Inspection Procedure 2: Cruise Control cannot be Set (No Response SET - Switch is Pressed).

COMMENTS ON TROUBLE SYMPTOM

The conditions for initiating the adaptive cruise control system (ACC) may not be satisfied.

PROBABLE CAUSES

Malfunction of CAN bus system.
Damaged harness or connector.
Malfunction of the clock spring.
Malfunction of the cruise control switch.
Malfunction of the stop lamp switch.
Malfunction of the inhibitor switch <CVT or A/T>.
Malfunction of the parking brake switch.
Malfunction of the engine system.
Malfunction of the ASC system.
Malfunction of the CVT system.
Malfunction of the A/T system.
Malfunction of the ACC/FCM-ECU.

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 2.

STEP 2. Check the diagnosis code is stored again.

Q. Is diagnosis code stored?

	Repair the adaptive cruise control system (ACC) (Refer to ).

	Go to Step 3.

STEP 3. Check the other system diagnosis code.

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

<4B1>, GROUP 13B - Troubleshooting, Diagnosis Function

<6B3>).

Q. Is any diagnosis code stored?

	Repair the MPI system (Refer to GROUP 13A - Troubleshooting, Inspection Chart for Diagnosis Code <4B1>, GROUP 13B - Troubleshooting, Inspection Chart for Diagnosis Code <6B3>).

	Go to Step 4.

STEP 4. Check the other system diagnosis code.

Using M.U.T.-III, perform ASC system diagnosis code (Refer to GROUP 35C - Troubleshooting, Diagnosis Function

Q. Is the diagnosis code stored?

	Repair the ASC system (Refer to GROUP 35C - Troubleshooting, Inspection Chart for Diagnosis Code ).

	Go to Step 5.

STEP 5. Check the other system diagnosis code.

Using M.U.T.-III, perform transmission system diagnosis code (Refer to GROUP 23A - Troubleshooting, Diagnosis Function

<CVT>, GROUP 23C - Troubleshooting, Diagnosis Function

<A/T>).

Q. Is any diagnosis code stored?

	Repair the CVT system (Refer to GROUP 23A - Troubleshooting, Inspection Chart for Diagnosis Code <CVT>, GROUP 23C -Troubleshooting, Inspection Chart for Diagnosis Code <A/T>).

	Go to Step 6.

STEP 6. Check the other symptom.

The system should be turned on when the cruise control switch is operated.

Q. Is the system turned on by operating the cruise control switch?

	Go to Step 7.

	Refer to "When the cruise control switch is operated, the system is not turned on."(Refer to )

STEP 7. Check the data list.

Using M.U.T.-III, check the data list of MPI system (Refer to data list reference table

Item 75: CANCEL switch
Item 92: SET - switch

Q. Is the check result normal?

	Go to Step 9.

	Go to Step 8.

STEP 8. Check the cruise control switch.

Refer to

Q. Is the check result normal?

	Replace the engine-ECU (Refer to GROUP 13A - Engine-ECU <4B1>, GROUP 13B - Engine-ECU <6B3>).

	Replace the cruise control switch (Refer to ).

STEP 9. Check the symptom.

(1)Drive the vehicle for approx. three minutes.

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 ACC/FCM-ECU (Refer to ).