Scan Tool Output Control | Additional Menu Selection(s) | Description | ||||||||||||||
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A/C Relay | Engine Output Controls | Activates the A/C compressor relay. The normal commanded state of the A/C relay is NONE. The relay status can also be monitored on the scan tool data parameter A/C Relay Command. The powertrain control module (PCM) will inhibit the operation of the A/C relay when the ambient air temperature is low enough to cause icing of the evaporator core. | ||||||||||||||
EGR Solenoid | Engine Output Controls | Activates the EGR valve. The normal commanded state is NONE. When commanded ON, the EGR valve position is commanded in 10 percent duty cycle increments.
The valve remains in the commanded state until cancelled by the scan tool or until vehicle speed is detected. | ||||||||||||||
Engine Speed Control | Throttle Control System | Activates the throttle actuator control (TAC) motor in order to change engine speed. The normal commanded state is a 9-14 percent throttle plate opening. The PCM allows engine speed control when the following conditions are met:
The system will INCREASE or DECREASE the engine speed from 500-2,000 RPM. The system remains in the commanded state until cancelled by the scan tool or when vehicle speed is detected. | ||||||||||||||
EVAP Purge Solenoid | Engine Output Controls / EVAP System | Activates the EVAP canister purge valve. The normal commanded state is NONE. The solenoid is commanded ON in 10 percent increments, with a maximum scan tool command of 20 percent duty cycle. The solenoid remains in the commanded state until cancelled by the scan tool or until vehicle speed is detected. | ||||||||||||||
EVAP Vent Solenoid | Engine 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 solenoid remains in the commanded state until cancelled by the tool or until vehicle speed is detected. | ||||||||||||||
EVAP Purge/Seal | Engine Output Controls / EVAP System | Activates the EVAP purge and vent solenoids. The normal commanded state is NONE. When INCREASE is selected the following commands are executed:
The purge solenoid will remain ON until cancelled or the FTP sensor detects a negative pressure greater than -23.45 mm Hg (-12.50 in H2O). When SEAL is selected the following commands are executed:
The system remains in the commanded state until cancelled by the scan tool or until vehicle speed is detected. | ||||||||||||||
Fan Relay 1 | Engine Output Controls / Fan Relays | Operates both engine cooling fans at low speed by enabling fan relay 1. The normal commanded state of the relay is NONE. The PCM allows relay control when the following conditions are met:
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Fan Relay 2 | Engine Output Controls / Fan Relays | This function operates both engine cooling fans at high speed by enabling all three cooling fan relays. The normal commanded state of the relay is NONE. The PCM allows relay control when the following conditions are met:
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Fuel Injector Flow Test | Fuel System | This function activates the selected fuel injector in order to verify the correct fuel injector flow. The ECM commands the fuel pump ON when the test is initiated and pulses the selected fuel injector on the second prompt. The normal commanded state is None. The scan tool initiates the test when the following conditions are met:
If any fuel injector needs to be tested again, the engine must be started and idled for 30 seconds. | ||||||||||||||
Fuel Pump | Fuel System | This function controls the fuel pump relay. The normal commanded state is NONE.
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HO2S Bank 1 Sensor 1 Heater | Engine Output Controls / HO2S Heater Controls | This function controls the selected HO2S heater control circuit. The normal commanded state is NONE. The system will command ON the heater for 1 second. In order to repeat the test, the ignition switch must be cycled On to Off, wait 5 seconds, then back to On. The PCM allows heater control when the following conditions are met:
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HO2S Bank 1 Sensor 2 Heater | Engine Output Controls / HO2S Heater Controls | This function controls the selected HO2S heater control circuit. The normal commanded state is NONE. The system will command ON the heater for 1 second. In order to repeat the test, the ignition switch must be cycled On to Off, wait 5 seconds, then back to On. The PCM allows heater control when the following conditions are met:
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HO2S Bank 2 Sensor 1 Heater | Engine Output Controls / HO2S Heater Controls | This function controls the selected HO2S heater control circuit. The normal commanded state is NONE. The system will command ON the heater for 1 second. In order to repeat the test, the ignition switch must be cycled On to Off, wait 5 seconds, then back to On. The PCM allows heater control when the following conditions are met:
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HO2S Bank 2 Sensor 2 Heater | Engine Output Controls / HO2S Heater Controls | This function controls the selected HO2S heater control circuit. The normal commanded state is NONE. The system will command ON the heater for 1 second. In order to repeat the test, the ignition switch must be cycled On to Off, wait 5 seconds, then back to On. The PCM allows heater control when the following conditions are met:
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Intake Rocker Arm Actuator Solenoid | Engine Output Controls | Activates the rocker arm oil control solenoid valve. The normal commanded state of the rocker arm oil control solenoid is NONE. When commanded ON, the rocker arm oil control solenoid opens the oil passage to the rocker arm assemblies. The PCM allows solenoid control when the following conditions are met:
The solenoid remains in the commanded state until any of the following conditions occur:
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Reset TPS Learn Value | Throttle Control System | This function commands the PCM to set the TPS Learned Value in the control module to zero percent. The PCM accepts a TPS learned value reset command when the following conditions are met:
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Throttle Actuator Control | Throttle Control System | This function controls the throttle plate position in 1 percent increments. The PCM allows TAC motor control when the following conditions are met:
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TAC Module Power Inhibit | Throttle Control System | This function commands the throttle plate to the power inhibit position for approximately 2 seconds. The PCM sets the TAC motor to the power inhibit position when the following conditions are met:
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