Inspection Procedure 6: The Reversing Sensor Indicator keeps Flashing.

COMMENTS ON TROUBLE SYMPTOM

If either reversing sensor (corner sensor/back sensor) does not detect the obstacle, the wiring harness, connectors, corner sensor/back sensor-ECU may be defective.

POSSIBLE CAUSES

Damaged harness wires and connectors
Malfunction of reversing sensor (corner sensor/back sensor)
Malfunction of corner sensor/back sensor-ECU

DIAGNOSIS PROCEDURE

STEP 1. Connector check: C-125 corner sensor/back sensor-ECU.

Q. Is the check result normal?

	Go to Step 2.

	Repair the defective connector.

STEP 2. Voltage measurement at C-125 corner sensor/back sensor-ECU connector

(1)Disconnect C-125 corner sensor/back sensor-ECU connector, and measure at the wiring harness side.

(2)Turn the ignition switch to "ON" position.

(3)Measure the voltage between terminal No. 11 and earth.
OK: System voltage

Q. Is the check result normal?

	Go to Step 4.

	Go to Step 3.

STEP 3. Check the wiring harness between C-125 corner sensor/back sensor-ECU connector (terminal No. 11) and C-317 ETACS-ECU connector (terminal No. 5).

Q. Is the check result normal?

	Troubleshoot the ETACS-ECU. Refer to Inspection Procedure 2 "The ignition switch (IG1) signal is not received" .

	Repair the wiring harness.

STEP 4. Confirm which reversing sensor (corner sensor/back sensor) does not detect the obstacle.

Q. Which reversing sensor (corner sensor/back sensor) does not detect the obstacle?

	Corner sensor (rear: RH) : Go to Step 5.

	Corner sensor (rear: LH) : Go to Step 8.

	Back sensor (RH) : Go to Step 11.

	Back sensor (LH) : Go to Step 14.

STEP 5. Connector check: C-125 corner sensor/back sensor-ECU connector and F-12 corner sensor (rear: RH) connector.

Q. Is the check result normal?

	Go to Step 6.

	Repair the defective connector.

STEP 6. Check the wiring harness between F-12 corner sensor (rear: RH) connector (terminal No. 1, 2) and C-125 corner sensor/back sensor-ECU connector (terminal No. 8, 10).

note

Before the wiring harness inspection, inspect the intermediate connectors C-35, F-22 and F-19, and repair if necessary.

Q. Is the check result normal?

	Go to Step 7.

	Repair the wiring harness.

STEP 7. Verification after corner sensor replacement

After replacing the corner sensor (rear: RH), verify that the reversing sensor system is normally.

Q. Is the check result normal?

	The procedure is complete.

	Replace the corner sensor/back sensor-ECU.

STEP 8. Connector check: C-125 corner sensor/back sensor-ECU connector and F-20 corner sensor (rear: LH) connector.

Q. Is the check result normal?

	Go to Step 9.

	Repair the defective connector.

STEP 9. Check the wiring harness between F-20 corner sensor (rear: LH) connector (terminal No. 1, 2) and C-125 corner sensor/back sensor-ECU connector (terminal No. 7, 10).

note

Before the wiring harness inspection, inspect the intermediate connectors C-35, F-22 and F-19, and repair if necessary.

Q. Is the check result normal?

	Go to Step 10.

	Repair the wiring harness.

STEP 10. Verification after corner sensor replacement

After replacing the corner sensor (rear: LH), verify that the reversing sensor system is normally.

Q. Is the check result normal?

	The procedure is complete.

	Replace the corner sensor/back sensor-ECU.

STEP 11. Connector check: C-125 corner sensor/back sensor-ECU connector and F-15 back sensor (RH) connector.

Q. Is the check result normal?

	Go to Step 12.

	Repair the defective connector.

STEP 12. Check the wiring harness between F-15 back sensor (RH) connector (terminal No. 1, 2) and C-125 corner sensor/back sensor-ECU connector (terminal No. 6, 10).

note

Before the wiring harness inspection, inspect the intermediate connectors C-35, F-22 and F-19, and repair if necessary.

Q. Is the check result normal?

	Go to Step 13.

	Repair the wiring harness.

STEP 13. Verification after back sensor replacement

After replacing the back sensor (RH), verify that the reversing sensor system is normally.

Q. Is the check result normal?

	The procedure is complete.

	Replace the corner sensor/back sensor-ECU.

STEP 14. Connector check: C-125 corner sensor/back sensor-ECU connector and F-18 back sensor (LH) connector.

Q. Is the check result normal?

	Go to Step 15.

	Repair the defective connector.

STEP 15. Check the wiring harness between F-18 back sensor (LH) connector (terminal 1, 2) and C-125 corner sensor/back sensor-ECU connector (terminal No. 9, 10).

note

Before the wiring harness inspection, inspect the intermediate connectors C-35, F-22 and F-19, and repair if necessary.

Q. Is the check result normal?

	Go to Step 16.

	Repair the wiring harness.

STEP 16. Verification after back sensor replacement

After replacing the back sensor (LH), verify that the reversing sensor system is normally.

Q. Is the check result normal?

	The procedure is complete.

	Replace the corner sensor/back sensor-ECU.