Back Door Entry Lock Function does not Operate [12/2024 - ]: Procedure

1. When the door control switch on the multiplex network master switch assembly is operated, check that the back door lock and unlock according to the switch operation.

   Refer to OPERATION CHECK [12/2024 - ]

   OK

   Back door lock/unlock operate normally.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REFER TO "POWER DOOR LOCK CONTROL SYSTEM". Refer To  POWER DOOR LOCK CONTROL SYSTEM 

Result: 

OK 

See step  2

1. Read the Data List according to the display on the GTS.

   Body Electrical > Smart Key > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   Trunk Lid/Back Door Lock Switch	Back door control switch (lock switch)	OFF or ON	OFF: Back door control switch (lock switch) not pressed ON: Back door control switch (lock switch) pressed	Displays whether the back door control switch (lock switch) is on or off. Use this Data List item to help determine if there is a switch malfunction when the back door lock function does not operate.

   Body Electrical > Smart Key > Data List 

   Tester Display
   Trunk Lid/Back Door Lock Switch

   HINT: 

   When checking the operation of the entry lock function several times, it can be operated up to 2 times consecutively. To operate the function 3 times or more consecutively, the doors need to be unlocked once. However, this is only for the entry lock function, other door lock operations, such as a wireless door lock operation can be performed consecutively.

   OK

   The GTS display changes correctly in response to the operation of the back door control switch (lock switch).

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) 

Refer to REMOVAL [12/2024 - ]

Result: 

NG 

See step  3

1. Disconnect the K68 certification ECU (smart key ECU assembly) connector.
2. Disconnect the K3 main body ECU (multiplex network body ECU) connector.
3. Disconnect the c1 back door control switch connector.
4. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   K68-17 (TSW6) - c1-2 (SUP)	Always	Below 1 Ω
   K68-17 (TSW6) or c1-2 (SUP) - Other terminals and body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  4

Refer to INSPECTION [12/2024 - ]

Result

Result: 

OK 

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) 

Refer to REMOVAL [12/2024 - ]

Result: 

NG 

REPLACE BACK DOOR CONTROL SWITCH 

Refer to REMOVAL [12/2024 - ]