Certification ECU Communication Stop Mode [08/2015 - ]: Procedure

1. Disconnect the cable from the negative (-) battery terminal.
2. Disconnect the smart key ECU assembly (certification ECU) 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
   I78-14 (CANH) - I78-15 (CANL)	Cable disconnected from negative (-) battery terminal	54 to 69 Ω

   TEXT IN ILLUSTRATION
   
   

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

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

OK: Go to next step 

1. 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
   A43-11 (E) - Body ground	Cable disconnected from negative (-) battery terminal	Below 1 Ω

2. Disconnect the smart key ECU assembly (certification ECU) connector.
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	Switch Condition	Specified Condition
   A43-2 (+B) - Body ground	Ignition switch off	11 to 14 V
   I78-5 (IG) - Body ground	Ignition switch ON	11 to 14 V

   TEXT IN ILLUSTRATION
   
   

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

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT) 

OK → See step   3