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Home >> Cadillac Truck >> 2005 >> SRX AWD V8-4.6L VIN A >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Testing and Inspection >> Scan Tool Testing and Procedures >> Scan Tool Data, Normal Values and Definitions >> Scan Tool Data Definitions - Powertrain Systems >> Scan Tool Data Definitions Part 2

Scan Tool Data Definitions Part 2



Scan Tool Data Definition Part 2


SCAN TOOL DATA DEFINITIONS

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.

Loop Status: This parameter indicates the status of the fuel delivery by the control module. The scan tool will display Closed Loop if the control module is controlling the fuel delivery according to the heated oxygen sensor (HO2S ) voltages. The scan tool will display Open Loop if the control module controls fuel delivery based on throttle position, coolant temperature, and air flow inputs only. The vehicle will run in open loop until all of the conditions are met to allow Closed Loop operation.

MAF Sensor: This parameter indicates the quantity calculated by the control module based on a signal from the Mass Airflow (MAF) Sensor. The scan tool will display a high value at high engine speeds, and a low value at low engine speeds.

MAF Sensor: This parameter indicates the frequency signal received from the mass airflow (MAF) sensor by the control module. The scan tool will display a high value at high engine speeds, and a low value at low engine speeds.

MAP Sensor: This parameter indicates the manifold absolute pressure inside the engine as calculated by the control module based on the signal from the manifold absolute pressure (MAP) sensor. The scan tool will display a higher value wide open throttle, and a lower value at idle.

MIL Circuit Status: This parameter displays the diagnostic state of the output driver for the malfunction indicator lamp 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.

MIL Command: This parameter displays the commanded state of the malfunction indicator lamp (MIL) control circuit. The malfunction indicator lamp should be on when the scan tool indicates the MIL Command is On. The malfunction indicator lamp should be off when the scan tool indicates the MIL Command is Off. The control module will command the MIL On when the ignition is ON with the engine OFF in order to perform a bulb check.

MIL Requested by DTC: This parameter indicates the reason the control module illuminated the MIL. The scan tool will display YES when the MIL is requested as a result of an A or B type DTC. The scan tool will display NO if the MIL is illuminated for another reason, such as transmission DTCs.

Mileage Since DTC Cleared: This parameter displays the mileage accumulated since an emission diagnostic trouble code was cleared. The scan tool will display increasing mileage as the vehicle is driven.

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