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Inspection Procedure

  1. CHECK HARNESS AND CONNECTOR (COMMUNICATION LINE) 
    1. Disconnect the R24 and L93 ECU connectors.
      2. Fig 1: Identifying R24 And L93 ECU Connector Terminals
      G04945823Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value (s) in the table below.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART

      Tester Connection Condition Specified Condition
      R24-23 (MPX1) - L93-5 (S1) Always Below 1 Ω

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to Next Step 

  2. CHECK HARNESS AND CONNECTOR (MAYDAY ECU - VEHICLE BATTERY AND BODY GROUND) 
    1. Disconnect the R24 ECU connector.
      2. Fig 2: Identifying R24 ECU Connector Terminals
      G05853212Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage and resistance according to the value (s) in the table below.

      Standard voltage 

      TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART

      Tester Connection Condition Specified Condition
      R24-1 (+B) - Body ground Always 11 to 14 V

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART

      Tester Connection Condition Specified Condition
      R24-12 (E) - Body ground Always Below 1 Ω

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: REPLACE MAYDAY ECU TOGETHER WITH MAYDAY BATTERY AND THEN PERFORM REGISTRATION 

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