SFI System (3MZ-FE): Inspection

1. Check the output voltage.
   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 Mass Air Flow (MAF) meter, and check that the voltage fluctuates.
2. Measure the resistance between terminals 4 (THA) and 5 (E2).

Standard: 

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

Fig 1: Mass Air Flow Meter Terminals Resistance Graph

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1. Measure the resistance between the terminals.
   1. Standard: 6.9 to 7.9 a at 20°C (68°F) 

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

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

If necessary, replace the OCV assy.

HINT:

If the valve cannot return properly because of foreign matter, a small pressure leak in the advanced direction may occur and a DTC will be output.

Fig 2: Measuring Resistance Between Camshaft Timing Oil Control Valve Assy Terminals

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1. Check the accelerator pedal position sensor (See DTC P0120 THROTTLE/PEDAL POSITION SENSOR/SWITCH "A" CIRCUIT, DTC P0122 THROTTLE/PEDAL POSITION SENSOR/SWITCH "A" CIRCUIT LOW INPUT, DTC P0123 THROTTLE/PEDAL POSITION SENSOR/SWITCH "A" CIRCUIT HIGH INPUT, DTC P0220 THROTTLE/PEDAL POSITION SENSOR/SWITCH "B" CIRCUIT, DTC P0222 THROTTLE/PEDAL POSITION SENSOR/SWITCH "B" CIRCUIT LOW INPUT, DTC P0223 THROTTLE/PEDAL POSITION SENSOR/SWITCH "B" CIRCUIT HIGH INPUT, DTC P2135 THROTTLE/PEDAL POSITION SENSOR/SWITCH "A'V'B" VOLTAGE CORRELATION ).

1. Check the throttle position sensor (See DTC P0120 THROTTLE/PEDAL POSITION SENSOR/SWITCH "A" CIRCUIT, DTC P0122 THROTTLE/PEDAL POSITION SENSOR/SWITCH "A" CIRCUIT LOW INPUT, DTC P0123 THROTTLE/PEDAL POSITION SENSOR/SWITCH "A" CIRCUIT HIGH INPUT, DTC P0220 THROTTLE/PEDAL POSITION SENSOR/SWITCH "B" CIRCUIT, DTC P0222 THROTTLE/PEDAL POSITION SENSOR/SWITCH "B" CIRCUIT LOW INPUT, DTC P0223 THROTTLE/PEDAL POSITION SENSOR/SWITCH "B" CIRCUIT HIGH INPUT, DTC P2135 THROTTLE/PEDAL POSITION SENSOR/SWITCH "A'V'B" VOLTAGE CORRELATION ).
2. Check the throttle control motor.
   1. Measure the resistance between terminals 2 (M+) and 1 (M-).
      1. Resistance: 0.3 to 100 Ω at 20°C (68°F). 

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

Fig 3: Identifying Throttle Body Assy Terminals

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1. Measure the resistance between each terminal.

Standard: 

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

Fig 4: Measuring Resistance Between Engine Coolant Temperature Sensor Terminals

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1. Measure the resistance between the terminals.
   1. Resistance: 120 to 280 kΩ at 20°C (68°F) 

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

Fig 5: Measuring Resistance Between Knock Sensor Terminals

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1. Remove the EFI relay from the engine room J/B.
2. Remove the A/F relay from the engine room R/B No. 2.
3. Measure the resistance of the relay.

Standard: 

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

Fig 6: Measuring Resistance Between EFI And A/F Relay Terminals

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1. Remove the circuit opening relay from the R/B sub-assy.
2. Measure the resistance of the relay.

Standard: 

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

Fig 7: Measuring Resistance Between Circuit Opening Relay Terminals

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