Hyundai GENESIS COUPE BK 2010 Manual page 623

4. Is parameter displayed "History(Not Present) fault" ?
▶ System performing to specification at this time. Clear the DTC.
▶ Go to the applicable troubleshooting procedure.
Fuel System > Engine Control System > P0103 Mass or Volume Air Flow \'A\' Circuit High
Input
Component Location
General Description
The Mass Air Flow Sensor (MAFS) is located between the air cleaner assembly and the throttle body. The MAFS uses
a hot film type sensing element to measure the mass of intake air entering the engine. This hot film type air flow
sensor consists of a hot film sensor, housing and metering ducts. Mass air flow rate is measured by detection of heat
transfer from a hot film probe. The change in air flow rate causes change in the amount of heat being transferred from
the hot film probe surface to the air. A large amount of intake air represents acceleration or high load conditions while a
small amount of intake air represents deceleration or idle. The mass of intake air should increase at acceleration and
be stable during constant engine speed. The ECM uses this information to determine the injection duration and ignition
timing for the desired air/fuel ratio.
DTC Description
If ECM detects that frequency signal of MAFS is higher thatn 11900 Hz for more than 3.9 second during 7.5 second
dignostic test while enable condition is met, ECM determines that a fault exists and a DTC is stored. MIL(Malfunction
Indication Lamp) turns on when the malfunction lasts till consecutive 2 driving cycle.
DTC Detecting Condition
Item
DTC Strategy
Enable Conditions
Threshold value
Detecting Condition
• Compares the airmeter input frequency to a high limit
• Engine Speed ≥ 500 rpm
• Engine Running Time ≥ 5 second
• Ignition Voltage ≥ 11V
• MAF frequency signal > 11900Hz
Possible Cause
• Noise
• MAFS
• ECM