All Doors LOCK/UNLOCK Functions do not Operate Via Door Control Switch [06/2018 - ]: 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
   Door Lock SW-Lock	Door control switch assembly lock signal	OFF or ON	OFF: Lock side of door control switch assembly not pushed ON: Lock side of door control switch assembly pushed	-
   Door Lock SW-Unlock	Door control switch assembly unlock signal	OFF or ON	OFF: Unlock side of door control switch assembly not pushed ON: Unlock side of door control switch assembly pushed	-

   Body Electrical > Main Body > Data List 

   Tester Display
   Door Lock SW-Lock
   Door Lock SW-Unlock

   OK

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

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to  REMOVAL [06/2018 - 08/2021]  , or refer to  REMOVAL [08/2021 - 09/2022]  , or refer to  REMOVAL [09/2022 - ] 

Result: 

NG 

See step  2

1. Remove the door control switch assembly.

   Refer to REMOVAL [06/2018 - ]

2. Inspect the door control switch assembly.

   Refer to INSPECTION [06/2018 - ]

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE DOOR CONTROL SWITCH ASSEMBLY. Refer to  REMOVAL [06/2018 - ] 

Result: 

OK 

See step  3

1. Disconnect the 3A and 3D instrument panel junction block assembly connectors.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   J4-2 (UL) - 3A-39	Always	Below 1 Ω
   J4-4 (L) - 3D-16	Always	Below 1 Ω
   J4-5 (E) - Body ground	Always	Below 1 Ω
   3A-39 or J4-2 (UL) - Body ground	Always	10 kΩ or higher
   3D-16 or J4-4 (L) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  4

1. Remove the instrument panel junction block assembly.

   Refer to REMOVAL [06/2018 - 08/2021] , or refer to REMOVAL [08/2021 - 09/2022] , or refer to REMOVAL [09/2022 - ]

2. Remove the main body ECU (multiplex network body ECU).

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a

   Component without harness connected (Instrument Panel Junction Block Assembly)

   -

   -

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   MB-22 (UL1) - 3A-39	Always	Below 1 Ω
   MB-20 (L1) - 3D-16	Always	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to  REMOVAL [06/2018 - 08/2021]  , or refer to  REMOVAL [08/2021 - 09/2022]  , or refer to  REMOVAL [09/2022 - ] 

Result: 

NG 

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY. Refer to  REMOVAL [06/2018 - 08/2021]  , or refer to  REMOVAL [08/2021 - 09/2022]  , or refer to  REMOVAL [09/2022 - ]