ECM Communication Stop Mode [10/2015 - ]: Procedure

1. Disconnect the cable from the negative (-) battery terminal.
2. Disconnect the A18 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
   A18-13 (CANH) - A18-26 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω

Result: 

NG 

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

Result: 

OK 

See step  2

1. Check the ECM power source circuit.

   Refer to ECM Power Source Circuit [10/2014 - ]

Result: 

OK 

REPLACE ECM. Refer to  REMOVAL [10/2014 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)