Is there any voltage?
YES -
Repair a short to power in the wire(s) between the climate control unit and the recirculation control motor. This short may also damage the
climate control unit. Repair a short to power before replacing the climate control unit.?
NO -
Check for loose wires or poor connections at climate control unit connector A (40P) and at the recirculation 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.?
K and Auto
DTC Troubleshooting: B1234 (K and AUTO)
DTC B1234 or DTC indicator K and AUTO:
A Short in the Driver's Air Mix Control Motor Circuit
1. Clear the DTCs with the HDS.
2. Turn the ignition switch to LOCK (0) and then back to ON (II).
3. Do the self-diagnostic function with the HDS or the climate control unit.
4. Check for DTCs.
Is DTC B1234 or K and AUTO indicated?
YES -
Go to step 5.
NO -
Intermittent failure, check for looses wires or poor connections in the driver's air mix control motor circuit.?
5. Check for DTCs.
Are these DTCs also present; B1237 or N and AUTO, and/or B1245 or G, and/or B2968 or A and WINDSHIELD DEFROST, and/or B2980 or B
and WINDSHIELD DEFROST?
YES -
Go to step 13.
NO -
Go to step 6.
6. Turn the ignition switch to LOCK (0).
7. Test the driver's air mix control motor See: Heating and Air Conditioning/Testing and Inspection/Component Tests and General
Diagnostics/Driver's Air Mix Control Motor Test.
Is the driver's air mix control motor OK?
