GM Service Manual Online
For 1990-2009 cars only

Scan Tool Output Control

Additional Menu Selection(s)

Description

Balance Rate Monitor

Fuel System

This function will allow actual balance rate values to be displayed.

Cylinder Power Balance

Fuel System

Disables each fuel injector. Device Control can be changed at any engine or vehicle speed. The device control will not change unless changed or cancelled by the scan tool.

DPF Regeneration Enable

Exh.

This function enables a DPF Regen when the vehicle meets the conditions for running. This function will by-pass the normal soot model, so the next time the vehicle is under the conditions for an active regeneration to take place, the ECM will go ahead and initiate the regeneration event.

DPF Reset Replace DPF

Output Controls

Resets all DPF parameters to zero.

DPF Service Regeneration

Exh.

This function enables a DPF Regen. The engine coolant must be greater than 70-115°C (158-239°F). Vehicle must be in Park. Ambient temperature must be greater than -30°C (-22°F). Brake pedal and accelerator must be in the released position. The scan tool will display all inhibit reasons. The scan tool must remain connected until test is complete. This function takes approximately 35 minutes to complete. During this procedure the RPM will slowly increase to 2,500 RPM and remain there for approximately 25 minutes.

EGR Solenoid

Output Controls

Activates the exhaust gas recirculation (EGR) solenoid ON or OFF. The EGR position is limited to 40 percent duty cycle, which is 100 percent commanded open valve. The device control is limited to 10 seconds ON, with a 10 second OFF cooling time. This device control is disabled by DTC P0403.

Engine Speed Control

Special Functions/Engine Speed/Throttle

Adjusts the engine speed in 25, 100, or 500 RPM increments between 600-1500 RPM. The Device Control will not change unless changed or cancelled by the scan tool.

Fuel Pressure Control

Fuel System

Changes the Fuel Pressure in 5 MPa increments from 30-160 MPa. The Device Control will not change unless changed or cancelled by the scan tool. This device control is disabled if any of the following conditions are met:

    • Engine speed is more than 2500 RPM.
    • Vehicle Speed is more than 40 km/h (25 mph).

Fuel Pump

Engine Output Controls

Activates the fuel transfer pump or prime pump (depending on application) ON or OFF. The Device Control will not change unless changed or cancelled by the scan tool.

Fuel Transfer Pump Relay

Fuel System

This function commands the fuel transfer pump relay ON/OFF.

IAF Valve Motor

Ind.

This function increases or decreases the position of the IAF valve.

Malfunction Indicator Lamp

Output Controls

Activates the malfunction indicator lamp (MIL). The MIL will remain illuminated until cancelled by the scan tool.

Pilot Injector Balance Procedure

Fuel System

Disables each fuel injector pilot injection. Device Control can be changed at any engine or vehicle speed. The device control will not change unless changed or cancelled by the scan tool.

TC Vane Position Sensor

Output Controls

Adjusts the turbocharger vane position in 5 percent increments from 0-100 percent. The device control will be aborted if engine speed is above idle or if the coolant temperature is too cold.

TC Vane Solenoid

Output Controls

Cycles the turbocharger vane position solenoid to 100 percent boost and back to 0 percent boost. The device control is limited to engine speeds less than 1,500 RPM and will be disabled if DTC P0045 is set.