With Manufacturer's Scan Tool

Intake Air System For Leaks (Unmetered Air), Checking

Special tools and equipment







- VAS5051 with VAS5051/1
- Engine leak detector spray G 001 800 A1

NOTE:
- 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.
- Adhere to the safety precautions listed on the container.

Test sequence
- Connect testing and information system VAS5051 and select vehicle system "01 -Engine electronics". Engine must be running at idling speed. Connecting VAS 5051 Scan Tool

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 the 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 <- button.

Display on VAS5051:







- Under -1- select diagnostic function "06 - End output".
- Switch ignition off.