Code No. B252F Rear corner sensor (RH) error
Code No. B2531 Rear corner sensor (LH) error
Code No. B2533 Back sensor (RH) error
Code No. B2535 Back sensor (LH) error


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

DIAGNOSTIC FUNCTION



  • If any of the sensors has a malfunction, if there is a short circuit between the sensor and corner sensor/back sensor-ECU, or if there is an error with the corner sensor/back sensor-ECU internal monitor, the corner sensor/back sensor-ECU sets one of the diagnosis codes No. B252F, No. B2531, No. B2533, and No. 2535.

TROUBLESHOOTING HINT



  • Damaged harness wires and connectors
  • Sensor malfunction
  • Internal monitor error of corner sensor/back sensor-ECU

DIAGNOSIS PROCEDURE


STEP 1. Check the following connectors.




  • G-09 Rear corner sensor (RH) connector
  • G-18 Rear corner sensor (LH) connector
  • G-12 Back sensor (RH) connector
  • G-16 Back sensor (LH) connector
  • C-13 corner sensor/back sensor-ECU connector

Q. Are all the connectors in good condition?





STEP 2. Check the following wiring harness.




  • Wiring harness from G-09 Rear corner sensor (RH) connector terminal No. 1, 2 to C-13 corner sensor/back sensor-ECU connector terminal No. 6, 23.
  • Wiring harness from G-18 Rear corner sensor (LH) connector terminal No. 1, 2 to C-13 corner sensor/back sensor-ECU connector terminal No. 5, 22.
  • Wiring harness from G-12 Back sensor (RH) connector terminal No. 1, 2 to C-13 corner sensor/back sensor-ECU connector terminal No. 8, 12.
  • Wiring harness from G-16 Back sensor (LH) connector terminal No. 1, 2 to C-13 corner sensor/back sensor-ECU connector terminal No. 7, 21.
note Prior to the wiring harness inspection, check intermediate connectors C-27, G-17, G-20, and repair if necessary.

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





STEP 3. 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?









STEP 4. Diagnosis code recheck



Q. Is the diagnosis code set?





STEP 5. Diagnosis code recheck



Q. Is the diagnosis code set?





STEP 6. Diagnosis code recheck



Q. Is the diagnosis code set?





STEP 7. Diagnosis code recheck



Q. Is the diagnosis code set?