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

1. Connect the Techstream.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / Main Body / Data List.
5. Read the Data List according to the display on the Techstream.
   MAIN BODY
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Key Unlock Warning SW	Unlock warning switch signal / ON or OFF	ON: Key is in ignition key cylinder OFF: No key is in ignition key cylinder	-
   D Door Courtesy SW	Driver door courtesy light switch signal / ON or OFF	ON: Driver door is open OFF: Driver door is closed	-
   P Door Courtesy SW	Front passenger door courtesy light switch signal / ON or OFF	ON: Front passenger door is open OFF: Front passenger door is closed	-

   OK

   The Techstream indicates ON or OFF according to the switch operation as shown in the table.

   Result

   Result	Proceed to
   OK	A
   NG (Unlock Warning Switch)	B
   NG (Front Door Courtesy Light Switch (Driver Side))	C
   NG (Front Door Courtesy Light Switch (Passenger Side))	D

B → See step   2 

C → See step   5 

D → See step   7 

A → REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK) 

1. Remove the unlock warning switch. Refer to REMOVAL .
   Fig 1: Inspecting Unlock Warning Switch Assembly

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Switch Condition	Specified Condition
   1 - 2	Pushed (ON)	10 kΩ or higher
   1 - 2	Free (OFF)	Below 1 Ω

NG → See step   10 

OK: Go to next step 

1. Disconnect the instrument panel junction block connector.
   Fig 2: Checking E6 Unlock Warning Switch & 2E Instrument Panel Junction Block Connectors

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   E6-1 - 2E-23 (KSW)	Always	Below 1 Ω
   E6-1 - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Measure the resistance according to the value(s) in the table below.
   Fig 3: Checking E6 Unlock Warning Switch Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   E6-2 - Body ground	Always	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK) 

1. Remove the front door courtesy light switch (driver side). Refer to REMOVAL .
   Fig 4: Inspecting Front Door Courtesy Light Switch Assembly (Driver Side)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Switch Condition	Specified Condition
   1 - Switch ground	Free (ON)	Below 1 Ω
   1 - Switch ground	Pushed (OFF)	10 kΩ or higher

NG → See step   9 

OK: Go to next step 

1. Disconnect the instrument panel junction block connector.
   Fig 5: Checking L18 Front Door Courtesy Light Switch & 2A Instrument Panel Junction Block Connectors

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   L18-1 - 2A-21 (DCTY)	Always	Below 1 Ω
   L18-1 - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK) 

1. Remove the front door courtesy light switch (passenger side). Refer to REMOVAL .
   Fig 6: Inspecting Front Door Courtesy Light Switch Assembly (Passenger Side)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Switch Condition	Specified Condition
   1 - Switch ground	Free (ON)	Below 1 Ω
   1 - Switch ground	Pushed (OFF)	10 kΩ or higher

NG → See step   11 

OK: Go to next step 

1. Disconnect the instrument panel junction block connector.
   Fig 7: Checking M15 Front Door Courtesy Light Switch And 2E Instrument Panel Junction Block Connectors

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   M15-1 - 2E-20 (PCTY)	Always	Below 1 Ω
   M15-1 - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)