ECM Communication Stop Mode [10/2014 - 09/2017]: Procedure

1. Disconnect the cable from the negative (-) auxiliary battery terminal.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

2. Disconnect the ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A35-13 (CANH) - A35-26 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (ECM) 

Result: 

OK 

See step  2

1. 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 [10/2014 - 09/2017]

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a

   Front view of wire harness connector (to ECM)

   -

   -

2. Disconnect the ECM connector.
3. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   A35-1 (BATT) - Body ground	Power switch off	11 to 14 V
   A35-2 (+B) - Body ground	Auxiliary battery voltage applied to terminal A35-46 (MREL)	11 to 14 V
   A35-3 (+B2) - Body ground	Auxiliary battery voltage applied to terminal A35-46 (MREL)	11 to 14 V
   A35-37 (IGSW) - Body ground	Power switch on (IG)	11 to 14 V

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   C48-16 (E1) - Body ground	Always	Below 1 Ω
   C48-49 (E02) - Body ground	Always	Below 1 Ω
   C48-50 (E01) - Body ground	Always	Below 1 Ω
   C48-58 (ME01) - Body ground	Always	Below 1 Ω
   C48-53 (E04) - Body ground	Always	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result: 

OK 

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

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR