Description Of Parameters: Intake

MASS AIR FLOW (G/S) 

The value indicates the actual mass of air that passes through the mass air flow sensor in the intake. The signal comes from the directly connected mass air flow meter (with integrated temperature sensor).

Measurement range 0 - 655 g/s.

INTAKE AIR TEMPERATURE (°C) 

The value indicates the actual temperature of the air that passes through the mass air flow sensor in the intake. The signal comes from the directly connected air temperature sensor (integrated in the mass air flow meter).

Measurement range: -40 - 130°C

Normal value: Same as outdoor temperature, eventually slightly higher depending on affects of the engine temperature.

SUPERCHARGER CLUTCH, REQUESTED POSITION (STATUS) 

The value indicates the actual requested position of the directly connected supercharger clutch, i.e. the position that determines whether the compressor is to be active and rotated.

Connected = the compressor is connected.

Disconnected = the compressor is not connected.

Normal value: Disconnected with hot engine at idle in neutral.

SUPERCHARGER CONTROL VALVE BYPASS (%) 

The value indicates the actual position of the directly connected supercharger control valve for bypass.

Measurement range 0-100%.

0% = the valve is closed, all air is routed into the compressor.

100% = the valve is open, no air is routed into the compressor.

Normal value: 100% with hot engine at idle in neutral.

HINT: In a trouble-free system the value should follow "Supercharger control valve bypass, requested position". 

SUPERCHARGER CONTROL VALVE BYPASS, REQUESTED POSITION (%) 

The value indicates the actual requested position of the supercharger control valve for bypass. The value performs the control signal that is sent to the damper motor in the valve.

Measurement range 0-100%.

0% = the valve is closed, all air is routed into the compressor.

100% = the valve is open, no air is routed into the compressor.

Normal value: 100% with hot engine at idle in neutral.

BOOST PRESSURE (AFTER COMPRESSOR) (PA) 

The value indicates the actual boost pressure after the compressor. The value is calculated by the signal from the directly connected boost pressure sensor after the compressor.

Measurement range: 12 - 296 kPa.

Normal value: With ignition on the pressure is the same as atmospheric pressure.

TURBOCHARGER (TC) CONTROL VALVE (%) 

The value indicates the actual requested opening of the directly connected turbo control valve.

Measurement range 0-100%.

0% = fully open valve.

100% = closed valve.

RELIEF VALVE (STATUS) 

The value indicates the actual requested position of the directly connected relief valve. The valve is controlled to the open position when there is greater pressure in the turbo compared with the requested boost pressure.

Open = the valve is open.

Closed = the valve is closed.

BOOST PRESSURE (AFTER TURBO) (PA) 

The value indicates the actual boost pressure after the turbo. The value is calculated by the signal from the directly connected boost pressure sensor after the turbo and charge air cooler (with integrated temperature sensor).

Measurement range: 20 - 300 kPa.

Normal value: With ignition on the pressure is the same as atmospheric pressure.

CHARGE AIR PRESSURE, SETPOINT VALUE (PA) 

The value shows the actual requested charge air pressure. The pressure regards absolute pressure.

Measurement range: 40 - 300 kPa.

Normal value: Depends on driving conditions, but at idle approx. atmospheric pressure. Maximum pressure approx. 280 kPa.

CHARGE-AIR TEMPERATURE (°C) 

The value indicates the actual air temperature after the turbo and the charge air cooler, ahead of the throttle. The signal comes from the directly connected Intake Air Temperature sensor (integrated in the boost pressure sensor).

Measurement range: -40 - 130°C.

HINT: The engine is considered to be cool when the engine has been switched off for at least 10 hours. The temperature can then be compared with the ambient temperature and the difference must not be greater than ±5°C. 

AIR PRESSURE, INTAKE MANIFOLD (PA) 

The value indicates the actual air pressure in the intake manifold, after the throttle. The signal comes from the directly connected air pressure sensor.

Measurement range: 12 - 292 kPa.

With ignition on the pressure is the same as atmospheric pressure.