Sub Battery Module Communication Stop Mode [01/2017 - 05/2023]: Procedure

1. Disconnect the cable from the negative (-) auxiliary battery terminal.
2. Disconnect the sub-battery with control assembly connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to Sub-battery with Control Assembly)

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   b5-3 (CANH) - b5-10 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	54 to 69 Ω

   Result

   Result
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE CAN BUS BRANCH WIRE OR CONNECTOR (SUB-BATTERY WITH CONTROL ASSEMBLY) 

Result: 

OK 

See step  2

1. Disconnect the sub-battery with control assembly connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a

   Front view of wire harness connector (to Sub-battery with Control Assembly)

   -

   -

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   m1-1 (-BAT) - Body ground	Cable disconnected from negative (-) auxiliary battery terminal	Below 1 Ω

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

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

   Refer to INITIALIZATION [01/2017 - 04/2020] , or refer to INITIALIZATION [04/2020 - 05/2023]

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

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   b5-7 (B) - Body ground	Power switch off	11 to 14 V
   b5-14 (IG) - Body ground	Power switch on (IG)	11 to 14 V
   	Power switch off	Below 1 V

   Result

   Result
   OK
   NG

Result: 

OK 

REPLACE SUB-BATTERY WITH CONTROL ASSEMBLY. Refer to  REMOVAL [01/2017 - 05/2023] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)