Main Body ECU Communication Stop Mode [04/2013 - 10/2016]: Procedure

1. Disconnect the cable from the negative (-) battery terminal.
2. Disconnect the K2 main body ECU (multiplex network body ECU) connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   K2-14 (CANH) - K2-13 (CANL)	Cable disconnected from negative (-) battery terminal	54 to 69 Ω

   Result

   Result
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)) 

Result: 

OK 

See step  2

1. Remove main body ECU (multiplex network body ECU).

   Refer to REMOVAL [04/2013 - ]

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

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   MB-11 (GND1) - Body ground	Cable disconnected from negative (-) battery terminal	Below 1 Ω

3. Reconnect the cable to the negative (-) battery terminal.
4. Measure the voltage according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   MB-30 (ACC) - Body ground	Engine switch on (ACC)	11 to 14 V
   MB-31 (BECU) - Body ground	Always	11 to 14 V
   MB-32 (IG) - Body ground	Engine switch on (IG)	11 to 14 V

   Result

   Result
   OK
   NG

Result: 

OK 

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to  REMOVAL [04/2013 - ] 

Result: 

NG 

See step  3

1. Disconnect the cable from the negative (-) battery terminal.
2. Disconnect the 4B instrument panel junction block assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   4B-7 (GND1) - Body ground	Cable disconnected from negative (-) battery terminal	Below 1 Ω

4. Disconnect the 4C, 4E and 4F instrument panel junction block assembly connector.
5. Reconnect the cable to the negative (-) battery terminal.
6. Measure the voltage according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   4B-19 - Body ground	Engine switch on (ACC)	11 to 14 V
   4C-22 - Body ground	Engine switch on (IG)	11 to 14 V
   4E-1 - Body ground	Always	11 to 14 V
   4F-1 - Body ground	Always	11 to 14 V

   Result

   Result
   OK
   NG

Result: 

OK 

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY. Refer to  REMOVAL [04/2013 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)