Activate Glow Plug Relay J52 :

WARNING: This page does not describe the selected car, but rather 9 other vehicles, including 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.

Press → button.

Indicated on display:

Output Diagnostic Test Mode →
Glow plug relay -J52

Vehicles through MY → 2001

→ 01 ON BOARD DIAGNOSTIC (OBD)

Relay must click.

Switching relay on and off can also be observed by the brightening and dimming of the interior light as a result of glow plug power consumption.

If relay does not click:

Check glow plug relay: , Performing Output Diagnostic Test Mode

Vehicles from MY 2002 →

NOTE:

This engine has a Glow Period Control Module J370 installed. It is not possible to optically and acoustically check the activation, this is only possible by connecting a current pick-up clamp to the glow plug wiring. → Glow plugs, checking

Continued for all vehicles