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Injector Inspection

USING HI-SCAN (PRO)

CHECK ITEM CONDITION CHART

Check Item	Data display	Check conditions	Check content [°C (°F) ]	Test specification (ms)
Injector	Drive time (at staring)	Engine: Cranking	0 (32)	Approx. 17
			20 (68)	Approx. 35
			80 (176)	Approx. 8.5
Injector	Drive time	Engine coolant temperature: 80 to 95°C (176 to 205°F) Lamps, electric cooling fan, accessory modules: All OFF Transaxle: Neutral (P range for vehicle with A/T) Steering wheel: Neutral	Idle RPM	2.2~2.9 ms
			2,000 RPM	1.8~2.6 ms
			Rapid racing	Increasing

NOTE:

Drive time indicates the injector activation time when the supply voltage is 11V and the cranking speed is less than 250 RPM.
When engine coolant temperature is lower than 0°C (32°F) , the ECM fires all six cylinders simultaneously.
When the vehicle is new (within initial operation of about 500 km [300 miles]) , the injector drive time may be about 10% longer.

CHECK ITEM CONDITION CHART

Check Item	Item No.	Drive content	Check condition	Normal state
Injector Actuator test	01	No. 1 injector shut off	Engine: Idling after warm-up (Shut off the injectors in sequence during and after engine warm-up; check the idle condition)	Idle should become unstable as injector shuts off.
	02	No. 2 injector shut off
	03	No. 3 injector shut off
	04	No. 4 injector shut off
	05	No. 5 injector shut off
	06	No. 6 injector shut off

USING STETHOSCOPE AND VOLTMETER
1. OPERATION SOUND CHECK
  1. Using a stethoscope, check the injectors for a clicking sound at idle. Check that the sound is produced at shorter intervals as the engine speed increases.
    CAUTION: Ensure that the sound from an adjacent injector is not being transmitted along the delivery pipe to an inoperative injector.
    
    Fig 1: Checking Injectors For Clicking Sound At Idle
    Courtesy of HYUNDAI MOTOR CO.
  2. If a stethoscope is not available, check the injector operation with your finger. If no vibration is felt, check the wiring connector, injector or injection signal from the ECM.
    
    Fig 2: Checking Injector Operation With Finger
    Courtesy of HYUNDAI MOTOR CO.
2. RESISTANCE MEASUREMENT BETWEEN TERMINALS
  1. Disconnect the connector at the injector.
  2. Measure the resistance between terminals.
    Standard value: 13 - 16 Ω [at 20°C (68°F)]
  3. Re-connect the connector to the injector.
  Fig 3: Measuring Resistance Between Terminals
  Courtesy of HYUNDAI MOTOR CO.