Service Training
Self-study Programme 370
The Crafter
Electrical system
Design and function
Commercial
Vehicles
Innovations in automotive engineering are also taking
place in the commercial vehicle segment.
The Volkswagen Crafter is therefore fitted with
extensive electrical equipment and with electrical and
optical data bus systems.
In comparison with the predecessor model,
these systems enable familiar electrical
functions to be actuated in different ways and
new functions to be implemented.
This self-study programme is intended to explain
these functions and help you to understand
their interconnections better.
The self-study programme shows the design and
function of new developments.
The contents will not be updated.
2
S370_087
NEW Important
Note
For current testing, adjustment and repair
instructions, refer to the relevant
service literature.
Contents
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Vehicle electrical system. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Ignition lock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Anti-theft system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50
Dash panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56
Convenience systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Tachograph . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .76
Special control units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .78
Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
Glossary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Test yourself . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
3
Introduction
Data bus systems
Data bus networking
The Volkswagen Crafter's control units are networked
via the CAN data bus and the MOST data bus.
Networking enables data to be exchanged between
the individual control units.
Instead of using conventional (discrete) cable
connections, the data are transmitted via the data
buses in digital form as an electrical signal or
as a light signal. This makes it possible to make data
available to several control units.
The CAN data bus is sub-divided into three individual
systems, the CAN drive data bus, the CAN
convenience data bus and the CAN diagnostic data
bus.
All three bus systems are connected to each other via
the electronic ignition lock D9, and are therefore able
to exchange information.
Diagnostic
interface
CAN drive
data bus
CAN
convenience
data bus
MOST data bus
interface
MOST data bus
Data bus
K-wire
Serial data cable
S370_080
4
Legend
D9 Electronic ignition lock
E16 Heater/heat output switch
J104 ABS control unit
J234 Airbag control unit
J285 Control unit in dash panel insert
J301 Air conditioning system control unit
J345 Trailer detector control unit
J364 Auxiliary heater control unit
J386 Driver door control unit
J412 Mobile telephone operating electronics control unit
J446 Parking aid control unit
J502 Tyre pressure monitor control unit
J503 Control unit with display for radio and navigation
J514 Electronic manual gearbox control unit
J519 Onboard supply control unit
J527 Steering column electronics control unit
J528 Roof electronics control unit
J604 Auxiliary air heater control unit
J621 Tachograph control unit
J623 Engine control unit
J764 Electronic steering column lock control unit
J819 Control unit for middle of dash panel
J820 Control unit for programmable special functions
S370_001
R Radio
R41 CD changer
T16 16-pin connector (diagnostic connection)
5
Introduction
Installation locations of the electrical components
Overview of installation locations
The vehicle electrical system has a decentralised
structure; the fuse and relay installation locations are
therefore in different locations throughout the vehicle.
Junction boxes 2 and 3 for
bus systems,
on the right A pillar
Fuse holder (SA),
on right-hand side of battery, visible only following
removal
Connector (T16, diagnostic connection),
on the left A pillar
6
Fuse holder D (SD),
beneath the driver's seat
Fuse holder B (SB),
left A pillar
Junction box 1 for bus systems,
beneath the front left dash panel
Fuse holder C (SC),
on the left A pillar
S370_002
7
Introduction
Installation locations of the control units in the CAN drive data bus
Control units and installation
locations
The adjacent illustration shows the control units which
take part in CAN drive data bus data communication
and their installation locations.
Data are transmitted at a speed of
500 kbit/s. Transmission is carried out via the
CAN high cable and the CAN low cable.
CAN high cables are green/white and the
CAN low cables are green.
To ensure reliable data transmission,
the CAN cables are twisted together.
The CAN drive data bus is not 1-wire-capable;
if a CAN cable fails, no data transmission is possible.
Steering column electronics control
unit J527,
on the steering column
Electronic ignition lock D9,
on the right next to the steering wheel
8
ABS control unit J104,
on the left in the engine compartment
Engine control unit J623,
on the left in the engine
compartment
S370_004
9
Introduction
Installation locations of the control units in the CAN convenience
data bus
Control units and installation
locations
The adjacent illustration shows the control units which
take part in CAN convenience data bus data
communication and their installation locations.
Data are transmitted at a speed of
83.3 kbit/s. Transmission is carried out via the CAN
high cable and the CAN low cable.
CAN high cables are brown/red and the CAN low
cables are brown.
Air conditioning system control unit J301,
in centre of dash panel
To ensure reliable data transmission, the CAN
cables are twisted together.
