Code No.U0231 Rain light sensor LIN timeout <Vehicles with lighting control sensor>
caution | Before replacing the ECU, ensure that the communication
circuit is normal. |
JUDGMENT CRITERIA
PROBABLE CAUSES
- Faulty lighting control sensor
- Malfunction of the LIN bus
DIAGNOSIS PROCEDURE
STEP 1. Connector check: C-416 and C-417 ETACS-ECU connectors, E-08 lighting control sensor connector
Q.
Is the check result normal?
STEP 2. Resistance measurement at the E-08 lighting control sensor connector
(1)Disconnect the connector, and measure at the wiring harness side. |
(2)Measure the resistance between the E-08 lighting control sensor connector terminal
No. 2 and the body earth. OK: Continuity exists (2 Ω or less) |
Q.
Is the check result normal?
STEP 3. Wiring harness check from E-08 lighting control sensor connector terminal No. 2 to body earth
Q.
Is the check result normal?
STEP 4. Voltage measurement at the E-08 lighting control sensor connector.
(1)Disconnect the connector, and measure at the wiring harness side. |
(2)Measure the voltage between the E-08 lighting control sensor connector terminal
No. 1 and the body earth. OK: System voltage |
Q.
Is the check result normal?
STEP 5. Wiring harness check between the E-08 lighting control sensor connector terminal No. 1 and the C-417 ETACS-ECU connector terminal No. 10
note | Prior to the wiring harness inspection, check intermediate connector C-226, and joint
connector C-102, and repair if necessary. |
Q.
Is the check result normal?
STEP 6. Check the wiring harness wires between C-416 ETACS-ECU connector terminal No. 1 and E-08 lighting control sensor connector terminal No. 3.
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 the LOCK (OFF) position to the ON position. |
(3)Check if diagnosis code is set. |