( TF09E8HK711000Y1235FAAT00 )
DTC Troubleshooting: B1235 (C and A/C)
DTC B1235 or DTC indicator C and A/C:
 A Problem in the Air Mix Control Motor Circuit, Linkage, Door, or Motor
  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 B1235 or C and A/C indicated?
YES -
Go to Step 5 .
NO -
Intermittent failure.■
  1. Turn the ignition switch to LOCK (0).
Is the air mix control motor OK?
YES -
Go to Step 7 .
NO -
Replace the air mix control motor, or repair the air mix control linkage or door.■
  1. Disconnect the air mix control motor 7P connector.
  1. Disconnect the climate control unit 36P connector.
  1. Check for continuity between the following terminals of the climate control unit 36P connector and the air mix control motor 7P connector.
    36P:
    7P:
    No. 12
    No. 2
    No. 13
    No. 1

Is there continuity?
YES -
Go to Step 10 .
NO -
Repair open in the wires between the climate control unit and the air mix control motor.■
  1. Check for continuity between body ground and the climate control unit 36P connector No. 12 and No. 13 terminals individually.
Is there continuity?
YES -
Repair short to body ground in the wires between the climate control unit and the 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 .■