Inspection Procedure 6: When "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



  • The CAN bus line between the engine-ECU and the ETACS-ECU and between the ETACS-ECU and the combination meter may be defective.
  • The combination meter, ETACS-ECU or engine-ECU may also be defective.

PROBABLE CAUSES



  • Malfunction of CAN bus system.
  • Damaged harness or connector.
  • Malfunction of the combination meter.
  • Malfunction of the ETACS-ECU.
  • Malfunction of the engine-ECU.

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 8.

STEP 2. Operation check the actuator test.
Using M.U.T.-III, operation check the actuator test.

  • Item 19: Cruise control indicator
(Refer to actuator test reference table ) <4HN>.

Q. Is the check result normal?
Go to Step 7.
Go to Step 3.

STEP 3. Check the diesel fuel system diagnosis code.
Using M.U.T.-III, perform diesel fuel system diagnosis code (Refer to GROUP 13E - Troubleshooting).

Q. Is diagnosis code No. U0141 set?
Repair the diesel fuel system (Refer to GROUP 13E - Troubleshooting). Then go to Step 8.
Go to Step 4.

STEP 4. 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 set?
Repair the ETACS system (Refer to GROUP 54A - Troubleshooting, Diagnostic Trouble Code Procedures, Code No. U0155: Combination Meter-ECU CAN Communication Time Out ). Then go to Step 8.
Go to Step 5.

STEP 5. Check the combination meter system service data.
Using M.U.T.-III, check the combination meter system service data (Refer to GROUP 54A - Combination Meter, Troubleshooting, Service Data ).

  • Item F7: Cruise control indicator

Q. Is the check result normal?
Go to Step 6.
Repair the combination meter system (Refer to GROUP 54A - Combination Meter, Troubleshooting, Inspection Procedure 4 ). Then go to Step 8.

STEP 6. Check the data list.
Using M.U.T.-III, check the data list.

  • Item 581: Cruise control indicator
(Refer to data list reference table ) <4HN>.

Q. Is the check result normal?
Go to Step 7.
Replace the engine-ECU (Refer to GROUP 13E - Engine-ECU ). Then go to Step 8.

STEP 7. Retest the system.

Q. Does the cruise control indicator lamp illuminate when the "ON/OFF" switch is turned ON?
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 13E - Engine-ECU ). Then go to Step 8.

STEP 8. Retest the system.

Q. Does the cruise control indicator lamp illuminate when the "ON/OFF" switch is turned ON?
The procedure is complete.
Return to Step 1.