Volkswagen Workshop Service and Repair Manuals

Checking with engine leak detector spray G 001 800 A1

Special tools, testers and auxiliary items

• ◆ Fault reader V.A.G 1551 or vehicle system tester V.A.G 1552 with cable V.A.G 1551/3
• ◆ Engine leak detector spray G 001 800 A1

Notes:

• ◆ The vacuum in the intake system will cause the leak detector spray to be drawn in with the outside air. The leak detector spray reduces the ignitability of the mixture. This leads to a drop in engine speed and to a significant increase of the CO content.
• ◆ The safety precautions listed on the container must be adhered to.

Test sequence

• ‒ Connect fault reader V.A.G 1551 (V.A.G 1552) and select engine electronics control unit with the "Address word" 01. When doing this the engine must be running at idling speed.
  (Connecting fault reader and selecting engine electronics control unit .)

• ‒ Press keys 0 and 8 for the function "Read measured value block" and confirm entry with Q key.

• ‒ Press keys 0 and 1 for "Display group number 01" and confirm entry with Q key.

• ‒ Note engine speed in display zone 1.
• ‒ Note Lambda probe voltage in display zone 3 and the area it fluctuates in.
• ‒ Systematically spray parts of the intake system with engine leak detector spray.

Engine speed or Lambda probe voltage does not change:

• ‒ Press the ⇒key.
• ‒ Press keys 0 and 6 for the function "End output" and confirm entry with the Q key.

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

• ‒ Press the ⇒key.
• ‒ Press keys 0 and 6 for the function "End output" and confirm entry with the Q key.
• ‒ Check sprayed areas of intake system for leaks and rectify if necessary.