Engine 1 Data

Engine Speed - Range 0-16384 RPM: Engine Speed is computed by the PCM from the fuel control reference input.

Desired Idle Speed - 0-3187 RPM: The PCM commands the idle speed. The PCM compensates for various engine loads in order to maintain the desired idle speed. The actual RPM's should remain close to the desired idle under the various engine loads with the engine idling.

Engine Coolant Temperature (ECT) - Range -40°C-215°C (-40°F-419°F): The Engine Coolant Temperature (ECT) sensor sends a signal to the PCM relative to the engine coolant temperature. The PCM then converts this signal to degrees Celsius. The PCM uses the engine coolant temperature in order to adjust the fuel delivery and the spark timing.

Intake Air Temperature (IAT) - Range -40°C-215°C (40°F-419°F): The Intake Air Temperature (IAT) sensor sends a signal to the PCM relative to the intake incoming air. The PCM converts the signal of the IAT sensor to degrees Celsius. The PCM uses the intake air temperature in order to adjust the fuel delivery and the spark timing.

Manifold Absolute Pressure (MAP) - Range 11-105 kPa, 0-5.0 Volts: The Manifold Absolute Pressure (MAP) sensor measures the intake manifold pressure. The manifold pressure changes with the engine speed changes and engine load changes. The PCM uses the manifold absolute pressure in order to adjust the fuel delivery and the spark timing.

Barometric Absolute Pressure (BARO) - Range 11-105 kPa, 0-5.0: The Barometric (BARO) pressure is read from the MAP sensor when the ignition is ON and the engine is oft and at wide open throttle. The PCM uses the BARO in order to adjust the fuel delivery and the spark control due to the altitude changes.

Throttle Position (TP) Sensor - Range 0.0-0.5 Volts: The PCM uses the Throttle Position (TP) sensor to determine the amount of the throttle demanded by the operator of the vehicle. The TP sensor reads between 0.360.96 volt at idle to above 4.0 volts at Wide Open Throttle (WOT).

TP Angle - Range 0-100%: The PCM computes the Throttle Position (TP) from the TP sensor voltage input. The TP angle will auto zero to 0% at idle when the TP voltage is below 0.90 volt. The TP angle will read 100% at Wide Open Throttle (WOT).

O2S 1 - Range 0-1132 mV: The reading represents the exhaust oxygen sensor output voltage. This voltage will fluctuate constantly between 100 mV (lean exhaust) to 900 mV (rich exhaust) when operating in a Closed Loop.

HO2S Sensor 2 - Range 0-1132 mV: The Rear Heated Oxygen Sensor (HO2S 2) represents the exhaust oxygen output voltage past the catalytic converter. This voltage remains inactive, or the voltage will appear lazy within a range of 100 mV (lean exhaust) and 900 mV (rich exhaust) when the system is operating in a Closed Loop.

Fuel Trim Cell - Range 0-22: A Fuel Trim Cell depends upon the engine speed and the MAP sensor readings. RPM vs. MAP is broken down into 22 fuel trim cells. The Fuel Trim Cell indicates which cell is currently active.

Fuel Trim Index - Range 0-255 (-100% to 100%): The Fuel Trim (FT) Index represents the average Long Term Fuel Trim for certain cells which are used in determining DTC P0171 and P0172.

Short Term FT - Range 0-255 (-100% to 100%): The Short Term Fuel Trim represents a short term correction of the fuel delivery. The correction is in response to the amount of time the oxygen sensor voltage is above or below 450 mV. An oxygen sensor voltage below 450 mV indicates a lean air to fuel mixture. If the oxygen sensor has mainly read below 450 mV, the short term fuel trim will increase in order to command the PCM to add fuel. If the oxygen sensor voltage stays mainly above the threshold, the PCM will reduce the fuel delivery in order to compensate for the indicated rich condition.

Long Term FT - Range 0-255 (-100% to 100%): The Long Term Fuel Trim (FT) is derived from the short term fuel trim value. The Long Term Fuel Trim (FT) is used for the long term correction of the fuel delivery. A value of the 128 counts (0%) indicates that the fuel delivery requires no compensation in order to maintain a 14.7:1 air to fuel ratio. A value below 128 counts means that the fuel system is too rich and the fuel delivery is being reduced. The PCM is decreasing the injector pulse width. A value above 128 counts indicates that a lean condition exists for which the PCM is compensating.

Short Term FT - Average - Range 0-255 (-100% to 100%): The Short Term Fuel Trim (FT) Average is derived from the short term fuel trim from all of the cells. The PCM takes all of the values. The PCM then creates one average value.

Long Term FT - Average - Range 0-255 (-100% to 100%): The Long Term Fuel Trim (FT) Average is derived from the long term fuel trim from all of the cells. The PCM takes all of the values. The PCM then creates one average value.

Low Octane Spark Modifier - Range 0-90 degrees: The Low Octane Fuel Spark Modifier indicates the long term amount of the spark advance the PCM removes from the ignition control. The PCM responds to the Knock Sensor (KS) signal.

