SFI System: Inspection

WARNING: This page is about a different car, the 2005 Toyota Sienna. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT MASS AIR FLOW METER

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

Resistance:

TERMINAL AND RESISTANCE TEMPERATURE

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)

Fig 1: Resistance To Temperature Graph

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSY
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: Connecting Battery To Terminal 1 & 2
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NOTE: Confirm the valve moves freely and does not stick in any position.

HINT:

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

INSPECT ACCELERATOR PEDAL ROD ASSY

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

Resistance:

ACCELERATOR PEDAL ROD

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: Measuring Resistance Between Accelerator Pedal Rod

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

INSPECT THROTTLE BODY ASSY

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

Resistance:

TERMINAL AND RESISTANCE TEMPERATURE

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

Fig 4: Measuring Resistance Between Throttle Body

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

INSPECT E.F.I. ENGINE COOLANT TEMPERATURE SENSOR
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: While 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: Measuring Resistance Between Each Terminal Of Engine E.F.I. Coolant Temperature Sensor
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT KNOCK SENSOR
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

INSPECT EFI RELAY

Continuity inspection.
1. Using an ohmmeter, check for continuity between each terminal.

EFI RELAY CONDITION

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

Fig 7: Checking Continuity Between Each Terminal Of EFI Relay

INSPECT CIRCUIT OPENING RELAY

Continuity inspection.
1. Using an ohmmeter, check for continuity between each terminal.

CIRCUIT OPENING RELAY CONDITION

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

Fig 8: Checking Continuity Between Each Terminal Of Circuit Opening Relay