Alfa gt jtd 1.9 Driverd door window use to go down with switch but not up but would go up if I held the phob in lock position now won't go up or down but tries sometimes?

There is no separate fuse for power windows:
https://www.2carpros.com/questions/nissan-altima-2006-nissan-altima-windows-and-locks

https://oards.com/causes-of-power-windows-not-working/

How do you know they need to be replaced ? The switches incorporate a electronic module . Driver door module .
Power Window System Components
The power window system consists of the following components:
• Driver Door Module (DDM)
• Passenger Door Module (PDM)
• Body Control Module (BCM)
• RR power window switch
• Window up and window down relays in each of the rear passenger window switches
• Window lockout switch
• Reversible power window motors in each of the doors (circuit breaker protected)
• LT DOOR CB 25A (System power for left windows)
• RT DOOR CB 25A (System power for right windows)

Power Window System Controls
The power window system will operate anytime the Retained Accessory Power (RAP) system is active or when the ignition switch is in the ACCY or ON position.
The DDM contains four power window switches which are integral components. Closing any of the normally open, rocker type switches provides the DDM with a request for power window operation. The switches for the two front windows have three positions UP, Down and Express Down, while the switches for the rear windows have only two positions, UP and Down. Each of these switches and their positions is a direct input into the DDM. Upon receiving a request for power window operation, the DDM, transmits a Class 2 message indicating the switch and it's changed position.
The PDM contains a single power window switch that is an integral component. Closing of this normally open, rocker switch provides the PDM with a request for the front passenger power window operation. The switch for the front passenger window has two positions Up and Down. Each of these switch positions is a direct input to the PDM.
The two rear passenger doors have there own switches. Each of the switches contain a power window up and down relay. A switch activation alone can control the up and down functions of the rear windows. However the BCM, upon receiving a Class 2 message from the DDM, can control the set of relays which will activate the rear window motors.


The door locks operate the same way .

Door Lock System Components
The power door lock system consists of the following components:
• The driver door module (DDM)
• The passenger door module (PDM)
• The body control module (BCM)
• The driver information center (DIC)
• The rear door lock switch
• The door lock relay
• The door unlock relay
• The liftgate lock relay--utility vehicles with liftgate only
• The reversible door lock actuators in each of the doors and liftgate
• LOCKS 20A fuse (rear lock/unlock relay supply voltage)
• ECC 10A fuse (liftgate lock relay supply voltage)


What's not working ? Windows , power locks ?
Hooking up a professional type scan tool ,not a code reader . Code reader can not read codes in the BCM or door modules . Do you know what a DTC is ? diagnostic trouble code >All these can set for door electronic problems .
DTC B1023
DTC B1544, B1600, or B1605
DTC B1580, B1590, B1610, or B1620
DTC B1640 or B1645
DTC B1722
DTC B3808
DTC B3809
DTC B3819
DTC B3820
DTC B3821
DTC B3822
DTC B3823
DTC B3824

