Main Body ECU Communication Stop Mode [11/2017 - ]: Procedure

1. Disconnect the cable from the negative (-) battery terminal.
2. Disconnect the main body ECU (multiplex network body ECU) connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   D13-14 (CANH) - D13-13 (CANL)	Cable disconnected from negative (-) battery terminal	54 to 69 Ω

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of wire harness connector (to Main Body ECU (Multiplex Network Body ECU))

4. Reconnect the main body ECU (multiplex network body ECU) connector.

Result: 

NG 

REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) 

Result: 

OK 

See step  2

1. Disconnect the instrument panel block connectors.

   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
   2D-28 - Body ground	Cable disconnected from negative (-) battery terminal	Below 1 Ω

3. Reconnect the cable to the negative (-) battery terminal.
   NOTE:

   When disconnecting the cable, some systems need to be initialized the cable is reconnected.

   Refer to INITIALIZATION [11/2017 - ]

4. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   2F-40 - Body ground	Always	11 to 14 V

   TEXT IN ILLUSTRATION
   
   

   *a	Front view of wire harness connector (to Instrument Panel Junction Block Assembly)

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  3

1. Check the IG signal circuit (Refer to IG Signal Circuit [08/2016 - ] ).

Result: 

OK 

REPLACE MAIN BODY ECU 

(Refer to REMOVAL [12/2015 - ] )

Result: 

NG 

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY 

(Refer to PROCEDURE - Step 2 )