Inspection Procedure 3: The System cannot be Activated or Deactivated Even When the Sonar switch is pressed.










COMMENTS ON TROUBLE SYMPTOM


If the reversing sensor system ON/OFF cannot be switched even when the sonar switch is pressed, the harness, connector(s), sonar switch, or corner sensor/back sensor-ECU may have a problem.

PROBABLE CAUSES



DIAGNOSIS PROCEDURE

STEP 1. Connector check: C-103 sonar switch connector

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

STEP 2. sonar switch check
Refer to .

Q. Is the check result normal?
Go to Step 3.
Replace the sonar switch.

STEP 3. Resistance measurement at the C-103 sonar switch connector
(1)Disconnect the connector, and measure at the wiring harness side.
(2)Measure the resistance between sonar switch connector C-103 (terminal No. 2) and the body earth.
OK: Continuity exists (2 Ω or less)

Q. Is the check result normal?
Go to Step 5.
Go to Step 4.

STEP 4. Wiring harness check between the C-103 sonar switch connector (terminal No. 2) and the body earth

Q. Is the check result normal?
Retest the system.
Repair the wiring harness.

STEP 5. Connector check: C-125 corner sensor/back sensor-ECU connector

Q. Is the check result normal?
Go to Step 6.
Repair the defective connector.

STEP 6. Wiring harness check between the C-103 sonar switch connector (terminal No. 1) and the C-125 corner sensor/back sensor-ECU connector (terminal No. 13)

Q. Is the check result normal?
Replace the corner sensor/back sensor-ECU.
Repair the wiring harness.