Fiat DOBLO 1.3 JTD 16V Fino a 10/2000 – HEATED REAR WINDSCREEN AND DOOR MIRROR DEFROSTING – – WIRING DIAGRAM, LOCATION COMPONENTS, OPERATIONAL DESCRIPTION – WIRING DIAGRAM, LOCATION COMPONENTS, OPERATIONAL DESCRIPTION

Wiring diagram - HEATED REAR WINDSCREEN AND DOOR MIRROR DEFROSTING - Fiat DOBLO 1.3 JTD 16V Fino a 10/2000

HEATED REAR WINDSCREEN AND DOOR MIRROR DEFROSTING - WIRING DIAGRAM Fiat DOBLO 1.3 JTD 16V Fino a 10/2000

COMPONENTS - HEATED REAR WINDSCREEN AND DOOR MIRROR DEFROSTING - Fiat DOBLO 1.3 JTD 16V Fino a 10/2000

Component code	Name	Assembly reference
B1	Engine compartment junction unit	-
B1	Engine compartment junction unit
B1	Engine compartment junction unit
B2	Junction unit under dashboard	-
B2	Junction unit under dashboard
C15	Facia earth, driver''s side	-
C30	Left rear earth	-
D4	Front/engine coupling	-
D4	Front/engine coupling
D30	Front left door connection	-
D31	Front right door connection	-
D85	Tailgate rear seal/	-
D85	Tailgate/ rear coupling	-
E50	Instrument panel	-
E50	Instrument panel
H90	Switch control unit
K84	Speedometer sensor
M1	Body computer
P53	Right heated rear windscreen
P54	Left heated rear windscreen
P60	Left door mirror
P61	Right door mirror

Location of components - HEATED REAR WINDSCREEN AND DOOR MIRROR DEFROSTING - Fiat DOBLO 1.3 JTD 16V Fino a 10/2000

HEATED REAR WINDSCREEN AND DOOR MIRROR DEFROSTING - LOCATION OF COMPONENTS Fiat DOBLO 1.3 JTD 16V Fino a 10/2000

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COMPONENTS - HEATED REAR WINDSCREEN AND DOOR MIRROR DEFROSTING - Fiat DOBLO 1.3 JTD 16V Fino a 10/2000

Component code	Name	Assembly reference
B1	Engine compartment junction unit	-
B1	Engine compartment junction unit
B1	Engine compartment junction unit
B2	Junction unit under dashboard	-
B2	Junction unit under dashboard
C15	Facia earth, driver''s side	-
C30	Left rear earth	-
D4	Front/engine coupling	-
D4	Front/engine coupling
D30	Front left door connection	-
D31	Front right door connection	-
D85	Tailgate rear seal/	-
D85	Tailgate/ rear coupling	-
E50	Instrument panel	-
E50	Instrument panel
H90	Switch control unit
K84	Speedometer sensor
M1	Body computer
P53	Right heated rear windscreen
P54	Left heated rear windscreen
P60	Left door mirror
P61	Right door mirror

Description - HEATED REAR WINDSCREEN AND DOOR MIRROR DEFROSTING - Fiat DOBLO 1.3 JTD 16V Fino a 10/2000

The rear window and door mirror heater coils are activated by a button in the switch unit in the middle of the facia.The defrosting circuit is protected by a special fuse and controlled by a relay both located in the junction unit under the dashboard.The control is deactivated in two ways:MANUALLY: by pressing the button again;AUTOMATICALLY: after 20 minutes of actual operation, i.e. with the control active.Automatic rear window heater element operation is dependent on the engine rpm signal. The activation/deactivation sequence is as follows:for the first 10 minutes the operation does not depend on the engine speed;afterwards, it depends on the operation of the engine, namely: if the engine speed is below 1000 rpm for ten seconds, the heated rear windscreen is switched off, otherwise, if the engine speed is above 1000 rpm, it remains on until it has been effectively working for twenty minutes.If the battery voltage goes below 8.5 V, the heated rear windscreen relay feed switches off the circuit.

Functional description - HEATED REAR WINDSCREEN AND DOOR MIRROR DEFROSTING - Fiat DOBLO 1.3 JTD 16V Fino a 10/2000

The activation signal for defrosting the rearscreen and the door mirrors consists of an earth signal coming from the switch unit H90 entering at pin 32 of connector F of the body computer M01 . The ideogram for the switch H90 is lit up by the supply controlled by the ignition (INT) at pin 6 via a line protected by fuse F49 of the junction unit under the dashboard B02 .In order to activate the defrosting of the rearscreen and the rear view mirrors, the body computer M01 receives a signal from both switch H90 and the speedometer sensor K84 via pin 17 connector C. If necessary, it then energizes the relay R11 in the junction unit under the dashboard B02 .Once energized, the relay R11 supplies: the left heated rear windscreen P54 and the right heated rear windscreen P53 via fuse F40 and the left P60 and right P61 mirrors via fuse F41 .Once the function is activated, the body computer M01 is involved in lghting up the warning light in the instrument panel E50 from pins 6 and 5 of connector D of the body computer.The instrument panel is earthed via the body computer, from pin 2 of connector A.The body computer can be supplied via pin 11 connector E (supply controlled by the ignition) and pin A connector C (direct supply) of the junction unit B02 . There is a protective fuse F1 for the direct supply located in the junction unit B01 .These lines also supply the instrument panel E50 via two lines protected by fuses F37 (pin 1 connector A) and F53 (pin 3 connector A).Pins 8 and 9 connector D of the body computer are connected to earth.