SFI System: Inspection

Intake air flow meter sub-assembly.
1. Output voltage inspection.
  1. Apply battery voltage across terminals 1 (+B) and 2 (E2G).
  2. Using a voltmeter, connect the positive (+) tester probe to terminal VG, and negative (-) tester probe to terminal E2G.
  3. Blow air into the MAF meter, and check that the voltage fluctuates.
2. Resistance inspection.
  1. Using an ohmmeter, measure the resistance between terminals 4 (THA) and 5 (E2).
    1. Resistance:
      1. -20°C (-4°F) 13.6-18.4 K-ohms
      2. 20°C (68°F) 2.21-2.69 K-ohms
      3. 60°C (140°F) 0.493-0.667 K-ohm
  Fig 1: Displaying Intake Air Flow Meter Sub-Assembly
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Camshaft timing oil control valve assembly.
1. Resistance inspection.
  1. Using an ohmmeter, measure the resistance between the terminals.
  Resistance: 6.9-7.9 ohms at 20°C (68°F)
2. Movement inspection.
  1. Connect the positive (+) lead from the battery to terminal 1 and negative (-) lead to terminal 2, and check the movement of the valve.
  NOTE: Confirm the valve does not adhere.
  
  NOTE: Bad returning of the valve by entrance of foreign objects causes subtle pressure leak to the advanced direction. Then, DTC can be detected.
  
  Fig 2: Displaying Movement Inspection
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Accelerator pedal assembly.
1. Resistance inspection
  1. Using an ohmmeter, measure the resistance between terminals.
  Resistance: For specification, see Fig 3.
  
  Fig 3: Displaying Accelerator Pedal Resistance
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 4: Identifying Resistance Test Terminals
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Throttle body assembly.
1. Resistance inspection
  1. Using an ohmmeter, measure the resistance between terminals.
    Resistance: 0.3-100 ohms at 20°C (68°F)
Fig 5: Displaying Throttle Body Assembly
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
E.F.I. throttle position sensor.
1. Resistance inspection.
  1. Using an ohmmeter, measure the resistance between terminals 1 (VC) and 4 (E2).
    Resistance: 1.2-3.2 K-ohms
  Fig 6: Displaying E.F.I. Throttle Body Assembly
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
E.F.I. engine coolant temperature sensor.
1. Resistance inspection.
  1. Using an ohmmeter, measure the resistance between each terminal.
    1. Resistance:
      1. Approx. 20°C (68°F) 2.32-2.59 K-ohms
      2. Approx. 80°C (176°F) 0.310-0.326 K-ohms
NOTE: In case of checking the water temperature sensor in the water, be careful not to allow water to go into the terminals, and after checking, wipe out the sensor.

Fig 7: Displaying Engine Coolant Temperature Sensor
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Knock control sensor.
1. Continuity inspection.
  1. Using an ohmmeter, check that no continuity exists between the terminal and body.
Fig 8: Displaying Knock Control Sensor
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
E.F.I. circuit opening relay assembly E.F.I ECU relay.
1. Continuity inspection.
  1. Using an ohmmeter, check that continuity exists between each terminal.
    1. Specified condition:
      1. Between terminals 1 and 2 - Continuity
      2. Between terminals 3 and 5 - No continuity
  2. Using an ohmmeter, check that continuity exists between terminals 3 and 5 when the battery voltage is applied across terminals 1 and 2.
  Fig 9: Displaying Circuit Opening Relay & ECU Relay
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002