Interior Light 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 / Active Test.
5. Perform the Active Test according to the display on the Techstream.

   Body Electrical > Main Body > Active Test 

   Tester Display	Measurement Item	Control Range	Diagnostic Note
   Illuminated Entry System	Turns on the lights that are controlled by the illuminated entry system*	OFF or ON	Perform the Active Test with the door linked switch of the map light (roof console box sub-assembly) on and switches of the spot light assembly LH and RH off.

   1. *: Refer to System Description for the lights that are controlled by the illuminated entry system.

      Refer to SYSTEM DESCRIPTION [04/2018 - ] 

   Body Electrical > Main Body > Active Test 

   Tester Display
   Illuminated Entry System

   OK

   All lights that are controlled by the illuminated entry system come on.

   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 map light (roof console box sub-assembly).

   Refer to REMOVAL [04/2018 - ]

2. Inspect the map light (roof console box sub-assembly).

   Refer to INSPECTION [04/2018 - ]

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE MAP LIGHT (ROOF CONSOLE BOX SUB-ASSEMBLY). Refer to  REMOVAL [04/2018 - ] 

Result: 

OK 

See step  3

1. Remove the spot light assembly.

   Refer to REMOVAL [04/2018 - ]

2. Inspect the spot light assembly.

   Refer to INSPECTION [04/2018 - ]

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE SPOT LIGHT ASSEMBLY. Refer to  REMOVAL [04/2018 - ] 

Result: 

OK 

See step  4

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

   Standard Resistance

   W/O SLIDING ROOF
   
   

   Tester Connection	Condition	Specified Condition
   O9-10 (+B1) - O8-5 (B)	Always	Below 1 Ω
   O9-2 (RLMP) - O8-2 (CTY)	Always	Below 1 Ω
   O9-10 (+B1) or O8-5 (B) - Body ground	Always	10 kΩ or higher
   O9-2 (RLMP) or O8-2 (CTY) - Body ground	Always	10 kΩ or higher

   W/ SLIDING ROOF
   
   

   Tester Connection	Condition	Specified Condition
   O10-14 (+B1) - O8-5 (B)	Always	Below 1 Ω
   O10-2 (RLMP) - O8-2 (CTY)	Always	Below 1 Ω
   O10-14 (+B1) or O8-5 (B) - Body ground	Always	10 kΩ or higher
   O10-2 (RLMP) or O8-2 (CTY) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  5

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

   Standard Resistance

   W/O SLIDING ROOF
   
   

   Tester Connection	Condition	Specified Condition
   4D-10 - O9-10 (+B1)	Always	Below 1 Ω
   4D-29 - O9-1 (DOOR)	Always	Below 1 Ω
   4D-10 or O9-10 (+B1) - Body ground	Always	10 kΩ or higher
   4D-29 or O9-1 (DOOR) - Body ground	Always	10 kΩ or higher

   W/ SLIDING ROOF
   
   

   Tester Connection	Condition	Specified Condition
   4D-10 - O10-14 (+B1)	Always	Below 1 Ω
   4D-29 - O10-1 (DOOR)	Always	Below 1 Ω
   4D-10 or O10-14 (+B1) - Body ground	Always	10 kΩ or higher
   4D-29 or O10-1 (DOOR) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  6

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
   4D-29 - MB-1 (ILE)	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 - ]