Scan Tool Data Definitions 2

SCAN TOOL DATA DEFINITIONS

Engine Run Time: This parameter displays the time elapsed since the engine was started. The scan tool will display the time in hours, minutes and seconds. The engine run time will reset to zero when the engine stops running.

Engine Speed: This parameter displays the speed of the crankshaft as determined by the control module using an input from the CKP sensor. The scan tool will display a high value at high engine speeds and a low value at low engine speeds.

EVAP Fault History: This parameter displays the result of the evaporative emission (EVAP) system diagnostic as determined by the control module. The scan tool will display various messages, depending on the result of the test.

EVAP Purge Solenoid Command: This parameter displays the on-time or duty cycle of the EVAP purge solenoid commanded by the control module expressed as a percent. The scan tool will display a high percentage when the control module is commanding the EVAP purge solenoid to be open a large amount. The scan tool will display a low percentage when the control module is commanding the EVAP purge solenoid to be open a small amount. The scan tool will display 0 when the control module is commanding the EVAP purge solenoid closed.

EVAP Purge Solenoid Circuit Status: This parameter displays the diagnostic state of the output driver for the evaporative emission (EVAP) purge solenoid control circuit as determined by the control module. The scan tool will display OK if the circuit is operating correctly. The scan tool will display Fault if there is an open, short to ground or a short to voltage on the circuit.

EVAP Vent Solenoid Command: This parameter displays the state of the evaporative emission (EVAP) vent solenoid commanded by the control module. The scan tool will display a venting when the control module is commanding the EVAP vent solenoid to be open. The scan tool will display a not venting when the control module is commanding the EVAP vent solenoid to be closed.

EVAP Vent Solenoid Circuit Status: This parameter displays the diagnostic state of the output driver for the evaporative emission (EVAP) vent solenoid control circuit as determined by the control module. The scan tool will display OK if the circuit is operating correctly. The scan tool will display Fault if there is an open, short to ground or a short to voltage on the circuit.

Exh. CMP Angle Bank 1 or Bank 2: This parameter displays the degrees of advanced exhaust camshaft angle related to crankshaft position as determined by the control module based on input from the exhaust CMP sensors. The scan tool will display a higher value for a more advanced exhaust camshaft position. The scan tool will display a lower value when the exhaust camshaft is not being advanced, such as at idle.

Exh. CMP Bank 1 or Bank 2 Active Counter: This parameter displays an incrementing counter when the control module receives a signal from the exhaust camshaft position (CMP) sensor.

Exh. CMP Bank 1 or Bank 2 Command: This parameter indicates the commanded amount of camshaft advance by the control module The scan tool displays a high value for a large amount of advance, and a low value for a small amount of advance.

Exh. CMP Bank 1 or Bank 2 Variance: This parameter indicates the difference between the actual camshaft angle and the commanded camshaft angle as determined by the control module. The scan tool will display a higher value for larger differences, or a lower value if there is only a small difference.

Exh. CMP Solenoid Bank 1 or Bank 2 Circuit Status: This parameter displays the diagnostic state of the output driver for the exhaust CMP solenoid control circuit. The scan tool will display OK, incomplete, Open, Short B+, or Short Gnd. OK indicates that no circuit faults are detected during the current test. Incomplete indicates the circuit test is not complete. The other displays indicate that a short or open circuit/component exists, electronically disconnecting the circuit/component from the control module.

Ext. Travel BPP Signal: This parameter displays the state of the brake pedal as determined by the extended travel brake pedal position switch. The scan tool will display Applied when the brake pedal is depressed greater than approximately 40 percent of the total travel.

Fuel Level Sensor Left Tank: This parameter displays the voltage from the sensor used to monitor the fuel level inside the left fuel tank. The scan tool will display a low voltage reading when that the fuel level in the tank is low or near empty. The scan tool will display a high voltage reading when the fuel level in the tank is high or near full.

Fuel Level Sensor Right Tank: This parameter displays the voltage from the sensor used to monitor the fuel level inside the right fuel tank. The scan tool will display a low voltage reading when the fuel level in the tank is low or near empty. The scan tool will display a high voltage reading when the fuel level in the tank is high or near full.

Fuel Pump Relay Command: This parameter displays the commanded state of the fuel pump relay control circuit. The fuel pump relay should be on when the scan tool indicates the Fuel Pump Relay Command is On. The fuel pump relay should be OFF when the scan tool indicates the Fuel Pump Relay Command is Off.

Fuel Pump Relay Circuit Status: This parameter displays the diagnostic state of the output driver for the fuel pump relay control circuit. The scan tool will display OK if the circuit is operating correctly. The scan tool will display Fault if there is an open, short to ground or a short to voltage on the circuit.

