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DTC Description
 
 
DTC DETECTION LOGIC
DTC Description
M.U.T.-III SE screen terms
(Trouble diagnosis content)
DTC detection condition
C18DB09EDLC
(Brake power backup unit)
Diagnosis conditionElectric motor switch ON
Signal (terminal)–
ThresholdWhen a malfunction is detected in brake power backup unit.
Diagnosis delay time2 seconds or more
 
 
POSSIBLE CAUSE
  • Brake power backup unit
 
 
FAIL-SAFE
Normal condition
 
 
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
If “DTC CONFIRMATION PROCEDURE” has been previously conducted, always electric motor switch OFF (Auto ACC function OFF) before conducting the next test.
:
 
2.CHECK DTC DETECTION
M.U.T.-III SE
  1. Change the power supply mode of the electric motor switch to ON from OFF without depressing the brake pedal.
    cautionDo not set the vehicle to the READY status.
  2. Repeat Step 1 twice or more.
    cautionWait for 5 seconds or more after the power supply mode of the electric motor switch is changed to OFF.
  3. Change the power supply mode of the electric motor switch to OFF, then disconnect the M.U.T.-III SE from the data link connector.
  4. Close all the doors including the back door, then confirm that the room light turns off and wait for 3 minutes or more outside the vehicle in that state.
    cautionWhile waiting, do not touch the vehicle.
  5. Change the power supply mode of the electric motor switch to ON (READY indicator: OFF).
    cautionDo not set the vehicle to the READY status.
  6. Erase the DTC set in "EBA".
  7. Change the power supply mode of the electric motor switch to OFF, then disconnect the M.U.T.-III SE from the data link connector.
  8. Close all the doors including the back door, then confirm that the room light turns off and wait for 3 minutes or more outside the vehicle in that state.
    cautionWhile waiting, do not touch the vehicle.
  9. Change the power supply mode of the electric motor switch to ON (READY indicator: OFF).
    cautionDo not set the vehicle to the READY status.
  10. Depress the brake pedal 100 mm (3.9in) or more, the keep that state for 5 seconds or more.
  11. Release the brake pedal.
  12. Start the M.U.T.-III SE, then perform the Diagnostic Trouble Code of "EBA".
Is DTC “C18DB-09” detected?
Refer to Diagnosis Procedure.
INSPECTION END