Keyless Access Lock/Unlock cannot be Performed from Any of the Doors [11/2021 - ]: Procedure

1. Using the keyless function of the electrical key transmitter sub-assembly, check the operation of the door lock.

   Does it lock/unlock normally?

   Result	Proceed to
   Yes (Check the exterior antenna, touch sensor, lock/unlock button.)	A
   No	B

Result: 

A 

CHECK THE EXTERIOR ANTENNA, TOUCH SENSOR, LOCK/UNLOCK BUTTON. Refer to  OPERATION CHECK [11/2021 - ] 

Result: 

B 

See step  2

1. Check for whether lock and unlock is possible with the registered electrical key transmitter sub-assembly.

   Is there any electrical key transmitter sub-assembly which can lock/unlock when the touch sensor is operated?

   Result	Proceed to
   Yes (Check the electrical key transmitter sub-assembly that does not operate.)	A
   No	B

Result: 

B 

See step  4

Result: 

A 

See step  3

1. Measure the battery voltage of the electrical key transmitter sub-assembly that does not operate.

   Is the voltage 2.5 - 3.2 V?

   Result	Proceed to
   Yes (Replace the electrical key transmitter sub-assembly.)	A
   No (Replace the battery.)	B

Result: 

A 

REPLACE ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY 

Result: 

B 

REPLACE BATTERY. Refer to  REPLACEMENT [11/2021 - ] 

1. Operate the driver's center door lock switch.

   Does the door lock operate?

   Result	Proceed to
   Yes	A
   No (Check the door lock control system.)	B

Result: 

B 

CHECK POWER DOOR LOCK CONTROL SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [11/2021 - ] 

Result: 

A 

See step  5

1. Using a tester, measure the voltage between the smart key ECU assembly connector and chassis ground.

   Connector & terminal

   F8-1 (+B2) (+) - Chassis ground (-)

   F8-4 (+B1) (+) - Chassis ground (-)

   Is the voltage 10 V or more when the ignition switch is turned to ON?

   Result	Proceed to
   Yes	A
   No (Check the smart key ECU assembly power supply circuit.)	B

Result: 

B 

CHECK SMART KEY ECU ASSEMBLY POWER SUPPLY CIRCUIT 

Result: 

A 

See step  6

1. Using a tester, measure the resistance between the smart key ECU assembly connector and chassis ground.

   Connector & terminal

   F8-20 (GND1) - Chassis ground

   F9-17 (GND2) - Chassis ground

   Is the resistance less than 10 Ω?

   Result	Proceed to
   Yes (Replace the smart key ECU assembly.)	A
   No (Repair or replace the open circuit of harness.)	B

Result: 

A 

REPLACE SMART KEY ECU ASSEMBLY. Refer to  REMOVAL [11/2021 - ] 

Result: 

B 

REPAIR OR REPLACE THE OPEN CIRCUIT OF HARNESS