| Diverting fuel (for auxiliary heater) from fuel tank |
WARNING | Observe the applicable rules for cleanliness, take the appropriate precautions and heed the relevant safety measures when working on open fuel systems. → Fuel supply system; Rep. Gr.20 |
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| Vehicles with no auxiliary heater are fitted with a fuel delivery unit with no additional connection for “auxiliary heater” fuel diversion and with no suction pipe in the fuel tank → Parts List. |
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| If the fuel diversion pipe has not been properly routed in the fuel tank, auxiliary heater operating problems may be encountered if the fuel tank is not completely full (fault message “No flame formation” or “Repeated flame interruption”). |
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| If the metering pump conveys gas bubbles instead of liquid fuel to the auxiliary heater (e.g. when braking or accelerating front-wheel drive vehicles manufactured up to 01.03 and with fuel tank only 1/4 full), combustion problems will occur and intense smoke will emerge from the auxiliary heater exhaust pipe → Chapter. |
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| To prevent the fuel tank becoming completely empty in auxiliary heating mode, the auxiliary heater is no longer activated by the control unit in dash panel insert -J285- if the fuel gauge is in the “red zone”. |
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