It has a function where it measures air that is flown into the intake manifold and serves this signal to the ECM. The inputted signal is computes the intake air amount, which is further used to determine the ignition timing and suitable amount of fuel to the relevant load. The MAP sensor is divided into the sensor installed the intake manifold and the sensor installed in between the intercooler and throttle body. The reason for using 2 sensors is to determine the ignition timing and suitable amount of fuel when the change of negative pressure for the intake manifold at the time where there is sudden increase or decrease in speed in after and before the throttle body.
ECM sets DTC P0299 if the ECM detects that booster pressure of turbo charger is lower than threshold value.
Item
Detecting Condition
Possible Cause
DTC Strategy
Plausibility check
Inspect Air cleaner
Inspect intake air line
Inspect vacuum hose
Faulty RCV
Faulty Wastegate
Enable
Conditions
Case1
engine speed > 2016 ~ 3008 rpm
ambient pressurre > 600 hpa
Fuel tank level> 8.6 %
ECT Temp. > -14.45?
Pressure quotient(Manifold pressure/Ambient Pressure) > 1.2
Failure not detected for DTCs
Case2
Wastegate PWM < 20.31 %
mass air flow > 70 kg/h
ambient pressure > 600 hpa
Fuel tank level > 8.6 %
ECT Temp.> -14.45?
Threshold Value
measured pressure up throttle< 600 ~ 1700 hpa(charge air pressure too low)
pressure up throttle deviation > 100 hpa
pressure up throttle-ambient pressure < 40 ~151.41 hpa(basic charge air pressure too low)
Diagnostic Time
2.2 sec
Specification
Coil Resistance (?)
28.3 ~ 31.1 (68?)