DAF 95XF. Manual — part 365
5
CHANGES IN THE ELECTRICAL SYSTEM
Changes in the electrical system from chassis number 0E527418
5-12
Column 1 Column 2
Column 3
G178
Relay, accessories
16/17
G201
Relay, EFPH fuel heating
796/799
G231
Relay, radio lighting (12V)
704/706/711/713
G234
Relay, fuel filter/water separator control
788/793
G236
Micro relay, windscreen wiper (speed 1 or 2)
81/83
G237
Micro relay, windscreen wiper (automatic zero position)
82/85
G238
Micro relay, headlamp washer
79/92
G239
Relay, disengage third brake
419/429
G240
Micro relay, PTO/speed control
101/152
G243
Micro relay, engine brake (DEB)
432/434/437/587
G247
Relay, heater fan of cab heater
523/529
G257
Micro relay, recirculation valve
380/381
G258
Micro relay, recirculation valve
380/383
G259
Relay, N10-PTO control
684/686
G267
Micro relay, air-conditioning
368/371
G279
Micro relay, air-conditioning
369/375
G284
Micro relay, Voith retarder 133-2
455/456
G297
Relay, cab air suspension
295/298
G300
Micro relay, Thermo 90 cab heater
521/522
G301
Micro relay, lighting D+
5/202
G302
Micro relay, Swedish lighting
202/206
G303
Relay, starter motor lock
4/11
G321
Relay, UPEC superstructure connector
564/565
G328
Relay, UPEC engine stop
564/596
G392
Micro relay, rear fog light takeover
211/213
G420
Relay, gearbox gate protection takeover
37/78
G516
Central cab earth, co-driver’s side
192
G718
Connection parking brake/PTO
103
G721
Connection multi-function switch
489
G723
Connection central door locking
680
G725
Connection D3LC cab heater
505/514
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5
Changes in the electrical system from chassis number 0E527418
CHANGES IN THE ELECTRICAL SYSTEM
5-13
5.4 SECTION DIAGRAMS OF CIRCUIT DIAGRAM 1316630/30
1
Charging circuit/starter motor/ignition /
starting switch
5
CTE-3
13
Gearbox and gate protection
20
Heater fan/air-conditioning
35
Radio converter
40A
Eberspächer cab heater (with
thermostat unit)
40B
Eberspächer cab heater (with timer)
46
Eberspächer Hydronic 10 cab heater
49
Rotating lights on roof
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5
CHANGES IN THE ELECTRICAL SYSTEM
Changes in the electrical system from chassis number 0E527418
5-14
1
CHARGING CIRCUIT/STARTER MOTOR/IGNITION /STARTING SWITCH
CONTACT CIRCUIT
If ignition/starter switch C539 is turned (contact
1 is connected to pin 6), the “accessories” relay
(G178) will be activated.
Voltage is now applied through fuse E037, wire
1100, switch C539 and wire 1130 to contact 85
of relay G178 (“accessories” relay). As a result
of the activation of relay G178 a connection is
made between contacts 30 and 87 and a
voltage is applied to D525 (electronic 24V/12V
converter) through fuse E037, wire 1100,
contacts 30 and 87, wire 1147, fuse E027, wire
1106. At the same time a voltage is applied to
C725 (work lamp switch) through fuse E052 and
wire 1100.
If the vehicle ignition is turned off, no voltage is
applied to connection point 42. As a result, pin
55 of the CTE-3 unit will be connected to the
supply voltage for 3 minutes, causing the engine
stop/engine brake valve (B082) to become
activated.
If the vehicle is switched to contact again within
these 3 minutes, the engine stop/engine brake
valve (B082) is deactivated again.
For more information on activating the engine
brake: see the system manual.
STARTING CIRCUIT
If contact switch C539 is turned (contact 1 is
connected to contacts 4 and 6), contact relay
G015 is activated through wire 4001. If the
contact switch is turned into the “starting”
position, a connection between points 1 and 2 is
made in this switch. The supply now runs from
the batteries through fuse E037, connection 1-2
of the contact/starter switch and wire 4004,
contacts 30 and 87 of relay G303 (starter motor
lock relay) to connection point 50 of starter
motor B010. The relay coil is located between
points 50 and 31 (earth) and will supply the
starter motor with voltage through connection
points 30 and 31, as a result of which the motor
will start operating.
Voltage is also applied to pin 45 of the CTE-3
through fuse E037, wire 1100, switch C539
(connections 1 and 2) and wire 4004.
Depending on the condition (engine speed
exceeding approx. 400 rpm and supply voltage
(battery voltage) on the CTE unit exceeding 17
V), glowing is activated during starting, on the
understanding that preglowing has taken place
first.
Via the same circuit there is a voltage on D827
(Electronic unit, cab heater).
For more information on glowing: see the
system manual.
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5
Changes in the electrical system from chassis number 0E527418
CHANGES IN THE ELECTRICAL SYSTEM
5-15
As soon as the motor is running, a voltage is
applied from A502 to wire 1020. This wire is
connected to both D853 (CWS-2), D871
(electronic unit, cab heater) (D3LC) (if fitted) and
A040 (socket for alarm system) (if fitted). This
voltage is also applied to connection point 85 of
relay G303 (Starter motor lock relay). It is
activated and will interrupt the starting circuit.
CHARGING CIRCUIT
If the contact is activated, voltage is applied to
generator resistor D+ (B036).
The other side of the resistor is connected to
earth through the diode for generator safety (D+)
(D668), wire 1020, D+ connection of the
alternator and the integrated voltage regulator
(A502) in the generator. This will cause a small
current to run, causing a magnetic field in the
alternator.
After starting, the voltage on clamps B+ and D+
will increase to approx. 28.4 V. This is caused by
the fact that the regulator disconnects the earth
connection in the regulator and connects it to
the battery voltage. This voltage is also applied
to wire 1020, so that the voltage difference over
the resistor becomes 0 V. The magnetic field will
now disappear, so that the generator will not be
energised for a short period of time. This will
reduce the voltage on outputs B+ and D+.
The regulator reactivates when the voltage
drops below 27.6 V. This means that the voltage
supplied by the generator remains relatively
constant. The batteries are fed via generator
output B+.
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