Code No.U1109 Column SW LIN timeout


caution Before replacing the ECU, ensure that the communication circuit is normal.

JUDGEMENT CRITERIA



PROBABLE CAUSES



  • Faulty lighting switch <Except vehicles for South Africa>
  • Faulty wiper/washer switch <Vehicles for South Africa>
  • Malfunction of the LIN bus

DIAGNOSIS PROCEDURE


STEP 1. Connector check: C-411 and C-417 ETACS-ECU connectors, C-314 column switch connector


Q. Is the check result normal?





STEP 2. Resistance measurement at the C-314 column switch connector


(1)Disconnect the connector, and measure at the wiring harness side.
(2)Measure the resistance between the C-314 column switch connector terminal No. 4 and the body earth.
OK: Continuity exists (2 Ω or less)

Q. Is the check result normal?





STEP 3. Wiring harness check from C-314 column switch connector terminal No. 4 to body earth



note Prior to the wiring harness inspection, check earth joint connector C-01, and repair if necessary.

Q. Is the check result normal?





STEP 4. Voltage measurement at the C-314 column switch connector.


(1)Disconnect the connector, and measure at the wiring harness side.
(2)Measure the voltage between the C-314 column switch connector terminal No. 1 and the body earth.
OK: System voltage

Q. Is the check result normal?





STEP 5. Wiring harness check between the C-314 column switch connector terminal No. 1 and the C-417 ETACS-ECU connector terminal No. 10



note Prior to the wiring harness inspection, check joint connector C-102, and repair if necessary.

Q. Is the check result normal?





STEP 6. Check the wiring harness wires between C-411 ETACS-ECU connector terminal No. 1 and C-314 column switch connector terminal No. 3.



note Prior to the wiring harness inspection, check joint connector C-102, and repair if necessary.

Q. Is the check result normal?





STEP 7. Check whether the diagnosis code is reset.



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

Q. Is the diagnosis code set?