[Previous][Next]
DTC Description
 
 
DTC DETECTION LOGIC
DTC Description
M.U.T.-III SE screen terms
(Trouble diagnosis content)
DTC detection condition
U1FA186ADAS CAN Failure1Diagnosis condition
  • Electric motor switch ON
  • Power supply voltage is normal
Signal (terminal)CAN communication signal
ThresholdWhen a CAN communication signal is not continuously transmitted to the ADAS control unit 2.
Diagnosis delay time2 seconds or more
2Diagnosis condition
  • Electric motor switch ON
  • Power supply voltage is normal
Signal (terminal)CAN communication signal
ThresholdWhen a CAN communication signal is not continuously received from the ADAS control unit 2.
Diagnosis delay time2 seconds or more
 
 
POSSIBLE CAUSE
noteConfirm that the DTC is stored DTC or active DTC. If the DTC is active DTC, proceed to trouble diagnosis procedure. If the DTC is stored DTC, erase the DTC. Do not replace the ABS actuator and electric unit (control unit) if the DTC is stored DTC.
Stored DTCActive DTC
  • CAN busline
  • Electric driven intelligent brake unit
  • ADAS-ECU
  • Harness or connector
  • CAN busline
  • Electric driven intelligent brake unit
  • ADAS-ECU
 
 
FAIL-SAFE
Normal condition
 
 
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
If “DTC CONFIRMATION PROCEDURE” has been previously conducted, always turn the electric motor switch OFF (Auto ACC function OFF) before conducting the next test.
:
 
2.CHECK DTC DETECTION
M.U.T.-III SE
  1. Connect the all connectors.
  2. Use the M.U.T.-III SE, then erase the DTC set in the "EBA".
  3. Change the power supply mode of the electric motor switch to ON from OFF without depressing the brake pedal.
  4. Use the M.U.T.-III SE, then check whether the DTC set in the "EBA".
Is DTC “U1FA1-86” detected?
-1"Active DTC" is displayed. Refer to Diagnosis Procedure.
-2“Stored DTC” is displayed: INSPECTION END (Erase the memory of self-diagnosis results.)
-1To check malfunction symptom before repair: Refer to Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTIONS.HOW TO COPE WITH INTERMITTENT MALFUNCTIONS.
-2Confirmation after repair: INSPECTION END