Spark - Range 64 to -64 degrees: Spark is the amount of spark the PCM programs in the ignition system. The PCM computes the desired spark advance. The PCM uses the engine coolant temperature, he engine RPM, the engine load, the vehicle speed, the operating mode.

Knock Retard - 0-90 degrees: The Knock Sensor (KS) retard is the amount spark advance the PCM removes from the IC.

KS Noise Channel - Range Yes/No: The KS Noise Channel indicates when the PCM detects the Knock Sensor (KS) signal. The PCM should display No at idle.

KS Active Counter - Rang. 0-255 Counts: The Knock Sensor (KS) activity counter indicates if the PCM is receiving the varying frequency output of the KS. The KS counter increases with the engine speed.

Med. Resolution Resync Counter - Range 0-255 Counts: The medium resolution resync counter displays the number of times the PCM had to resync the Crankshaft Position (CKP) sensor. The Med. Resolution Resync Counter is helpful in diagnosing the DTC P0335.

Crankshaft Position Sensor (CKP) Active Counter - Range 0-255 Counts: The Crankshaft Position (CKP) activity counter displays the number of 7x resync pulses from the ignition module.

Camshaft Position (CMP) Active Counter - Range 0-255 Counts: The Camshaft Position (CMP) activity counter displays the activity sent to the PCM from the CMP sensor. The counter will continually increment while the engine is running. The CMP Act. Counter is helpful in diagnosing the DTC P0342.

Med. Resolution Engine Sync. - Range YES/NO: The medium resolution engine sync. displays if the PCM is receiving the 7x sync pulse. The Med. Resolution Engine Sync. is helpful in diagnosing the DTC P0300 and P0301-P0304.

CMP Resync Counter - Range 0-255 Counts: The Camshaft Position (CMP) resync counter displays the number of times the PCM had to resync with the CMP sensor. The CMP Resync Counter is helpful in diagnosing the DTC P0341.

Purge Lrn. Mem. - Range 0.00-1.00: The purge learn memory is a display of the PCM adding or subtracting the fuel. The purge learn memory is based on the EVAP Purge. This number is added to the fuel trim calculations. The fuel is added or subtracted there. A number near 1 indicates that the fuel is being added to the fuel trim. A number near 0 indicates that fuel is being taken away from the fuel trim.

EVAP Canister Purge- Range 0-100%: The Evaporative Emission (EVAP) purge valve solenoid is a proportional signal used in order to control the evaporative emission canister purge function. At 0% the valve is commanded fully closed. 100% implies that the valve is fully open.

IAC Position - Range 0-255 Counts: The Idle Air Control (IAC) pintle position command from the PCM is displayed in counts. The higher the counts read, the greater the commanded idle speed is. The idle air control responds fairly quickly to changes in the engine load in order to maintain the desired idle RPM.

Transmission Range - Range Valid/Invalid: Trans Range represents the decoded status of the four inputs from the Transaxle Range Switch Assembly. The combination of Transaxle range inputs the position of the Transaxle manual valve.

Vehicle Speed km/h - 0-255 MPH, 0-255 km/h: The PCM converts the vehicle speed sensor into MPH (km/h) for the display. From the PCM, the vehicle speed output is 4000 pulses per mile. The scan tool uses the class 2 serial data from the PCM in order to obtain the vehicle speed. The instrument panel cluster, the cruise control module, and the multi-function alarm module use the 4000 ppm output.

Ignition 1 - Range 0-25.5 volts: The ignition volts represents the system voltage measured by the PCM at the ignition teed circuit.

Loop Status - Range Open/Closed: A Closed Loop displayed indicates that the PCM is controlling the fuel delivery according to the Oxygen Sensor voltage. The PCM controls the fuel delivery air to fuel ratio as close to 14.7:1 as possible.

Power Enrichment - Active/Inactive: Active displayed indicates that the PCM has detected conditions appropriate to operate in power enrichment mode. The PCM will command Power Enrichment mode when a large increase in throttle position and load is detected. While in Power Enrichment, the PCM will increase the amount of fuel delivered by entering Open Loop and increasing the injector pulse width. This is done to prevent a possible sag or hesitation from occuring during acceleration.

Calc. Air Flow- Range 0-512 g/s: The calculated air flow is a calculation based on the manifold absolute pressure. Several diagnostics use the Air Flow Calculation in order to determine when to run.

Engine Load - Range 0-100%: The load indicates the engine load based on the manifold absolute pressure. The higher the percentage, the greater the load the engine is under.

Engine Run Time - Range 0:00:00-18:12:15 hours:minutes:seconds: The engine run time is a measure of how long the engine has been running. When the engine stops running, the timer resets to zero.

# of Curr. Diagnostic Trouble Code (DTC)s - Range 0-255: The # of Curr. DTCs indicates the total number of current Diagnostic Trouble Codes (DTCs) set. These current DTCs set does not necessarily mean that the Malfunction Indicator Lamp (MIL) is illuminated.