Code No. B2515 Front height sensor signal error <Vehicles for Russia>


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

DIAGNOSTIC FUNCTION



JUDGEMENT CRITERIA



PROBABLE CAUSES



  • Malfunction of the front height sensor
  • Malfunction of the front height sensor installation
  • Malfunction of the headlamp automatic levelling-ECU
  • Damaged harness wires and connectors

DIAGNOSIS PROCEDURE


STEP 1. M.U.T.-III diagnosis code



Q. Is diagnosis code No. B2514 set?





STEP 2. Front height sensor installation status check



Q. Is the check result normal?





STEP 3. Connector check: A-05 front height sensor connector, C-117 headlamp automatic levelling-ECU connector


Q. Is the check result normal?





STEP 4. Voltage measurement at the A-05 front height sensor connector.


(1)Disconnect the connector, and measure at the wiring harness-side connector.
(2)Turn the ignition switch to the ON position.
(3)Voltage between the A-05 front height sensor connector terminal No. 1 and the body earth
OK: 5 V

Q. Is the check result normal?





STEP 5. Wiring harness check between the A-05 front height sensor connector terminal No. 1 and the C-117 headlamp automatic levelling-ECU connector terminal No. 21.


note Before the wiring harness check, check the intermediate connector A-65, and repair that if necessary.

  • Check the power supply line for open circuit.

Q. Is the check result normal?





STEP 6. Resistance measurement at the A-05 front height sensor connector.


(1)Disconnect the connector, and measure at the wiring harness side.
(2)Measure the resistance between the A-05 front height sensor connector terminal No. 3 and the body earth.
OK: Continuity exists (2 Ω or less)

Q. Is the check result normal?





STEP 7. Wiring harness check between the A-05 front height sensor connector terminal No. 3 and the C-117 headlamp automatic levelling-ECU connector terminal No. 18.


note Before the wiring harness check, check the intermediate connector A-65, and repair that if necessary.

  • Check the earth line for open circuit.

Q. Is the check result normal?





STEP 8. Wiring harness check between the A-05 front height sensor connector terminal No. 2 and the C-117 headlamp automatic levelling-ECU connector terminal No. 19.


note Before the wiring harness check, check the intermediate connector A-65, and repair that if necessary.

  • Check the signal line for open or short circuit.

Q. Is the check result normal?





STEP 9. Front height sensor check



Q. Is the check result normal?





STEP 10. M.U.T.-III data list



Item No.
 Item name
 Normal condition
Item 4
 Front HS signal voltage
 0.7 V - 4.1 V
OK: Normal condition is displayed.

Q. Is the check result normal?