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DTC P2118: Throttle Actuator Control Motor Current Range / Performance: Procedure

WARNING: This page is about a different car, the 2009 Lexus IS 250. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK FUSE (ETCS FUSE) 
    1. Remove the ETCS fuse from the engine room R/B No. 2.
      Fig 1: Identifying ETCS Fuse
      GTY127920Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance of the ETCS fuse.

      Standard resistance

      Below 1 Ω

    3. Reinstall the ETCS fuse.

    NG → REPLACE FUSE 

    OK: Go to next step 

  2. INSPECT ECM (+BM VOLTAGE) 
    1. Measure the voltage according to the value(s) in the table below.
      Fig 2: Identifying ECM Connectors
      GTY146351Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard voltage

      Tester Connection Specified Condition
      +BM (E3-5) - E1 (E4-7) 9 to 14 V

    OK → CHECK FOR INTERMITTENT PROBLEMS 

    NG: Go to next step 

  3. CHECK HARNESS AND CONNECTOR (ECM - ETCS FUSE, ETCS FUSE - BATTERY) 
    1. Check the harness and connector between the ETCS fuse and ECM.
      Fig 3: Identifying ECM E3 Connector & ETCS Fuse
      GTY145504Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Remove the ETCS fuse from the engine room R/B No. 2.
      2. Disconnect the E3 ECM connector.
      3. Measure the resistance according to the value(s) in the table below.

        Standard resistance (Check for open)

        Tester Connection Specified Condition
        ETCS fuse (2) - +BM (E3-5) Below 1 Ω

        Standard resistance (Check for short)

        Tester Connection Specified Condition
        ETCS fuse (2) or +BM (E3-5) - Body ground 10 kΩ or higher
      4. Reinstall the ETCS fuse.
      5. Reconnect the ECM connector.
    2. Check the harness and connector between the ETCS fuse and positive battery cable.
      1. Remove the ETCS fuse from the engine room R/B No. 2.
      2. Disconnect the positive battery cable.
      3. Measure the resistance according to the value(s) in the table below.

        Standard resistance (Check for open)

        Tester Connection Specified Condition
        Positive battery cable - ETCS fuse (1) Below 1 Ω

        Standard resistance (Check for short)

        Tester Connection Specified Condition
        Positive battery cable or ETCS fuse (1) - Body ground 10 kΩ or higher
      4. Reinstall the ETCS fuse.
      5. Reconnect the positive battery cable.

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK → REPLACE ECM 

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