Key Lock-in Prevention Function does not Work Properly: Procedure

1. Check that each function of the entry door lock operates normally by using the lock switch.

   OK

   Entry door lock is functioning normally function.

NG → GO TO SMART ACCESS SYSTEM WITH PUSH-BUTTON START 

OK: Go to next step 

1. Check the DATA LIST for proper functioning of the door courtesy light switch.

   Multiplex Network Body ECU

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   D Door Courtesy SW	Driver side door courtesy light switch signal/ON or OFF	ON: Driver side door is unlocked OFF: Driver side door is locked	-

   OK

   ON (driver side door is unlocked) appears on screen.

NG → See step   3 

OK → REPLACE COWL SIDE JUNCTION BLOCK RH (MULTIPLEX NETWORK BODY ECU) 

Fig 1: Inspecting Front Door Courtesy Light Switch Assembly LH

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Remove the courtesy light switch.
2. Measure the resistance of the switch.

   Standard resistance

   Tester Connection	Switch Condition	Specified Condition
   1 - Body ground	Not pushed (ON)	Below 1 Ω
   1 - Body ground	Pushed (OFF)	10 kΩ or higher

NG → REPLACE FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY LH 

OK: Go to next step 

Fig 2: Identifying Terminals Of V7 Switch And U1 ECU Connectors

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the U1 ECU connector.
2. Disconnect the V7 switch connector.
3. Measure the resistance of the wire harness side connector.

   Standard resistance

   Tester Connection	Specified Condition
   U1-14 (DCTY) - V7-1	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK → REPLACE COWL SIDE JUNCTION BLOCK RH (MULTIPLEX NETWORK BODY ECU)