Code No. U1190: No receive fault detect signal


caution
  • If the diagnosis code No. U1190 is set, diagnose the CAN bus lines.
  • When replacing the ECU, always check that the communication circuit is normal.

DIAGNOSTIC FUNCTION



JUDGEMENT CRITERIA


Check Conditions
  • When all the following conditions are met.

  1. Power supply mode: ON
  2. ETACS-ECU system voltage is at 10 to 16 V.
Judgment Criterion
  • After the following condition is met, 5,000 ms or more have elapsed.

  1. CAN signal from the ETACS-ECU cannot be received.

PROBABLE CAUSES



  • Malfunction of the CAN bus line
  • Malfunction of ETACS-ECU
  • Malfunction of KOS-ECU

DIAGNOSIS PROCEDURE


STEP 1. M.U.T.-III CAN bus diagnostics



Q. Is the check result normal?





STEP 2. M.U.T.-III other system diagnosis code



Q. Is the diagnosis code set?





STEP 3. M.U.T.-III other system diagnosis code



Q. Is the diagnosis code set?





STEP 4. Diagnosis code recheck



(1)Erase the diagnosis code.
(2)Turn the engine switch from the LOCK (OFF) position to the ON position.
(3)Check if the diagnosis code is set.

Q. Is the diagnosis code set?