The CAN convenience data bus is 1-wire-capable;
if a CAN cable fails, data transmission remains
possible.
Control unit for middle of dash panel J819,
in centre of dash panel
Radio R/control unit with display for radio and
navigation J503 *,
in centre of dash panel
10
* Acts as the interface for the MOST
infotainment data bus
Electronic ignition lock D9,
on the right next to the steering
wheel
Airbag control unit J234,
beneath the centre console
Auxiliary heater control unit J364,
in moulded headlining near to the interior mirror
Roof electronics
control unit J528,
in moulded
headlining near to
the interior mirror
Trailer detector control
unit J345,
beneath the front left seat
Control unit for programmable
special functions J820,
beneath the front left seat
Parking aid control unit J446,
beneath the front left seat
Tyre pressure monitor control unit J502,
beneath the front left seat
Onboard supply control unit J519,
on the left A pillar
Driver door control unit J386,
in the front left door
S370_003
11
Introduction
Installation locations of the control units in the MOST infotainment
data bus
Control units and installation
locations
Besides the familiar CAN data bus systems,
the Volkswagen Crafter is also equipped with an
optical data bus system.
This data bus system has been named according
to the "Media Oriented Systems Transport" (MOST)
cooperation.
This co-operation has been established by various car
manufacturers, their suppliers and software
companies in order to implement a standardised
system for fast data transmission.
The optical MOST data bus is used to exchange data
between the radio/control unit with display for radio
and navigation, the CD changer and the mobile
telephone operating electronics control unit by means
of light waves.
In comparison with radio waves, light waves have
very short wavelengths, do not generate
electromagnetic interference waves, are
simultaneously insensitive to these and have
a significantly higher data transmission rate than
electronic data bus systems.
On routing, the radius of the fibre optical cable must
be at least 25 mm.
Mobile telephone operating
electronics control unit J412,
behind the glove box
12
Control unit with display unit for radio and
navigation J503/radio R,
in centre of dash panel
CD changer R41,
centre of vehicle interior
S370_071
During diagnosis, please observe the
Guided Fault Finding instructions.
13
Vehicle electrical system
Batteries
Equipment
The Volkswagen Crafter can be optionally equipped
with a dual-battery vehicle electrical system; in this
case, a starter and a vehicle electrical supply battery
are installed.
Starter battery
The vehicle electrical system's standard 12 V vehicle
voltage is supplied by the maintenance-free starter
battery. The starter battery is installed in the covered
battery recess in front of the driver's seat (left-hand
drive vehicle) or the front passenger's seat (right-hand
drive vehicle).
A vent pipe emerges into the open air from the recess.
Vehicle electrical system battery
To supply high-current, body-side consumers,
a second battery, located on the left of the engine
compartment, is available in addition to the starter
battery (left-hand drive vehicles only). This second
battery is not intended as a starter battery.
By supplying the high-current consumers, it is instead
intended to protect the starter battery from discharge,
thereby maintaining the vehicle's ability to start.
S370_049
S370_050
14
Functional diagram
The second battery A1 is only available in
combination with the battery isolation relay J7.
This prevents battery A from being drained by
consumers which are connected to the second battery.
At the same time, drainage of the second battery
by the standard consumers is prevented.
J7 SA
A1 A
Legend
ABattery
A1 Second battery
BStarter
J7 Battery isolation relay
J519 Onboard supply control unit
SA Fuse holder A
TV32 Jump start connection
J519
SSSSSS
TV32
B
S370_051
Signal output
Ground
Signal input
Positive
CAN data bus cable
The signal cable colours shown in the illustration
apply to all subsequent functional diagrams.
15
Vehicle electrical system
Jump start connections
Equipment
The Volkswagen Crafter is equipped with a positive
and a negative connection for jump-starting and for
charging the battery.
Positive jump start connection
To connect a jump-starting cable or a battery charger,
a connection point for the positive cable is located on
the left-hand side of the air filter housing in the
engine compartment.
Negative jump start connection
Jump start connection
S370_052
Jump start connection
16
To connect a jump-starting cable or a battery charger,
a connection point for the negative cable is located
on the left-hand wing in the engine compartment.
S370_053
Negative main connection
The optional, main connection for the battery
negative cable is located on the right next to the
accelerator pedal.
The connection and the ground bolt can be separated
by pulling the red actuation tab.
This enables the battery to be isolated from the
vehicle electrical system if necessary or prescribed for
repair work.
