Description of Parameters

Description of parameters

Hint: The engine cylinders are counted starting from the cylinder furthest from the flywheel (right-hand side of the vehicle in the direction of travel)
Bank 1: cylinder 1-3.
Bank 2: cylinder 4-6.

Hint: Not all the parameters described need to be implemented in the control module. This varies between different systems and markets.

Parameters, value

ECU power supply (V)
Measurement range: 0 - 20 V.
The normal value is 13-14.5 V when the generator (GEN) is charging.
The value indicates the voltage at the engine control module (ECM).

External temperature (°C)
Measurement range: -40 to +120 °C.
The engine control module (ECM) derives the temperature from the outside temperature sensor signal.

Engine control module (ECM), temperature (°C)
Measurement range: -40 to +120 °C.
The engine control module (ECM) calculates the temperature from the internal temperature sensor signal in the control module.

Air conditioning (A/C) pressure (Pa)
Measurement range: 0 - 3100 kPa.
The engine control module (ECM) calculates the value from the signal from the air conditioning (A/C) pressure sensor.
The value shows the variable AC compressor's deployment (duty cycle).
The engine control module (ECM) calculates the pressure based on the signal from the air conditioning (A/C) pressure sensor. The pressure is given as a value relative to the atmospheric pressure.

Air conditioning (A/C) compressor, status (%)
Measurement range: 0-100%.
The value shows the variable AC compressor's deployment (duty cycle).

Engine coolant temperature (ECT) (°C)
Measurement range: -40 to +120 °C.
The engine control module (ECM) derives the temperature from the engine coolant temperature (ECT) sensor signal.

Atmospheric pressure (Pa)
Measurement range: 0 - 2267 hPa.
The value indicates atmospheric pressure at the engine control module (ECM).
Normal value at 0 meters above sea level is 1013 hPa.

Mass air flow (g/s)
Measurement range: 0 - 650 g/s.
The value indicates the mass air flow that passes through the mass air flow (MAF) sensor.
Engine control module (ECM) calculates the airflow in the intake system before the turbocharger using the signal from the mass airflow sensor

Intake air temperature (IAT) (°C)
Measurement range: -40 to +120 °C.
Engine control module (ECM) calculates the temperature of the intake air in the intake system using the signal from the air temperature sensor (integrated in mass airflow sensor).

Boost pressure (Pa)
Measurement range: 0 - 5000 hPa.
Engine control module (ECM) calculates the pressure in the intake system between the turbocharger and the electronic throttle unit using the signal from the boost pressure sensor.
Normal pressure at idle (warm engine) is atmospheric pressure.

Charge-air temperature (°C)
Measurement range: -40 to +120 °C.
Engine control module (ECM) calculates the temperature in the intake system between the turbocharger and electronic throttle unit using the signal from the air temperature sensor (integrated in boost pressure sensor).

Manifold absolute pressure (MAP) (Pa)
Measurement range: 0 - 5000 hPa.
Engine control module (ECM) calculates the pressure in the intake system after the electronic throttle unit using the signal from the air pressure sensor
Normal pressure at ignition on (open throttle) is atmospheric pressure.

Fuel temperature (°C)
Measurement range: -40 to +120 °C.
The engine control module (ECM) derives the temperature from the fuel temperature sensor signal. The fuel temperature sensor is integrated in the fuel pressure sensor.

Fuel pressure, fuel rail (Pa)
The parameter indicates absolute pressure.
The engine control module (ECM) calculates the pressure from the fuel pressure sensor signal.
Normal value approx. 480 ± 5 kPa when idling, in neutral and with the engine at operating temperature. The pressure falls with the ignition off

Fuel pressure, fuel rail (rel) (Pa)
The parameter indicates the relative pressure.
(Absolute pressure minus atmospheric pressure)
Normal value approx. 380 ± 5 kPa when idling, in neutral and with the engine at operating temperature. The pressure falls with the ignition off.

Fuel pump (FP), workload (%)
Measurement range 0-100%.
Working range: 10 - 85 %.
Normal value: 50 % (± 10 %).
The value indicates the signal transmitted from the engine control module (ECM) to the fuel pump (FP) control module.

Injection time (ms)
Measurement range: 0 - 524 ms.
The signal transmitted by the engine control module (ECM) for injection period.

