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Home >> Volkswagen >> 2005 >> Jetta TDI, Automatic >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 9 (1.9L - Fuel Injection Glow Plug, Engine Code ALH, From My 2002 (A4 Platform)) >> 01 On Board Diagnostic (OBD) >> Function 03: Output Diagnostic Test Mode (DTM) >> Performing Output Diagnostic Test Mode >> Activate Glow Plug Relay J52 :

Activate Glow Plug Relay J52 :

WARNING: This page is about a different variant/trim than selected.

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:

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