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SFI System (1ZZ-FE): 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)
      G02612187Courtesy 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
    G02612188Courtesy 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
      G02612189Courtesy 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 it. 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
      G02612190Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. INSPECT THROTTLE BODY 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 (M-) -2 (M+) 0.3 to 100Ω at 20°C (68° F)
      3 (E2) -5 (VC) 2.0 to 4.0 kΩ at 20°C (68°F)

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

    Fig 5: Measuring Resistance Between Terminals
    G02612191Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. INSPECT ACCELERATOR PEDAL 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(EP1)-6(VCP1) 1.5 to 6.0 kΩ
      1(EP2) -4 (VCP2) 1.5 to 6.0 kΩ

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

    Fig 6: Measuring Resistance Between Terminals
    G02612192Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  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 0.326kΩ 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
    G02612193Courtesy 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 280 kΩ at 20°C (68°F)

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

    Fig 8: Measuring Resistance Between Terminals
    G02612194Courtesy 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 10kΩ or higher
      3-5 Below 1 Ω (Apply battery voltage to terminal 1 and 2)

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

    Fig 9: Measuring Resistance Between Terminals
    G02612195Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  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 10kΩ 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
    G02612196Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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