Inspection Procedure: Procedure

1. Turn the ignition switch to ON. Place luggage on the passenger seat to cause the passenger seat belt warning light to blink.
2. When driving the vehicle at 15 km/h (9 mph) or higher, check that the seat belt warning buzzer sounds to inform that the passenger seat belt is not fastened.

   HINT: 

   The key reminder warning system sounds the buzzer built into the combination meter as a key reminder warnings. This buzzer is also used for the seat belt warning system. Therefore, check the operation of the combination meter buzzer by checking if the buzzer sounds to inform that the seat belt is not fastened.

   OK

   Combination meter buzzer sounds.

NG → See step   10 

OK: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / Main Body / Data List.
5. Select D Door Courtesy SW in the Data List and read the Techstream display.
   MAIN BODY
   
   

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

   OK

   ON or OFF appears on the screen according to the driver side door condition.

NG → See step   4 

OK: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / Main Body / Data List.
5. Select Key Unlock Warning SW in the Data List and read the Techstream display.
   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	-

   OK

   ON or OFF appears on the screen according to whether the key is in the ignition key cylinder.

NG → See step   6 

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

1. Remove the driver side front door courtesy light switch (driver side). Refer to REMOVAL .
   Fig 1: 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 body	Courtesy switch pushed (Door closed)	10 kΩ or higher
   1 - Switch body	Courtesy switch free (Door open)	Below 1 Ω

NG → See step   8 

OK: Go to next step 

1. Disconnect the 2A instrument panel junction block connector.
   Fig 2: L3 Front Door Courtesy Light Switch And 2A Instrument Panel Junction Block Connector Terminal Identification

   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
   L3-1 - 2A-21 (DCTY)	Always	Below 1 Ω
   L3-1 - 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 unlock warning switch assembly. Refer to REMOVAL .
   Fig 3: 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	Switch free (Key removed)	10 kΩ or higher
   1 - 2	Switch pushed (Key set)	Below 1 Ω

NG → See step   9 

OK: Go to next step 

1. Disconnect the 2E instrument panel junction block connector.
   Fig 4: Identifying E5 Unlock Warning Switch And 2E Instrument Panel Junction Block Connector Terminals Identification

   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
   E5-1 - 2E-23 (KSW)	Always	Below 1 Ω
   E5-2 - Body ground	Always	Below 1 Ω
   E5-1 - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

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