ECM Communication Stop Mode [04/2013 - 08/2015]: Procedure

1. Disconnect the cable from the negative (-) battery terminal.
2. Disconnect the A77 ECM connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to ECM)

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A77-14 (CANH) - A77-13 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω

   Result

   Result
   OK
   NG

Result: 

NG 

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

Result: 

OK 

See step  2

1. Check the ECM power source circuit.
   • for 2GR-FSE engine

     Refer to ECM Power Source Circuit [04/2013 - 10/2017]

   • for 4GR-FSE engine

     Refer to ECM Power Source Circuit [04/2013 - 08/2015]

   Result

   Result	Proceed to
   OK (for 2GR-FSE engine)	A
   OK (for 4GR-FSE engine)	B
   NG	C

Result: 

A 

REPLACE ECM. Refer to  REMOVAL [04/2013 - 10/2017] 

Result: 

B 

REPLACE ECM. Refer to  REMOVAL [04/2013 - 08/2015] 

Result: 

C 

REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)