Code No. U0114: 4WD-ECU Time-out



caution If diagnosis code U0114 is outputted from engine-ECU, surely perform CAN busline diagnosis.
caution Replace ECU after certainly confirming that the communication circuits are normal.

TROUBLE JUDGMENT


Check Conditions
Judgment Criterion

COMMENTS ON TROUBLE SYMPTOM


Current malfunction
Past malfunction

PROBABLE CAUSES




DIAGNOSIS PROCEDURE


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



  • Use M.U.T.-III to perform CAN busline diagnosis.

Q. Is the check result normal?

Go to Step 2 .
Repair CAN busline (Refer to GROUP 54C - Troubleshooting - CAN Bus Diagnosis Table ). After repairing CAN busline, go to Step 6 .

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



  • Confirm the diagnosis code is outputted from the 4WD-ECU.

Q. Is diagnosis code set?

Perform troubleshooting of 4WD (Refer to GROUP 27C - Troubleshooting - Inspection Chart for Diagnosis Code ).
Go to Step 3 .

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


Diagnosis code No. U0114 from the following ECU that performs CAN communication with 4WD-ECU: Confirm 4WD-ECU Time-out is output.

  • ABS-ECU or ASC-ECU

Q. Is diagnosis code set?

Go to Step 4 .
Go to Step 5 .

STEP 4. M.U.T.-III diagnosis code



  • Reconfirmation of diagnosis code.
Confirm again the diagnosis code is outputted from the engine-ECU.

  1. Erase the output diagnosis code.
  2. Ignition switch: LOCK (OFF) → ON
  3. Confirm whether the diagnosis code is output.

Q. Is diagnosis code set?

After replacing the 4WD-ECU, go to Step 6 .
Intermittent malfunction in CAN busline between engine-ECU and 4WD-ECU (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions ).

STEP 5. M.U.T.-III diagnosis code



  • Reconfirmation of diagnosis code.
Confirm again the diagnosis code is outputted from the engine-ECU.

  1. Erase the output diagnosis code.
  2. Ignition switch: LOCK (OFF) → ON
  3. Confirm whether the diagnosis code is output.

Q. Is diagnosis code set?

Replace the engine-ECU.
Intermittent malfunction in CAN busline between engine-ECU and 4WD-ECU (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions ).

STEP 6. M.U.T.-III diagnosis code



  • Reconfirmation of diagnosis code.
Confirm again the diagnosis code is outputted from the engine-ECU.

  1. Erase the output diagnosis code.
  2. Ignition switch: LOCK (OFF) → ON
  3. Confirm whether the diagnosis code is output.

Q. Is diagnosis code set?

Go to Step 1 .
Check end.