climate control unit and the driver's vent air temperature sensor.
9. Check for continuity between the climate control unit 40P connector terminal No. 33 and the driver's vent air temperature sensor 2P connector terminal No. 2.
Is there continuity?
YES - Check for loose wires or poor connections at the climate control unit 40P connector and at the driver's vent air temperature sensor 2P 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.
NO - Repair open in the wire between the climate control unit and the driver's vent air temperature sensor.