Control Circuit Inspection

■ Check waveform 

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

   Specification:  refer to Signal Waveform & Data 

   Fig 1: Checking Waveform Between 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 

   • Repair short to battery circuit between IDB and Low side line of the injector circuit and go to "Verification of Vehicle Repair " procedure.