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Power Source Mode does not Change to ON (IG) [03/2017 - ]: Procedure

  1. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - IG2 RELAY) 
    1. Disconnect the D48 certification ECU (smart key ECU assembly) connector.
    2. Remove the IG2 relay from the engine room relay block.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      D48-9 (IG2D) - IG2 relay terminal 2 Always Below 1 Ω
      IG2 relay terminal 1 - Body ground Always Below 1 Ω

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  2

  2. INSPECT IG2 RELAY 
    1. Inspect the IG2 relay (Refer to PROCEDURE - Step 4 ).

    Result: 

    NG 

    REPLACE IG2 RELAY 

    Result: 

    OK 

    See step  3

  3. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY) 
    1. Disconnect the D41 certification ECU (smart key ECU assembly) connector.
    2. Disconnect the 3A instrument panel junction block assembly connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Connection Specified Condition
      D41-6 (IG1D) - 3A-15 Always Below 1 Ω
      3A-12 - Body ground Always Below 1 Ω

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  4

  4. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY ((IG1 NO. 1, IG1 NO. 2, IG1 NO. 3, IG1 NO. 4 RELAY) 
    1. Remove the instrument panel junction block assembly (Refer to REMOVAL [06/2016 - ] ).
    2. Remove the main body ECU (network gateway ECU) from the instrument panel junction block assembly.
    3. Measure the resistance according to the value(s) in the table below.
      GTY703025Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *a Component without harness connected
      (Instrument Panel Junction Block Assembly)      		 - -

      Standard Resistance

      Tester Connection Connection Specified Condition
      3E-1 - 3C-35 Battery voltage not applied to terminals 3A- 15 and 3A-12 10 kΩ or higher
      Battery voltage applied to terminals 3A- 15 and 3A-12 Below 1 Ω
      3E-1 - 3C-34 Battery voltage not applied to terminals 3A- 15 and 3A-12 10 kΩ or higher
      Battery voltage applied to terminals 3A- 15 and 3A-12 Below 1 Ω
      3E-1 - 3A-32 Battery voltage not applied to terminals 3A- 15 and 3A-12 10 kΩ or higher
      Battery voltage applied to terminals 3A- 15 and 3A-12 Below 1 Ω
      3E-1 - 3A-3 Battery voltage not applied to terminals 3A- 15 and 3A-12 10 kΩ or higher
      Battery voltage applied to terminals 3A- 15 and 3A-12 Below 1 Ω

    Result: 

    NG 

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY. Refer to  REMOVAL [06/2016 - ] 

    Result: 

    OK 

    See step  5

  5. INSPECT CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) 
    1. Reconnect the D41 and D48 certification ECU (smart key ECU assembly) connectors.
    2. Measure the voltage according to the value(s) in the table below.
      GTY704559Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *a Component with harness connected
      (Certification ECU (Smart Key ECU Assembly))      		 - -

      Standard Voltage

      Tester Connection Switch Condition Specified Condition
      D41-6 (IG1D) - Body ground Engine switch on (ACC) → Engine switch on (IG) Below 1 V → 9 V or higher
      D48-9 (IG2D) - Body ground Engine switch on (ACC) → Engine switch on (IG) Below 1 V → 9 V or higher

    Result: 

    OK 

    CHECK RELAY CONTACT SIDE CIRCUIT 

    Result: 

    NG 

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to  REMOVAL [03/2017 - ] 

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