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Home >> Volkswagen >> 2004 >> GTI VR6 >> Repair and Diagnosis >> External Pages >> Different car >> Section 102 (1.9L - Fuel Injection Glow Plug, Engine Code: ALH (A4 Platform)) >> 01 On Board Diagnostic (OBD) >> Function 03: Output Diagnostic Test Mode (DTM) >> Output Diagnostic Test Mode, performing >> Activate Glow Plug Relay J52

Activate Glow Plug Relay J52

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Indicated on display:

Output Diagnostic Test Mode ->
Glow Plug Relay J52

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:

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