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

EGR Throttle Valve Solenoid

Engine Output Controls

Activates the exhaust gas recirculation (EGR) throttle valve solenoid ON or OFF. The Device Control will not change unless changed or cancelled by the scan tool.

EGR Solenoid

Engine Output Controls / EGR System

Activates the EGR control solenoid in 10 percent increments from 0-100 percent. The Device Control will not change unless changed or cancelled by the scan tool.

EGR System Seal

Engine Output Controls / EGR System

Activates the EGR vent solenoid Not Venting. Commands the EGR Solenoid to 0 %. This seals the EGR vacuum system. The Device Control will not change unless changed or cancelled by the scan tool.

EGR Vent

Engine Output Controls / EGR System

Activates the EGR vent solenoid ON or OFF. The Device Control will not change unless changed or cancelled by the scan tool.

Fuel Pressure Control

Engine Output Controls

Activates the Fuel Pressure Regulator in 10 percent increments from 0-100 percent. The Device Control will not change unless changed or cancelled by the scan tool.

Fuel Pump

Engine Output Controls

Activates the fuel transfer pump ON or OFF. The Device Control will not change unless changed or cancelled by the scan tool.

FRP Regulator Relay

Engine Output Controls

Activates the FRP Regulator Relay, ignition 1 relay ON or OFF. The Device Control will not change unless changed or cancelled by the scan tool. DTC U1800 may set when turning the relay OFF.

Glow Plug

Engine Output Controls

Activates the Glow Plug Relay ignition 1 relay 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.

Intake Air Heater

Engine Output Controls

Activates the intake air heater relay ON or OFF. The Device Control will not change unless changed or cancelled by the scan tool.

Malfunction Indicator Lamp

Engine Output Controls

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

RPM Control

Fuel System

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