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

1. Move the room light switch to the DOOR position and open the driver side door. Then check that the room light illuminates.

   OK

   Room light illuminates.

OK → See step   4 

NG: Go to next step 

1. Remove the courtesy light switch.
   Fig 1: Identifying Terminals Of Courtesy Light Switch Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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 (DRIVER SIDE) 

OK: Go to next step 

1. Disconnect the D9 switch connector.
   Fig 2: Identifying D9 Switch Connector And 1A Junction Block Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the 1A junction block connector.
3. Measure the resistance of the wire harness side connectors.

   Standard resistance

   Tester Connection	Specified Condition
   D9-1 - 1A-21 (DCTY)	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK: Go to next step 

1. Remove the unlock warning switch.
   Fig 3: Identifying Unlock Warning Switch

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance of the switch.

   Standard resistance

   Tester Connection	Switch Condition	Specified Condition
   1 - 2	Not pushed	10 kΩ or higher
   1 - 2	Pushed	Below 1 Ω

NG → REPLACE UNLOCK WARNING SWITCH ASSEMBLY 

OK: Go to next step 

1. Disconnect the U1 switch connector.
   Fig 4: Identifying U1 Switch Connector And 1E Junction Block Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the 1E junction block connector.
3. Measure the resistance of the wire harness side connectors.

   Standard resistance

   Tester Connection	Specified Condition
   U1-2 - 1E-26 (KSW)	Below 1 Ω
   U1-1 - Body ground	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK: Go to next step 

1. After replacing the integration relay with a normally functioning relay, check that the power door lock operates normally.

   OK

   Power door lock operates normally.

NG → REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY 

OK → NORMAL (INTEGRATION RELAY DEFECTIVE)