Hyundai GENESIS COUPE BK 2010 Manual page 931

Fig.2) Normal data of Injector at idle.
Fig.3) Abnormal data of Injector when cylinder 2 injector has an open circuit
When the ECM energizes the injector by grounding control circuit, the circuit voltage should be low (theoretically 0V)
and the fuel is injected. When the ECM de-energizes the injector by opening control circuit, the fuel injector is closed
and circuit voltage should be peak at a moment.
Monitor GDS Data
1. Connect GDS to Data Link Connector(DLC).
2. IG "ON".
3. Select "DTC" button, and then Press "DTC Status" to check DTC's information from the DTCs menu.
4. Read "DTC Status" parameter.
5. Is parameter displayed "Present fault" ?
▶ Go to "Terminal and Connector inspection" procedure.
▶ Fault is intermittent caused by poor contact in the sensor's and/or ECM's connector or was
repaired and ECM memory was not cleared. Thoroughly check connectors for looseness, poor
connection, ending, corrosion, contamination, deterioration, or damage. Repair or replace as
necessary and go to "Verification of Vehicle Repair" procedure.
Terminal and Connector Inspection
1. Many malfunctions in the electrical system are caused by poor harness and terminals. Faults can also be caused by
interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or
damage.
3. Has a problem been found ?
▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure.
▶ Go to "Power Circuit Inspection" procedure.
Power Circuit Inspection
■ Check voltage
1. IG "OFF" and disconnect injector connector.
2. IG "ON".