SEAT Workshop Service and Repair Manuals > Leon Mk1 > Power unit | 4LV Injection and Ignition System | Mixture preparation system, electronic inj.,Gas

Test with engine leak detector spray G 001 800 A1

Test with engine leak detector spray -G 001 800 A1-

Special tools and workshop equipment required

t	Fault reader -V.A.G 1551- or vehicle system tester -V.A.G 1552- with cable -V.A.G 1551/3B-

t	Leak detector spray -G 001 800 A1-

Test conditions

l	Coolant temperature must be at least 80 °C → display group 1, display field 2.

Test sequence

Note!

t	The vacuum in the intake system will cause the leak detector spray to be drawn in with the unmetered air. The leak detector spray reduces the flammability of the mixture. This leads to a drop in engine speed and to a change of Lambda probe reading.

t	The safety precautions listed on the container must be adhered to.

–	Connect fault reader -V.A.G 1551/V.A.G 1552-. Start engine and enter “Address code” 01 to select engine control unit. (Fault reader: Connecting and selecting the engine control unit → Chapter).

Indicated on display:

–	Press keys 0 and 8 for the function “Read measured value block” and confirm entry with Q -key.

Rapid data transfer                 HELP

Select function XX

Indicated on display:

–	Press keys 0,3 and 3 for “Display group number 33” and confirm entry with Q key.

Read measured value block           HELP

Input display group number XXX

Indicated on display: (1...2 = Display fields)

–	Observe Lambda probe voltage in display field 2.

–	Systematically spray parts of the intake system with engine leak detector spray.

If the engine speed drops or the Lambda probe voltage changes:

–	Press → -key.

–	Press keys 0 and 6 for the “End output” function and confirm input with the Q -key.

–	Switch off ignition.

–	Check sprayed areas of intake system for leaks and rectify if necessary.

Engine speed or Lambda probe voltage does not change:

–	Press → -key.

–	Press keys 0 and 6 for the “End output” function and confirm input with the Q -key.

–	Switch off ignition.

Read measured value block          33 ->

1                   2

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