Inspection Procedure 1: The reversing sensor system does not operate.
COMMENTS ON TROUBLE SYMPTOM
PROBABLE CAUSES
- Malfunction of corner sensor/back sensor-ECU
- Malfunction of the ETACS-ECU
- Damaged harness wires and connectors
DIAGNOSIS PROCEDURE
STEP 1. Voltage measurement at corner sensor/back sensor-ECU connector (IG terminal).
(1)Disconnect the connector, and measure at the wiring harness side. |
(2)Turn the ignition switch to the "ON" position. |
(3)Check the voltage between the corner sensor/back sensor-ECU connector (IG terminal)
and body earth. OK: System voltage |
Q.
Is the check result normal?
STEP 2. Check of short to power supply, short to earth, and open circuit in IG line between ETACS-ECU connector and corner sensor/back sensor-ECU connector.
Q.
Is the check result normal?
STEP 3. Resistance measurement at corner sensor/back sensor-ECU connector (PGND terminal).
(1)Disconnect the connector, and measure at the wiring harness side. |
(2)Measure the resistance between the corner sensor/back sensor-ECU connector (PGND terminal)
and body earth. OK: Continuity exists (2 Ω or less) |