ECM Communication Stop Mode [08/2021 - ]: Procedure

1. Check vehicle type.

   Result

   Result	Proceed to
   for 2GR-FKS	A
   for A25A-FKS	B

Result: 

B 

See step  4

Result: 

A 

See step  2

1. Disconnect the cable from the negative (-) battery terminal.
2. Disconnect the A25 ECM 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 ECM)

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A25-13 (CANH) - A25-26 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω

   Result

   Result
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (ECM) 

Result: 

OK 

See step  3

1. Check the ECM power source circuit.

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

   Result

   Result
   OK
   NG

Result: 

OK 

REPLACE ECM. Refer to  REMOVAL [08/2021 - 09/2022]  , or refer to  REMOVAL [09/2022 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT) 

1. Disconnect the cable from the negative (-) battery terminal.
2. Disconnect the A28 ECM 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 ECM)

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A28-8 (CANH) - A28-18 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω

   Result

   Result
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (ECM) 

Result: 

OK 

See step  5

1. Check the ECM power source circuit.

   Refer to ECM Power Source Circuit [08/2020 - ]

   Result

   Result
   OK
   NG

Result: 

OK 

REPLACE ECM. Refer to  REMOVAL [08/2021 - 09/2022]  , or refer to  REMOVAL [09/2022 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)