Fiat DUCATO 2.3 JTD 16V fino a 02/05 – ADDITIONAL HEATER – – WIRING DIAGRAM, LOCATION COMPONENTS, OPERATIONAL DESCRIPTION – WIRING DIAGRAM, LOCATION COMPONENTS, OPERATIONAL DESCRIPTION

Wiring Diagram - ADDITIONAL HEATER - Fiat DUCATO 2.3 JTD 16V fino a 02/05

ADDITIONAL HEATER WIRING DIAGRAM Fiat DUCATO 2.3 JTD 16V fino a 02/05

Components - ADDITIONAL HEATER - Fiat DUCATO 2.3 JTD 16V fino a 02/05

Component code	Description	Reference to the assembly
B002	JUNCTION UNIT UNDER DASHBOARD	-
B099	MAXI FUSE BOX ON BATTERY	-
B101	OPTIONAL JUNCTION UNIT UNDER THE DASHBOARD	-
C010	LEFT FRONT EARTH	-
D001	FRONT/DASHBOARD COUPLING	-
D018	ADDITIONAL FRONT/DASHBOARD COUPLING	-
D022	COUPLING FOR ADDITIONAL HEATER	-
D097	SHORT CIRCUITING COUPLING	-
D160	DASHBOARD/OPTIONAL DASHBOARD COUPLING	-
H110	ADDITIONAL AIR CONDITIONING TEMPERATURE CONTROLS	-
I050	INERTIA SWITCH
K042	AIR TEMPERATURE SENSOR	-
K044	AIR PRESSURE - TEMPERATURE SENSOR	-
M075	ADDITIONAL HEATER CONTROL UNIT	-
N044	ADDITIONAL HEATER ELECTRIC PUMP	-
		-

Location Components - ADDITIONAL HEATER - Fiat DUCATO 2.3 JTD 16V fino a 02/05

ADDITIONAL HEATER LOCATION COMPONENTS Fiat DUCATO 2.3 JTD 16V fino a 02/05

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Component code	Description	Reference to the assembly
B002	JUNCTION UNIT UNDER DASHBOARD	-
B099	MAXI FUSE BOX ON BATTERY	-
B101	OPTIONAL JUNCTION UNIT UNDER THE DASHBOARD	-
C010	LEFT FRONT EARTH	-
D001	FRONT/DASHBOARD COUPLING	-
D018	ADDITIONAL FRONT/DASHBOARD COUPLING	-
D022	COUPLING FOR ADDITIONAL HEATER	-
D097	SHORT CIRCUITING COUPLING	-
D160	DASHBOARD/OPTIONAL DASHBOARD COUPLING	-
H110	ADDITIONAL AIR CONDITIONING TEMPERATURE CONTROLS	-
I050	INERTIA SWITCH
K042	AIR TEMPERATURE SENSOR	-
K044	AIR PRESSURE - TEMPERATURE SENSOR	-
M075	ADDITIONAL HEATER CONTROL UNIT	-
N044	ADDITIONAL HEATER ELECTRIC PUMP	-
		-

Description - ADDITIONAL HEATER - Fiat DUCATO 2.3 JTD 16V fino a 02/05

A Webasto "Thermo Top C that operates completely independently of the engine is available as an accessory.This device makes it possible to:heat the coolant and therefore the engine;heat the passenger compartment and thus defrost the windows.Device installation requires the heater unit to be connected to the engine cooling, fuel feed and vehicle electrical system interface systems.The system consists of:a heating unit that essentially consists of a diesel burner;an silencer for fuel combustion exhaust gases;a metering pump fitted on the fuel return pipe that delivers fuel to the burner;a heat exchanger, coaxial to the burner, connected via the vehicle coolant system;an output pipe from the metering pump to the metering device;an electronic control unit for controlling and regulating auxiliary heater system functions built into the heater unit;a digital timer for programming the heater activation time or for immediate manual activation.The power supply to the heater is protected by special fuses located in the optional junction unit under the instrument facia.

Operational Description - ADDITIONAL HEATER - Fiat DUCATO 2.3 JTD 16V fino a 02/05

Webasto control unit M075 receives a power supply directly from the battery supplied by programming device H110, supplied in turn by a line protected by fuse F58 located in optional junction unit B101.The heater pump is ignition-operated and fully managed by control unit M075 or device H110. The ignition-operated supply is governed by relay T24, also housed in optional junction unit B101. The relay is "normally closed" type; i.e. relay pins 30 and 87 are short-circuited at rest. When inertia switch I050 cuts in, the earth reference at pin 86 is no longer present. Under these conditions, the coil is no longer excited and the internal relay contact opens. Under these conditions, the pump of heater N044 is no longer supplied from the battery. This strategy is used as a precaution to prevent or at least reduce the risk of fire in the case of accidents.Sensor K042 supplies control unit M075 with external air temperature readings that are used to ensure correct heater system operation.Control unit M075 supplies the supplementary heater motors, where present in the vehicle, from pin F to provide a direct power supply from the battery via shunt J035.