6-26 SPECIAL INSTRUCTIONS FOR -SCR- EXHAUST SYSTEMS E UROCARGO Euro 4/5 OBD 1--- Stage 2 6.7 OBD 1 - Stage 2 As of 1 October 2007, the Directive on emissions requires makers of industrial vehicles to provide for a reduction of engine performance if, during vehicle use, NOx emissions do not meet the requirements fixed by the standard. Therefore, in case of driving with the AdBlue tank empty (AdBlue level below doser minimum operation quantity), or other causes not allowing the vehicle to respect the NOx emissions prescribed by the standard, the engine will undergo a reduction in perform- ance (derating), signalled in advance by lighting up of the yellow OBD indicator on the instrument panel.
This decrease in performance is activated the first time the vehicle is brought to null speed and lasts until restoration of antipollution devices normal operating conditions, allowing the vehicle to again respect the NOx emissions (e.g. if the AdBlue tank is empty just refill it) and has no effect on the reliability of the vehicle. The on board control unit records (compulsory by law) these events so that they are also available for checks by the Police.
OBD 1 - Stage 2 Base - January 2008 Print 603.93.431 CONDITION CONSEQUENCE SYMBOL AdBlue remains approximately 10% below the tank capacity Driver notified (warning light flashes) YELLOW warning light 125201 Non-compliance with Nox values estab- lished in standards: • AdBlue tank empty • Dosing stopped • Any deviation greater than 50% of average AdBlue consumption AdBlue warning light comes on with con- tinuous light, reduction in engine per- formance and fault code stored for 400 days or 9600 hours of engine oper- ation