Code No. U0100 Engine time-out error
Code No. U0141 ETACS time-out error


caution
  • If the diagnosis codes U0100 and U0141 are set in ABS-ECU, always diagnose the CAN bus line. If there is any fault in the CAN bus lines, an incorrect diagnosis code may be set. In this case, the set diagnosis code is not highly reliable.
  • Before replacing the ECU, ensure that the communication circuit is normal.

OPERATION
ABS-ECU communicates with the engine ECU and ETACS-ECU via the CAN bus lines.

DIAGNOSIS CODE SET CONDITIONS
This diagnosis code is set if ABS-ECU cannot receive the signal sent from other ECU for a certain period.

PROBABLE CAUSES
Code No. U0100
  • Wiring harness or connector failure of CAN bus line
  • Engine ECU malfunction
  • ABS-ECU malfunction
Code No. U0141
  • Wiring harness or connector failure of CAN bus line
  • Malfunction of ETACS-ECU
  • ABS-ECU malfunction

DIAGNOSTIC PROCEDURE

STEP 1. M.U.T.-III CAN bus diagnostics
Use M.U.T.-III to diagnose the CAN bus lines.

Q. Is the check result normal?
Go to Step 2.
Repair the CAN bus lines (Refer to GROUP 54C - CAN Bus Diagnosis table ). On completion, go to Step 4.

STEP 2. Check whether the diagnosis code is reset.

Q. Is Code No. U0100 or U0141 set?
Go to Step 3.
The procedure is complete.

STEP 3. M.U.T.-III other system diagnosis code
Use M.U.T.-III to check that other diagnosis code is set in the ECU corresponding to the relevant diagnosis.

Q. Is other diagnosis code set?
Troubleshoot for the relevant diagnosis code.
Go to Step 4.

STEP 4. M.U.T.-III diagnosis code
Use M.U.T.-III to check if the same diagnosis code (time-out) is set in the other ECU (CAN-C).

Q. Is any diagnosis code set?
YES (Code No. U0100 is set) : Replace the engine ECU, and then go to Step 5.
YES (Code No. U0141 is set) : Replace the ETACS-ECU, and then go to Step 5.
NO (No diagnosis code is set.) : Go to Step 5.

STEP 5. Check whether the diagnosis code is reset.

Q. Is Code No. U0100 or U0141 set?
Replace the hydraulic unit (ABS-ECU) (Refer to ).
The procedure is complete.