Is there continuity?
YES -
Go to step 10.
NO -
Repair an open in the wire(s) between the climate control unit and the rear air mix control motor.?
10. Check for continuity between body ground and climate control unit connector B (14P) terminals No. 1 and No. 2 individually.
Is there continuity?
YES -
Repair a short to body ground in the wire(s) between the climate control unit and the rear air mix control motor.?
NO -
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.?
J and Auto
DTC Troubleshooting: B1233 (J and AUTO)
DTC B1233 or DTC indicator J and AUTO:
An Open 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.
