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Certification ECU Communication Stop Mode [12/2013 - ]: Procedure

  1. CHECK CAN BUS LINE FOR DISCONNECTION (CERTIFICATION ECU BRANCH LINE) 
    1. Turn the power switch off.
    2. Disconnect the certification ECU (smart key ECU assembly) connector.
      GTY356027Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      H1-9 (CANH) - H1-10 (CANL) Power switch off 54 to 69 Ω
      TEXT IN ILLUSTRATION

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

    NG → REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (CERTIFICATION ECU) 

    OK: Go to next step 

  2. CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT) 
    1. Measure the resistance according to the value(s) in the table below.
      GTY359294Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Condition Specified Condition
      H1-15 (E) - Body ground Always Below 1 Ω
    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      H1-1 (+B) - Body ground Power switch off 11 to 14 V
      H1-16 (IG) - Body ground Power switch on (IG) 11 to 14 V
      TEXT IN ILLUSTRATION

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

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

    OK → See step   3 

  3. REPLACE SMART KEY ECU ASSEMBLY (CERTIFICATION ECU). Refer to  REMOVAL [12/2013 - ] 
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