SEAT Workshop Service and Repair Manuals

Checking the gas system (LPG) The inspection of the autogas system (LPG) must be performed on a regular basis and, is an independent component from the inspection service, can also be carried out separately for this first time after 3 years at the latest and then every 2 years. It can also be carried out in a specialist workshop approved for this purpose. After completing repair work on the autogas system, after an accident or damage to the vehicle caused by fire, the system should also undergo an inspection.   WARNING t  The inspection of the system must only be performed by specifically trained technical experts that have to refresh their knowledge on a regular basis. t  Autogas is highly flammable and when mixed with oxygen, generates an explosive mixture. t  No source of ignition must be located in the vicinity of the gas system. t  Breathing in LPG can influence your ability of perception and cause damage to your lungs. There is a risk of suffocation due to lack of oxygen with higher concentrations. t  LPG is not odourless as odour intensive substances have been mixed into it. Check the tool and equipment equivalence table according to the applicability between Seat / VW / Audi / Skoda → Chapter Special tools and workshop equipment required

t  Gas leak detector -VAS 6227- Pre-requirement for the inspection l  Fuel tank must be filled to 50% (legal guideline). l  The access to all positions of the autogas system to be checked must be guaranteed. l  No fault must be recorded in the autogas system controller. l  Workplace without draught   Note Take greater care for an increased organised work and cleanliness when working on the autogas system. Component identification When identifying the components, a check must be made as to which ECE standard approval the tanks have. visual inspection –  Check the autogas system for damage, corrosion and the correct fastening. Function check:

Altea, Altea XL 2009► –  Start the engine and take a look at the central console to see if the engine is running in gas or petrol mode. If the gas mode is being operated, the diode „ON“-1- lights up.

Leon 2009► –  Start the engine and take a look at the central console to see if the engine is running in gas or petrol mode. If the gas mode is being operated, the diode „ON“-1- lights up.   Note The engine always starts in petrol mode. The engine swaps to gas mode automatically when it was located in this operating mode the last time the engine was turned off. A pre-requirement for this is that the engine has a temperature of 30°C and the engine has reached a speed of at least 1,200 rpm. Leak test –  Turn on the ignition for the purpose of bringing the pressure conditions of the LPG system to its operating condition. The ignition can be turned back off for performing the leak test. –  Remove the protective cover of the autogas tank in the spare wheel well according to the following description:

–  Unscrew both hexagon bolts -1- and remove the protective cover -2-. –  Using the Gas leak detector -VAS 6227-, now check if there are any leaks.   Note All screw connections of the autogas system must be checked. The result is only assessed as positive when the green LED on the Gas leak detector for natural gas operated vehicles -VAS 6227- lights up. If the yellow or red LED lights up, the leak must be eliminated (perform the repair) and the gas system must be checked for leaks again. If a different Gas leak detector -VAS 6227- is used, the 50 ppm limit must not be exceeded.   Note

t  As liquid gas has a higher density than air, it always tends to sink. For this reason, the check must first be performed in the area under the thread connection at two points that are approx. 90° away from each other. t  Then both points above the screw connection must be checked or one has to move the measuring tip of the test gauge slowly around the screw connection. Checking position

t  Fill connection area in the wheel housing (measure the total concentration; if it is „not correct“, the wheel housing must be removed and the measurement must be target orientated repeated).

t  Tank shut-off valve in the spare wheel well

t  Evaporator -1- with the screw connection -2, 3 and 4-.

t  Screw connection -arrows- of the fuel filter -1-.

t  Connections -A and B- of the injectors / Rail.