DTC indicator L or DTC B1239: An Open or Short in the Mode Control Motor Circuit Clear the DTC. Turn the ignition switch OFF, and then ON. Operate the climate control system is several modes. Check the DTCs. Is DTC L or B1239 indicated?
YES | - | Go to Step 5 .
NO | - | Intermittent failure, check for loose wires or poor connections on the mode control motor circuit.■
Test the mode control motor. Is the mode control motor OK?
YES | - | Go to Step 6 .
NO | - | Replace the mode control motor.■
Disconnect the mode control motor 7P connector. Disconnect climate control unit connector A (22P). Check for continuity between body ground and climate control unit connector A (22P) terminals No. 6, 7, 15, 16, 17, 18, and 19 individually. Is there continuity?
YES | - | Repair any short to body ground in the wire(s) between the climate control unit and the mode control motor.■
NO | - | Go to Step 9 .