Iveco Daily. Manual — part 427
234
ELECTRIC/ELECTRONIC SYSTEM
D
AILY
Base - May 2004
The pretensioner is an explosive device activated electrically
with a signal leading from the electronic control unit; it is an
integral part of the seat belt reel and forms a single component
with it which is fastened to the vehicle pillar. It comes into
action in the event of a crash of a certain entity, in order to
take up the unavoidable slack in the seat belts due to the
action of the weight of the body, keeping the body close to
the seat back.
After cutting in the belt remains locked meaning that the
device has been triggered.
Operating principle
The moment in which a determinate deceleration of the
vehicle takes place, the electronic sensor in the control unit
sends a signal which ignites the explosive charge (ref. A) of the
gas generator (detonator).
The combustion of the propellant (ref. B) develops a gas, the
pressure of which generates a force that pushes the rack and
pinion piston (ref. C) upwards.
The upward movement of the piston makes the gears turn
(ref. D) which reverse the direction of rotation of the belt
rewinding it a few centimetres.
- The charge for the driver's pretensioner is connected to
the control unit on pins 1/2.
- The charge for the passenger's pretensioner is connected
to the control unit on pins 3/4.
- The charge for the centre pretensioner is connected to
the control unit on pins 16/17.
REEL WITH PRETENSIONER
TECHNICAL VIEW OF REEL WITH PRETENSIONER
BEFORE DEPLOYMENT
A. Explosive charge - B. Propellant - C. Rack and pinion
piston - D. Gears
TECHNICAL VIEW OF REEL WITH PRETENSIONER
AFTER DEPLOYMENT
A
B
C
D
The belt is unserviceable after every crash and needs
to be changed.
NOTE
Figure 276
Figure 277
Figure 278
ELECTRIC/ELECTRONIC SYSTEM
235
D
AILY
Driver's/passenger's pretensioner
To remove the driver's or passenger's reel with pretensioner,
proceed as follows:
- follow the rules of safety
- disconnect the battery cables (firstly the negative one
then the positive) and isolate them taping the terminals
- wait at least ten minutes before proceeding
- slacken the screw fastening the tool kit under the seat
- slacken the seat fastening screw and remove it
- slacken the two screws fastening the step to the door
pillar base
- partially remove the door weatherstrip
- slacken the screw fastening the seat belt
- remove the lower pillar trim overcoming the resistance
of the two snap buttons in the upper part of the trim
- disconnect the pretensioner connector from the air bag
cable (ref. A)
- connect the specific resistance on the air bag cable to
simulate the presence of the pretensioner; this is to
prevent the control unit from signalling a failure on the
system that does not exist if the ignition switch is
inadvertently turned to AVV or MAR.
- slacken the reel fastening screw (ref. B) and remove the
reel.
STEP FASTENING SCREW
REMOVING THE WEATHERSTRIP AND BELT FROM
THE PILLAR
REMOVING THE REEL WITH PRETENSIONER
A. Connector - B. Fastening screw
B
A
!
Do not use percussion screwing machines for the
following operations on active pretensioners.
Figure 279
Figure 280
Figure 281
8550
8551
8552
236
ELECTRIC/ELECTRONIC SYSTEM
D
AILY
Base - May 2004
The centre passenger's reel with pretensioner has the same
operating principle as the other two reels. To remove it
proceed as follows:
- follow the rules of safety
- disconnect the battery cables (firstly the negative one
then the positive) and isolate them taping the terminals
- wait at least ten minutes before proceeding
- slacken the screw fastening the tool kit under the seat
- slacken the seven screws fastening the seat
- disconnect the pretensioner connector from the air bag
cable
- remove the seat
- connect the specific resistance on the air bag cable to
simulate the presence of the pretensioner; this is to
prevent the control unit from signalling a failure on the
system that does not exist if the ignition switch is
inadvertently turned to AVV or MAR.
- slacken the three screws fastening the guard on the rear
part of the seat
- remove the guard
- slacken the reel and belt fastening screw, then remove the
reel with pretensioner
REMOVING THE TOOL KIT
REMOVING THE SEAT
REMOVING THE GUARD
REMOVING THE REEL WITH PRETENSIONER
!
Do not use percussion screwing machines for the
following operations on active pretensioners.
Figure 282
Figure 283
Figure 284
Figure 285
8568
8569
8567
8566
B
A
D
C
E
G
F
J
M
H
I
K
L
LOCATION OF COMPONENTS
A. Switch for signalling opening of the bonnet - B. Electronic central control unit (ecu) - C. Motor for closing/opening the
lock on the passenger-side door - D. Electronic module for volumetric detection and led for signalling that the anti-theft
protection is on - E. Motor for closing/opening lock on right-hand side door - F. Switch for signalling opening of rear door -
G. Motor for closing/opening lock on rear door - H. Switch for signalling opening of right-hand side door - I. Switch for
signalling opening of door on driver's side - J. Motor for closing/opening lock of door on driver's side - K. Switch for signalling
opening of door on passenger's side - L. Switch for blocking rear door - M. Self-powered siren
Figure 286
8572
ELECTRIC/ELECTRONIC SYSTEM
237
D
AILY
DOOR-BLOCKER WITH ANTI-THEFT PROTECTION
General information
The anti-theft protection is supplied with the door-blocker and consists of the following:
- a warning siren
- an (ultrasonic) electronic module for volumetric detection, including a LED for signalling that the anti-theft protection is ON
- an electronic central control unit (ECU) for the anti-theft/door-blocker, 433.92 MHz for the European market
- two remote-control keys.
When the anti-theft protection is activated/de-activated by means of the remote-control key, the doors (driver's and passenger's
doors and, for the van version, the side and rear doors) of the vehicle close/open simultaneously.
To complete the system, in addition to the components already mentioned above there are the following:
- switches and motors for closing/opening the doors.
- switch for signalling that the bonnet is being opened.
- switch on a switchboard for locking the rear door.
In addition, the electronic central control unit is connected to the immobiliser control unit, to the direction indicator switch
(indicator flashing lights) and to the 38-pin diagnostics connector (cell 12).
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст