CODE NO. L0730 P/W (DR) SW pulse 1 disconnection


caution Before replacing the ECU, ensure that the input and output signal circuits are normal.






COMMENTS ON TROUBLE SYMPTOM



PROBABLE CAUSES



  • Malfunction of the front power window motor (driver’s side)
  • Malfunction of the power window main switch
  • Damaged wiring harness and connectors

DIAGNOSTIC PROCEDURE


STEP 1. Connector check: E-18 power window main switch connector, E-15 front power window motor (driver’s side) connector


Q. Is the check result normal?





STEP 2. Check of the wiring harness between the E-18 power window main switch connector terminal Nos. 8, 10, 12 and the E-15 front power window motor (driver’s side) connector terminal Nos. 5, 3, 6



  • Check the input/output lines for open circuit and short circuit.

Q. Is the check result normal?





STEP 3. Diagnosis code recheck



(1)Erase the diagnosis code.
(2)Turn the ignition switch from the LOCK (OFF) position to the ON position.
(3)Check if the diagnosis code is set.

Q. Is the diagnosis code set?