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Home >> Volkswagen >> 2001 >> Jetta GL, 2.0 S, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 78 (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 >> Activating EGR Vacuum Regulator Solenoid valve N18 :

Activating EGR Vacuum Regulator Solenoid valve N18 :

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Indicated on display:

Output Diagnostic Test Mode →
Exhaust Gas Regulator Valve -N18

Valve must click.

NOTE:
  • It is difficult to hear the valve click due to engine noise. Determine valve operation by feel (touch).

Valve does not click:

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