Scan Tool Output Control | Additional Menu Selection(s) | Description | ||||||
|---|---|---|---|---|---|---|---|---|
AIR Pump Relay | AIR System | Activates the secondary air injection (AIR) solenoid relay and AIR pump relay. The normal commanded state of the relay is NONE. With the system commanded ON, the system remains ON for a maximum of 30 seconds. | ||||||
AIR Solenoid | AIR System | Enables and disables the AIR solenoid. | ||||||
AIR System | AIR System | Activates the AIR system by turning the AIR pump relay and AIR solenoid ON or OFF | ||||||
Cylinder Power Balance | Fuel System | Enables/Disables a cylinder by turning OFF the fuel injector to the cylinder. The fuel injector is normally enabled. The control module disables the fuel injector when the following conditions are met:
When the DISABLE is selected the control module turns the injector OFF for 30 seconds. During this period, the engine operates with a misfire. | ||||||
EGR Solenoid | Output Controls | Activates the exhaust gas recirculation (EGR) Solenoid that controls EGR valve position. The normal commanded state is NONE. The system will INCREASE or DECREASE the amount of valve opening by 10 percent increments within a range of 0-90 percent. The system remains in the commanded state until cancelled by the tool. If the engine is running, too much EGR will result in a rough idle and/or stalling. | ||||||
Engine Controls Ignition Relay | -- | This function activates the engine control (EC) ignition relay. The normal commanded state is NONE. When commanded ON or OFF, the engine control module (ECM) turns the relay ON or OFF. The system remains in the commanded state until cancelled by the scan tool | ||||||
Engine Speed Control | TAC System | Activates the idle air control (IAC) valve to change engine RPM. The normal commanded state is NONE. To enable the RPM control, all instruction on the scan tool must be completed. The system will INCREASE or DECREASE the engine speed. The SET STEP VALUE changes the engine speed by increments of 25 RPM, 100 RPM, and 500 RPM. The system remains in the commanded state until cancelled by the tool. | ||||||
EVAP Purge Solenoid | Output/Controls/EVAP System | Activates the EVAP Purge Valve. The normal commanded state is NONE. The system will INCREASE or DECREASE the amount of EVAP purge valve opening by 10 percent increments within a range of 0-100 percent. The system remains in the commanded state until cancelled by the tool or the fuel tank pressure exceeds 24 mm Hg (12 in H20). | ||||||
EVAP Service Bay Test | Service Bay Tests | Activates the Service Bay Test to verify the integrity of the EVAP System. The scan tool initiates the test when the following conditions are met:
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EVAP Purge/Seal | Output Controls/EVAP System | This control enables 2 functions. One function increases or decreases the amount of purge by changing the duty cycle of the purge valve and commanding the vent ON (non-venting). The normal commanded state of both valves is NONE. The system will INCREASE or DECREASE the amount of EVAP purge valve opening by 10 percent increments within a range of 0-100 percent. The second function seals the system after using the purge function to obtain a specific amount of fuel tank pressure (FTP). When activated the purge valve is commanded to 0 percent and the vent valve is commanded ON (non-venting). Both functions remain in the commanded state until cancelled by the tool or the FTP exceeds 24 mm Hg (12 in H20). | ||||||
EVAP Vent Solenoid | Output Controls/EVAP System | Activates the EVAP vent solenoid. The normal commanded state is NONE. When commanded ON, the vent valve switches to non-venting. The system remains in the commanded state unless one of the following conditions occurs:
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Fuel Pump Relay | Output Controls/Fuel Pump | Controls the fuel pump relay. The normal commanded state is NONE. When commanded ON/OFF, the PCM turns the fuel pump ON/OFF. If the engine is running, and the fuel pump is commanded OFF, the engine will stall. The system remains in the commanded state until cancelled by the scan tool. | ||||||
Fuel Trim Enable | Fuel System | Disables the control modules ability to learn new fuel trim parameters. The commanded states are NONE, ENABLED, DISABLED. The normal commanded state is NONE. The system remains in the commanded state until cancelled by the scan tool. | ||||||
Fuel Trim Reset | Fuel System | This function activates the reset of fuel trim data in all fuel trim cells. | ||||||
HO2S Heater Bank 1 Sensor 1 Command | Heated Oxygen Sensor | Activates the HO2S bank 1 sensor 1 heater. The commanded states include NONE, ON, and OFF. The normal commanded state is NONE. Commanding the HO2S bank 1 sensor 1 heater ON turns on the heater driver. The system remains in the commanded state until cancelled by the tool. | ||||||
HO2S Heater Bank 1 Sensor 2 Command | Heated Oxygen Sensor | Activates the HO2S bank 2 sensor 1 heater. The commanded states include NONE, ON, and OFF. The normal commanded state is NONE. Commanding the HO2S bank 2 sensor 1 heater ON turns on the heater driver. The system remains in the commanded state until cancelled by the tool. | ||||||
HO2S Heater Bank 2 Sensor 1 Command | Heated Oxygen Sensor | Activates the HO2S bank 1 sensor 2 heater. The commanded states include NONE, ON, and OFF. The normal commanded state is NONE. Commanding the HO2S bank 1 sensor 2 heater ON turns on the heater driver. The system remains in the commanded state until cancelled by the tool. | ||||||
Idle Spark | Output Controls/Spark | Disables and enables idle spark advance with the engine running. | ||||||
Loop Status | Output Controls | Controls the system loop status. The commanded states include NONE, OPEN, or CLOSED. The normal commanded state is NONE. When commanded OPEN or CLOSED, the system remains in the commanded state until cancelled by the scan tool. | ||||||
Malfunction Indicator Lamp | Output Controls | Controls the malfunction indicator lamp (MIL). The commanded states include NONE, ON, and OFF. When commanded ON or OFF, the system remains in the commanded state until cancelled by the scan tool. | ||||||
Misfire Graphic | Special Functions | Graphs the accumulated misfires occurring in each cylinder. The scan tool allows for a reset of the misfire graph. | ||||||
Spark Retard | Output Controls | Controls the amount of spark retard. The normal commanded state is NONE. The system will INCREASE or DECREASE the amount of spark retard by 1 degree increments within a range of 0-10 degrees maximum retard. The system remains in the commanded state until cancelled by the tool. | ||||||
Throttle Position | Special Functions/Engine Speed Throttle | This function opens the throttle plate in 10 percent increments. The scan tool initiates the test when the following conditions are met:
The system remains in the commanded state until cancelled by the scan tool. |
