Motor Generator Control ECU Communication Stop Mode [12/2019 - 11/2023]: Procedure

1. Disconnect the cable from the negative (-) auxiliary battery terminal.
2. Disconnect the A55 inverter with converter assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A55-22 (CANH) - A55-31 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	54 to 69 Ω

   FOR AWD
   
   

   Tester Connection	Condition	Specified Condition
   A55-24 (CNH2) - A55-33 (CNL2)	Cable disconnected from negative (-) auxiliary battery terminal	54 to 69 Ω

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *A	for AWD
   *a	Front view of wire harness connector (to Inverter with Converter Assembly)

   Result

   Result
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (INVERTER WITH CONVERTER ASSEMBLY) 

Result: 

OK 

See step  2

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A55-9 (GND1) - Body ground	Cable disconnected from negative (-) auxiliary battery terminal	Below 1 Ω

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to Inverter with Converter Assembly)

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

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   A55-26 (IGCT) - Body ground	Ignition switch ON	11 to 14 V
   A55-35 (+B2) - Body ground	Ignition switch ON	11 to 14 V
   A55-36 (+B) - Body ground	Ignition switch ON	11 to 14 V

   Result

   Result
   OK
   NG

Result: 

OK 

REPLACE INVERTER WITH CONVERTER ASSEMBLY 

Refer to REMOVAL [12/2019 - 10/2022] , or refer to REMOVAL [10/2022 - 11/2023]

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)