Description and Operation
Engine management for null (liquefied petroleum gas) operation is performed through an independent control circuit which uses some signals from the engine management system for petrol operation.
These are the signals:
- of the null (heated oxygen sensor),
- of the null (crankshaft position)sensor,
- of the null (manifold absolute pressure and temperature)sensor,
- of the 4 fuel injectors for gasoline operation, and
- of the ignition switch.
Further information is sent to the gas control module via the null (controller area network) bus.
The gas control module operates the fuel shut-off valves and controls a gas solenoid valve for each cylinder. To do this it uses the map for petrol operation and adapts the time of injection and its duration.
Repair and maintenance instructions
NOTE: The most up-to-date Sequent Plug&Drive autogas (LPG) / natural gas (CNG) diagnostic and programming software should always be used for diagnosis and programming of the gas control module.
After replacement, the gas control module needs to be configured with the aid of the Sequent Plug&Drive autogas (LPG) / natural gas (CNG) diagnostic and programming software.
The engine wiring harnesses for null and petrol operation are linked. If one of the wiring harnesses is changed, this connection must be reproduced.