SFI System (2UZ-FE): Inspection

1. Apply battery voltage across terminals 3 (+B) and 4 (E2G).
2. Connect the positive (+) tester prove to terminal 5 (VG), and the negative (-) tester prove to terminal 4 (E2G).
3. Blow air into the MAF meter, and check if the voltage fluctuates.

1. Using an ohmmeter, measure the resistance between terminals 2 (THA) and 1 (E2).

   Resistance: 

   • 12.5 to 16.9 kΩ at -20°C (-4°F) 
   • 2.19 to 2.67 kΩ at 20°C (68°F) 
   • 0.50 to 0.68 kΩ at 60°C (140°F) 
   Fig 1: Inspecting Mass Air Flow Meter

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Standard: 

   CAMSHAFT TIMING OIL CONTROL VALVE ASSY
   
   

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

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

1. Apply battery voltage across the terminals, and 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. This may cause subtle pressure leaks to the advance side, and a DTC may be set.

   Fig 2: Checking Spool Valve Operates

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Motor resistance: 0.3 to 100 Ω at 20°C (68°F) 

Fig 3: Inspecting Throttle W/Motor Body Assy

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Standard: 

   KNOCK SENSOR
   
   

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

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

   Fig 4: Inspecting Knock Sensor

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Resistance: 

   • 2.32 to 2.59 k Ω at 20°C (68°F) 
   • 0.310 to 0.326 k Ω at 80°C (176°F) 
   NOTE: If inspecting the water temperature sensor in water, prevent water from flowing into the terminals. After inspection, wipe the water off the sensor.
   Fig 5: Inspecting Engine Coolant Temperature Sensor

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Standard: 

   CIRCUIT OPENING RELAY
   
   

   Tester Connection	Specified Condition
   3 - 5	10 k ohms or higher
   3 - 5	Below 1.0 ohms (Apply battery voltage to terminals 1 and 2)

   Fig 6: Inspecting Circuit Opening Relay

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   If the result is not as specified, replace the circuit opening relay.

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

   Standard: 

   EFI RELAY
   
   

   Tester Connection	Specified Condition
   3 - 5	10 k ohms or higher
   3 - 5	Below 1.0 ohms (Apply battery voltage to terminals 1 and 2)

   Fig 7: Inspecting EFI Relay

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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