L and AUTO

DTC Troubleshooting: B1236 (L and AUTO)

DTC B1236 or DTC indicator L and AUTO:

An Open in the Passenger's Air Mix Control Motor Circuit

1. Clear the DTC by turning the ignition switch to LOCK (0), and then turn to ON (II).

2. Operate the climate control system in several modes.

3. Check for DTCs using the HDS How to Troubleshoot the Climate Control System or self-diagnostic function How to Troubleshoot the Climate Control System.

Is DTC B1236 or L and AUTO indicated?

YES -

Go to step 4.

NO -

Intermittent failure, check for loose wires or poor connections on the passenger's air mix control motor circuit.�

4. Turn the ignition switch to LOCK (0).

5. Test the passenger's air mix control motor Passenger's Air Mix Control Motor Test.

Is the passenger's air mix control motor OK?

YES -

Go to step 6.

NO -

Replace the passenger's air mix control motor Passenger's Air Mix Control Motor Replacement.�

6. Disconnect the passenger's air mix control motor 7P connector.

7. Disconnect the front climate control unit 30P connector.

8. Check for continuity between following terminals of the front climate control unit 30P connector and the passenger's air mix control motor 7P connector.









Is there continuity?

YES -

Check for loose wire or poor connections at the front climate control unit 30P connector and at the passenger's air mix control motor 7P connector. If the connections are good, substitute a known-good front climate control unit, and recheck. If the symptom/indication goes away, replace the original front climate control unit Front Climate Control Unit Removal/Installation.�

NO -

Repair an open in the wire(s) between the front climate control unit and the passenger's air mix control motor.