Intake Air System, Checking

Intake Air System, Checking

Special tools, testers and auxiliary items required

• (VAS5051) with (VAS5051/1)

• Engine leak detector spray G 001 800 A1

• 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 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 testing and information system (VAS5051 ). Refer to => [ VAS 5051, Connecting and Select Functions ] VAS 5051, Connecting and Select Functions and select vehicle system "01 -Engine electronics" in selection. Engine must be running at idling speed.

Display on (VAS5051):





- Under - 1 - select diagnostic function "08 - Read measured value block".

Display on (VAS5051):





1. Enter display group max. input value = 255

- Enter "001" for "display group number 001" in zone - 2 - and confirm entry by pressing Q button.

Display on (VAS5051):





- Note engine speed in display zone - 1 -.

- Systematically spray parts of intake system with engine leak detector spray.

If engine speed drops:

- Check sprayed areas of intake system for leaks and repair if necessary.

- Exit function "08 - Read measured value block" by pressing arrow button.

Display on (VAS5051):





- Under - 1 - select diagnostic function "06 - End output".

- Switch ignition off.