Certification ECU Communication Stop Mode: Procedure

1. Disconnect the cable from the negative (-) auxiliary battery terminal.
2. Disconnect the certification ECU (smart key ECU assembly) connector.
   Fig 1: Checking L62 Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   TEXT IN ILLUSTRATION
   
   

   *a	Front 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	Switch Condition	Specified Condition
   L62-9 (CANH) - L62-10 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	54 to 69 Ω

NG → REPAIR OR REPLACE CAN MAIN BUS BRANCH WIRE OR CONNECTOR (CERTIFICATION ECU BRANCH WIRE) 

OK: Go to next step 

1. Measure the resistance according to the value(s) in the table below.
   Fig 2: Checking L62 Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   L62-15 (E) - Body ground	Cable disconnected from negative (-) auxiliary battery terminal	Below 1 Ω

   TEXT IN ILLUSTRATION
   
   

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

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (GROUND CIRCUIT) 

OK: Go to next step 

1. Connect the cable to the negative (-) auxiliary battery terminal.
2. Measure the voltage according to the value(s) in the table below.
   Fig 3: Checking L62 Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   L62-1 (+B) - Body ground	Power switch off	11 to 14 V
   L62-16 (IG) - Body ground	Power switch on (IG)	11 to 14 V

   TEXT IN ILLUSTRATION
   
   

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

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

OK → See step   4