Work sequence

WARNING: This page is about a different car, the 2006 Volkswagen Golf, 2005 Volkswagen Jetta, 2005 Volkswagen Golf, 2004 Volkswagen Jetta, and 2004 Volkswagen Golf. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Identifying Plug

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Remove plug - arrow -.

Fig 2: Identifying - Connect pressure tester VAS 5187

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Connect pressure tester VAS 5187 as shown.
Start engine and run at idling speed.
Connect Vehicle diagnosis, Testing and Information System VAS 5051 and select operating mode "Vehicle self-diagnosis". Then select engine control module with Address word "01".
Press diagnosis function "08-Read measured value block".
Enter display group "2" using number block and confirm entry with Q key.
Read engine idling speed in display zone 1.
Increase engine speed to 1500 rpm.
Observe pressure indicated on pressure gauge. Specification: min. 3.5 bar
Press ← key.
Press function "06-End output".
Switch off ignition.

If the specification is not obtained:

Replace tandem pump. Refer to Tandem pump, removing and installing

NOTE:

After removing pressure tester, tighten plug to 25 Nm. Always replace seal.