Inspection Procedure
5: Cruise Control cannot be Set (No Response SET - Switch and RES + Switch is
Pressed).
COMMENTS ON TROUBLE SYMPTOM
The fail-safe function is probably cancelling cruise control system. In this case, checking
the cruise control system, MPI system, CAN bus system and CVT system diagnosis codes. The M.U.T.-III
can also be used to check if the circuits of each input switches are normal or not by checking
the data list.
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 CVT system.
Malfunction of the cruise control switches.
Malfunction of the stop lamp switch.
Malfunction of the clutch switch <M/T>.
Malfunction of the inhibitor switch <CVT>.
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 13A - Troubleshooting,
Diagnosis Function <4B1>, GROUP 13C - Troubleshooting,
Diagnosis Function <4J1>).
Q.
Is any diagnosis code set?
Repair the MPI system (Refer to GROUP 13A - Troubleshooting, Inspection
Chart for Diagnosis Code <4B1>, GROUP 13C - Troubleshooting, Inspection
Chart for Diagnosis Code <4J1>). Then go to Step 10.
Go to Step 3 <CVT>
Go to Step 4 <M/T>
STEP 3. Check the CVT system diagnosis code.
Using M.U.T.-III, perform CVT system diagnosis code (Refer to GROUP 23A - Troubleshooting,
Diagnosis Function ).
Q.
Is any diagnosis code set?
Repair the CVT system (Refer to GROUP 23A - Troubleshooting, Inspection
Chart for Diagnosis Code ). Then go to Step 10.
Go to Step 4.
STEP 4. Read the diagnosis code.
(1)Use the M.U.T.-III, erase the diagnosis code of the cruise control system.
(2)Turn the ignition switch to the "ON" position, and press the cruise control ON/OFF
switch to turn the cruise control system to ON (turn ON the cruise control indicator lamp).
(3)After turning the cruise control system to ON, when 2 minutes or more has elapsed
without operating the cruise control switches.
(4)With the cruise control switches not operated, depress the brake pedal for several
seconds, and then 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 5.
STEP 5. 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: Cruise control ON/OFF switch
Item 91: RES + switch
Item 92: SET - switch
Q.
Is the check result normal?
Go to Step 6.
Check the cruise control switch system (Refer to - Diagnosis
Code Procedures, Code No. P0578: Abnormal voltage at cruise control switch). Then go to Step
10.
STEP 6. 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 7 <CVT>
Go to Step 8 <M/T>
Check the stop lamp switch system (Refer to - Diagnosis
Code Procedures, Code No. P0504: Malfunction of the stop lamp switch system). Then go to Step
10.
STEP 7. Check the data list. <CVT>
Using M.U.T.-III, check the data list (Refer to data list reference table ).
Item 88: Inhibitor switch
Q.
Is the check result normal?
Go to Step 9.
Check the CVT system (Refer to GROUP 23A - Troubleshooting, Inspection
Procedures for Diagnosis Code, Code No.P0705: Malfunction of Inhibitor Switch )
. Then go to Step 10.
STEP 8. Check the data list. <M/T>
Using M.U.T.-III, check the data list (Refer to data list reference table ).
Item 78: clutch switch
Q.
Is any diagnosis code set?
Go to Step 9.
Check the clutch switch system (Refer to - Symptom
Procedures, Inspection Procedure 2). Then go to Step 10.
STEP 9. Check the symptom.
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 13A - Engine-ECU <4B1>,
GROUP 13C - Engine-ECU <4J1>). Then go to Step
10.