User Manual

Chapter 13
BOSCH HDI EDC 15C2 INJECTION SYSTEM AND PARTICLE FILTER
129
D - FUEL ADDITIVE FUNCTION - OPERATION IN DOWNGRADED MODES
3 main strategies are used if the additive system develops a fault.
Fuel filler cap fault:
The additive ECU uses the vehicle speed information in conjunction with the fuel
sender information to inject the additive.
Fuel sender fault:
The additive ECU adds an amount of additive equal to that added for a full tank
when the fuel filler cap is opened/closed.
Communications fault on the VAN multiplexed network:
The additive ECU adds an amount of additive equal to that added for a full tank
when communications are interrupted for more than 10 seconds.
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