Inspection Procedure 10: When The Speed Limiter ON/OFF Switch is Turned ON, The Speed limiter Display Screen does not Display (However, the Cruise Control System is Normal).




OPERATION




COMMENTS ON TROUBLE SYMPTOM




PROBABLE CAUSES




DIAGNOSIS PROCEDURE


caution
  • If there is any problem in the CAN bus lines, an incorrect diagnosis code may be stored. Prior to this diagnosis, diagnose the CAN bus lines.
  • Before replacing the ECU, ensure that the CAN bus lines is normal.

STEP 1. Check the CAN bus system diagnosis.


Using M.U.T.-III, perform CAN bus diagnosis (Refer to GROUP 54C - Explanation About The M.U.T.-III Can Bus Diagnostics ).

Q. Is the check result satisfactory?

Go to Step 2.
Repair the CAN bus lines (Refer to GROUP 54C - Troubleshooting, Can Bus Diagnostic Table ). Then go to Step 6.

STEP 2. Check the MPI system diagnosis code.


Using M.U.T.-III, perform MPI system diagnosis code (Refer to GROUP 13C - Troubleshooting, Diagnosis Function ).

Q. Is diagnosis code No.U0141 stored?

Repair the MPI system (Refer to GROUP 13C - Troubleshooting, Diagnosis Code Procedures, Code No.U0141: ETACS-ECU Time-out ). Then go to Step 6.
Go to Step 3.

STEP 3. Check the ETACS system diagnosis code.


Using M.U.T.-III, perform ETACS system diagnosis code (Refer to GROUP 54A - ETACS, Troubleshooting, Diagnosis Function ).

Q. Is diagnosis code No.U0155 stored?

Repair the ETACS system (Refer to GROUP 54A - Troubleshooting, Diagnosis Code Procedures, Code No.U0155: Combination Meter-ECU CAN Communication Timeout ). Then go to Step 6.
Go to Step 4.

STEP 4. Check the combination meter system special function.


Using M.U.T.-III, check the combination meter system special function (Refer to GROUP 54A - Combination Meter, Special Function Table ).

  • Item 2: LCD (AUTO)

Q. Is the check result normal?

Go to Step 5.
Repair the combination meter system (Refer to GROUP 54A - Combination Meter, Trouble Symptom Chart ). Then go to Step 6.

STEP 5. Check the symptom.


Q. When the speed limiter ON/OFF switch is turned ON, is the speed limiter display screen displayed?

It can be assumed that this malfunction is intermittent (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points, How to Cope with Intermittent Malfunction ).
Replace the engine-ECU (Refer to GROUP 13C - Engine-ECU ). Then go to Step 6.

STEP 6. Check the symptom.


Q. When the speed limiter ON/OFF switch is turned ON, is the speed limiter display screen displayed?

The procedure is complete.
Return to Step 1.