Inspection Procedure

1. Connect a Techstream to the DLC3.
2. Turn the ignition switch ON.
3. Turn the tester on.
4. Enter the following menus: Body Electrical / Main Body / Data List.
5. According to the display on tester, read on the "Data List".

   Main Body 

   DATA LIST - MAIN BODY
   
   

   Tester Display	Measurement Item/Range	Normal Condition
   D Door Courtesy SW	Front door courtesy light switch LH signal / ON or OFF	ON Driver side door is open OFF Driver side door is closed

   OK: ON (driver door is open) appears on the screen. 

NG: GO TO LIGHTING SYSTEM (DOOR COURTESY LIGHT SWITCH CIRCUIT)  (See DOOR COURTESY SWITCH CIRCUIT )

OK: Go to Next Step 

1. Connect a Techstream to the DLC3.
2. Turn the ignition switch ON.
3. Turn the tester on.
4. Enter the following menus: Body Electrical / Main Body / Data List.
5. According to the display on tester, read on the "Data List".

   Main Body 

   DATA LIST - MAIN BODY
   
   

   Tester Display	Measurement Item/Range	Normal Condition
   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 (Key is in ignition key cylinder) appears on the screen. 

NG:  Go to step  4

OK: Go to Next Step 

1. Remove the key from the key cylinder, turn the light control switch to the tail position and open the driver side door.

   OK: The taillight reminder warning buzzer sounds. 

   HINT:

   The key reminder warning buzzer uses the same buzzer as the taillight reminder warning buzzer.

NG: REPLACE COMBINATION METER  (See REMOVAL )

OK : REPLACE MAIN BODY ECU 

1. Remove the unlock warning switch (see REMOVAL  ).
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   RESISTANCE SPECIFICATION
   
   

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

3. Reinstall the unlock warning switch (see INSTALLATION  ).

NG: REPLACE UNLOCK WARNING SWITCH ASSEMBLY  (See REMOVAL  )

Fig 1: Inspecting Unlock Warning Switch

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to Next Step 

1. Disconnect the F21 unlock warning switch connector.
2. Disconnect the 4D main body ECU connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   RESISTANCE SPECIFICATION
   
   

   Tester Connection	Condition	Specified Condition
   F21-1 - 4D-7 (KSW)	Always	Below 1 Ω
   F21-2 - Body ground	Always	Below 1 Ω

4. Reconnect the unlock warning switch connector.
5. Reconnect the main body ECU connector.

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

Fig 2: Identifying Main Body ECU And Unlock Warning Switch Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK : REPLACE MAIN BODY ECU