Fiat 500 1.4 16v – REAR WINDOW WASH/WIPE – – WIRING DIAGRAM, LOCATION COMPONENTS, OPERATIONAL DESCRIPTION – WIRING DIAGRAM, LOCATION COMPONENTS, OPERATIONAL DESCRIPTION

WIRING DIAGRAM - REAR WINDOW WASH/WIPE - Fiat 500 1.4 16v

REARSCREEN WASH/WIPE - WIRING DIAGRAM Fiat 500 1.4 16v

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COMPONENTS - REAR WINDOW WASH/WIPE - Fiat 500 1.4 16v

Component code	Description	Reference to the operation
A001	BATTERY
B001	JUNCTION UNIT
C015	DASHBOARD EARTH, DRIVER'S SIDE	-
C030	LEFT REAR EARTH	-
D006	FRONT/REAR COUPLING	-
H001	IGNITION SWITCH
H005	STEERING COLUMN SWITCH UNIT
M001	BODY COMPUTER
N016	REAR WINDOW WIPER MOTOR
N022	WINDSCREEN WASHER/ REAR WINDOW WASHER PUMP MOTOR

COMPONENT LOCATION - REAR WINDOW WASH/WIPE - Fiat 500 1.4 16v

REARSCREEN WASH/WIPE - COMPONENT LOCATION Fiat 500 1.4 16v

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Component code	Description	Reference to the operation
A001	BATTERY
B001	JUNCTION UNIT
C015	DASHBOARD EARTH, DRIVER'S SIDE	-
C030	LEFT REAR EARTH	-
D006	FRONT/REAR COUPLING	-
H001	IGNITION SWITCH
H005	STEERING COLUMN SWITCH UNIT
M001	BODY COMPUTER
N016	REAR WINDOW WIPER MOTOR
N022	WINDSCREEN WASHER/ REAR WINDOW WASHER PUMP MOTOR

DESCRIPTION - REAR WINDOW WASH/WIPE - Fiat 500 1.4 16v

The function of the rear screen washer/wiper can only be operated when the key is in the MAR (ON) position and is exclusive to the ignition phase (INT/A).When the rearscreen wiper ring nut located on the right steering column switch unit lever is moved to the ON position, the rearscreen wiper is activated in one of the following modes:intermittent: with a pause of 2.7 secs. between one stroke and the nextsubject to the windscreen wiper (if there is a simultaneous windscreen/rearscreen wiper request): synchronised operation at half the frequency of the windscreen/rearscreen wiper;slow continuous: if reverse gear is engaged.767With the windscreen wipers working, if reverse gear is engaged, the rearscreen wiper is automatically activated: this function is managed by the Body Computer, which receives information from the engine control unit via the CAN network.The rearscreen washer function can be deactivated by pushing the lever slightly toward the dashboard: this operates the rearscreen washer pump. Keeping the lever pushed for more than half a second also starts the rearscreen wiper (smart washing) at a continuous speed, while, when the lever is released, the rear wiper performs 3 more strokes. A final stroke after 6 seconds completes the wiping operation (to eliminate any smears).If the rearscreen wiper was already activated before the washing command using the lever, the washing logic is only effective for activating intermittent operation.The rear screen washer/wiper two-way pump circuit is operated by a relay built into the Body Computer that allows different polarisation of the motor according to commands given by the user. Its power supply line is protected by a fuse located in the same Body Computer.

FUNCTIONAL DESCRIPTION - REAR WINDOW WASH/WIPE - Fiat 500 1.4 16v

The rearscreen wiper control and the activation button for the rearscreen washer, built into steering wheel interface H005, receive a reference earth to pin 2 of connector B of the steering wheel interface.Body Computer M001 (pin 59 of connector D) receives the rearscreen wiper activation command from the steering wheel interface H005 (pin 2 of connector A).Similarly, the rearscreen washer command is sent from pin 4 of connector A of H005 to pin 41 of connector D of Body Computer M001.Body Computer M001 receives power direct from the battery (pin 1 of connector A) protected by fuse F01 of engine compartment junction unit B001 (pin 18 of connector B); however, this is powered when the ignition is on (INT), to pin 11 of connector E.Body Computer M001 is powered when the ignition is on (INT/A) at pin 1 of connector E, excluding the rearscreen washer/wiper system during start-up.Body Computer M001 is connected to the driver-side dashboard earth C015 via pins 9 and 10 of connector E.Body Computer M001 (pin 13 of connector C) sends the command signal to rearscreen washer motor N016 (pin 3). Pin 7 of connector F on the other hand, receives the earth signal coming from the motor end of travel cam which stops operation (pin 2).Rearscreen wiper N016 is connected (pin 1) to left rear earth C030.Body Computer M001 (pins 44 and 45 of connector B) receives the reverse gear engaged signal via the C-CAN from engine management control unit M010.Therefore, with the windscreen wipers activated and reverse gear engaged, Body Computer M001 activates the rear wipers in slow continuous mode.Body Computer M001 sends two signals from pins 15 (negative) and 2 (positive) of connector C, which operates the windscreen/rearscreen washer two-way pump N022 which then sends the liquid detergent back to the rearscreen wiper under the effect of the polarisation described previously. The supply line from the pump is protected by fuse F43 of Body Computer M001.