Control Circuit Inspection

■ Check waveform 

1. IG "OFF".
2. Connect the probe to High/Low side of the injector circuit and select the oscilloscope in the menu
3. ENG "ON".
4. Check the waveform between High/Low side terminal of the injector circuit and chassis ground.

   Specification:  refer to SIGNAL WAVEFORM & DATA 

   Fig 1: Checking Waveform Between High/Low Side Terminal Of Injector Circuit And Chassis Ground

   Courtesy of HYUNDAI MOTOR AMERICA
5. Is the measured waveform within specification?

   YES 

   • Go to "COMPONENT INSPECTION " as follows.

   NO 

   • In case of abnormal waveform presented in High side line, repair open circuit between IDB and High side line of the injector circuit and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
   • In case of abnormal waveform presented in Low side line, repair open circuit between IDB and Low side line of the injector circuit and go to "VERIFICATION OF VEHICLE REPAIR " procedure.