Code No. B253A RR Corner sensor open and short
Code No. B253B RL Corner sensor open and short
Code No. B253C RR Back sensor open and short
Code No. B253D RL Back sensor open and short



caution
  • Before replacing the ECU or sensor, ensure that the power supply circuit, the earth circuit and the communication circuit are 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.)

DIAGNOSTIC FUNCTION




TROUBLESHOOTING HINT




DIAGNOSIS PROCEDURE


STEP 1. Check the following wiring harness.



Q. Are all the wiring harness wires in good condition?

Go to Step 2.

Repair the connector(s) or wiring harness.

STEP 2. 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?

Rear corner sensor (RH) : Go to Step 3.

Rear corner sensor (LH) : Go to Step 4.

Back sensor (RH) : Go to Step 5.

Back sensor (LH) : Go to Step 6.

STEP 3. Diagnosis code recheck


Temporarily replace the rear corner sensor (RH), and then check if the diagnosis code No. B253A is set.

Q. Is the diagnosis code set?

Replace the corner sensor/back sensor-ECU.

Replace the rear corner sensor (RH).

STEP 4. Diagnosis code recheck


Temporarily replace the rear corner sensor (LH), and then check if the diagnosis code No. B253B is set.

Q. Is the diagnosis code set?

Replace the corner sensor/back sensor-ECU.

Replace the rear corner sensor (LH).

STEP 5. Diagnosis code recheck


Temporarily replace the back sensor (RH), and then check if the diagnosis code No. B253C is set.

Q. Is the diagnosis code set?

Replace the corner sensor/back sensor-ECU.

Replace the back sensor (RH).

STEP 6. Diagnosis code recheck


Temporarily replace the back sensor (LH), and then check if the diagnosis code No. B253D is set.

Q. Is the diagnosis code set?

Replace the corner sensor/back sensor-ECU.

Replace the back sensor (LH).