Is there continuity between any of the terminals?
YES -
Repair a short in the wires.?
NO -
Go to step 12.
12. Turn the ignition switch to ON (II), and measure the voltage between the same terminal and body ground.
Is there any voltage?
YES -
Repair a short to power in the wire(s) between the climate control unit and the front mode control motor. This short may also damage the climate
control unit. Repair a short to power before replacing the climate control unit.?
NO -
Check for loose wires or poor connections at climate control unit connector A (40P) and at the front mode control motor 7P connector. If the
connections are good, substitute a known-good climate control unit, and recheck. If the symptom/indication goes away, replace the original climate
control unit See: Heating and Air Conditioning/Control Assembly/Service and Repair/Climate Control Unit Removal/Installation.?
B1240
DTC Troubleshooting: B1240 (B and MODE)
DTC B1240 or DTC indicator B and MODE:
A Problem in the Front Mode Control Linkage, Doors, or Motor Circuit
1. Clear the DTCs with the HDS.
2. Turn the ignition switch to LOCK (0) and then back to ON (II).
3. Do the self-diagnostic function with the HDS or the climate control unit.
4. Check for DTCs.
Is DTC B1240 or B and MODE indicated?
