Back Door Entry Unlock Function does not Operate [12/2021 - ]: 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 [12/2021 - ]

   OK

   Back door lock/unlock operate normally.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

GO TO POWER DOOR LOCK CONTROL SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [12/2021 - ] 

Result: 

OK 

See step  2

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

   Body Electrical > Smart Access > Data List 

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

   Body Electrical > Smart Access > Data List 

   Tester Display
   Trunk Lid/Back Door Unlock Switch

   OK

   The GTS display changes correctly in response to the operation of the back door opener switch.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to  REMOVAL [12/2021 - ] 

Result: 

NG 

See step  3

1. Disconnect the I38 certification ECU (smart key ECU assembly) connector.
2. Disconnect the g25 back door opener switch connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   I38-16 (TSW5) - g25-3 (UL)	Always	Below 1 Ω
   I38-16 (TSW5) or g25-3 (UL) - 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 [12/2021 - ]

Result

Result: 

OK 

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to  REMOVAL [12/2021 - ] 

Result: 

NG 

REPLACE BACK DOOR OPENER SWITCH. Refer to  REMOVAL [12/2021 - ]