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Inspection Procedure 5: No door will be locked or unlocked by operating a lock/unlock switch on any door
 
 
cautionBefore replacing the ECU, ensure that the power supply circuit, the ground circuit and the communication circuit are normal.
 
 
 
 
TROUBLESHOOTING HINTS
  • Malfunction of the CAN bus lines
  • Malfunction of the central door locking system
  • Malfunction of the keyless operation key
  • Damaged wiring harness and connectors
  • Keyless operation key not registered
  • Malfunction of the KOS&OSS-ECU
  • Malfunction of the ETACS-ECU
  • Malfunction of the outside transmission antenna assembly
  • Function setting error or no setting with a customization
  • An ambient electric device or noise source interferes with this system when the lock/unlock switch is operated.
 
 
DIAGNOSIS
STEP 1. Using scan tool (M.U.T.-III), diagnose the CAN bus line.
(1)
cautionTo prevent damage to scan tool (M.U.T.-III), always turn the power supply mode of the engine switch to the "OFF" position before connecting or disconnecting scan tool (M.U.T.-III).
Connect scan tool (M.U.T.-III) [Refer to "How to connect scan tool (M.U.T.-III) "].
(2) Turn the power supply mode of the engine switch to "ON".
(3) Diagnose the CAN bus line.
(4) Turn the power supply mode of the engine switch to "OFF".
Is the CAN bus line found to be normal?
Go to Step 2.
Repair the CAN bus line (Refer to GROUP 54C, Diagnosis ).
 
STEP 2. Using scan tool (M.U.T.-III), read the diagnostic trouble code.
Check if any DTC is set in the KOS&OSS-ECU.
(1)
cautionTo prevent damage to scan tool (M.U.T.-III), always turn the power supply mode of the engine switch to the "OFF" position before connecting or disconnecting scan tool (M.U.T.-III).
Connect scan tool (M.U.T.-III) [Refer to "How to connect scan tool (M.U.T.-III) "].
(2) Turn the power supply mode of the engine switch to "ON".
(3) Check if DTC is set.
(4) Turn the power supply mode of the engine switch to "OFF".
Is the DTC set?
Refer to diagnostic trouble code chart .
Go to Step 3.
 
STEP 3. Using scan tool (M.U.T.-III), read the other system diagnostic trouble code.
Check if any diagnostic trouble code is set in the ETACS-ECU.
(1)
cautionTo prevent damage to scan tool (M.U.T.-III), always turn the power supply mode of the engine switch to the "OFF" position before connecting or disconnecting scan tool (M.U.T.-III).
Connect scan tool (M.U.T.-III) [Refer to "How to connect scan tool (M.U.T.-III) "].
(2) Turn the power supply mode of the engine switch to "ON".
(3) Check if DTC is set.
(4) Turn the power supply mode of the engine switch to "OFF".
Is the DTC 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.
Check that the central door locking system works normally.
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 customization function.
Check that either of the followings other than "ENG start enable" or "Both disabled" are set for "F.A.S.T. feature" with the customization function.
  • Both enable
  • Door Entry enable
Is the check result normal?
Go to Step 6.
Set either of the followings other than ENG start enable or Both disabled for F.A.S.T. feature with the customization function (Refer to ).
 
STEP 6. Keyless operation system communication test.
Check that the communication with the outside transmission antenna assembly is normal (Refer to Antenna Test ).
  • DR side antenna (outdoor)
  • PS side antenna (outdoor)
OK: Normal values are displayed for all the items
Is the check result normal?
Go to Step 8.
Go to Step 7.
 
STEP 7. 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.
Can they be operated?
They can be operated. : Go to Step 10.
They cannot be operated. : Go to Step 8.
There is no other registered keyless operation key. : Go to Step 10.
 
STEP 8. Connection check of commercial electric products.
Check whether commercial electric products are connected.
Are commercial electric products connected?
Disconnect the commercial electric products as they may be interfering with communication. Then go to Step 9.
Go to Step 9.
 
STEP 9. Check of the troubles.
Operate the lock/unlock switch to check that the door can be locked and unlocked.
Is the check result normal?
The diagnosis is complete.
Replace KOS&OSS-ECU and register the ID codes (Refer to ).
 
STEP 10. 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.
Is the check result normal?
Go to Step 11.
Replace the battery in the keyless operation key.
 
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 and keyless operation 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 trouble.
Operate the lock/unlock switch to check that the door can be locked and unlocked.
Is the check result normal?
The diagnosis is complete.
Replace the keyless operation key, and register the ID codes (Refer to ).