Inspection Procedure 9: When the cruise control ON/OFF Switch is Turned ON, the Cruise Control Indicator Lamp does not Illuminate (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 set. 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 5.

STEP 2. Check the diesel fuel system diagnosis code.
Using M.U.T.-III, perform diesel fuel system diagnosis code (Refer to GROUP 13B - Troubleshooting, Diagnosis Function <4D5>, GROUP 13C - Troubleshooting, Diagnosis Function <4N1>).

Q. Is diagnosis code No.U1108 set?
Repair the diesel fuel system (Refer to GROUP 13B - Troubleshooting, Diagnosis Code Procedures, Code No.U1108: combination meter Time-out <4D5>, GROUP 13C - Troubleshooting, Diagnosis Code Procedures, Code No.U1108: combination meter Time-out <4N1>). Then go to Step 5.
Go to Step 3.

STEP 3. Check the combination meter system actuator test.
Using M.U.T.-III, check the combination meter system actuator test (Refer to GROUP 54A - Combination Meter, Troubleshooting, Actuator Test Table ).

  • Item 7: Indicator1

Q. Is the check result normal?
Go to Step 4.
Repair the combination meter system (Refer to GROUP 54A - Combination Meter, Trouble Symptom Chart ). Then go to Step 5.

STEP 4. Check the symptom.

Q. When the cruise control ON/OFF switch is turned ON, is the cruise control indicator lamp illuminated?
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 13B - Engine-ECU <4D5>, GROUP 13C - Engine-ECU <4N1>). Then go to Step 5.

STEP 5. Check the symptom.

Q. When the cruise control ON/OFF switch is turned ON, is the cruise control indicator lamp illuminated?
The procedure is complete.
Return to Step 1.