CODE NO. L0A30 P/W (RR) SW pulse 1 disconnection


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




COMMENTS ON TROUBLE SYMPTOM
If the pulse 1 signal from the rear power window motor (RH) cannot be received, rear power window sub switch (RH) sets the diagnosis code No. L0A30.

PROBABLE CAUSES

  • Malfunction of the rear power window motor (RH)
  • Malfunction of the rear power window sub switch (RH)
  • Damaged wiring harness and connectors

DIAGNOSTIC PROCEDURE

STEP 1. Connector check: E-20 rear power window sub switch (RH) connector, E-19 rear power window motor (RH) connector

Q. Is the check result normal?
Go to Step 2.
Repair the defective connector.

STEP 2. Check of the wiring harness between the E-20 rear power window sub switch (RH) connector terminal No. 8, 3 and the E-19 rear power window motor (RH) connector terminal No. 2, 6

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

Q. Is the check result normal?
Go to Step 3.
Repair the wiring harness.

STEP 3. Diagnosis code recheck
Replace the rear power window motor (RH). Recheck if the diagnosis code is set.
(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?
Replace the rear power window sub switch (RH).
The diagnosis is complete.