Scan Tool Data Definitions Part 2
SCAN TOOL DATA DEFINITIONS 2Fuel Trim Cell
This parameter indicates the current fuel trim cell.
Generator F Terminal Signal
The scan tool displays 0-100 percent. This parameter indicates the generator field duty cycle as commanded by the voltage regulator. The powertrain control module (PCM) monitors the duty cycle using the generator F terminal circuit.
Generator L Terminal Signal Command
The scan tool displays ON / OFF. This parameter indicates the powertrain control module (PCM) commanded state of the generator L terminal. The PCM uses the L terminal to command the generator voltage regulator ON and OFF.
HO2S Bank 1 Sensor 1
The scan tool range is 0-1,275 mV (0-1.275 volts). This parameter indicates the output voltage for heated oxygen sensor (HO2S) bank 1 sensor 1 (rear bank fuel control oxygen sensor). The voltage should fluctuate constantly within a range between about 50 mV (lean exhaust) and 800 mV (rich exhaust) while operating in Closed Loop.
HO2S Bank 1 Sensor 2
The scan tool range is 0-1,275 mV (0-1.275 volts). This parameter indicates the output voltage for heated oxygen sensor (HO2S) bank 1 sensor 2 (post catalyst oxygen sensor). The voltage should fluctuate within a range between about 50 mV (lean exhaust) and 800 mV (rich exhaust) while operating in Closed Loop. The post-catalyst HO2S output voltage will fluctuate slowly over a longer period of time, compared to the fuel control oxygen sensors. This is due to the oxygen storage capacity of an efficiently operating catalyst.
HO2S Bank 2 Sensor 1
The scan tool range is 0-1,275 mV (0-1.275 volts). This parameter indicates the output voltage for HO2S bank 2 sensor 1 (front bank fuel control oxygen sensor). The voltage should fluctuate constantly within a range between about 50 mV (lean exhaust) and 800 mV (rich exhaust) while operating in Closed Loop.
IAC Position
The scan tool range is 0-255 counts. This parameter displays the powertrain control module (PCM) commanded position of the idle air control (IAC) pintle in counts. A larger number of counts indicates a retracted IAC valve which allows more air the idle air passage. The IAC position should respond quickly to changes in engine load in order to maintain the desired idle RPM.
IAT Sensor
The scan tool range is -40 to +150°C (-40 to +302°F). This parameter indicates the temperature of the intake air based on the signal voltage from the intake air temperature (IAT) sensor.
IMS
The scan tool displays Park, Park/Reverse, Reverse, Reverse/Neutral, Neutral, Neutral/Drive 4, Drive 4/Drive 3, Drive 3/Drive 2, Drive 2/Drive 1, Drive 1 or Invalid. This parameter is the decoded status of the four A/B/C/P inputs from the automatic transmission internal mode switch. If a valid combination of inputs is not received by the powertrain control module (PCM), Invalid will be displayed.
Ignition 0 Signal
The scan tool displays On or Off. This parameter indicates the state of the IGN 0 input to the powertrain control module (PCM).
Ignition 1 Signal
The scan tool range is 0-25.5 volts. This parameter indicates the system voltage detected by the powertrain control module (PCM).
Injector PWM Bank 1 AVG/Bank 2 AVG
This parameter indicates the average pulse width of the bank 1 and bank 2 injectors.
Knock Retard
The scan tool range 0-45 degrees. This parameter indicates the amount of timing retard commanded by the powertrain control module (PCM).
Long Term FT Avg. Bn1
The scan tool range is -99 to +99 percent. This parameter indicates the average Long Term FT correction for bank 1 calculated by the powertrain control module (PCM) during the current ignition cycle.
Long Term FT Avg Bn 2
The scan tool range is -99 to +99 percent. This parameter indicates the average Long Term FT correction for bank 2 calculated by the powertrain control module (PCM) during the current ignition cycle.
Long Term FT Bank 1
The scan tool range is -99 to +99 percent. This parameter indicates the Long Term FT correction for bank 1 as commanded by the powertrain control module (PCM).
Long Term FT Bank 2
The scan tool range is -99 to +99 percent. This parameter indicates the Long Term FT correction for bank 2 as commanded by the powertrain control module (PCM).
Loop Status
The scan tool displays Open or Closed. This parameter indicates the state of the fuel control system. A CLOSED display indicates that the powertrain control module (PCM) is using the signals from the heated oxygen sensors to control the fuel system.
MAF Sensor
The scan tool range is 0-655 grams per second (g/s). This parameter indicates the volume of air entering the engine.
MAF Sensor
The scan tool range is 0-65535 Hz. This parameter indicates the mass air flow (MAF) sensor frequency based on the volume of air entering the engine. The powertrain control module (PCM) converts the signal frequency to grams per second (g/s).
MAP Sensor
The scan tool range is 10-105 kPa/0-5 volts. This parameter indicates the manifold absolute pressure (MAP) sensor input to the powertrain control module (PCM).
MIL Command
The scan tool displays ON or OFF. This parameter indicates the powertrain control module (PCM) commanded state of the malfunction indicator lamp (MIL).
