Hyundai GENESIS COUPE BK 2010 Manual page 677

Fig.1) Normal waveform of IATS at 43°C (109°F)
Fig.2) Normal data of IATS & ECTS & EOTS at ig on
Fig.3) Normal data of IATS & ECTS & EOTS after warming up.
Fig.4) Abnormal data of IATS at open condition.
The output signals of IATS & ECTS change smoothly without any rapid changes. Those have almost same
characteristic signal during the early period after start. It means that the temperatures of intake air and engine coolant
are depended on the temperature of atmosphere. Meanwhile, during the warming up, the output signal of ECTS is
going up increasingly. but, the output signal of IATS changes a little bit. even it may not change almost. It means that
the heat of engine does not affect on the temperature of intake air.
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.