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).
   Fig 1: Identifying Mass Air Flow Meter And Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   MASS AIR FLOW METER RESISTANCE SPECIFICATIONS
   
   

   Terminals	Resistance	Temperature
   THA - E2	13.6 to 18.4 kΩ	-20 °C (-4°F)
   THA - E2	2.21 to 2.69 kΩ	20°C (68°F)
   THA - E2	0.493 to 0.667 kΩ	60°C (140°F)

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) 

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.

Fig 2: Inspecting Camshaft Timing Oil Control Valve Assembly

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

HINT:

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

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

   Resistance: 

   ACCELERATOR PEDAL ROD ASSEMBLY RESISTANCE SPECIFICATIONS
   
   

   Terminal	Resistance
   3 (VPA2) - 5 (EP1)	5.0 kΩ or less
   6 (VPA1) - 2 (EP2)	5.0 kΩ or less
   4 (VCP1) - 5 (EP1)	2.25 to 4.75 kΩ
   1 (VCP2) - 2 (EP2)	2.25 to 4.75 kΩ

   Fig 3: Identifying Accelerator Pedal Rod Assembly Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Resistance: 

   THROTTLE BODY ASSEMBLY RESISTANCE SPECIFICATIONS
   
   

   Terminals	Resistance	Temperature
   2 (M+) - 1 (M-)	0.3 to 100 Ω	20°C (68°F)

   Fig 4: Identifying Throttle Body Assembly Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Resistance: 

   2.32 to 2.59 kΩ at Approx. 20°C (68°F) 

   0.310 to 0.326 kΩ at Approx. 80°C (126°F) 

   NOTE: If checking the engine coolant temperature sensor in water, be careful not to allow water to go into the terminals, and after checking, dry the sensor.
   Fig 5: Inspecting Engine Coolant Temperature Sensor

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Resistance: 120 to 280 kΩ at 20°C (68°F) 

HINT:

If the resistance is not specified, replace the sensor.

Fig 6: Inspecting Knock Sensor

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Continuity inspection.
   1. Using an ohmmeter, check for continuity between each terminal
   EFI RELAY CONTINUITY SPECIFICATIONS
   
   

   Between terminal	Specified condition
   1 - 2	Continuity
   3 - 5	No continuity
   3 - 5	Continuity (Voltage applied terminals 1 and 2)

   Fig 7: Identifying EFI Relay Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Continuity inspection.
   1. Using an ohmmeter, check for continuity between each terminal.
   CIRCUIT OPENING RELAY CONTINUITY SPECIFICATIONS
   
   

   Between terminal	Specified condition
   1 - 2	Continuity
   3 - 5	No continuity
   3 - 5	Continuity (Voltage applied terminals 1 and 2)

   Fig 8: Identifying Circuit Opening Relay Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002