Mileage Since DTC Cleared
The scan tool range is 0-1,677,722. This parameter indicates the actual vehicle miles stored in the powertrain control module (PCM) since the DTCs were cleared.
Misfire Current #1 through #8
The scan tool range is 0-255 counts. This parameter indicates the possible misfires being detected on each cylinder during the last 2,000 cylinder firing events. The counters may normally display some activity, but the activity should be very low and equal for all cylinders.
Misfire History #1 through #8
The scan tool range is 0-255 counts. This parameter indicates the total level of misfire that has been detected on each cylinder. The misfire history counters will not update or show any activity until a misfire or DTC P0300 has become active. The misfire history counter will update every 200 cylinder firing events.
Non-Driven Wheel Speed
The scan tool range is 0-255 km/h (0-158 mph). This parameter indicates the speed of the rear wheels. The powertrain control module (PCM) receives the information from the electronic brake and traction control module (EBTCM) via class 2 serial data.
Odometer
The scan tool range is 0-1,677,722. This parameter indicates the actual vehicle miles stored in the powertrain control module (PCM).
PCM / VCM in VTD Fail Enable
The scan tool will display Yes or No. This will indicate that the powertrain control module (PCM) has received the correct password from the Passlock(R) module and a failure has occurred. The PCM will continue to enable fuel.
Powertrain Induced Chassis Pitch Command
The scan tool displays Active or Inactive.
Short Term FT Avg Bn 1
The scan tool range is -99 to +99 percent. This parameter indicates the average Short Term FT correction for bank 1 calculated by the powertrain control module (PCM) during the current ignition cycle.
Short Term FT Avg Bn 2
The scan tool range is -99 to +99 percent. This parameter indicates the average Short Term FT correction for bank 2 calculated by the powertrain control module (PCM) during the current ignition cycle.
Short Term FT Bank 1
The scan tool range is -99 to +99 percent. This parameter indicates the Short Term FT correction for bank 1 as commanded by the powertrain control module (PCM).
Short Term FT Bank 2
The scan tool range is -99 to +99 percent. This parameter indicates the Short Term FT correction for bank 2 as commanded by the powertrain control module (PCM).
Spark
The scan tool range is 0-64 degrees. This parameter indicates the amount of spark advance commanded by the powertrain control module (PCM).
Start-up ECT
The scan tool range is -40 to +150°C (-40 to +302°F). This parameter indicates the engine coolant temperature (ECT) at start-up.
Start-up IAT
The scan tool range is -40 to +150°C (-40 to +302°F). This parameter indicates the ambient air temperature at start-up.
Starter Relay Command
The scan tool displays ON or OFF. This parameter indicates the powertrain control module (PCM) commanded state of the starter relay control circuit.
TCC Brake Pedal Switch
The scan tool displays Applied or Released. This parameter indicates the torque converter clutch (TCC) brake switch input to the powertrain control module (PCM).
TCC Duty Cycle
The scan tool range is 0-100 percent. This display indicates the commanded percent of torque converter clutch (TCC) pulse width modulation (PWM) solenoid ON time. A display of 90 percent represents a fully energized commanded state. A display of 0 percent represents a de-energized commanded state.
TCC Enable Solenoid Command
The scan tool displays On / Off. This display indicates the commanded state of the torque converter clutch (TCC) solenoid.
TFP Sw.
The scan tool displays Park/Neutral, Reverse, Drive, or Invalid. This display indicates the decoded status of the two A/B inputs from the automatic transmission fluid pressure manual valve position switch.
TP Sensor
The scan tool range is 0-100 percent. This parameter indicates the throttle angle calculated by the powertrain control module (PCM) from the throttle position (TP) sensor voltage input.
TP Sensor
The scan tool range is 0-5 volts. This parameter indicates the throttle position (TP) sensor voltage input to the powertrain control module (PCM).
Torque Delivered Signal
The scan tool displays 0-100 percent. This display indicates the amount of available engine torque.
Torque Request Signal
The scan tool displays 0-100 percent. This parameter indicates the amount of torque requested by the EBTCM.
Traction Control Status
The scan tool display Active / Inactive. This parameter indicates the status of the traction control system.
Trans. Fluid Temp.
The scan tool range is -40 to +150°C (-40 to +302°F). This display indicates the temperature of the transmission fluid.
Vehicle Speed Sensor
The scan tool range is 0-255 km/h (0-158 mph). This parameter indicates the vehicle speed calculated by the powertrain control module (PCM) from the vehicle speed sensor (VSS).
VTD Auto Learn Timer
The scan tool indicates ACTIVE or INACTIVE. This parameter indicates the status of the vehicle theft deterrent system password learn.
VTD Fuel Disable
The scan tool displays Active or Inactive. This parameter indicates the status of the theft deterrent fuel disable command.
VTD Password
The scan tool displays OK or Incorrect. This parameter indicates the validity of the vehicle theft deterrent (VTD) password.
Warm-ups w/o Emission Faults
The scan tool displays counts. This display indicates the number of warm-up cycles without an emission failure.
Warm-ups w/o Non-Emission Faults
The scan tool displays counts. This display indicates the number of warm-up cycles without a non-emission failure.