GM Service Manual Online
For 1990-2009 cars only

Scan Tool Output Control

Additional Menu Selection(s)

Description

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.

EGR Solenoid

Engine Output Controls

Activates the exhaust gas recirculation (EGR) solenoid ON or OFF. The EGR position is limited to 30 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.

Fuel Pressure Control

Fuel System

Changes the Fuel Pressure in 10 MPa increments from 25-160 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.

Glow Plug

Engine Output Controls

Activates the Glow Plug Controller ON or OFF. The Device Control will be aborted after 12 seconds for the first activation, and after 5 seconds for every other activation. Device control is inhibited if the engine is running.

Injector Flow Rate Programming

Fuel System

Allows the technician to change the fuel injector calibration in the ECM and GPCM. Refer to Fuel Injector Flow Rate Programming for procedure.

Intake Air Heater

Engine Output Controls

Commands the Intake Air Heater ON or OFF. The Device Control will be aborted after 12 seconds for the first activation, and after 5 seconds for every other activation. Device control is inhibited if the engine is running.

Malfunction Indicator Lamp

Engine 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.

RPM Control

Fuel System

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.

TC Learn

Engine Output Controls

Allows the ECM to learn the current TC vane position.

TC Vane Position Sensor

Engine Output Controls

Adjusts the turbocharger vane position in 10 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

Engine Output Controls

Cycles the turbocharger vane position solenoid to 95 percent boost and back to 0 percent boost. The device control is limited to engine speeds less than 2,000 RPM and will be disabled if DTC P0045 is set.