SFI System: Inspection

INSPECT MASS AIR FLOW METER
1. Check the output voltage.
  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 in to the MAF meter, and check that the voltage fluctuates.
2. Measure the resistance between terminals 4 (THA) and 5 (E2).
Standard:

Fig 1: Terminals 4 (THA) And 5 (E2) Resistance Chart
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

If the result is not as specified, replace the MAF meter.

Fig 2: Inspecting Mass Air Flow Meter
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSY
1. Using an ohmmeter, measure the resistance between the terminals.
  Standard: 6.9 to 7.9 Ω at 20°C (68°F)
2. Connect the battery's positive (+) lead to terminal 1 and negative (-) lead to terminal 2. Check the movement of the valve.
  
  Fig 3: Valve Movement Chart
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  If operation is not as specified, replace the valve.
  
  Fig 4: Inspecting Camshaft Timing Oil Control Valve Assy
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT ACCELERATOR PEDAL ROD ASSY
1. Measure the resistance between the terminals.
Standard:

Fig 5: Terminals Resistance Chart
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

Fig 6: Identifying Accelerator Pedal Rod Assy Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT THROTTLE BODY ASSY
1. Measure the resistance between the terminals.
Standard:

Fig 7: Terminals Resistance Chart
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

Fig 8: Identifying Throttle Body Assy Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT ENGINE COOLANT TEMPERATURE SENSOR
1. Measure the resistance between terminals 1 and 2.
Standard:

Fig 9: Coolant Temperature Sensor Terminals 1 And 2 Resistance Chart
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

NOTE: If checking the ECT sensor in the water, keep the terminals dry. After the check, wipe the sensor dry.

Fig 10: Inspecting Engine Coolant Temperature Sensor
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT KNOCK SENSOR
1. Using an ohmmeter, measure the resistance between the terminals.
  Standard: 120 to 280 kΩ at 20°C (68°F)
  
  If the result is not as specified, replace the sensor.
  
  Fig 11: Measuring Resistance Between Knock Sensor Terminals
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT RELAY (Marking: EFI, C/OPN)
1. Remove the EFI and C/OPN relays from the engine room R/B.
2. Measure the resistance of the relay.
Standard:

Fig 12: Relay Resistance Chart
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

Fig 13: Inspecting Relay (Marking: EFI, C/OPN)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT RELAY (Marking: F/PMP)
1. Remove the F/PMP relay from the engine room R/B.
2. Measure the resistance of the F/PMP relay.
Standard:

Fig 14: F/PMP Relay Resistance Chart
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

Fig 15: Inspecting Relay (Marking: F/PMP)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002