Main connection Actuation tab
S370_054
17
Vehicle electrical system
Onboard supply control unit
Installation location
The onboard supply control unit (OBSCU) J519 is
located, together with the fuse and relay box, on
the left of the vehicle interior in the footwell beneath
the instrument panel.
Variants
It is available in the following variants:
-Standard
- Low line
-Mid line and
- High line
The different variants offer various functions.
Relay box
S370_006
Onboard supply control unit
18
Fuse box
S370_007
Functions
Function Standard Low line Mid-line High-line
Exterior light control system with bulb monitoringXXXX
High-level brake light X X
Fog lights XX
Turn signal actuation XXXX
Interior light control system XXXX
Interior convenience light X
Windscreen wiper and washer systemXXXX
Rear window wiper and washer system X X
Heated rear window X X
Heated windscreen X
Central locking: Sliding door, hinged rear door X X X
Central locking: 2nd sliding door X X
Rotary light switch input XXXX
Sensor signal and switch input XXXX
Vent windows X
Headlight washer system X X
Auxiliary turn signal module X X
Alarm function XXXX
ATA function XXXX
Central locking: Front passenger door XXXX
Window regulator: Front passenger door XXXX
19
Vehicle electrical system
Light switch
Function
The light switch E1 is responsible for actuating the
exterior light functions. The onboard supply control
unit reads in the signals from the voltage-coded light
switch directly.
The signals for the turn signal and main beam
functions are transmitted from the steering column
electronics control unit via the CAN drive data bus
and the CAN convenience data bus.
S370_005
Variants
The light swicth is available in eight different variants.
Variant 1 Variant 2 Variant 3 Variant 4 Variant 5 Variant 6 Variant 7 Variant 8
Off Autom.
driving
lights
Side light Off Side light Off Right
Dipped
beam
Rear fog
light
Side light Dipped
Dipped
beam
Rear fog
light
Off Autom.
driving
lights
Side light Off Autom.
beam
Rear fog
light
Fog light Rear fog
Dipped
beam
light
Left parking
light
parking light
Side light Off Side light Off
Dipped
beam
Left parking
light
Right
parking light
driving
lights
Side light Dipped
Left parking
light
Right
parking light
Off Autom.
beam
Left parking
light
Right
parking light
driving
lights
Side light
20
Fog light Rear fog
light
Dipped
beam
Rear fog
light
Rear fog
light
Fog light Rear fog
Dipped
beam
light
Fog light
Turn signal control system
Function description
The onboard supply control unit is the master for the
turn signal function and carries out the various turn
signal functions. It receives all requests to actuate the
turn signals, prioritises these and is the only control
unit to implement a turn signal pulse on the CAN data
bus. All of the other involved control units evaluate
this turn signal pulse.
Turn signal actuation priority
The turn signals are actuated according to the
following piority:
● 1 Airbag hazard warning flashing
● 2 Special alarm flashing
● 3 Direction indication or hazard warning flashing
Airbag hazard warning flashing
In the event of airbag deployment, the airbag control
unit transmits a CAN message to the onboard supply
control unit. The hazard warning flashing function is
then triggered.
Electronic ignition lock D9
● 4 ATA alarm flashing
● 5 Central locking feedback flashing
This function is deactivated by actuating the hazard
warning lights button (E229) once or by switching the
ignition off, on and off again.
Airbag control
unit J234
Turn signal bulbs
Onboard supply control unit J519
S370_008
21
Vehicle electrical system
Special alarm flashing
The control unit for programmable special functions
can request alarm flashing with a pre-specified on/off
phase from the onboard supply control unit.
Switch
Depending on the way in which the control unit for
programmable special functions is programmed, the
following lighting facilities can be actuated in the
event of special alarm flashing:
- Main beam,
- Fog lights and
-Turn signals
The special alarm flashing function is used,
e.g. in emergency vehicles.
Hazard warning flashing
The onboard supply control unit receives the hazard
warning flashing signal from the control unit for
middle of dash panel J819, which reads in the signals
from the hazard warning lights button E229. The
onboard supply control unit then actuates all turn
signals.
No bulb monitoring is carried out during hazard
warning flashing. The hazard warning flashing
function is always operational.
Control unit for
programmable special
functions
Onboard supply control unit
Bulbs
S370_009
Control unit for middle of dash panel
Hazard warning lights
button E229
Onboard supply control
unit J519
22
Turn signal bulbs
S370_010
Direction indication
The signal for direction indication is received by the
onboard supply control unit from the steering column
electronics control unit J527, which reads in the signals
from the turn signal switch E2 in voltage-coded form.
