SFI System (3MZ-FE): Inspection

INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSY

Inspect the resistance.

Using an ohmmeter, measure the resistance between the terminals.

Standard:

TERMINALS CONNECTION CONDITION

Tester Connection	Specified Condition
1 (-) - 2 (+)	6.9 to 7.9 Ω at 20°C (68°F)

Fig 1: Measuring Resistance Between Terminal

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

Check the operation.

Connect the positive (+) lead from the battery to terminal 2 (+) and negative (-) lead to terminal 1 (-), then check the movement of the spool valve.

NOTE: Confirm that the spool valve moves freely and does not get stuck in any position.

HINT:

Bad returning of the spool valve resulted from catching foreign objects causes subtle pressure leak to the advanced direction. In that case, DTC can be detected.

Fig 2: Checking Spool Valve Operation

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

INSPECT MASS AIR FLOW METER
1. Check the operation.
1. Apply battery voltage across terminals 1 (+B) and 2 (E2G).
2. Using voltmeter, connect the positive (+) tester probe to terminal 3 (VC), and negative (-) tester probe to terminal 2 (E2G).
3. Blow air into the mass air flow sensor, then check that the voltage fluctuates.
  If the operation is not as specified, replace the mass air flow sensor.
Fig 3: Measuring Voltage Fluctuation
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Inspect the resistance.

Using an ohmmeter, measure the resistance between the terminals.

Standard:

TERMINALS CONNECTION CONDITION

Tester Connection	Specified Condition
4 (THA) - 5 (E2)	13.6 to 18.4 kΩ at -20°C (-4°F)
4 (THA) - 5 (E2)	2.21 to 2.69 kΩ at 20°C (68°F)
4 (THA) - 5 (E2)	0.493 to 0.667 kΩ at 60°C (140°F)

If the resistance is not as specified, replace the mass air flow sensor.

Fig 4: Mass Air Flow Meter Temperature Resistance Graph

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

INSPECT ENGINE COOLANT TEMPERATURE SENSOR

Inspect the resistance.

Using an ohmmeter, measure the resistance between the terminals. Standard:

TERMINALS CONNECTION CONDITION

Tester Connection	Specified Condition
1 (E2) - 2 (THW)	2.32 to 2.59 kΩ at 20°C (68°F)
1 (E2) - 2 (THW)	0.310 to 0.326 kΩ at 80°C (176°F)

NOTE: When checking the engine coolant temperature sensor in water, be careful not to allow water to intrude into the terminals. Then dry the engine coolant temperature sensor after checking.

If the resistance is not as specified, replace the engine coolant temperature sensor.

Fig 5: Engine Coolant Temperature Sensor Temperature-Resistance Graph

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

INSPECT THROTTLE BODY ASSY

Inspect the resistance.

Using an ohmmeter, measure the resistance between the terminals.

Standard:

TERMINALS CONNECTION CONDITION

Tester Connection	Specified Condition
1 (M-) - 2 (M+)	0.3 to 100 Ω at 20°C (68°F)
3 (E2) - 5 (VC)	1.2 to 3.2 kΩ at 20°C (68°F)

If the resistance is not as specified, replace the throttle body.

Fig 6: Measuring Resistance Between Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

INSPECT KNOCK SENSOR

Inspect the resistance.

Using an ohmmeter, measure the resistance between the terminals.

Standard:

TERMINALS CONNECTION CONDITION

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

If the resistance is not specified, replace the knock sensor.

Fig 7: Measuring Resistance Between Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

INSPECT ACCELERATOR PEDAL ASSY (NORMAL PEDAL)

Inspect the resistance.

Using an ohmmeter, measure the resistance between the terminals.

Standard:

TERMINALS CONNECTION CONDITION

Tester Connection	Specified Condition
2 (VPA2) -3 (EP1)	5.0 kΩ or less
1 (EP2) - 5 (VPA1)	5.0 kΩ or less
3 (EP1) - 6 (VCP1)	2.25 to 4.75 kΩ
1 (EP2) - 4 (VCP2)	2.25 to 4.75 kΩ

If the resistance is not specified, replace the accelerator pedal.

Fig 8: Measuring Resistance Between Terminals

INSPECT ACCELERATOR & BRAKE PEDAL ASSY (POWER PEDAL)

Inspect the resistance.

Using an ohmmeter, measure the resistance between the terminals.

Standard:

TERMINALS CONNECTION CONDITION

Tester Connection	Specified Condition
3 (EP1) -5 (VPA1)	5.0 kΩ or less
1 (EP2) - 2 (VPA2)	5.0 kΩ or less
3 (EP1) - 6 (VCP1)	2.25 to 4.75 kΩ
1 (EP2) - 4 (VCP2)	2.25 to 4.75 kΩ

If the resistance is not specified, replace the accelerator & brake pedal.

Fig 9: Measuring Resistance Between Terminals

INSPECT MAIN RELAY

Inspect the resistance.

Using an ohmmeter, measure the resistance between the terminals.

Standard:

TERMINALS CONNECTION CONDITION

Tester Connection	Specified Condition
3 - 5	10 kΩ or higher
3 - 5	Below 1° (Apply battery voltage to terminals 1 and 2

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

Fig 10: Measuring Resistance Between Terminals

INSPECT CIRCUIT OPENING RELAY

Inspect the resistance.

Using an ohmmeter, measure the resistance between the terminals.

Standard:

TERMINALS CONNECTION CONDITION

Tester Connection	Specified Condition
3 - 5	10 kΩ or higher
3 - 5	Below 1° (Apply battery voltage to terminals 1 and 2

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

Fig 11: Measuring Resistance Between Terminals