Fuel Tank Level Remaining: This parameter displays the amount of fuel remaining in the fuel tank as measured in liters or gallons. The control module determines the amount of fuel remaining in the tank by using information from the fuel level sensor(s). The scan tool will display a higher value with a full fuel tank, and a lower value with an empty fuel tank.

Fuel Tank Pressure Sensor: This parameter displays the voltage signal sent to the control module from the sensor used to monitor the pressure inside the fuel tank. The scan tool will display a low voltage when the pressure in the fuel tank is high. The scan tool will display a high voltage when the pressure in the fuel tank is low or in a vacuum.

Fuel Tank Pressure Sensor: This parameter displays the fuel tank pressure as calculated based on a signal sent to the control module from the fuel tank pressure (FTP) sensor. The scan tool will display a low value when the pressure in the fuel tank is low or a vacuum. The scan tool will display a high value when the pressure in the fuel tank is high.

Fuel Tank Rated Capacity: This parameter displays the rated maximum quantity of fuel the fuel tank will hold. This is calibrated in the control module to match the vehicle.

Fuel Trim Cell: This parameter displays the fuel trim cell number as calculated by the control module based on engine speed and load inputs. The scan tool will display a lower number as conditions are nearer to idle, and a higher value as conditions approach maximum engine speed and maximum load.

Fuel Trim Learn: This parameter indicated if the control module is adjusting long term fuel trim in response to the short term fuel trim. The scan tool displays Enabled or Disabled. When conditions are appropriate for enabling long term fuel trim corrections, the scan tool displays Enabled.

Fuel Trim System Test State: This parameter indicates the status of the Fuel Trim System Test. The scan tool will display Disabled, Enabled, Monitoring, or Run Purge Test.

Fuel Volatility: This parameter indicates the rate the fuel can be vaporized in the cylinder as calculated by the control module. The scan tool will display HIGH when the fuel volatility is high. The scan tool will display LOW when the fuel volatility is low.

HO2S Bank 1 Sensor 1: This parameter indicates the heated oxygen sensor (HO2S) bank 1 sensor 1 output voltage as measured by the control module. The scan tool value fluctuates constantly while operating in Closed Loop. The scan tool will display a higher value during rich running conditions, and a lower value during leaner running conditions.

HO2S Bank 1 Sensor 2: This parameter indicates the HO2S bank 1 sensor 2 output voltage as measured by the control module. The scan tool value fluctuates constantly while operating in Closed Loop. The scan tool will display a higher value during rich running conditions, and a lower value during leaner running conditions. 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: This parameter indicates the HO2S bank 2 sensor 1 output voltage as measured by the control module. The scan tool value fluctuates constantly while operating in Closed Loop. The scan tool will display a higher value during rich running conditions, and a lower value during leaner running conditions.

HO2S Bank 2 Sensor 2: This parameter indicates the HO2S bank 2 sensor 2 output voltage as measured by the control module. The scan tool value fluctuates constantly while operating in Closed Loop. The scan tool will display a higher value during rich running conditions, and a lower value during leaner running conditions. 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 Heater Bn 1 Sen. 1: This parameter displays the current through the control module when the bank 1 sensor 1 HO2S heater is commanded ON by the control module. HO2S Heater Bn 1 Sen. 1 is a range of values indicating a low current when the heater circuit resistance is high to a high current when the heater circuit resistance is low.

HO2S Heater Bn 1 Sen. 2: This parameter displays the current through the control module when the bank 1 sensor 2 HO2S heater is commanded ON by the control module. HO2S Heater Bn 1 Sen. 2 is a range of values indicating a low current when the heater circuit resistance is high to a high current when the heater circuit resistance is low.

HO2S Heater Bn 2 Sen. 1: This parameter displays the current through the control module when the bank 2 sensor 1 HO2S heater is commanded ON by the control module. HO2S Heater Bn 2 Sen. 1 is a range of values indicating a low current when the heater circuit resistance is high to a high current when the heater circuit resistance is low.

HO2S Heater Bn 2 Sen. 2: This parameter displays the current through the control module when the bank 2 sensor 2 HO2S heater is commanded ON by the control module. HO2S Heater Bn 2 Sen. 2 is a range of values indicating a low current when the heater circuit resistance is high to a high current when the heater circuit resistance is low.

HO2S Bank 1 Sensor 1 Heater Command: This parameter displays the commanded state of the Bank 1 Sensor 1 heater by the control module. The scan tool will display a higher value as the heater command is increased, and a lower value if the heater is not commanded ON.

HO2S Bank 1 Sensor 1 Heater Command: This parameter displays the commanded state of the Bank 1 Sensor 1 heater by the control module. The scan tool will display ON when the heater is commanded ON. The scan tool will display OFF when the heater is commanded OFF.

HO2S Bank 1 Sensor 2 Heater Command: This parameter displays the commanded state of the Bank 1 Sensor 2 heater by the control module. The scan tool will display a higher value as the heater command is increased, and a lower value if the heater is not commanded ON.

