Luggage Compartment Door Courtesy Switch Circuit [04/2018 - ]: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
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.

   Body Electrical > Main Body > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   Luggage Courtesy SW	Luggage compartment door courtesy switch signal	OFF or ON	OFF: Luggage compartment door closed ON: Luggage compartment door open	-

   Body Electrical > Main Body > Data List 

   Tester Display
   Luggage Courtesy SW

   OK

   Normal conditions listed above are displayed.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [04/2018 - ]  

Result: 

NG 

See step  2

1. Remove the luggage compartment door courtesy light switch (luggage compartment door lock assembly).

   Refer to REMOVAL [04/2018 - ]

2. Inspect the luggage compartment door courtesy light switch (luggage compartment door lock assembly).

   Refer to INSPECTION [04/2018 - ]

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE LUGGAGE COMPARTMENT DOOR COURTESY LIGHT SWITCH (LUGGAGE COMPARTMENT DOOR LOCK ASSEMBLY). Refer to  REMOVAL [04/2018 - ] 

Result: 

OK 

See step  3

1. Disconnect the 4H instrument panel junction block assembly connector.
2. Measure the resistance according to the value (s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   P3-3 (D+) - 4H-34	Always	Below 1 Ω
   P3-3 (D+) or 4H-34 - Body ground	Always	10 kΩ or higher
   P3-2 (E) - Body ground	Always	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  4

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.

   Refer to REMOVAL [04/2018 - 08/2021] , or refer to REMOVAL [08/2021 - ]

2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   4H-34 - MB-4 (LGCY)	Always	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to  REMOVAL [04/2018 - 08/2021]  , or refer to  REMOVAL [08/2021 - ] 

Result: 

NG 

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY. Refer to  REMOVAL [04/2018 - 08/2021]  , or refer to  REMOVAL [08/2021 - ]