LEMON Manuals: Even more car manuals for everyone
Home >> Toyota >> 2008 >> Yaris Base, 2D Hatchback, Standard >> Repair and Diagnosis >> Engine Performance >> Engine Control System (1NZ-FE) >> SFI System >> Fuel Injector Circuit >> Inspection Procedure

Inspection Procedure

  1. INSPECT FUEL INJECTOR (POWER SOURCE) 
    1. Disconnect the fuel injector connectors.
      2. Fig 1: Identifying Fuel Injector Connector Terminals - Front View
      G05590764Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Turn the ignition switch to ON.
    3. Measure the voltage according to the value(s) in the table below.

      Standard voltage 

      TESTER CONNECTIONS SPECIFIED CONDITIONS CHART

      Tester Connections Specified Conditions
      C4-1 - Body ground 11 to 14 V
      C5-1 - Body ground 11 to 14 V
      C6-1 - Body ground 11 to 14 V
      C7-1 - Body ground 11 to 14 V
    4. Reconnect the fuel injector connectors.

    NG:  Go to step  6

    OK: Go to Next Step 

  2. INSPECT FUEL INJECTOR (INJECTOR RESISTANCE) 
    1. Disconnect the fuel injector connectors.
      2. Fig 2: Identifying Fuel Injector Connector Terminals
      G05590765Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      TESTER CONNECTIONS SPECIFIED CONDITIONS CHART

      Tester Connections Specified Conditions
      1 - 2 11.6 to 12.4 Ω at 20°C (68°F)
    3. Reconnect the fuel injector connectors.

    NG: REPLACE FUEL INJECTOR  (See REMOVAL )

    OK: Go to Next Step 

  3. CHECK HARNESS AND CONNECTOR (FUEL INJECTOR - ECM) 
    1. Disconnect the C20 ECM connector.
      2. Fig 3: Identifying Fuel Injector Connector And ECM Connector
      G05590766Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the fuel injector connectors.
    3. Measure the resistance according to the value(s) in the table below.

      Standard resistance (Check for open) 

      TESTER CONNECTIONS SPECIFIED CONDITIONS CHART

      Tester Connections Specified Conditions
      C4-2 - C20-108 (#10) Below 1 Ω
      C5-2 - C20-107 (#20) Below 1 Ω
      C6-2 - C20-106 (#30) Below 1 Ω
      C7-2 - C20-105 (#40) Below 1 Ω

      Standard resistance (Check for short) 

      TESTER CONNECTIONS SPECIFIED CONDITIONS CHART

      Tester Connections Specified Conditions
      C4-2 or C20-108 (#10) - Body ground 10 kΩ or higher
      C5-2 or C20-107 (#20) - Body ground 10 kΩ or higher
      C6-2 or C20-106 (#30) - Body ground 10 kΩ or higher
      C7-2 or C20-105 (#40) - Body ground 10 kΩ or higher
    4. Reconnect the fuel injector connectors.
    5. Reconnect the ECM connector.

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to Next Step 

  4. CHECK HARNESS AND CONNECTOR (ECM - BODY GROUND) 
    1. Disconnect the C20 ECM connector.
      2. Fig 4: Identifying ECM Connector Terminals
      G05590767Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance (Check for open) 

      TESTER CONNECTIONS SPECIFIED CONDITIONS CHART

      Tester Connections Specified Conditions
      C20-45 (E01) - Body ground Below 1 Ω
      C20-44 (E02) - Body ground Below 1 Ω
    3. Reconnect the ECM connector.

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to Next Step 

  5. INSPECT FUEL INJECTOR (INJECTION AND VOLUME) 
    1. Check the fuel injector injection and volume (See INSPECTION ).

    NG: REPLACE FUEL INJECTOR  (See REMOVAL )

    OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE (See  PROBLEM SYMPTOMS TABLE   ) 

  6. CHECK HARNESS AND CONNECTOR (FUEL INJECTOR - INTEGRATION RELAY) 
    1. Disconnect the fuel injector connectors.
    2. Remove the integration relay from the engine room relay block.
      3. Fig 5: Identifying Integration Relay
      G05590768Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Measure the resistance according to the value(s) in the table below.

      Standard resistance (Check for open) 

      TESTER CONNECTIONS SPECIFIED CONDITIONS CHART

      Tester Connections Specified Conditions
      C4-1 - 1B-4 (Integration relay) Below 1 Ω
      C5-1 - 1B-4 (Integration relay) Below 1 Ω
      C6-1 - 1B-4 (Integration relay) Below 1 Ω
      C7-1 - 1B-4 (Integration relay) Below 1 Ω

      Standard resistance (Check for short) 

      TESTER CONNECTIONS SPECIFIED CONDITIONS CHART

      Tester Connections Specified Conditions
      C4-1 or 1B-4 (Integration relay) -Body ground 10 kΩ or higher
      C5-1 or 1B-4 (Integration relay) -Body ground 10 kΩ or higher
      C6-1 or 1B-4 (Integration relay) -Body ground 10 kΩ or higher
      C7-1 or 1B-4 (Integration relay) -Body ground 10 kΩ or higher
    4. Reconnect the fuel injector connectors.
    5. Reinstall the integration relay.

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: REPAIR OR REPLACE ECM POWER SOURCE CIRCUIT (See  ECM POWER SOURCE CIRCUIT   ) 

scientia non olet · About LEMON Manuals