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Inspection Procedure

  1. READ VALUE OF INTELLIGENT TESTER OR TECHSTREAM (IG2 RELAY MONITOR (INSIDE)) 
    1. Use the Data List to check if the IG2 relay is functioning properly.
      1. Intelligent tester

        MAIN BODY 

        INTELLIGENT TESTER MAIN BODY REFERENCE

        Tester Display Measurement Item/Range Normal Condition Diagnostic Note
        IG2 RELAY MON2 IG2 inner relay monitor/ON or OFF ON: Engine switch on (IG)
        OFF: Engine switch off        		 -
      2. Techstream

        Main Body 

        TECHSTREAM MAIN BODY REFERENCE

        Tester Display Measurement Item/Range Normal Condition Diagnostic Note
        IG2 Relay Monitor (Inside) IG2 inner relay monitor/ON or OFF ON: Engine switch on (IG)
        OFF: Engine switch off        		 -

        OK: When the engine switch is turned on (IG), ON is displayed on the tester. 

    NG: Go to step   3 

    OK: GO TO NEXT STEP 

  2. CHECK ENGINE SWITCH (SWITCH CONDITION) 
    1. Ensure the key is inside the cabin.
    2. Check that the power source mode changes as shown below each time the engine switch is pushed.

      OK: off → on (ACC) → on (IG) → off 

    NG: GO TO  POWER SOURCE MODE DOES NOT CHANGE  

    OK: NORMAL 

  3. INSPECT IGNITION RELAY NO.2 (IG2) 
    1. Remove the ignition relay No. 2 from the engine room No. 2 junction block.
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      IGNITION RELAY NO. 2 (IG2)

      Tester Connection Condition Specified Condition
      3-5 When battery voltage is not applied to terminals 1 and 2 10 kΩ or higher
      3-5 When battery voltage is applied to terminals 1 and 2 Below 1 Ω
      Fig 1: Inspecting Ignition Relay No. 2 (IG2)
      G04943833Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE IGNITION RELAY NO. 2 (IG2) 

    OK: GO TO NEXT STEP 

  4. CHECK HARNESS AND CONNECTOR (IG2 RELAY - MAIN BODY ECU AND BODY GROUND) 
    Fig 2: Checking Harness And Connector (IG2 Relay - Main Body ECU And Body Ground)
    G04943834Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Remove the IG2 relay from the engine room No. 2 junction block.
    2. Disconnect the L12 main body ECU connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      IG2 RELAY - MAIN BODY ECU AND BODY GROUND

      Tester Connection Condition Specified Condition
      Relay block IG2 relay terminal 1 - L12-11 (IG2D) Always Below 1 Ω
      Relay block IG2 relay terminal 2 - Body ground Always Below 1 Ω
      Relay block IG2 relay terminal 1 or L12-11 (IG2D) -Body ground Always 10 kΩ or higher

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: REPLACE MAIN BODY ECU 

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