Audi Workshop Service and Repair Manuals > A3 Mk1 > Power unit | 4-Cylinder engine (5-valve), Mechanics | Engine cylinder head, valve gear | Testing camshaft timing control | Testing system: engines with engine code letters APG

4-Cylinder engine (5-valve), Mechanics

Testing camshaft timing control

Testing system: engines with engine code letters APG

Special tools and workshop equipment required

Requirements for test:

● Connect vehicle diagnosis, testing and information system VAS 5051, select "Vehicle self-diagnosis" and vehicle system "01 - Engine electronics".
● Engine idling.

Test sequence

→ Display on VAS 5051:


	Display zones
	1	2	3	4
Display Group 094: Camshaft timing control
Display	xxxx/min	---	---
Indicates	Engine speed, rpm	Camshaft timing control	Diagnostic status
Operating range		CS-ctrlOFF CS-ctrlON	Test OFF Test ON Syst. OK Syst.n.OK
Specification	660...860 rpm	CS-ctrlOFF	Syst. OK
Note			If display shows "Syst.n.OK": interrogate fault memory

Audi Workshop Service and Repair Manuals