Certification ECU Communication Stop Mode (2016 - 2017): Procedure

1. Disconnect the cable from the negative (-) auxiliary battery terminal.
2. Disconnect the H57 certification ECU (smart key ECU assembly) connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   H57-14 (CANH) - H57-15 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	54 to 69 Ω

   TEXT IN ILLUSTRATION
   
   

   *a	Rear view of wire harness connector (to Certification ECU (Smart Key ECU Assembly)

Result:  NG

NG 

REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) 

Result:  OK

See step  2

1. Disconnect the A70 certification ECU (smart key ECU assembly) connector.
2. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A70-11 (E) - Body ground	Cable disconnected from negative (-) auxiliary battery terminal	Below 1 Ω

3. Connect the cable to the negative (-) auxiliary battery terminal.
4. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   A70-2 (+B) - Body ground	Power switch off	11 to 14 V
   H57-5 (IG) - Body ground	Power switch on (IG)	11 to 14 V

   TEXT IN ILLUSTRATION
   
   

   *a	Rear view of wire harness connector (to Certification ECU (Smart Key ECU Assembly)

Result:  OK

OK 

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) 

(Refer to REMOVAL (2016 - 2017) )

Result:  NG

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)