( TF09E8HK711000Y1240FAAT00 )
DTC Troubleshooting: B1240 (E and A/C)
DTC B1240 or DTC indicator E and A/C:
A Problem in the Mode Control Motor Circuit, Linkage, Doors, 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 B1240 or E and A/C indicated?
YES -
Go to Step 5 .
NO -
Intermittent failure.■
  1. Turn the ignition switch to LOCK (0).
Is the mode control motor OK?
YES -
Go to Step 7 .
NO -
Replace the mode control motor, or repair the mode control linkage or doors.■
  1. Disconnect the mode 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 mode control motor 7P connector.
    36P:
    7P:
    No. 10
    No. 1
    No. 11
    No. 2

Is there continuity?
YES -
Go to Step 10 .
NO -
Repair open in the wires between the climate control unit and the mode control motor.■
  1. Check for continuity between body ground and the climate control unit 36P connector No. 10 and No. 11 terminals individually.
Is there continuity?
YES -
Repair short to body ground in the wires between the climate control unit and the mode control motor.■
NO -
Substitute a known-good climate control unit, and recheck. If the symptom/indication goes away, replace the original climate control unit .■