EVAP valve, work load (%)
Measurement range 0-100%.
The value indicates the pulse width modulated (PWM) signal transmitted from the engine control module (ECM) to the evaporative emissions system (EVAP) valve.
0 % corresponds to closed valve, i.e. when there is no purging.

Evaporative emissions system (EVAP) flow (g/s)
Measurement range: 0 - 0.85 g/s.
The value indicates the estimated flow through the evaporative emission system (EVAP) valve. Used as an input parameter during compensation for other parts of the system.
Normal value at idle is 0 g/s when there is no purging and 0.85 g/s during purging.

Ignition advance (CA)
Measurement range: -20 to +62° CA BTDC.
Normal value when idling varies depending on the engine coolant temperature (ECT) etc.

Vehicle speed (km/h)
Measurement range: 0 - 255 km/h.
The value displays the vehicle speed.

Hint: Miles/h in certain markets.

Engine speed (rpm)
Measurement range: 0-10,400 rpm.
The engine control module (ECM) derives the engine speed (RPM) from the engine speed (RPM) sensor signal.
Idling speed varies depending on engine temperature. Normal value 650 ± 50 rpm with engine at operating temperature.

Brake pedal position (via CAN) (%)
Measurement range 0-100%.
The value indicates the position of the brake pedal, calculated from the signal transmitted from the brake control module (BCM).
When the brake pedal is not depressed the value is 0%. The value increases as the pedal is depressed.

Accelerator pedal position (via CAN) (%)
Measurement range 0-100%.
Analog signal from the accelerator pedal (AP) position sensor to the engine control module (ECM).
The value indicates the accelerator pedal (AP) position.
Approximately 8 %= the accelerator pedal (AP) completely released.
Approximately 88 %= the accelerator pedal (AP) completely depressed.
The analog signal is usually used by the engine control module (ECM).

Hint: The value must follow the parameter "Accelerator pedal (AP), PWM.

Accelerator pedal (AP) position (%)
Measurement range 0-100%.
PWM signal from the accelerator pedal (AP) position sensor to the engine control module (ECM).
The value indicates the accelerator pedal (AP) position.
Approximately 8 %= the accelerator pedal (AP) completely released.
Approximately 88 %= the accelerator pedal (AP) completely depressed.
The PWM signal is used if there is a fault with the analog signal.

Hint: The value must follow the parameter "Accelerator pedal (AP), analog.

Throttle position, desired value (%)
Measurement range 0-100%.
The value indicates the signal transmitted to the throttle unit from the engine control module (ECM).
0 % = throttle shut.
100 % = throttle fully open. This corresponds to an opening angle of approximately 84 degrees.

Throttle position (%)
Measurement range 0-100%.
The engine control module (ECM) calculates the value from potentiometer 1 for the throttle position sensor. The value indicates the throttle opening. If the engine control module (ECM) detects a fault in throttle position sensor potentiometer 1, the value from throttle position sensor potentiometer 2 will be used to represent the throttle angle. This presumes that the function of throttle position sensor potentiometer 2 is OK.
0 % = throttle shut.
100 % = throttle fully open. This corresponds to an opening angle of approximately 84 degrees.

Hint: Must follow the parameter "Throttle angle, desired value.

Throttle position, circuit 1 (%)
Measurement range: -3 to +130 %.
Normal value 0 - 100 %.
There is an electrical fault if the displayed value is outside the measurement range. The value must increase with increased throttle angle.
Approximately 0 % = throttle closed.
Approximately 100 % = wide open throttle (WOT). This corresponds to an opening angle of approximately 84 degrees.

Throttle position, circuit 2 (%)
Measurement range: -4 to +140 %.
Normal value 0 - 100 %.
There is an electrical fault if the displayed value is outside the measurement range. The value must increase with increased throttle angle.
Approximately 0 % = throttle closed.
Approximately 100 % = wide open throttle (WOT). This corresponds to an opening angle of approximately 84 degrees.

Rear heated oxygen sensor (HO2S), signal bank x (V)
Measurement range: 0 - 5 V.
The signal from the rear heated oxygen sensor (HO2S) to the engine control module (ECM).
Normal value when the engine is running at even load is approximately 0.6 V.

Front heated oxygen sensor (HO2S), signal bank x
Measurement range: 0 - 2.
Normal value is lambda=1.
At rich mixture is lambda less than 1.
At lean mixture is lambda greater than 1.

