Nology PDA Dyno


Supported Sensors

The Nology LaptopDyno™ and PDA-Dyno™ / OBD II Scan Tool supports the following sensors and readiness monitors. Not every sensor is supported by all car manufacturers. 

Supported Parameters

Air Flow Rate From MAF – indicates the airflow rate as measured by the mass air flow sensor.

Absolute Throttle Position – the absolute throttle position (not the relative or learned) throttle position. Usually above 0% at idle and less than 100% at full throttle.

Calculated Load Value – indicates a percentage of peak available torque. Reaches 100% at wide open throttle at any altitude or RPM for both naturally aspirated and boosted engines.

Engine Coolant Temp – engine coolant temperature derived from an engine coolant temperature sensor or a cylinder head temperature sensor.

Engine RPM – displays the current engine revolutions per minute value.

Fuel Rail Pressure (gauge) – displays the fuel rail pressure at the engine when the reading is referenced to atmosphere (gauge pressure).

Ignition Timing Advance – ignition timing advance for #1 cylinder (not including mechanical advance).

Intake Manifold Pressure – indicates the manifold pressure derived from a Manifold Absolute Pressure sensor.

Long Term Fuel Trim-BX (up to 2) – indicates the correction being used by the fuel control system in both open and closed loop modes of operation.

O2 Sensor BX-SX (up to 8) – indicates the voltage for conventional 0 to 1V oxygen sensors. O2 sensors with a different full-scale voltage shall be normalized to this range or, if a wide range sensor, may use the wide range parameters instead.

Short Term Fuel Trim-BX (up to 2) – indicates the correction being used by the closed loop fuel algorithm. If the fuel system is open loop, 0% correction should be reported.

Time Since Engine Start – shall increment the time since the engine was started while the engine is running.

Vehicle Speed – displays the vehicle road speed.

Absolute Load Value – is the normalized value of air mass per intake stroke displayed as a percent. 

Absolute Throttle Position (up to 3) – the absolute throttle position (not the relative or learned) throttle position. Usually above 0% at idle and less than 100% at full throttle. 

Accelerator Pedal Position (up to 3) - the absolute pedal position (not the relative or learned) pedal position. Usually above 0% at idle and less than 100% at full throttle. 

Ambient Air Temperature – displays the ambient air temperature. 

Barometric Pressure – barometric pressure normally obtained from a dedicated barometric sensor. Note some whether services report barometric pressure adjusted to sea level. In these cases, the reported value may not match the displayed value. 

Catalyst Temp Bank X – Sensor X (up to 4) – displays the catalyst substrate temperature. 

Commanded EGR – display 0% when the EGR is commanded off, 100% when the EGR system is commanded on, and if the EGR is duty cycled somewhere between 0% and 100%. 

Commanded Equivalence Ratio – fuel systems that use conventional oxygen sensor displays the commanded open loop equivalence ratio while the system is in open loop. Should report 100% when in closed loop fuel. To obtain the actual air/fuel ratio being commanded, multiply the stoichiometric A/F ratio by the equivalence ratio. For example, gasoline, stoichiometric is 14.64:1 ratio. If the fuel control system was command an equivalence ratio of 0.95, the commanded A/F ratio to the engine would be 14.64 * 0.95 = 13.9 A/F. 

Commanded Evaporative Purge – displays 0% when no purge is commanded and 100% at the maximum commanded purge position/flow. 

Commanded Throttle Actuator – displays 0% when the throttle is commanded closed and 100% when the throttle commanded open. 

Control Module Voltage – power input to the control module. Normally the battery voltage, less any voltage drop between the battery and the control module. 

Distance Since DTCs Cleared – distance accumulated since DTCs where cleared with a scan tool. 

Distance Traveled While MIL On – accumulates the vehicle distance traveled while the MIL light is illuminated. 

EGR Error – error as percent of actual commanded EGR. Negative percent is less than commanded and positive is more than commanded. 

Evap System Vapor Pressure – evaporative system vapor pressure normally obtained from a sensor located in the fuel tank. 

Fuel Level Input – indicates the nominal fuel tank liquid fill capacity as a percent of maximum. 

Fuel Rail Pressure – indicates the fuel rail pressure at the engine referenced to atmosphere (gauge pressure).

Fuel Rail Pressure Rel Manifold – displays the fuel rail pressure referenced to the manifold vacuum (relative pressure). 

Intake Air Temperature – displays the intake manifold air temperature. 

Minutes Run with MIL On – accumulated minutes of engine run time while the MIL light is on.

O2 Sensor BX-SX Wide Range mA (up to 8) – shows milliamps for linear or wide-ratio oxygen sensors. 

O2 Sensor BX-SX Wide Range V (up to 8) – shows voltage for linear or wide-ratio oxygen sensors. 

Relative Throttle Position – relative or “learned” throttle position.

Time Since DTCs Cleared – accumulated time since DTCs where cleared with a scan tool. 

Warm-ups Since DTCs Cleared – number of warm-up cycles since all DTCs were cleared via a scan tool. A warm-up is defined as the coolant temperature rising by at least 22°C (40°F) and the engine temperature reaches at a minimum 70°C (160°F) (60°C (140°F) for diesels).

Trouble Codes and Freeze Frame

Status and Readiness Monitors

ECU Oxygen Sensor Test Results

* Not every vehicle supports every parameter.