Skoda Workshop Service and Repair Manuals > Octavia Mk2 > Power unit | 1,6/72; 75 kW MPI engine | Self diagnosis, V.A.G Inspection Service | Self diagnosis, safety measures, cleanliness regulations, directions | Connecting the diagnostic unit, interrogating and erasing the fault memory of the liquefied petroleum gas system (LPG) | Connecting the diagnostic unit, interrogating and erasing the fault memory of the liquefied petroleum gas control unit (LPG)

Erasing the fault memory of the liquefied petroleum gas control unit (LPG) > < Connecting the diagnostic unit, interrogating and erasing the fault memory of the liquefied petroleum gas system (LPG)

Connecting the diagnostic unit, interrogating and erasing the fault memory of the liquefied petroleum gas control unit (LPG)

For vehicles manufactured up to 12.2010 (exhaust emission standard EU-4)

Special tools and workshop equipment required

t	Diagnostic software on CD - Bi-fuel -JNV 910 787-

t	Diagnostic cable for liquefied petroleum gas control unit LPG -JNV 971 603 -

t	Vehicle diagnosis, measurement and information system -VAS 505X- or a notebook

Caution

The liquefied petroleum gas control unit LPG can be damaged when improperly using different functions of the diagnostic program as described below.

Note

t	The diagnostic software on CD -JNV 910 787- must subsequently be installed in -VAS 505X-, if necessary in a commercially available notebook.

t	The diagnostic connector for the liquefied petroleum gas control unit is located in the engine compartment, namely in the area of the battery, behind which the liquefied petroleum gas control unit (LPG) can also be found.

t	In order to reach the diagnostic connector and the liquefied petroleum gas control unit (LPG), the battery cover must be removed. After the diagnosis is performed, place the connector again in the area of the battery.

t	The fault memory of the liquefied petroleum gas control unit (LPG) can only be interrogated while the engine is running. When the ignition is switched on (engine stoppage), a connection with the liquefied petroleum gas control unit (LPG) cannot be established.

Precondition

l	running engine

–	Connect the diagnostic cable for liquefied petroleum gas control unit LPG -JNV 971 603 - to the diagnostic connector -arrow- for the liquefied petroleum gas control unit and to the diagnostic unit -VAS 505X- or to a notebook. First of all, the connector cover must be removed.

Note

A switch-over into the gas mode can take place after the engine temperature has risen above 30 °C and the engine speed has exceeded 1201 rpm.

–	Start engine and change fuel selector switch -E395- to gas mode -arrow A-. When in gas mode, the warning light „ON“-arrow B- lights up on the fuel selector switch -E395-.

–	Start the diagnostic program „Bi-fuel“.

–	Select the relevant status number when starting the diagnostic program „Bi-fuel“:

I: Program status number VW202041G24

II: Program status number VW202043G34

The status number of the diagnostic program is indicated in the field -arrow C- after the start.

–	Select the corresponding language version for the operation of the program -arrow A-.

–	Press F3-arrow D-, in order to establish a connection with the liquefied petroleum gas control unit (LPG).

The field -arrow B- indicates that the connection was established.

–

Press F6.

–	Restart the diagnostic program via the button -arrow-.

The program field indicates the list of the system components which are subject to the diagnosis:

t	Valve for gas tank -N495-

t	Gas distribution line sensor (pressure) -G401-

t	Intake manifold pressure sender -G71-

t	Gas distribution line sensor (temperature) -G401-

t	Coolant temperature sender -G62-

t	Sender for gas level indicator -G707-

t	Gas inlet valve -N366…N369 -

t	Injector -N30…N33 -

t	Control unit for gas mode -J659-

t	Lambda probe -G39-

t	Control unit for gas mode (injector) -J659-

If there is no fault, close the diagnostic window with X.

–	End the diagnostic program by pressing the F10 button → Anchor, or the F9 button → Anchor.

If there is a fault, proceed as follows:

–	Start the fault list via the button -arrow-.

–	Inspect wiring and plug connections according to the current flow diagram, if necessary repair or replace the defective component, while doing so observe safety measures and other rules → Chapter.

–	Erase the fault memory after a repair → Chapter.

Power unit
1,6/72; 75 kW MPI engine
Self diagnosis, V.A.G Inspection Service / Self diagnosis, safety measures, cleanliness regulations, directions / nnecting_the_diagnostic_unit_interrogating_and_erasing_the_fault_memory_of_the_liquefied_petroleum_gas_system_(lpg)/">Connecting the diagnostic unit, interrogating and erasing the fault memory of the liquefied petroleum gas system (LPG)
Connecting the diagnostic unit, interrogating and erasing the fault memory of the liquefied petroleum gas control unit (LPG)

Erasing the fault memory of the liquefied petroleum gas control unit (LPG) > < Connecting the diagnostic unit, interrogating and erasing the fault memory of the liquefied petroleum gas system (LPG)