It's not the BCM ,more then likely it's that windows switch .
Rear Door (LH or RH) REAR POWER WINDOW SWITCH LH OR RH OPERATION WINDOW UP When the rear power window switch LH or RH is pressed in the up position Power is supplied ? through rear power window switch LH or RH terminal 4 ? to rear power window motor LH or RH terminal 2. Ground is supplied POWER WINDOW SYSTEM GW-17 C D E F G H J K L M A B GW Revision: January 2005 2004 Pathfinder Armada ? through rear power window switch LH or RH terminal 5 ? to rear power window motor LH or RH terminal 1. Then, the motor raises the window until the switch is released. WINDOW DOWN When the rear power window switch LH or RH is pressed in the down position Power is supplied ? through rear power window switch LH or RH terminal 5 ? to rear power window motor LH or RH terminal 1. Ground is supplied ? through rear power window switch LH or RH terminal 4 ? to rear power window motor LH or RH terminal 2. Then, the motor lowers the window until the switch is released. MAIN POWER WINDOW AND DOOR LOCK/UNLOCK SWITCH OPERATION WINDOW UP When the main power window and door lock/unlock switch (rear LH) is pressed in the up position Power is supplied ? through main power window and door lock/unlock switch terminal 3 ? to rear power window switch LH terminal 3 ? through rear power window switch LH terminal 4 ? to rear power window motor LH terminal 2. Ground is supplied ? through main power window and door lock/unlock switch terminal 1 ? to rear power window switch LH terminal 2 ? through rear power window switch LH terminal 5 ? to rear power window motor LH terminal 1. Then, the motor raises the window until the switch is released. When the main power window and door lock/unlock switch (rear RH) is pressed in the up position Power is supplied ? through main power window and door lock/unlock switch terminal 5 ? to rear power window switch RH terminal 3 ? through rear power window switch RH terminal 4 ? to rear power window motor RH terminal 2. Ground is supplied ? through main power window and door lock/unlock switch terminal 7 ? to rear power window motor RH terminal 2 ? through rear power window switch RH terminal 5 ? to rear power window switch RH terminal 1. Then, the motor raises the window until the switch is released. WINDOW DOWN When the main power window and door lock/unlock switch (rear LH) is pressed in the down position Power is supplied ? through main power window and door lock/unlock switch terminal 1 ? to rear power window switch LH terminal 2 ? through rear power window switch LH terminal 5 ? to rear power window motor LH terminal 1. Ground is supplied ? to main power window and door lock/unlock switch terminal 3 ? through rear power window switch LH terminal 4 ? through rear power window switch LH terminal 3 ? to rear power window motor LH terminal 1. Then, the motor raises the window until the switch is released

if a pin is burnt on any ECU engine computer
inside a diode may have failed

ECU incl ignition key for Alfa Romeo 147 1 9 JTD 115 hp 5 doors 2004 Bosch...


find a used or referbished unit with same numbers on the outer casing as your damaged ECU
the replacement has to be from the same year and engine type as your car and same number of pins and plug ins

auto electrician might have the equipment and time to referb it

when fitting a used ECU
you may need to re sync the system with a diagnostic tool

I had a similar problem in my 03 Spider. The wiring loom for the window switch and motor comes out of the front pillar and in through the edge of the door. Every time the door opens and closes the wires in the loom flex. I had a broken wire in this part of the loom.

it is the main computer

post the symptoms. "cant switch off what, exactly"?
the FSM covers the tests, ever heard of the FSM. (buy it at the dealer)
or alldata.com1.9JTD,
i get to decode JTD ,thanks for not posting maker , model
Is this a FIAT"? why must i guess.?
uniJet Turbo Diesel,
Some PSA Peugeot Citroen diesel engines are also rebadged JTD units.
Applications:

• Alfa Romeo 145
• Alfa Romeo 146
• Alfa Romeo 147
• Alfa Romeo 156
• Alfa Romeo 159
• Alfa Romeo GT
• Cadillac BLS
• DR5
• Fiat Bravo
• Fiat Brava
• Fiat Croma II
• Fiat Doblo
• Fiat Grande Punto
• Fiat Marea
• Fiat Multipla
• Fiat Punto
• Fiat Sedici
• Fiat Stilo
• Fiat Strada
• Lancia Delta
• Lancia Lybra
• Lancia Musa
• Opel Astra H
• Opel Signum
• Opel Vectra C
• Opel Zafira B
• Saab 9-3
• Saab 9-5
• Suzuki SX4
• Alenia Aeronautica Sky-Y

pick one, and state country?
some (most?) alarms vary by country (LAWS dictate that)

Ask local Alfa Romeo Dealership, the Service Manager will know the answer.

an air leak would weaken the mix of fuel to air so giving you better fuel efficiency but a poor power output.
was my last answer not to your liking, re **** fuel consumption on all fiat/alpha cars.but it is true, ask any owner........14.7 average mpg.......£205 road tax.....(tax it for a year and quadruple its value...)