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.?
B1250
DTC Troubleshooting: B1050, B1200, B1250, B1150, B1750, B1900, B1950, B2150, B1800, B1350
DTC B1050:
Communication Circuit Error (BUS-OFF)
DTC B1150:
Communication Circuit Error (BUS-OFF)
