Battery ECU Communication Stop Mode [08/2020 - 08/2021]: Procedure

1. Disconnect the cable from the negative (-) auxiliary battery terminal.
2. Disconnect the y16 battery ECU 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 Battery ECU Assembly)

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   y16-29(CA2H) - y16-28(CA2L)	Cable disconnected from negative (-) auxiliary battery terminal	54 to 69 Ω

   Result

   Result
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (BATTERY ECU ASSEMBLY) 

Result: 

OK 

See step  2

1. Check the battery ECU assembly power source circuit.

   Refer to ECU Power Source Circuit [06/2018 - ]

   Result

   Result
   OK
   NG

Result: 

OK 

REPLACE BATTERY ECU ASSEMBLY. Refer to  REMOVAL [08/2020 - 08/2021] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)