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SFI System (2ZZ-GE): 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. 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.

      Fig 1: Connecting Positive (+) Tester Prove To Terminal 3 (VG) And Negative (-) Tester Prove To Terminal 2 (E2G)
      G02612220Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Check the resistance.
      1. Using an ohmmeter, measure the resistance between the terminals.

      Standard: 

      TESTER CONNECTION AND SPECIFIED CONDITION 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 0.667 kΩ at 60°C (140°F)

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

    Fig 2: Measuring Resistance Between Terminals
    G02612221Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSY 
    1. Check the resistance.
      1. Using an ohmmeter, measure the resistance between the terminals.

      Standard: 

      TESTER CONNECTION AND SPECIFIED CONDITION SPECIFICATION

      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.

      Fig 3: Measuring Resistance Between Terminals
      G02612222Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Check the operation.
      1. Apply battery voltage across the terminals, then check that the spool valve operates.
    NOTE: Check that the spool valve is not stuck.

    HINT:

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

    Fig 4: Applying Battery Voltage Across Terminals, Then Checking Spool Valve Operates
    G02612223Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. INSPECT THROTTLE BODY ASSY 
    1. Check the throttle body.
      1. Check that the throttle valve shaft is not rickety.
      2. Check that all ports are not clogged.
      3. Check that the throttle valve opens and closes smoothly.
      4. Check that there is no clearance between the throttle stop screw and throttle lever at the throttle valve closed position.
    Fig 5: Checking That There Is No Clearance Between The Throttle Stop Screw And Throttle Lever
    G02612224Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    NOTE: Do not touch the throttle stop screw.
  4. INSPECT E.F.I. THROTTLE POSITION SENSOR 
    1. Check the resistance.
      1. Disconnect the throttle position sensor connector.
      2. Using an ohmmeter, measure the resistance between terminals VC and E2.

        Resistance: 2.5 to 6.0 kΩ 

        Fig 6: Measuring Resistance Between Terminals VC And E2
        G02612225Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      3. Check the resistance variation between terminals VTA and E2.

      Variation of resistance: 

      The resistance value increases in proportion to the throttle lever opening value. 

    HINT:

    THROTTLE VALVE MOVEMENT AND RESISTANCE SPECIFICATION

    Throttle Valve Movement Resistance
    Fully close 0.2 to 5.7kΩ
    Fully open 2.0 to 10.2 kΩ
  5. INSPECT E.F.I. ENGINE COOLANT TEMPERATURE SENSOR 
    1. Check the resistance.
      1. Using an ohmmeter, measure the resistance between the terminals.

      Standard: 

      TESTER CONNECTION AND SPECIFIED CONDITION SPECIFICATION

      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)
    NOTE: If checking the engine coolant temperature sensor in water, be careful not to allow water to intrude into the terminals. After checking, wipe water off the engine coolant temperature sensor.

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

    Fig 7: Measuring Resistance Between Terminals
    G02612226Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  6. INSPECT KNOCK SENSOR 
    1. Check the resistance.
      1. Using an ohmmeter, measure the resistance between the terminals.

      Standard: 

      TESTER CONNECTION AND SPECIFIED CONDITION SPECIFICATION

      Tester Connection Specified Condition
      1 (Ground) -2 (Output) 120 to 280kΩ at 20°C (68°F)

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

    Fig 8: Measuring Resistance Between Terminals
    G02612227Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  7. INSPECT E.F.I. CIRCUIT OPENING RELAY ASSY 
    1. Check the resistance.
      1. Using an ohmmeter, measure the resistance between the terminals.

      Standard: 

      TESTER CONNECTION AND SPECIFIED CONDITION SPECIFICATION

      Tester Connection Specified Condition
      3-5 10 kΩ or higher
      3-5 Below 1Ω (Apply battery voltage to terminal 1 and 2)
    Fig 9: Measuring Resistance Between Terminals
    G02612228Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    If the result is not 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: 

      TESTER CONNECTION AND SPECIFIED CONDITION SPECIFICATION

      Tester Connection Specified Condition
      3-5 10 kΩ or higher
      3-5 Below 1Ω (Apply battery voltage to terminal 1 and 2)

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

    Fig 10: Measuring Resistance Between Terminals
    G02612229Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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