Scan Tool Data Definitions 2

SCAN TOOL DATA DEFINITIONS

EVAP Fault History: This parameter displays the result of the 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 Circuit Status: This parameter displays the diagnostic state of the output driver for the evaporative emission 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 Purge Solenoid Command: This parameter displays the on-time or duty cycle of the evaporative emission (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 Test Abort Reason: This parameter displays the reason the EVAP test was aborted by the control module. The scan tool will display various messaged to indicate the reason the last test failed to complete.

EVAP Test Result: This parameter displays the result of the EVAP test performed by the control module. The scan tool will display various messaged to indicate the final result of the test.

EVAP Test State: This parameter displays the status of the EVAP test performed by the control module. The scan tool will display various messaged to indicate the current status of the test. The scan tool will display Wait For Purge, Test Running, or Test Complete.

EVAP Vent Solenoid Circuit Status: This parameter displays the diagnostic state of the output driver for the evaporative emission 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.

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.

Exhaust 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 advance, such as at idle.

FC Relay 1 Circuit Status: This parameter displays the diagnostic state of the output driver for the cooling fan relay 1 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.

FC Relay 1 Command: This parameter displays the commanded state of the cooling fan relay 1 control circuit. The cooling fan relay 1 should be on when the scan tool indicates the FC Relay 1 Command is On. The cooling fan relay 1 should be off when the scan tool indicates the FC Relay 1 Command is Off.

FC Relay 2 Circuit Status: This parameter displays the diagnostic state of the output driver for the cooling fan relay 2 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.

FC Relay 2 Command: This parameter displays the commanded state of the cooling fan relay 2 control circuit. The cooling fan relay 2 should be on when the scan tool indicates the FC Relay 2 Command is On. The cooling fan relay 2 should be off when the scan tool indicates the FC Relay 2 Command is Off.

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 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 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 Signal: The scan tool displays Volts. The amount of voltage the lift pump system is drawing. Also, a good functional check of the lift pump relay and oil pressure switch.

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 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 being commanded to adjusting long term fuel trim in response to the short term fuel trim. The scan tool displays Enabled or Disabled. When fuel trim is being learned because of an external command, the scan tool displays Enabled. Under normal conditions the scan tool displays Disabled.

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.

Generator L-Terminal Signal Command: This parameter indicates whether the control module is allowing the generator to operate. The control module can disable the generator under certain conditions. The scan tool will YES if the control module is allowing generator operation, while NO indicates that the control module is not allowing generator operation.

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 heated oxygen sensor (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 sensor s. This is due to the oxygen storage capacity of an efficiently operating catalyst.

HO2S Bank 2 Sensor 1: This parameter indicates the heated oxygen sensor (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 heated oxygen sensor (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 sensor s. This is due to the oxygen storage capacity of an efficiently operating catalyst.

HO2S Heater Bn 1 Sen. 1: This parameter displays the duty cycle of the HO2S Heater when commanded by the control module. HO2S Heater Bn 1 Sen. 1 is a range of values indicating a low percentage when the heater circuit is commanded ON less to a high percentage when the heater circuit is commanded ON more.

HO2S Heater Bn 1 Sen. 2: This parameter displays the duty cycle of the HO2S Heater when commanded by the control module. HO2S Heater Bn 1 Sen. 2 is a range of values indicating a low percentage when the heater circuit is commanded ON less to a high percentage when the heater circuit is commanded ON more.

HO2S Heater Bn 2 Sen. 1: This parameter displays the duty cycle of the HO2S Heater when commanded by the control module. HO2S Heater Bn 2 Sen. 1 is a range of values indicating a low percentage when the heater circuit is commanded ON less to a high percentage when the heater circuit is commanded ON more.

HO2S Heater Bn 2 Sen. 2: This parameter displays the duty cycle of the HO2S Heater when commanded by the control module. HO2S Heater Bn 2 Sen. 2 is a range of values indicating a low percentage when the heater circuit is commanded ON less to a high percentage when the heater circuit is commanded ON more.

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 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 0 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 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.

