Code No. B2516 Rear height sensor signal


caution
  • Before replacing the ECU, ensure that the power supply circuit, the earth circuit and the communication circuit are normal.
  • When the ETACS-ECU of vehicles without KOS is replaced, the encrypted code of the ignition key needs to be registered to the ETACS-ECU. (If the encrypted code is not registered, the engine cannot be started. Register the encrypted code as described in Immobilizer System - How to Register Key ID .)

DIAGNOSTIC FUNCTION



JUDGEMENT CRITERIA



PROBABLE CAUSES



  • Malfunction of the rear height sensor
  • Malfunction of the rear height sensor installation
  • Malfunction of the ETACS-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. Rear height sensor installation status check



Q. Is the check result normal?





STEP 3. Voltage measurement at rear height sensor connector (SBR terminal).


(1)Disconnect the connector, and measure at the wiring harness-side connector.
(2)Turn the ignition switch to the ON position.
(3)Measure the resistance between the rear height sensor connector (SBR terminal) and body earth.
OK: 5 V

Q. Is the check result normal?





STEP 4. Check of open circuit in SBR line between rear height sensor connector and ETACS-ECU connector.


Q. Is the check result normal?





STEP 5. Resistance measurement at rear height sensor connector (SGR terminal).


(1)Disconnect the connector, and measure at the wiring harness side.
(2)Measure the resistance between the rear height sensor connector (SGR terminal) and body earth.
OK: Continuity exists (2 Ω or less)

Q. Is the check result normal?





STEP 6. Check of open circuit in SGR line between rear height sensor connector and ETACS-ECU connector.


Q. Is the check result normal?





STEP 7. Check of short to power supply, short to earth, and open circuit in SHR line between rear height sensor connector and ETACS-ECU connector.


Q. Is the check result normal?





STEP 8. rear height sensor check



Q. Is the check result normal?





STEP 9 M.U.T.-III data list



Item No.
 Item name
 Normal condition
Item 412
 Rear HS signal voltage
 0.7 V - 4.1 V
OK: Normal condition is displayed.

Q. Is the check result normal?