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Inspection Procedure

  1. Are there any other codes (besides DTC P3115) being output? 

    YES: Go to relevant DTC chart  .

    NO: Go to Next Step 

  2. Check for open and short in wire harness between HV ECU terminals (V+, IB V-) and system main relay terminals (6, 7, 2)  .

    Preparation: 

    1. Disconnect the connector from the battery ECU.
    2. Disconnect the connector from the system main relay.

      Check: 

      Check that the wire harness between the battery ECU and the system main relay is short and open.

      OK: No short and open 

      NG: Repair or replace the wire harness  .

      OK: Go to Next Step 

    3. Check resistance of HV battery current sensor (In system main relay)  .

      Check: 

      Using an ohmmeter, measure the resistance between terminals.

      OK: 

      Fig 1: Identifying HV Battery Current Sensor Connector Terminals
      G02805607Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      STANDARD RESISTANCE

      Terminal No. (Tester+) Terminal No. (Tester-) Resistance
      6 7 30 - 50 kΩ
      6 2 More than 10 MΩ
      7 6 30 - 50 kΩ
      7 2 More than 10 MΩ
      2 6 300 - 400 kΩ
      2 7 3-5 MΩ

      NG: Replace the system main relay  .

      OK: Check fitting of connector S8 of system main relay and correct if necessary  .

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