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Home >> Lexus >> 2008 >> IS 250 RWD, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 179 (Engine Control System (2GR-FSE) - DTC P050B - P2A03, DTC U0101) >> DTC P2118 Throttle Actuator Control Motor Current Range / Performance >> Inspection Procedure

Inspection Procedure

WARNING: This page is about a different car, the 2008 Lexus IS 350. However, it is still accessible from the selected car via links, so may be relevant.

HINT:

Read freeze frame data using Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air/fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction (See FREEZE FRAME DATA ).

  1. CHECK FUSE (ETCS FUSE) 
    1. Remove the ETCS fuse from the engine room J/B and R/B No. 2.
    2. Measure the resistance of the ETCS fuse.

      Standard resistance: 

      Below 1 Ω 

    3. Reinstall the ETCS fuse.
      Fig 1: Identifying ETCS Fuse
      G05316084Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE ETCS FUSE 

    OK: Go to next step 

  2. INSPECT ECM (+BM VOLTAGE) 
    1. Measure the voltage according to the value(s) in the table below.

    Standard voltage 

    TESTER CONNECTION SPECIFIED CONDITION CHART

    Tester Connection Specified Condition
    +BM (E3-5) - E1 (E4-7) 9 to 14 V
    Fig 2: Identifying Terminals Of E3 And A4 ECM Connectors
    G05316085Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    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.
      1. Remove the ETCS fuse from the engine room J/B and 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 CHART

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

        Standard resistance (Check for short) 

        TESTER CONNECTION SPECIFIED CONDITION CHART

        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.
      Fig 3: Identifying ETCS Fuse
      G05316086Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Check the harness and connector between the ETCS fuse and positive battery cable.
      1. Remove the ETCS fuse from the engine room J/B and 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 CHART

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

        Standard resistance (Check for short) 

        TESTER CONNECTION SPECIFIED CONDITION CHART

        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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