DTC Troubleshooting: B1241 (N)
  1. Check for continuity between the following terminals of the heater control unit 32P connector and the power transistor 4P connector.
    32P:
    4P:
    No. 10
    No. 4
    No. 11
    No. 2

Is there continuity?
YES -
Go to Step 20 .
NO -
Repair open in the wire(s) between the heater control unit and the power transistor.■
  1. Turn the ignition switch ON (II).