The electronic ignition lock (EIL) D9 transfers the
signals from the CAN drive data bus to the CAN
convenience data bus. The onboard supply control
unit actuates the turn signal bulbs as requested.
During direction indication, the turn signal bulbs are
monitored for bulb failure.
The bulbs' flashing frequency is doubled in the event
of bulb failure. Actuation of the turn signal warning
lamps is carried out via the CAN convenience data
bus and the control unit in the dash panel insert. The
direction indication function is only active in the case
of "terminal 15 on".
Steering column electronics control unit J527
Turn signal switch E2
Onboard supply control unit J519
Turn signal bulbs, right
CAN drive data bus CAN convenience data bus
S370_011
23
Vehicle electrical system
ATA alarm flashing
The ATA alarm flashing function is active if no
authorised key is located in the electronic
ignition lock (EIL).
The alarm is output via the alarm horn H12 and the
turn signals.
In this case, the roof electronics control unit transmits
a request to the onboard supply control unit via the
CAN convenience data bus. Bulb monitoring is not
carried out during ATA alarm flashing.
Roof electronics
control unit
Onboard supply control
unit
Alarm horn
Central locking feedback flashing
Unlocking the vehicle is indicated by all of the turn
signals' flashing twice. Locking the vehicle is indicated
by all of the turn signals' flashing once.
The request for central locking feedback flashing is
transmitted by the electronic ignition lock via the CAN
convenience data bus. This function is only active if no
authorised key is located in the electronic ignition
lock.
S370_012
Turn s i gnal s
Electronic
ignition lock
Onboard supply control
unit
Radio
remote control
24
S370_013
Turn s i gnals
Special direction indication
The control unit for programmable special functions is
able to request direction indication from the onboard
supply control unit. The onboard supply control unit
handles this request like a request from the steering
column electronics control units, although these
requests have priority.
The control unit for programmable special functions
does not send a request, or ends its request, as soon
as it detects a request for direction indication from the
steering column electronics control unit.
Control unit for
programmable
special functions
Onboard supply control
unit
Special hazard warning flashing
The control unit for programmable special functions is
able, like the control unit for middle of dash panel,
to request hazard warning flashing from the onboard
supply control unit.
It withdraws its request as soon as it detects a request
from the control unit for middle of dash panel.
This function is deactivated either by the control unit
for programmable special functions or by actuating
the hazard warning lights button.
Turn sig n a l s
Control unit for programmable special functions
Hazard warning
lights button
Onboard
supply
control
unit
Control unit for
middle of dash
panel
S370_014
Turn sig n a l s
S370_015
25
Vehicle electrical system
Lighting
Parking light
The left or right side light bulbs and the left or right
tail light bulbs are actuated by the onboard supply
control unit.
Light switch
The request to switch on the parking lights comes
directly from the light switch.
The parking light function is active if no authorised
key is located in the EIL.
Bulb monitoring is carried out when the parking light
function is on.
Side light and tail light
Onboard supply
control unit
S370_016
Left side light bulb Left tail light bulb
26
The left and right side and tail light bulbs are
actuated by the onboard supply control unit.
The request to switch on comes directly from the light
switch. The side and tail lights can also be switched on
if the ignition key has been removed, in which case an
acoustic signal is emitted.
Side light and tail light bulbs
Light switch
Onboard supply
control unit
S370_017
Dipped beam (driving lights)
The left and right dipped beam bulbs are actuated by
the onboard supply control unit.
The request to switch on comes directly from the light
switch. Dipped beam is switched on in the case of
"terminal 15 on" and when the switch is set to dipped
beam. The headlights, side lights, tail lights and
number plate lights are also switched on.
The side lights are switched on instead of dipped
beam in the case of "terminal 15 off".
Light switch
"Terminal 15 on"
via CAN data bus
Electronic ignition lock
Onboard supply control
unit
"Terminal 15 on" discrete
Dipped beam bulbs and
side light bulbs
Tail light bulbs
S370_018
27
Vehicle electrical system
Automatic driving lights (option)
The automatic driving lights are controlled by the rain
and light sensor G397, which automatically switches
the driving lights on and off when the light switch is
set to the "Auto" position.
The roof electronics control unit reads in the signals
from the rain and light sensor, and sends a
corresponding message on the CAN convenience
data bus. The onboard supply control unit then
supplies the dipped beam headlight bulbs with
current.
