( TL19E00K733000Y1237FAAT00 )

DTC Troubleshooting: B1237 (E and A/C ON)

1. Turn the ignition switch to ON (II), and check the same terminal for voltage to body ground.

Is there any voltage?

YES | - | Repair short to power in the wire. This short may have also damaged the heater control unit. Repair short to power before replacing the heater control unit.■
NO | - | Go to Step 17 .

1. Turn the ignition switch to LOCK (0).

1. Reconnect heater control unit connector B (12P).