[ Model - ECLIPSE CROSS / Year - 2018 ]
2018 / ECLIPSE CROSS / EC - Workshop Manual
42 -BODY > 42B-KEYLESS OPERATION SYSTEM (KOS) > TROUBLESHOOTING > SYMPTOM PROCEDURES > Vehicle power does not turn ON. (not possible with both of power supply mode ACC and ON)
Inspection Procedure 13: Vehicle power does not turn "ON" (Not possible with both of power supply mode "ACC" and "ON").
 
 
cautionBefore replacing the ECU, ensure that the power supply circuit, the earth circuit and the communication circuit are normal.
 
 
 
 
COMMENTS ON TROUBLE SYMPTOM
When the vehicle power does not turn "ON" (not possible with both of power supply mode "ACC" and "ON"), the battery, engine switch, CAN bus line, KOS&OSS-ECU, KOS&OSS-ECU power supply, or earth circuit may have a problem.
noteKOS&OSS-ECU can communicate with the M.U.T.-IIISE even when the engine switch is in the "OFF" position.
 
 
PROBABLE CAUSES
  • Malfunction of battery
  • Damaged wiring harness and connectors
  • Malfunction of engine switch (poor connector contact, poor engine switch contact)
  • Malfunction of the CAN bus line
  • Malfunction of KOS&OSS-ECU
  • Malfunction of the keyless operation key battery
 
 
DIAGNOSIS PROCEDURE
notePrior to diagnosis, read "Troubleshooting procedure when vehicle power does not turn ON" .
STEP 1. Battery check
Perform the battery test to check the battery status (Refer to GROUP 54A - Battery - Battery test ).
Is the check result normal?
Go to Step 2.
Replace the battery (Refer to GROUP 54A - Battery ).
 
STEP 2. M.U.T.-IIISE CAN bus diagnostics
Use the M.U.T.-IIISE to diagnose the CAN bus lines.
Is the check result normal?
Go to Step 3.
Repair the CAN bus line (Refer to GROUP 54C - Troubleshooting ).
 
STEP 3. Check that the M.U.T.-IIISE communicates with this system
Check that the communication with M.U.T.-IIISE is possible.
(1) Turn on and off any of the door switches several times, or open any of the doors.
(2) Check that KOS&OSS-ECU can communicate with the M.U.T.-IIISE.
Is the check result normal?
Go to Step 4.
Carry out the troubleshooting of KOS&OSS-ECU power supply or earth circuit malfunction (Refer to ).
 
STEP 4. M.U.T.-IIISE diagnosis code
Check if the diagnosis code is set in the KOS&OSS-ECU.
Is the diagnosis code set?
Refer to diagnosis code chart .
Go to Step 5.
 
STEP 5. Engine switch check
Continuity check of engine switch (Refer to ).
Is the check result normal?
Go to Step 6.
Replace the engine switch (Refer to ).
 
STEP 6. Keyless operation key battery charged level check
Check whether the LED illuminates when the lock/unlock switch on the keyless operation key is pressed.
Is the check result normal?
Go to Step 7.
Replace the battery in the keyless operation key.
 
STEP 7. Customised contents check
Use the customisation function to check the setting contents of "KOS feature" (Refer to ).
noteIf the customized contents do not satisfy your intention, customise the system again.
Which content is selected?
Set to "Both enable" or "ENG start enable" : Go to Step 8.
"Door entry enable" or "Both disable" : Go to Step 10.
 
STEP 8. Check of the troubles
Check the condition of the keyless operation key when the vehicle power does not turn "ON".
What kinds of circumstances cause the vehicle power supply to remain off?
When the keyless operation key is inside the vehicle. : Go to Step 9.
When the engine switch is touched with the keyless operation key (flat battery). : Go to Step 10.
 
STEP 9. Keyless operation system communication test
Using M.U.T.-IIISE, perform the antenna communication test to check that the keyless operation antenna (Inner side) communicates normally (Refer to ).
  • Front antenna(indoor)
  • Rear antenna(indoor)
OK: Normal values are displayed for all the items
Is the check result normal?
Go to Step 13.
Go to Step 10.
 
STEP 10. Check with another registered keyless operation key.
Check whether the power supply mode can be switched by another registered keyless operation key.
Can the power supply mode be switched?
The power supply mode can be switched or there is no other registered keyless operation key. : Go to Step 11.
It cannot be switched. : Go to Step 13.
 
STEP 11. Keyless operation key check
Check whether the registered keyless operation key is used.
Is the registered keyless operation key used?
Used. : Register the key ID of the keyless operation key. Then go to Step 12.
Not used (The keyless operation key is not registered or the keyless operation key is also used for another vehicle). : Refer to the key ID registration procedure manual to register the key ID. If the key ID cannot be registered, replace the keyless operation key and register the key ID.
 
STEP 12. Check of the troubles
Check that the vehicle power can be turned "ON".
Is the check result normal?
This diagnosis is complete.
Go to Step 13.
 
STEP 13. Check of the troubles
Remove commercial electric appliances if they are attached on. Check that the vehicle power can be turned "ON".
Is the check result normal?
Aggravation of radio wave condition caused by commercial electric products or intermittent malfunction is suspected (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction ).
Go to Step 14.
 
STEP 14. Check of the troubles
Check that the vehicle power can be turned "ON" or the indicator of engine switch in amber, green.
Is the check result normal?
Go to Step 15.
Replace the KOS&OSS-ECU and register the chassis number (Refer to ).
 
STEP 15. M.U.T.-IIISE diagnosis code
Check if the diagnosis code is set in the KOS&OSS-ECU.
Is the diagnosis code set?
Refer to diagnosis code chart .
This diagnosis is complete.