HO2S Bank 1 Sensor 2 Heater Command: This parameter displays the commanded state of the Bank 1 Sensor 2 heater by the control module. The scan tool will display ON when the heater is commanded ON. The scan tool will display OFF when the heater is commanded OFF.

HO2S Bank 2 Sensor 1 Heater Command: This parameter displays the commanded state of the Bank 2 Sensor 1 heater by the control module. The scan tool will display a higher value as the heater command is increased, and a lower value if the heater is not commanded ON.

HO2S Bank 2 Sensor 1 Heater Command: This parameter displays the commanded state of the Bank 2 Sensor 1 heater by the control module. The scan tool will display ON when the heater is commanded ON. The scan tool will display OFF when the heater is commanded OFF.

Hot Open Loop: This parameter indicates the status of the fuel delivery system. The scan tool will display Active if the fuel system is running in Open Loop due to a temperature concern. The scan tool will display Inactive if the fuel system is operating normally.

IAT Sensor: This parameter displays the temperature of the air entering the engine as calculated by the control module based on the input from the intake air temperature (IAT) sensor. The scan tool will display a low value when the air temperature is low, and a high value when the air temperature is high.

Ignition Accessory Signal: This parameter displays the state of the ignition 0 input to the control module from the ignition switch. The scan tool will display On when the ignition switch is in the ignition 0 position. The scan tool will display Off when the ignition switch is in any other position.

Ignition Off Time: This parameter displays the time elapsed since the ignition was last turned OFF. The scan tool will display the time in hours, minutes and seconds.

Ignition 1 Signal: This parameter displays the voltage measured at the ignition 1 circuit of the control module. Voltage is applied to the control module when the ignition switch is in the ignition 1 position. The scan tool will display a low value when the voltage is low. The scan tool will display a high value, such as battery voltage, when the voltage is higher.

Injector PWM Bank 1: This parameter indicates the average commanded ON time for each injector on Bank 1 by the control module. The scan tool will display a larger value for a longer injector commanded ON time, causing more fuel to be delivered to the cylinders. The scan tool will display a smaller value for a shorter injector commanded ON time, causing less fuel to be delivered to the cylinders.

Injector PWM Bank 2: This parameter indicates the average commanded ON time for each injector on Bank 2 by the control module. The scan tool will display a larger value for a longer injector commanded ON time, causing more fuel to be delivered to the cylinders. The scan tool will display a smaller value for a shorter injector commanded ON time, causing less fuel to be delivered to the cylinders.

Injector 1-8 Disabled Due to Misfire: This parameter displays the status of the fuel injector driver by the control module. The scan tool will display YES if the fuel injector is being disabled due to a misfire detection. The scan tool will display NO if the fuel injector is not being disabled by the control module due to a misfire.

Int. CMP Angle Bank 1 or Bank 2: This parameter displays the degrees of advanced intake camshaft angle related to crankshaft position as determined by the control module based on input from the intake CMP sensors. The scan tool will display a higher value for a more advanced intake camshaft position. The scan tool will display a lower value when the intake camshaft is not being advanced, such as at idle.

Int. CMP Bank 1 or Bank 2 Active Counter: This parameter displays an incrementing counter when the control module receives a signal from the intake camshaft position (CMP) sensor.

Int. CMP Bank 1 or Bank 2 Command: This parameter indicates the commanded amount of camshaft advance by the control module The scan tool displays a high value for a large amount of advance, and a low value for a small amount of advance.

Int. CMP Bank 1 or Bank 2 Variance: This parameter indicates the difference between the actual camshaft angle and the commanded camshaft angle as determined by the control module. The scan tool will display a higher value for larger differences, or a lower value if there is only a small difference.

Int. CMP Solenoid Bank 1 or Bank 2 Circuit Status: This parameter displays the diagnostic state of the output driver for the intake CMP solenoid control circuit. The scan tool will display OK, incomplete, Open, Short B+, or Short Gnd. OK indicates that no circuit faults are detected during the current test. Incomplete indicates the circuit test is not complete. The other displays indicate that a short or open circuit/component exists, electronically disconnecting the circuit/component from the control module.

Intake Manifold Pressure: This parameter is the calculated difference between the manifold absolute pressure (MAP) and the supercharge inlet pressure (SCIP).

Knock Detected Cyl.1-8: This parameter displays the status of each cylinder for knock detection by the control module. The scan tool will display YES if a knock condition has been detected related to that cylinder combustion event. The scan tool will display NO if There is no knock condition detected related to that cylinder combustion event.

Knock Retard: This parameter indicates the amount of spark advance the control module removes from the ignition control (IC) spark advance in response to the signal from the knock sensor(s). The scan tool displays a high value for a large amount of spark retard, and a low value for a small amount of spark retard.