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Fiat MULTIPLA 1.9 JTD 8V da 09/03 – ADDITIONAL HEATER – – WIRING DIAGRAM, LOCATION COMPONENTS, OPERATIONAL DESCRIPTION – WIRING DIAGRAM, LOCATION COMPONENTS, OPERATIONAL DESCRIPTION

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Fiat MULTIPLA 1.9 JTD 8V da 09/03 – ADDITIONAL HEATER – – WIRING DIAGRAM, LOCATION COMPONENTS, OPERATIONAL DESCRIPTION – WIRING DIAGRAM, LOCATION COMPONENTS, OPERATIONAL DESCRIPTION
Wiring diagram
ADDITIONAL HEATER - Wiring diagram Fiat MULTIPLA 1.9 JTD 8V da 09/03Unlock Lifetime Access for This Car.

Components
Component codeNameAssembly reference
A1BatteryA10AlternatorA10AlternatorB105Additional heater remote control receiver fuse-
B37Fuse (MAXI FUSE) spark plug and diesel preheating-
B37Fuse (MAXI FUSE) spark plug and diesel preheating-
B38Fuse for supplementary heater-
C20Passenger side dashboard earth-
D1Front/facia junction-
D4Front/engine junction-
D4Front/engine junction-
D8Air conditioning heater front coupling-
D8Air conditioning heater front coupling-
D22Additional heater junction-
H80Climate control system controlsJ36Additional heater relay-
K79Additional heater outside air temperature sensor-
K79Additional heater outside air temperature sensor-
M70Climate control system control unitM72Fan speed transformerM72Fan speed transformerM74Additional heater remote control receiver-
M74Additional heater remote control receiverN85Passenger compartment ventilation fanR10Multiple tester connection-
Location of components
ADDITIONAL HEATER - Location of components Fiat MULTIPLA 1.9 JTD 8V da 09/03Unlock Lifetime Access for This Car.

Components
Component codeNameAssembly reference
A1BatteryA10AlternatorA10AlternatorB105Additional heater remote control receiver fuse-
B37Fuse (MAXI FUSE) spark plug and diesel preheating-
B37Fuse (MAXI FUSE) spark plug and diesel preheating-
B38Fuse for supplementary heater-
C20Passenger side dashboard earth-
D1Front/facia junction-
D4Front/engine junction-
D4Front/engine junction-
D8Air conditioning heater front coupling-
D8Air conditioning heater front coupling-
D22Additional heater junction-
H80Climate control system controlsJ36Additional heater relay-
K79Additional heater outside air temperature sensor-
K79Additional heater outside air temperature sensor-
M70Climate control system control unitM72Fan speed transformerM72Fan speed transformerM74Additional heater remote control receiver-
M74Additional heater remote control receiverN85Passenger compartment ventilation fanR10Multiple tester connection-
DescriptionThe vehicle is fitted with an autonomous additional heater in case the passenger compartment needs to be heated more quickly, with the engine running, if the climatic conditions are particularly harsh.The system basically consists of:a heater unit fixed to the front suspension crossmember and the underbody floor panelan electric fuel pump fixed to the underbody near the fuel tankan outside air temperature sensor positioned under the left front light clusteran exhaust pipe connected directly to the heater unitAn electronic control unit integrated in the unit controls the switching on, the maintenance and the switching off of the heater. The ignition of the mixture is guaranteed by a spark plug, the combustion is ensured by the air coming from a special fan and the fuel coming from an electric metering pump. The heat produced in the combustion chamber is surrendered to the engine coolant which comes into contact with it. The exhaust gases are expelled through a special exhaust pipe. For more details, 2888277see DESCRIPTION AND OPERATION:5020Msupplementary independent heaterThe additional heater circuit is protected by a specific fuse, located in the engine compartment in the relay and fuse box.The system only works with the engine running.
Functional description The additional heater unit is connected to the vehicle electrical system through connector D22. This connector, pin 2, receives a direct supply through the line protected by the maxifuse B37, which also supplies the diesel pre-heating system and by a specific fuse B38; pin 3 is earthed. Pin 1 of D22 is connected to the outside air temperature sensor K79 which, in turn, receives the reference supply from the alternator (D+ pin signal): in this way the signal for the outside temperature is only sent to the additional heater control unit if the engine is running. The additional heater control unit is equipped with an autodiagnostic system which can be used: by connecting the unit to connector R10: it receives signals from pin 4 of D22 via the diagnostic line.

Battery



A001A



A001A



A001B



A001B



A001C



A001D



A001D



A001E



A001F



A001F



A001G



A001G



A001G



A001G



Battery



A001A



A001A



A001B



A001B



A001C



A001D



A001D



A001E



A001F



A001F



A001G



A001G



A001G



A001G



Battery



A001A



A001A



A001B



A001B



A001C



A001D



A001D



A001E



A001F



A001F



A001G



A001G



A001G



A001G



Fuse (MAXI FUSE) spark plug and diesel preheating



B037



Fuse for supplementary heater



B038



B038



B038



B038



Passenger side dashboard earth



C020



C020



C020



C020



C020



Front/facia junction



D001A



D001A



D001A



D001A



D001A



D001A



D001A



D001A



D001A



D001A



D001A



D001A



D001B



D001B



D001B



D001B



D001B



D001B



D001B



D001B



D001B



D001B



D001B



D001C



D001A



D001A



D001A



D001A



D001A



D001A



D001A



D001A



D001C



D001C



D001C



D001C



D001C



D001C



D001C



D001C



D001A



D001C



D001C



Front/engine junction



D004A



D004A



D004B



D004B



D004



D004



D004



D004



D004A



D004A



D004B



D004B



D004B



D004B



D004B



D004



D004



D004



D004



D004B



D004B



D004B



D004B



D004B



D004B



D004B



D004B



D004B



Air conditioning heater front coupling



D008



D008



D008



D008



D008



D008



D008



D008



D008



D008



D008



D008



D008



D008



D008



D008



D008



D008



Additional heater junction



D022



D022



D022



D022



Climate control system controls



H080



H080



H080



H080



H080



H080



H080



H080



Climate control system controls



H080



H080



H080



H080



H080



H080



H080



H080



Additional heater outside air temperature sensor



K079



K079



K079



K079



K079



Climate control system control unit



M070A



M070B



M070A



M070A



M070B



M070B



M070A



M070A



M070B



M070B



Climate control system control unit



M070A



M070B



M070A



M070A



M070B



M070B



M070A



M070A



M070B



M070B



Additional heater remote control receiver



M074



M074



Additional heater remote control receiver



M074



M074



Additional heater remote control receiver



M074



M074


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