Inspection Procedure 5: No door will be locked or unlocked by operating a lock/unlock switch on any door.


caution Before replacing the ECU, ensure that the power supply circuit, the earth circuit and the communication circuit are normal.

PROBABLE CAUSES



DIAGNOSIS PROCEDURE


STEP 1. M.U.T.-III CAN bus diagnostics


Use M.U.T.-III to diagnose the CAN bus lines.

Q. Is the check result normal?

Go to Step 2.

Repair the CAN bus line (Refer to GROUP 54C - Troubleshooting ).

STEP 2. M.U.T.-III diagnosis code


Check if any diagnosis code is set in the KOS&OSS-ECU.

Q. Is the diagnosis code set?

Refer to diagnosis code chart .

Go to Step 3.

STEP 3. M.U.T.-III other system diagnosis code


Check if any diagnosis code is set in the ETACS-ECU.

Q. Is the diagnosis code set?

Perform troubleshooting for the ETACS (Refer to GROUP 54A - ETACS - Troubleshooting ).

Go to Step 4.

STEP 4. Check the central door locking system operation


Close all of the doors. Then the inside lock knob at the driver's door should function to lock and unlock all of the doors.

Q. Is the check result normal?

Go to Step 5.

Perform troubleshooting for the central door locking system (Refer to GROUP 42A - Troubleshooting ).

STEP 5. Check the customisation


Check that KOS feature is set to Both enable or Door Entry enable with a customisation function.

Q. Is it set to Both enable or Door Entry enable?

Go to Step 6.

Set KOS feature to Both enable or Door Entry enable with a customisation function (Refer to ).

STEP 6. M.U.T.-III other system data list


Check the ETACS-ECU service data relevant to the operation of keyless entry function.

1.Open the driver’s door or front passenger’s door.
Item No.
 Item name
 Normal condition
19
 Driver’s door switch
 ON
48
 Passenger’s door switch
 ON
2.Open the rear door (RH) after the all doors and tailgate close.
Item No.
 Item name
 Normal condition
49
 Rear door switch or tailgate latch switch
 ON
3.Open the rear door (LH) after the all doors and tailgate close.
Item No.
 Item name
 Normal condition
49
 Rear door switch or tailgate latch switch
 ON
4.Open the tailgate after the all doors and tailgate close.
Item No.
 Item name
 Normal condition
49
 Rear door switch or tailgate latch switch
 ON
OK: Normal conditions are displayed for all the items.

Q. Are the check result normal?

Go to Step 7.

Check the input signal for the ETACS-ECU (Refer to GROUP 54A - ETACS, Inspection Procedure 7 "One of the door switch signals is not received ").

STEP 7. Keyless operation system communication test


Using M.U.T.-III, perform the antenna communication test to check that the outside transmission antenna assembly communicates normally (Refer to ).

OK: Normal values are displayed for all the items

Q. Is the check result normal?

Go to Step 9.

Go to Step 8.

STEP 8. Check with another registered keyless operation key.


Using another registered keyless operation key, check whether the doors can be locked and unlocked for twice or more consecutively.

Q. Can they be operated?

They can be operated. : Go to Step 11.

They cannot be operated. : Go to Step 9.

There is no other registered keyless operation key. : Go to Step 11.

STEP 9. Connection check of commercial electric products


Check whether commercial electric products are connected.

Q. Are commercial electric products connected?

Disconnect the commercial electric products as they may be interfering with communication. Then go to Step 10.

Go to Step 10.

STEP 10. Check of the troubles


Operate the lock/unlock switch to check that the door can be locked and unlocked.

Q. Is the check result normal?

The diagnosis is complete.

Replace KOS&OSS-ECU and register the ID codes (Refer to ).

STEP 11. Keyless operation key battery charged level check


Check whether the LED illuminates when the lock/unlock switch on the keyless operation key that does not work is pressed.

Q. Is the check result normal?

Go to Step 12.

Replace the battery in the keyless operation key (Refer to ).

STEP 12. Keyless operation key check


Check whether the registered keyless operation key is used.

Q. Is the registered keyless operation key used?

Used. : Register the key ID and keyless operation key ID of the keyless operation key. Then go to Step 13.

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 13. Check of the trouble


Operate the lock/unlock switch to check that the door can be locked and unlocked.

Q. Is the check result normal?

The diagnosis is complete.

Replace the keyless operation key, and register the ID codes (Refer to ).