Caution / Notice / Hint

NOTE:

The smart access system with push-button start (for Entry Function) uses the LIN communication system and CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Troubleshoot the smart access system with push-button start (for Entry Function) after confirming that the communication systems are functioning properly.
Refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2015 - ]
When using the Techstream with the engine switch off, connect the Techstream to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and the vehicle begins. Then select the vehicle type under manual mode and enter the following menus: Body Electrical / Smart Access. While using the Techstream, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the Techstream and the vehicle.
Check that there are no electrical key transmitter sub-assemblies in the vehicle.
Before replacing the certification ECU (smart key ECU assembly), refer to Precaution.
Refer to PRECAUTION [09/2015 - 08/2016] , or refer to PRECAUTION [08/2016 - 08/2019] , or refer to PRECAUTION [08/2019 - 07/2020] , or refer to PRECAUTION [07/2020 - ]
After repair, confirm that no DTCs are output.

HINT:

If the driver door entry lock and unlock functions do not operate, the cause of the malfunction may be stored in the certification ECU (smart key ECU assembly).
If the cause of the malfunction is stored in the certification ECU (smart key ECU assembly), the following table is helpful in checking whether the malfunction was caused by wave interference.

Body Electrical > Smart Access > Utility

Tester Display
Operation History

RADIO WAVE INTERFERENCE

Parameter Name	Content
Lock / Key RF Signal Interference	When an entry lock operation was performed, the electrical key transmitter sub-assembly could not be confirmed due to wave interference. If the cause of the malfunction has not been stored but the vehicle has been moved and an entry lock operation has been successfully performed, the possibility of wave interference is high.
Unlock / Key RF Signal Interference	When an entry unlock operation was performed, the electrical key transmitter sub-assembly could not be confirmed due to wave interference. If the cause of the malfunction has not been stored but the vehicle has been moved and an entry unlock operation has been successfully performed, the possibility of wave interference is high.