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 ON (II).
  1. Do the self-diagnostic with the HDS or the climate control unit.
  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).
  1. Disconnect climate control unit connectors A (28P) and B (12P).
  1. Check for continuity between climate control unit connector A (28P) No. 23 terminal and body ground.
Is there continuity?
YES -
Repair short to body ground in the wire between the climate control unit and the evaporator temperature sensor.■
NO -
Go to Step 8 .