Injector Checking

USING HI-SCAN

HI-SCAN FUNCTIONS REFERENCE

Check item	Data display	Check conditions	Check content	Test specification
Injector	Drive time (at starting)	Engine: Cranking	0°C(32°F)	Approx. 17 ms
			20°C(68°F)	Approx. 35 ms
			80°C(176°F)	Approx. 8.5 ms

NOTE: Drive time indicates the injector activation time when the supply voltage is 11V and the cranking speed is less than 250 RPM.

TEST SPECIFICATION

Check item	Data display	Check conditions	Engine state	Test specification
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:

When engine coolant temperature is lower than CPC (32°F), the PCM fires all four 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.

INJECTOR SPECIFICATION

Check item	Drive content	Check condition	Normal state
Injector Actuator test	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.
	No.2 injector shut off
	No.3 injector shut off
	No.4 injector shut off
	No.5 injector shut off
	No.6 injector shut off

USING STETHOSCOPE AND VOLTMETER

Operation Sound Check

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.
NOTE: Ensure that the sound from an adjacent injector is not being transmitted along the delivery pipe to an inoperative injector.

Fig 1: Identifying Stethoscope
Courtesy of HYUNDAI MOTOR CO.
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 PCM.

Fig 2: Checking Injector Operation With Your Finger
Courtesy of HYUNDAI MOTOR CO.

Resistance Measurement Between Terminals
Disconnect the connector at the injector.
Measure the resistance between terminals.
Standard value: 13 ~ 16Ω [at 20°C(68°F)]
Re-connect the connector to the injector.

Fig 3: Measuring Resistance Between Terminals

Courtesy of HYUNDAI MOTOR CO.