( TF09E8HK711000Y1232FAAT00 )
DTC Troubleshooting: B1232 (H and AUTO)
DTC B1232 or DTC indicator H and AUTO:
 A Short in the Evaporator Temperature Sensor Circuit
  1. Clear the DTC with the HDS.
  1. Turn the ignition switch to LOCK (0), and then to ON (II).
  1. Check for DTCs.
Is DTC B1232 or H and AUTO indicated?
YES -
Go to Step 5 .
NO -
Intermittent failure.■
  1. Turn the ignition switch to LOCK (0).
Is the evaporator temperature sensor OK?
YES -
Go to Step 7 .
NO -
Replace the evaporator temperature sensor .■
  1. Disconnect the climate control unit 36P connector.
  1. Jump the SCS line with the HDS.
    NOTE: This step must be done to protect the engine control module (ECM)/powertrain control module (PCM) from damage.
  1. Disconnect ECM/PCM connector A (49P).
  1. Check for continuity between ECM/PCM connector A (49P) No. 38 terminal and body ground.
Is there continuity?
YES -
Repair short to body ground in the wire between the ECM/PCM and the climate control unit.■
NO -
Substitute a known-good climate control unit, and recheck. If the symptom/indication goes away, replace the original climate control unit .■