SFI System: Inspection

1. Output voltage inspection.
   1. Apply battery voltage across terminals 1 (+B) and 2 (E2G).
   2. 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 output fluctuates.
2. Resistance inspection.

1. Using an ohmmeter, measure the resistance between terminals 4 (THA) and 5 (E2).

   Resistance: 

Fig 1: Resistance And Temperature Relating Table For Terminal THA-E2

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1. Resistance inspection.
   1. Using an ohmmeter, measure the resistance between the terminals.

      Resistance: 6.9 to 7.9 Ω at 20 °C (68 °F) 

   Fig 2: Identifying Temperature And Resistance Relating Graph And Mass Air Flow Meter Connector View

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2. Movement inspection.
   1. Connect the battery positive (+) lead to terminal 1 and negative (-) lead to terminal 2, and check the movement of the valve.

NOTE:

Confirm the valve moves freely and does not stick in any position.

HINT:

Foreign objects in the oil can cause subtle pressure leaks in the valve. The pressure leak will cause the cam to advance. This condition will usually set a DTC.

Fig 3: Inspecting Camshaft Timing Oil Control Valve Assembly Movement

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1. Check the throttle body.
   1. Check that the throttle valve shaft is not rickety.
   2. Check that all ports are not stopped up.
   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.

NOTE:

Do not touch the throttle stop screw.

Fig 4: Inspecting Throttle Body Assembly

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1. Resistance inspection.
   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

   3. Check the variation in resistance between terminals VTA and E2.

   Variation in resistance:

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

HINT: 

Fig 5: Throttle Valve Movement And Resistance Relating Table

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002