The Auterra scan tool supports numerous live data parameters, statuses, readiness monitors, and test results. Live data parameters are parameters, or sensors, that provide real-time measurements (e.g. 32 mph). Statuses and readiness monitors provide a current status (e.g. Complete or Incomplete). And test results are measured by the vehicle's onboard computer and compared against internal pass/fail values.
Live Data Parameters (Modes 1 and 2)
Tabular Format Live Data Parameters »
+GPS HDOP - horizontal dilution of precision. A measure of the GPS receiver's position horizontal accuracy. The lower the number the more accurate the reading.
+GPS Satellites - the number of satellites currently being tracked by an external GPS receiver.
+GPS Speed - the speed of the vehicle as reported by an external GPS receiver.
+Analog In (4 inputs, 3 ranges each) - the analog input voltage measured at the DashDyno auxiliary port.
+Digital In 1 - the digital input state (high or low) measured on the DashDyno auxiliary port.
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 weather 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).
*Short Term Fuel Trim BX-SX (up to 8) - indicates the correction being used by the closed loop fuel algorithm. If the fuel system is open loop, 0% correction should be reported.
*Long Term Fuel Trim BX-SX (up to 8) - indicates the correction being used by the fuel control system in both open and closed loop modes of operation.
*Equivalence Ratio BX-SX (up to 16) - is defined as the ratio of the fuel-to-oxidizer ratio to the stoichiometric fuel-to-oxidizer ratio.
*Instant Economy - is defined as the instantaneous fuel economy of the vehicle (e.g. MPG).
*Average Economy - the average fuel economy of the vehicle over time.
*Fuel Used - amount of fuel used by the vehicle.
*Distance Traveled - distance traveled by the vehicle. This is not the odometer.
*Air Fuel Ratio - overall air to fuel ratio of the vehicle.
*Air Fuel Ratio BX-SX (up to 8) - air to fuel ratio of the vehicle computed for one bank (i.e. one oxygen sensor).
*Boost Pressure - the pressure measured within the intake manifold.
Trouble Codes and Freeze Frame (Modes 2, 3, 4, 7, 13, 14, 17 and 18)
- Stored Trouble Codes
- Pending Trouble Codes
- Freeze Frame (i.e. sensor measurements at time of Check Engine light illumination)
Statuses and Readiness Monitors (Mode 1)
- OBD Requirement
- Fuel System 1 Status
- Fuel System 2 Status
- Secondary Air Status
- Auxiliary Input Status
- Misfire Monitor Status
- Fuel System Status
- Comprehensive Component Monitoring Status
- Catalyst Monitoring Status
- Heated Catalyst Monitoring Status
- Evaporative System Monitoring Status
- Secondary Air System Monitoring Status
- A/C System Refrigerant Monitoring Status
- Oxygen Sensor Monitoring Status
- Oxygen Sensor Heater Monitoring Status
- EGR System Monitoring Status
ECU Oxygen Sensor Test Results (Mode 5)
Each supported oxygen sensor (up to 8) returns 1 or more of the following results. Each result consists of a measured value and a minimum/maximum test result pass/fail limit.
- Rich to lean sensor threshold voltage (constant)
- Lean to rich sensor threshold voltage (constant)
- Low sensor voltage for switch time calculation (constant)
- High sensor voltage for switch time calculation (constant)
- Rich to lean sensor switch time (calculated)
- Lean to rich sensor switch time (calculated)
- Minimum sensor voltage for test cycle (calculated)
- Maximum sensor voltage for test cycle (calculated)
- Time between sensor transitions (calculated)
- Sensor period (calculated)
ECU Test Result Parameters (Mode 6)
- Misfire Monitor General Data
- Mis-Fire Cylinder X Data (up to 12 cylinders)
- Oxygen Sensor Monitor Bank X - Sensor X (up to 16 O2 sensors)
- Catalyst Monitor Bank 1 (up to 4)
- EGR Monitor Bank 1 (up to 4)
- EVAP Monitor (up to 4)
- Purge Flow Monitor
- Oxygen Sensor Heater Monitor Bank 1 - Sensor 1 (up to 16 O2 sensors)
- Heated Catalyst Monitor Bank 1 (up to 4)
- Secondary Air Monitor (up to 4)
- Fuel System Monitor Bank X (up to 4)
Each test parameter above returns 1 or more of the following results. Each result consists of a measured value and a minimum/maximum test result pass/fail limit.
- Misfire counts for last/current driving cycles (calculated)
- EWMA misfire counts for last 10 driving cycles (calculated)
- Rich to lean sensor threshold voltage (constant)
- Lean to rich sensor threashold voltage (constant)
- Low sensor voltage for switch time calculation (constant)
- High sensor voltage for switch time calculation (constant)
- Rich to lean sensor switch time (calculated)
- Lean to rich sensor switch time (calculated)
- Minimum sensor voltage for test cycle (calculated)
- Maximum sensor voltage for test cycle (calculated)
- Time between sensor transitions (calculated)
- Sensor period (calculated)
Vehicle Information (Mode 9)
- Vehicle Identification Number (VIN)
- Calibration Identifications (CAL)
- Calibration Verification Numbers (CVN)
- OBD Monitor Conditions Encountered Counts
- Ignition Counter
- Catalyst Monitor Completion Counts Bank 1
- Catalyst Monitor Conditions Encountered Counts Bank 1
- Catalyst Monitor Completion Counts Bank 2
- Catalyst Monitor Conditions Encountered Counts Bank 2
- O2 Sensor Monitor Completion Counts Bank 1
- O2 Sensor Monitor Conditions Encountered Counts Bank 1
- O2 Sensor Monitor Completion Counts Bank 2
- O2 Sensor Monitor Conditions Encountered Counts Bank 2
- EGR Monitor Completion Condition Counts
- EGR Monitor Conditions Encountered Counts
- AIR Monitor Completion Condition Counts (Secondary Air)
- AIR Monitor Conditions Encountered Counts (Secondary Air)
- EVAP Monitor Completion Condition Counts
- EVAP Monitor Conditions Encountered Counts
On-Board Bi-Directional Tests (Mode 8)
- Evaporative System Leak Test
+ Parmeters marked with a plus (+) are supported by the DashDyno only. GPS-related parameters require an external GPS receiver.
* Parameters marked with an asterisk (*) are supported by the DashDyno and Dyno-Scan for Windows only. Not every vehicle supports every parameter. |
