: Complete lookup systems for Diagnostic Trouble Codes (DTCs) alongside detailed component testing procedures.
The technician accessed the "Fuel Pressure Regulator (Rail Pressure Relief Valve)" test within the Top module. It specified that the regulator should hold 500 bar static for 2 minutes. The vehicle failed at 45 seconds. Replacing the rail pressure regulator (not the high-pressure pump, which many would have guessed) fixed the issue. autodata 348 top