Hyundai GENESIS COUPE BK 2010 Manual page 619

▶ Go to "Signal Circuit Inspection" Procedure.
▶ Check fuse between MAFS and main relay is open or not installed.
Signal Circuit Inspection
■ Check voltage
1. IG "OFF" and Disconnect MAFS connector.
2. IG "ON".
3. Measure voltage between signal terminal of MAFS harness connector and chassis ground.
Specification : Approx. 5V
4. Is the measured voltage within specification ?
▶ Go to "Ground circuit inspection" procedure.
▶ If the measured voltage is "0", go to "Check open in harness" as follows. If the measured
voltage is over "5V", go to "Check short to battery in harness" as follows.
■ Check short to battery in harness
1. IG "OFF" and disconnect MAFS and ECM connector.
2. Measure resistance between signal and power terminals of MAFS harness connector.
3. Measure resistance between signal terminal of MAFS harness connector and signal terminal of IATS harness
connector.
Specification : Infinite
4. Is the measured resistance within specification ?
▶ Go to "Check short to ground in harness" as follows.
▶ Repair short to battery in harness and go to "Verification of Vehicle Repair" procedure.
■ Check short to ground in harness
1. IG "OFF" and disconnect MAFS and ECM connector.
2. Measure resistance between signal terminal of MAFS harness connector and chassis ground.
Specification : Infinite
3. Is the measured resistance within specification ?
▶ Go to "Check open in harness" as follows.
▶ Repair short to ground in harness and go to "Verification of Vehicle Repair" procedure.
■ Check open in harness
1. IG "OFF" and disconnect MAFS and ECM connector.
2. Measure resistance between signal terminal of MAFS harness connector and MAFS signal terminal of ECM harness