Front lambda control slow, bank x
The parameter displays the adaptation factor of the lambda probe.
Measurement range: 0 - 2.
Compensates/multiplies the injection period at the relevant load so that the lambda value can be correctly reached.
Normal value 1.
There are 36 adaptation windows per bank. Which window is active depends on the load and the engine speed.
Works together with "Front lambda control fast, bank x".

Front lambda control fast, bank x
The parameter displays the compensation factor of the lambda probe.
Measurement range: 0 - 2.
lambda value compensation increases or reduces the injection period depending on the deviation.
Normal value 1.
Works together with "Front lambda control slow, bank x".

Engine cooling fan (FC) (%)
Measurement range: 0-100%.
Engine control module (ECM) PWM signal to the engine cooling fan (FC) control module to activate the engine cooling fan (FC).

Reset valve camshaft, intake bank x (CA)
Measurement range 0-100%.
The signal transmitted by the engine control module (ECM) to control the camshaft reset valve.
The value indicates the average current for the PWM signal through the camshaft reset valve for controlling the camshaft shift angle (angle position).
The normal value when the camshaft is deployed and in the fixed position is 400 - 900 mA.
The value increases/decreases depending on control of the camshaft.

Camshaft's shift angle -intake bank x (CA)
The engine control module (ECM) calculates the value using the signals from the engine speed (RPM) sensor (crankshaft position) and the camshaft position (CMP) sensor (camshaft position).
The value indicates how much the camshaft is deployed. When the camshaft is in its 0-position (camshaft not deployed), the angle is 0° CA. When the camshaft is fully deployed, the angle is approx. 45° CA.
Normal value at idle, engine at operating temperature, approximately 0° CA.
CA = Crank Angle (crankshaft degrees)

Hint: The value must follow the parameter "Camshaft shift angle, intake desired value".

Camshaft shift angle, intake, desired value (CA)
The value indicates the engine control module (ECM) target value for "Camshaft shift angle, intake bank x".

Camshaft adaption, intake bank x (CA)
The value indicates the camshaft deviation from the basic setting by calculating the position of the camshaft in relation to the reference positions from the crankshaft.
The value is 0° when the camshaft position (angle) corresponds to the crankshaft position (angle).
The normal value for
- inlet camshaft: 75° CA (+/-8° CA)
The value is updated following adaptation of the camshaft position. The adaptation is carried out when the camshaft control is not active (fully returned camshaft).

Misfire counter emissions impact / catalytic converter damage, total
The value indicates the number of misfires for all cylinders during the present operating cycle.
The value is reset when the ignition is switched off.
Normal value is 0 (= no misfire).

Misfire counter cylinder x, average
The engine control module (ECM) calculates the average number of misfires in 10 operating cycles, each cylinder.
The value is affected by misfires which affect emissions and cause catalytic converter damage.
The value is reset when erasing diagnostic trouble codes.
Normal value is 0 (= no misfire).

Parameter, status

Gear position
Only vehicles that have an automatic transmission.
The engine control module (ECM) calculates the status of the signal from the directly connected cable from the transmission control module (TCM).
P/N engaged = gear selector position is in "Park" or "Neutral".
P/N disengaged = the gear selector position is not in "Park" or "Neutral".

Gear position (via CAN)
Only vehicles that have an automatic transmission.
the engine control module (ECM) calculates the status of the signal from the transmission control module (TCM) via CAN.
P/N engaged = gear selector position is in "Park" or "Neutral".
P/N disengaged = the gear selector position is not in "Park" or "Neutral".

Power supply mode
The value indicates the status of the power supply mode.
- Key removed
- Key approved
- Ignition off after Accessory position
- Accessory position
- Accessory position after Ignition on
- Ignition on
- Running
- Start attempt

Ignition switch position (via CAN)
The engine control module (ECM) calculates the status of the signal from the central electronic module (CEM) via CAN communication.

Starter relay
The status indicates if the engine control module (ECM) requested activation of the starter relay.
Active = Engine control module (ECM) activates starter relay.
Not active = Engine control module (ECM) does not activate starter relay.

Brake light switch
The engine control module (ECM) calculates the value from the brake lamp switch signal.
Activated = brake light switch actuated.
Not activated = stop lamp switch unaffected.