3. Do the self-diagnostic function with the HDS or the climate control unit.
4. Check for DTCs.
Is DTC B1236 or M and AUTO indicated?
YES -
Go to step 5.
NO -
Intermittent failure, check for loose wires or poor connections in the passenger's air mix control motor circuit.?
5. Turn the ignition switch to LOCK (0).
6. Test the passenger's air mix control motor See: Heating and Air Conditioning/Testing and Inspection/Component Tests and General
Diagnostics/Passenger's Air Mix Control Motor Test.
Is the passenger's air mix control motor OK?
YES -
Go to step 7.
NO -
Replace the passenger's air mix control motor See: Heating and Air Conditioning/Air Door/Air Door Actuator / Motor/Service and
Repair/Passenger's Air Mix Control Motor Replacement.?
7. Disconnect the passenger's air mix control motor 7P connector.
8. Disconnect climate control unit connector A (40P).
9. Check for continuity between the following terminals of climate control unit connector A (40P) and the passenger's air mix control motor 7P
connector.
Is there continuity?
YES -
Check for loose wires or poor connections at climate control unit connector A (40P) and at the passenger's air mix control motor 7P 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 See: Heating and Air Conditioning/Control Assembly/Service and Repair/Climate Control Unit Removal/Installation.?
NO -
Repair an open in the wire(s) between the climate control unit and the passenger's air mix control motor.?
