AFO Enable

Engine Output Controls

Activates the AFO Enable Circuit. Device control is inhibited if the engine is running.

Forced Fuel Switch Over

Engine Output Controls

Disables alternative fuel operation. Device control is inhibited if the engine is running on gasoline.

Fuel Gage

Engine Output Controls

Activates the CNG fuel level output circuit in 10% increments up to 100% full. Fuel gage operation can only be observed while the engine is operating in the Alt. Fuel mode.

Fuel Gage Relay

Engine Output Controls

Activates the fuel gage relay. The fuel gage relay is ON while operating on Alt. Fuels.

Fuel Mode Indicator Lamp

Engine Output Controls

Activates the Fuel Mode Indicator lamp. The lamp will remain ON or OFF until cancelled by the scan tool.

Fuel Pump

Engine Output Controls

Activates the AF Fuel Pump Relay and the gasoline fuel pump. Commanding the fuel pump OFF while the engine is running will cause the engine to stall.

Fuel Trim Reset

Fuel System

Activates the reset of CNG fuel trim data in all fuel trim cells.

High Pressure Lock-off

Engine Output Controls

Activates the high pressure lock-off (HPL) solenoid. Control is allowed only when the engine is running. Commanding the HPL OFF while operating on CNG will cause a switch-over to gasoline operation.

Low Pressure Lock-off

Engine Output Controls

Activates the low pressure lock-off (LPL) solenoid. Control is allowed only when the engine is running. Commanding the LPL OFF while operating on CNG will cause the engine to stall.

Malfunction Indicator Lamp

Engine Output Controls

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

Mixture Control Valve

Engine Output Controls

Activates the mixture control valve in 10% increments up to 100%. Device control is inhibited if the engine is running.

¹For gasoline control module information refer to Scan Tool Output Controls in the J Platform Service Manual.