Engine 2 Data

Engine Speed - Range 0-16384 RPM: The VCM computes the Engine Speed from the fuel control reference input. The speed should remain close to the desired idle under the various engines loads with the engine idling.

Desired Idle - Range 0-3187 RPM: The VCM commands the desired IAC. The VCM compensates for various engine loads in order to maintain the desired idle speed.

EVAP Duty Cycle - Range (0 - 100%): The EVAP Duty Cycle indicates the EGR duty cycle that the VCM is commanding.

EVAP Canister Purge - OFF/ON: The EVAP Canister Purge pulls a small vacuum on the entire evaporative emission system. The scan tool displays if the EVAP Canister Purge Solenoid Valve is currently Off or On. When the scan tool displays ON, the small vacuum is being applied.

Air Fuel Ratio - Range (0.0:1 - 25.5:1): The Air to Fuel Ratio indicates the calculates Air to Fuel ratio that the VCM is commanding.

EGR Duty Cycle - (0 - 100%): The EGR Duty Cycle determines a percentage of time the valve is being opened and closed.

Actual EGR Position - Range (0 - 100%): The Actual EGR Position indicates the actual EGR position in a percentage.

Desired EGR Position - Range (0 - 199.9%): The Desired EGR Position indicates the desired EGR position in a percentage.

EGR Sensor - Range (0.00 - 5.00 Volts): The EGR Sensor indicates the actual EGR position in voltage.

Air Fuel Ratio - Range (0.0:1 - 25.5:1): The Air to Fuel Ratio indicates the calculates Air to Fuel ratio that the VCM is commanding.

Ignition 1 - Range (0.0 - 25.5 Volts): The Ignition 1 indicates the condition of the ignition input to the VCM.

IAC Position - Range (0 - 255) Counts: The scan tool displays in counts the Idle Air Control (IAC) pintle position commanded from the VCM. The greater the number of counts, the greater the command idle speed (air passages opened) is. The idle air control should respond fairly quickly to changes in the engine load in order to maintain the desired idle RPM.

Desired IAC - Range (0 - 255) Counts: The desired IAC indicates the desired IAC position.

ECT - Range -40°-215°C (-40° - 419°F): The Engine Coolant Temperature (ECT) sensor is mounted in the intake the intake manifold. The ECT sends the engine temperature information to the VCM. The VCM supplies 5 volts to the ECT sensor circuit. The sensor is a thermistor which changes the internal resistance as the temperature changes. When the sensor is cold meaning the internal resistance is high, the VCM monitors a high voltage signal. The VCM interprets the high voltage signal as a cold engine. As the sensor warms meaning the internal resistance decreases, the voltage signal decreases. The VCM interprets the lower resistance as a warm engine.

Start Up ECT - Range -40°-215°C (-40° - 419°F): When the engine is started, the VCM records the engine coolant temperature. The VCM uses the recorded temperature in order to calculate the time to a Closed Loop.

IAT - Range (-40° - 151°C): The VCM converts the resistance of the Intake Air Temperature (IAT) sensor to degrees. The VCM uses the intake air temperature in order to adjust the fuel delivery and the spark timing according to the incoming air density.

CMP Retard - Degrees: The CMP Retard indicates the difference between the CMP sensor and the CKP sensor in degrees.

Spark Control - Range (Advance/Retard): The Spark Control indicates if the VCM is commanding the spark advance or the spark retard.

Power Enrichment - Range (Yes/No): The Power Enrichment indicates if the Power Enrichment mode is active.

Brake Switch - Range (Open/Closed): The Brake Switch indicates the status of the brake switch.

TR Switch: The Trans. Range indicates the current drive gear.

A/B/C Range - Range (On/Off): The A/B/C Range indicates the current state of the transmission range switch.

Vehicle Speed- km/h - Range (0 - 255): The MPH - km/h indicates in MPH and in km/h how fast the drive wheels are turning.

Decel Fuel Mode - Range (Yes/No): The Decel Fuel Mode indicates if the VCM is in a Decel Fuel Mode.

1-2 Solenoid (Off/On): The scan tool will determine the status of the electronic solenoids in the automatic transmission. By determining the status of the solenoids, the correct gear state can also be determined.

2-3 Solenoid (Off/On): The scan tool will determine the status of the electronic solenoids in the automatic transmission. By determining the status of the solenoids, the correct gear state can also be determined.

3-2 Downshift Solenoid (Off/On): The scan tool will determine the status of the electronic solenoids in the automatic transmission. By determining the status of the solenoids, the correct gear state can also be determined.

TCC Enable - Range (Yes/No): The TCC Enable indicates the status of the TCC enable output.

TCC Duty Cycle - Range (0%-100%): The TCC Duty Cycle indicates the how often the vehicle is reaching a TCC lockup.

TCC Slip Speed - RPM: The TCC Slip Speed will be displayed on the scan tool based on the RPM of the engine and the amount of slip in a lockup condition.

Cruise Mode - Range (Yes/No): The Cruise Mode indicates if the driver has requested the cruise control.

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 run during this ignition cycle. When the engine stops running, the timer resets to zero.