DTC Troubleshooting: B1232 (H and AUTO)
  1. Check for continuity between climate control unit connector A (28P) No. 23 terminal and climate control unit connector B (12P) No. 10 terminal.
Is there continuity?
YES -
Repair short in the wires between the climate control unit and the evaporator temperature sensor.■
NO -
Go to Step 9 .
  1. Remove the evaporator temperature sensor, and test it.
Is the evaporator temperature sensor OK?
YES -
Substitute a known-good climate control unit, and recheck. If the symptom/indication goes away, replace the original climate control unit .■
NO -
Replace the evaporator temperature sensor. ■