B2975

DTC Troubleshooting: B2975 (DrVENT sensor open)

DTC B2975 or DrVENT sensor open is indicated:

An Open in the Driver's Vent Air Temperature Sensor Circuit

1. Clear the DTC with the HDS.

2. Turn the ignition switch to LOCK (0), and then back to ON (II).

3. Do the self-diagnostic with the HDS or the 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 to LOCK (0).

6. Remove the driver's vent air temperature sensor Driver's Vent Air Temperature Sensor Replacement and test it Vent Air Temperature Sensor Test.

Is the driver's vent air temperature sensor OK?

YES -

With the driver's vent air temperature sensor disconnected, go to step 7.

NO -

Replace the driver's vent air temperature sensor Driver's Vent Air Temperature Sensor Replacement.�

7. Disconnect the climate control unit 40P connector.

8. Check for continuity between climate control unit 40P connector terminal No. 36 and driver's vent air temperature sensor 2P connector terminal No. 1.





Is there continuity?

YES -

Go to step 9.

NO -

Repair an open in the wire between the climate control unit and the driver's vent air temperature sensor.�

9. Check for continuity between climate control unit 40P connector terminal No. 33 and 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 Climate Control Unit Removal/Installation.�

NO -

Repair an open in the wire between the climate control unit and the driver's vent air temperature sensor.