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SFI System (1ZZ-FE (Ff)): Inspection

  1. INSPECT INTAKE AIR FLOW METER SUB-ASSY 
    1. Check the operation.
      1. Apply battery voltage across terminals 1 (+B) and 2 (E2G).
      2. Using a voltmeter, connect the positive (+) tester prove to terminal 3 (VG) and the negative (-) tester prove to terminal 2 (E2G).
        3. Fig 1: Checking Battery Voltage Using Voltmeter
        G02677998Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      3. Blow air into the mass air flow meter, then check that the voltage fluctuates.

        If the voltage does not fluctuate, replace the mass air flow meter.

    2. Check the resistance.
      1. Using an ohmmeter, measure the resistance between the terminals.
        Fig 2: Measuring Resistance Terminals Using Ohmmeter
        G02677999Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        Standard: 

        BATTERY VOLTAGE SPECIFICATION

        Tester Connection Specified Condition
        4(THA)-5(E2) 13.6 to 18.4 kΩ at -20°C (-4° F)
        4(THA)-5(E2) 2.21 to 2.69 kΩ at 20°C (68°F)
        4(THA)-5(E2) 0.493 to 0.687 kΩ at 60°C (140°F)

    If the result is not as specified, replace the mass air flow meter.

  2. INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSY 
    1. Check the resistance.
      1. Using an ohmmeter, measure the resistance between the terminals.
        Fig 3: Measuring Resistance Between Terminals Using Ohmmeter
        G02678000Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        Standard: 

        RESISTANCE SPECIFICATION (1 OF 7)

        Tester Connection Specified Condition
        1 (+B) - 2 (GND) 6.9 to 7.9 kΩ at 20°C (68°F)

      If the result is not as specified, replace the camshaft timing oil control valve.

    2. Check the operation.
      1. Apply battery voltage across the terminals, and check that the spool valve operates.
        Fig 4: Checking Battery Voltage
        G02678001Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    NOTE: Check that the spool valve Is not stuck.

    HINT:

    The spool valve may not return if foreign objects are caught in it. This may cause subtle pressure leaks to the advance side, and a DTC may be set.

  3. INSPECT THROTTLE BODY ASSY 
    1. Check the resistance.
      1. Using an ohmmeter, measure the resistance between the terminals.

        Standard: 

        RESISTANCE SPECIFICATION (2 OF 7)

        Tester Connection Specified Condition
        1(M-)-2(M+) 0.3 to 100 Ω at 20°C(68°F)
        3(E2)-5(VC) 2.0 to 4.0 kΩ at 20°C(68°F)
        Fig 5: Inspecting Throttle Body Terminals
        G02678002Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    If the result is not as specified, replace the throttle body.

  4. INSPECT ACCELERATOR PEDAL ASSY 
    1. Check the resistance.
      1. Using an ohmmeter, measure the resistance between the terminals.

        Standard: 

        RESISTANCE SPECIFICATION (3 OF 7)

        Tester Connection Specified Condition
        3(EP1)-6(VCP1) 1.5 to 6.0 kΩ
        1(EP2)-4(VCP2) 1.5 to 6.0 kΩ
        Fig 6: Inspecting Accelerator Pedal
        G02678003Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    If the result is not as specified, replace the accelerator pedal.

  5. INSPECT E.F.I. ENGINE COOLANT TEMPERATURE SENSOR 
    1. Check the resistance.
      1. Using an ohmmeter, measure the resistance between the terminals.

        Standard: 

        RESISTANCE SPECIFICATION (4 OF 7)

        Tester Connection Specified Condition
        1 (E2)-2(THW) 2.32 to 2.59 kΩ at 20°C (68°F)
        1(E2)-2(THW) 0.310 to 0.326 kΩ at 80°C(176°F)
        Fig 7: Checking E.F.I. Engine Coolant Temperature Sensor
        G02678004Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    NOTE: If checking the engine coolant temperature sensor in water, be careful not to allow water to intrude into the terminals. After checking, wipe up water on the engine coolant temperature sensor.

    If the result is not as specified, replace the engine coolant temperature sensor.

  6. INSPECT KNOCK SENSOR 
    1. Check the resistance.
      1. Using an ohmmeter, measure the resistance between the terminals.

        Standard: 

        RESISTANCE SPECIFICATION (5 OF 7)

        Tester Connection Specified Condition
        1 (Ground) - 2 (Output) 120 to 280 kΩ at 20°C (68°F)
        Fig 8: Checking Resistance Using Ohmmeter
        G02678005Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    If the result is not as specified, replace the knock sensor.

  7. INSPECT E.F.I. CIRCUIT OPENING RELAY ASSY 
    1. Inspect the resistance.
      1. Using an ohmmeter, measure the resistance between the terminals.

        Standard: 

        RESISTANCE SPECIFICATION (6 OF 7)

        Tester Connection Specified Condition
        3-5 10k Ω or higher
        3-5 Below 1 Ω (Apply battery voltage to terminal 1 and 2)
        Fig 9: Inspecting E.F.I. Circuit Opening Relay Assy
        G02678006Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    If the result is not as specified, replace the E.F.I. circuit opening relay assy.

  8. INSPECT E.F.I ECU RELAY 
    1. Check the resistance.
      1. Using an ohmmeter, measure the resistance between the terminals.

        Standard: 

        RESISTANCE SPECIFICATION (7 OF 7)

        Tester Connection Specified Condition
        3-5 10k Ω or higher
        3-5 Below 1 Ω (Apply battery voltage to terminal 1 and 2)
        Fig 10: Checking E.F.I ECU Relay
        G02678007Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    If the result is not as specified, replace the E.F.I ECU relay.

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