Ignition Spark Efficiency: This parameter indicates how much of the ignition capacity is being required to operate the engine as calculated by the control module. The scan tool will display a high value when more spark is require, such as high load conditions. The scan tool will display low values when less spark is required, such as at idle.

Initial Brake applied signal: This parameter indicates the status of the initial brake applied switch as determined by the control module. The scan tool will display applied when the brake pedal is depressed. The scan tool will display released when the brake pedal is not depressed.

Injector 1-8 Command: This parameter displays the commanded on time of each fuel injector by the control module. The scan tool will display a low value at idle, and a high value during high engine speeds and loads.

Injector PWM Bank 1 Average: 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 Average: 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.

Instant FT Bank 1: This parameter indicates the instant fuel trim of Bank 1 as calculated by the control module. The scan tool will display a low value when little fuel is being required, and a higher value when more fuel is being required to maintain proper fuel trim.

Instant FT Bank 2: This parameter indicates the instant fuel trim of Bank 2 as calculated by the control module. The scan tool will display a low value when little fuel is being required, and a higher value when more fuel is being required to maintain proper fuel trim.

Intake 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 advance, such as at idle.

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.

Long Term FT Bank 1: This parameter is calculated by the control module based on the Short Term FT value. The Long Term FT bank 1 is used for the long term correction of the fuel delivery in bank 1. The scan tool will a high value for a large amount of long term fuel correction, and 0% for no long term fuel trim correction. The scan tool will display a negative value when fuel system is running too rich and fuel is being removed from the combustion event. The scan tool will display a positive value if the fuel system is running lean and fuel is being added to the combustion event.

Long Term FT Bank 2: This parameter is calculated by the control module based on the Short Term FT value. The Long Term FT bank 2 is used for the long term correction of the fuel delivery in bank 1. The scan tool will a high value for a large amount of long term fuel correction, and 0% for no long term fuel trim correction. The scan tool will display a negative value when fuel system is running too rich and fuel is being removed from the combustion event. The scan tool will display a positive value if the fuel system is running lean and fuel is being added to the combustion event.

LT FT Bank 1 High RPM/Load: This parameter is calculated by the control module based on the Short Term FT value under High RPM/Load conditions. The Long Term FT bank 1 is used for the long term correction of the fuel delivery in bank 1. The scan tool will a high value for a large amount of long term fuel correction, and 0% for no long term fuel trim correction. The scan tool will display a negative value when fuel system is running too rich and fuel is being removed from the combustion event. The scan tool will display a positive value if the fuel system is running lean and fuel is being added to the combustion event.

LT FT Bank 2 High RPM/Load: This parameter is calculated by the control module based on the Short Term FT value under High RPM/Load conditions. The Long Term FT bank 2 is used for the long term correction of the fuel delivery in bank 2. The scan tool will a high value for a large amount of long term fuel correction, and 0% for no long term fuel trim correction. The scan tool will display a negative value when fuel system is running too rich and fuel is being removed from the combustion event. The scan tool will display a positive value if the fuel system is running lean and fuel is being added to the combustion event.

LT FT Bank 1 low RPM/Load: This parameter is calculated by the control module based on the Short Term FT value under low RPM/Load conditions. The Long Term FT bank 1 is used for the long term correction of the fuel delivery in bank 1. The scan tool will a high value for a large amount of long term fuel correction, and 0% for no long term fuel trim correction. The scan tool will display a negative value when fuel system is running too rich and fuel is being removed from the combustion event. The scan tool will display a positive value if the fuel system is running lean and fuel is being added to the combustion event.

LT FT Bank 2 low RPM/Load: This parameter is calculated by the control module based on the Short Term FT value under low RPM/Load conditions. The Long Term FT bank 2 is used for the long term correction of the fuel delivery in bank 2. The scan tool will a high value for a large amount of long term fuel correction, and 0% for no long term fuel trim correction. The scan tool will display a negative value when fuel system is running too rich and fuel is being removed from the combustion event. The scan tool will display a positive value if the fuel system is running lean and fuel is being added to the combustion event.