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SFI System (3MZ-FE): Inspection

INSPECT MASS AIR FLOW METER
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: Terminals 4 (THA) And 5 (E2) Resistance Specifications
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    
    Fig 2: Identifying Mass Air Flow Meter Connector Terminals And Resistance 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.
    NOTE: Confirm the valve moves freely and does not stick in any position.
    
    HINT:
    
    Bad returning of the valve by catching foreign objects causes subtle pressure leak. The subtle pressure leak will cause the cam to advance, and this condition will set a DTC.
    
    Fig 3: Checking Camshaft Timing Oil Control Valve Movement
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

INSPECT ACCELERATOR PEDAL ROD ASSY

Resistance inspection

Using an ohmmeter, measure the resistance between the terminals.

Resistance:

ACCELERATOR PEDAL ROD ASSY CONNECTOR TERMINALS RESISTANCE SPECIFICATIONS

Symbols (Terminal No.)	Resistance
VPA2 (3) - EP1 (5)	5.0 kΩ or less
VPA1 (6) - EP2 (2)	5.0 kΩ or less
VCP1 (4) - EP1 (5)	2.25 to 4.75 kΩ
VCP2 (1) - EP2 (2)	2.25 to 4.75 kΩ

Fig 4: Identifying Accelerator Pedal Rod Assy Connector Terminals

G03010597

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

INSPECT THROTTLE BODY ASSY

Resistance inspection

Using an ohmmeter, measure the resistance between terminals.

Resistance:

THROTTLE BODY ASSY CONNECTOR TERMINALS RESISTANCE SPECIFICATIONS

Symbols (Terminal No.)	Resistance	Temperature
M+ (2) - M- (1)	0.3 to 100 Ω	20°C (68°F)
VC (5) - E2 (3)	1.2 to 3.2 kΩ	20°C (68°F)

Fig 5: Identifying Throttle Body Assy Connector Terminals

G03010598

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 (176°F)
    
    NOTE: In case of checking the water temperature sensor in the water, be careful not to allow water to go into the terminals, and after checking, dry the sensor.
    
    Fig 6: Inspecting E.F.I. Engine 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 7: Measuring Resistance Between Terminals Of Knock Sensor
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

INSPECT EFI RELAY

Continuity inspection.

Using an ohmmeter, check for continuity between the terminals.

Specified condition:

EFI RELAY CONTINUITY CONDITIONS

Terminals	Specified condition
1 - 2	Continuity
3 - 5	No continuity
3 - 5	Continuity (Apply battery voltage terminals 1 and 2)

Fig 8: Inspecting EFI Relay

G03010601

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

INSPECT CIRCUIT OPENING RELAY

Continuity inspection.

Using an ohmmeter, check for continuity between the terminals.

Specified condition:

CIRCUIT OPENING RELAY CONTINUITY CONDITIONS

Terminals	Specified condition
1 - 2	Continuity
3 - 5	No continuity
3 - 5	Continuity (Apply battery voltage terminals 1 and 2)

Fig 9: Inspecting Circuit Opening Relay

G03010602

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002