Inspection Procedure 4: One or more of the reversing sensor (corner sensor/back sensor) does not detect the obstacle.
Inspection Procedure 5: The reversing sensor indicator keeps flashing.


caution
  • Whenever the ECU is replaced, ensure that the input signal circuit is normal.
  • When the illuminated licence plate is installed, the sensors may not operate because of noise from the plate. (When the ultrasonic noise is received, the bass toned buzzer sound continuously. When the ultrasonic noise stops, the normal operation will be resumed immediately.)

COMMENTS ON TROUBLE SYMPTOM



note
  • If the corner sensor/back sensor-ECU detects an abnormality (open circuit, malfunction, etc.) with one or more of the sensors, it turns off the relevant sensor and sounds the high toned buzzer for 5 seconds. The reversing sensor indicator illuminates while the system is being operated until the relevant sensor returns to normal.
  • If ultrasonic noise is received with one or more of the sensor, the corner sensor/back sensor-ECU sounds the low toned buzzer continuously. When the ultrasonic noise is stopped, the sensor returns to normal. (The reversing sensor indicator does not flash.)

PROBABLE 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. Check the reversing sensor (corner sensor/back sensor) for interference.


Q. Are there anything that interferes with the communication (things that generate radio waves such as magnets and an air-cleaning device that has a power plug) near the reversing sensor (corner sensor/back sensor)?





STEP 2. M.U.T.-III diagnosis code



Q. Is the diagnosis code set?





STEP 3. Trouble symptom recheck


Q. Is the check result normal?