DTC Troubleshooting: B1241 (N)
  1. Connect the power transistor 4P connector terminals No. 1 and No. 3 with a jumper wire.
  1. Turn the ignition switch ON (II).
Does the blower motor run at high speed?
YES -
Go to Step 15 .
NO -
Repair open in the wire between the power transistor and the blower motor.■
  1. Turn the ignition switch OFF.
  1. Disconnect the jumper wire.
  1. Disconnect the heater control unit 32P connector.