Using Stethoscope And Voltmeter

WARNING: This page is about a different car, the 2004 Hyundai Santa Fe and 2003 Hyundai Santa Fe. However, it is still accessible from the selected car via links, so may be relevant.

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: Checking Injector With 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 With 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: Checking Injector With Voltmeter
Courtesy of HYUNDAI MOTOR CO.