Inspection Procedure 7: Cruise Control cannot be Set ("COAST/SET" or "ACC/RES" Switch Operation is not Available) <4B11-Turbo>.


COMMENTS ON TROUBLE SYMPTOM



note Press the cruise control switches one by one securely. Otherwise, the cruise control system may not be started.

PROBABLE CAUSES



  • Malfunction of CAN bus system.
  • Malfunction of the MPI system.
  • Malfunction of the shift lever system.
  • Malfunction of the TC-SST system.
  • Malfunction of the cruise control switch.
  • Malfunction of the stop lamp switch.
  • Malfunction of the shift lever ECU.
  • Malfunction of the TC-SST-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 10.

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 any diagnosis code set?
Repair the MPI system (Refer to GROUP 13C - Troubleshooting, Inspection Chart for Diagnosis Trouble Code ). Then go to Step 10 .
Go to Step 3.

STEP 3. Check the shift lever system diagnosis code.
Using M.U.T.-III, perform shift lever system diagnosis code (Refer to GROUP 22E - Diagnosis <shift lever>, Diagnostic Function ).

Q. Is any diagnosis code set?
Repair the shift lever system (Refer to GROUP 22E - Diagnosis <shift lever>, Diagnosis Code Chart ). Then go to Step 10.
Go to Step 4.

STEP 4. Check the TC-SST system diagnosis code.
Using M.U.T.-III, perform TC-SST system diagnosis code (Refer to GROUP 22E - Diagnosis <TC-SST>, Diagnostic Function ).

Q. Is any diagnosis code set?
Repair the TC-SST system (Refer to GROUP 22E - Diagnosis <TC-SST>, Diagnosis Code Chart ). Then go to Step 10.
Go to Step 5.

STEP 5. Check the diagnosis code.
(1)Disconnect the negative battery terminal, and erase the diagnosis code of the cruise control system.
(2)Connect the negative battery terminal.
(3)With the cruise control switches not operated, depress the brake pedal for several seconds
(4)Turn the ignition switch to the "ON" position, and press the "ON/OFF" switch to turn the cruise control system to ON (turn ON the cruise control indicator lamp).
(5)After turning the cruise control system to ON, when 2 minutes or more has elapsed without operating the cruise control switches, read the diagnosis code of the cruise control system (Refer to ).

Q. Is any diagnosis code set?
Repair the cruise control system (Refer to - Diagnosis Code Chart). Then go to Step 10.
Go to Step 6.

STEP 6. Check the data list.
Using M.U.T.-III, check the data list (Refer to - data list reference table).

  • Item 75: "CANCEL" switch
  • Item 86: "ON/OFF" switch
  • Item 91: "ACC/RES" switch
  • Item 92: "COAST/SET" switch

Q. Is the check result normal?
Go to Step 7.
Refer to - Diagnosis Code Procedures, Code No.15: Cruise control switch system <4B11-Turbo>. Then go to Step 10 .

STEP 7. Check the data list.
Using M.U.T.-III, check the data list (Refer to - data list reference table).

  • Item 74: Stop lamp switch
  • Item 89: Brake switch

Q. Is the check result normal?
Go to Step 8.
Refer to - Diagnosis Code Procedures, Code No.22: Stop lamp switch system. Then go to Step 10.

STEP 8. Check the data list.
Using M.U.T.-III, check the data list (Refer to - data list reference table).

  • Item 88: Neutral switch

Q. Is the check result normal?
Go to Step 9.
Refer to - Symptom Procedures, Inspection Procedure 4. Then go to Step 10.

STEP 9. Check the symptoms.

Q. Can cruise control be set?
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 ). When the Engine-ECU is replaced, register the encrypted code (Refer to GROUP 42C - Troubleshooting, ID Code Registration Necessity Judgment Table ). Then go to Step 10.

STEP 10. Check the symptoms.

Q. Can cruise control be set?
The procedure is complete.
Return to Step 1.