Volkswagen Workshop Service and Repair Manuals > Polo Mk3 > Power unit | Direct injection and glow plug system with distributor pump as of 10.99 | Self diagnosis, V.A.G Inspection Service | Final control diagnosis

Performing final control diagnosis

The final control diagnosis activates the following components in the stated sequence:

1. Commencement of injection valve -N108-

2. Exhaust gas recirculation valve -N18-

3. AC compressor shut-off function

4. Variable intake manifold flap change-over valve -N239-

5. Fuel shut-off valve -N109-

6. Glow plug relay -J52-

7. Glow period warning lamp -K29-

Vehicles with m-equipment only:

8. Low heat output relay -J359-

9. High heat output relay -J360-

Note

t	During final control diagnosis, the individual final controls will be activated for approx. 30 s, unless the next final control is selected by pressing the → key.

t	The ignition must be switched off before repeating the final control diagnosis.

Special tools and workshop equipment required

t	Fault reader -V.A.G 1551- or vehicle system tester -V.A.G 1552- with diagnosis cable -V.A.G 1551/3-

Test prerequisites

l	Fuses must be OK.

l	Strip fuses in fuse box/battery OK.

l	The battery voltage must be at least 11.5 V.

l	Earth connections between engine and body must be OK.

l	All electrical consumers, e.g. lights and rear window heating, must be switched off.

Procedure

–	Connect fault reader -V.A.G 1551- or vehicle system tester -V.A.G 1552- and select engine electronics control unit with “address word 01”. Engine must be idling. (Connecting fault reader -V.A.G 1551- and selecting engine electronics control unit → Chapter).

Indicated on display:

–	Operate fault reader -V.A.G 1551- taking into account the information on the display:

–	Press keys 0 and 3 for function “Final control diagnosis”.

Rapid data transfer                 HELP

Select function XX

Indicated on display:

Rapid data transfer                    Q

03-Final control diagnosis

Volkswagen Workshop Service and Repair Manuals