Certification ECU Communication Stop Mode [10/2014 - ]: Procedure

1. Disconnect the cable from the negative (-) battery terminal.
2. Disconnect the D64 certification ECU (smart key ECU assembly) connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   TEXT IN ILLUSTRATION
   
   

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

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   D64-14 (CANH) - D64-15 (CANL)	Cable disconnected from negative (-) battery terminal	54 to 69 Ω

NG 

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

OK 

See step  2

1. Disconnect the A28 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

   TEXT IN ILLUSTRATION
   
   

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A28-11 (E) - Body ground	Cable disconnected from negative (-) battery terminal	Below 1 Ω

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

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   A28-2 (+B) - Body ground	Always	11 to 14 V
   D64-5 (IG) - Body ground	Engine switch on (IG)	11 to 14 V

OK 

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) 

Refer to REMOVAL [10/2014 - 10/2015] or REMOVAL [10/2015 - ] )

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)