Roof electronics control unit
Light switch Onboard supply
control unit
Rain and light sensor
Dipped beam bulbs and
side light bulbs
Tail light bulbs
S370_019
28
Daylight driving lights (DDL)
The master for the daylight driving lights is the control
unit in dash panel insert, via which the following
functions are activated.
● Dipped beam
● Side lights
● Tail lig h t s
● Number plate lights
When the engine is running, "terminal 61 active" is
sent by the onboard supply control unit via the CAN
convenience data bus. The control unit in dash panel
insert then activates the daylight driving lights via the
onboard supply control unit.
The daylight driving light function can be activated
and deactivated via the control unit in dash panel
insert.
It cannot be deactivated in those countries in which
daylight driving lights are legally required!
The daylight driving lights are switched off when the
engine is switched off ("terminal 61 not active").
When the light switch is switched to the "side light" or
"dipped beam" position, the daylight driving lights
are also switched off, and the light function selected
at the light switch is active.
In countries in which daylight driving lights are legally
required, only the headlight flasher, not main beam, is
permissible when DDL is activated.
In countries in which the daylight driving lights can be
activated/deactivated by the user via the instrument
cluster, the headlight flasher and main beam are
permissible when DDL is activated. The logic for this is
contained in the control unit in dash panel insert
Alternator
Control unit in
dash panel insert
Onboard supply
control unit
Dipped beam bulbs and
side light bulbs
Tail light bulbs
S370_020
29
Vehicle electrical system
Main beam / headlight flasher
The steering column electronics control unit receives
the signals from the headlight dipper/flasher switch
E4 and, in the case of "terminal 15 on", sends
a corresponding message on the CAN convenience
data bus. The onboard supply control unit then
switches main beam or the headlight flashers on and
also sends a message on the CAN convenience data
bus, whereupon the control unit in dash panel insert
actuates the main beam warning lamp K1.
Steering column electronics control unit
Headlight dipper/flasher switch
Control unit in dash panel insert
Onboard supply
control unit
Main beam bulb
S370_021
Brake light
The brake light bulbs are actuated by the onboard
supply control unit via semi-conductors.
The request to switch on the brake lights comes
- in discrete form via brake light switch F and
- the CAN data bus via the electronic ignition lock
from the ABS control unit
- or, in vehicles without ABS, from the control unit in
dash panel insert, which reads in the information
from brake light switch F.
As soon as one of the two pieces of input information
requests brake light actuation, the brake lights are
switched on.
ABS control unit
Electronic ignition lock
Control unit in
dash panel insert
Onboard supply control unit
Brake light bulbs
Brake light switch
S370_022
30
Reversing light
The reversing light bulbs are actuated by the onboard
supply control unit. The signals from the reversing light
switch F4 are read in by the onboard supply control
unit. The "terminal 15 on" terminal status of the
electronic ignition lock D9 is transmitted via the CAN
convenience data bus.
Electronic ignition lock
Onboard supply control unit
Reversing light switch
Reversing light bulbs
S370_026
31
Vehicle electrical system
Emergency light
The objective of the emergency light function is to
avoid the failure of the vehicle's entire lighting system
due to a single fault in the control unit or implausible
signals from the light switch.
The emergency light function is only active in the case
of "terminal 15 on".
Dipped beam, the tail lights and side lights are
switched on in the event that the controller in the
onboard supply control unit fails.
The trailer tail lights are switched on in the event that
the controller in the trailer detector control unit fails.
On failure of one of the two controllers, the brake
lights are only activated via discrete signal inputs to
control units.
The emergency light function is activated in the event
of
● Implausible light switch statuses,
● Failure of the CAN data bus or
● Failure of the rain and light sensor.
Once the emergency light cause has disappeared,
the emergency light function is independently
deactivated.
The dash panel insert indicates the emergency light
function in the same manner as bulb failure.
Light switch
Onboard supply control unit
Electronic
ignition lock
Control unit in dash panel insert
ABS control unit
Front vehicle lights
Rear vehicle lights
Trailer detector
control unit
Trailer lights
S370_027
32
Trailer lighting
The trailer detector control unit J345 controls all of the
lighting functions of a trailer connected to the vehicle.
Installation location
The trailer detector control unit is located on the righthand side beneath the front left seat.
Trailer detection
Trailer detection is carried out in purely electronic
form. To do this, the brake light and the left-hand
direction indicator are briefly supplied with current
whilst switched off.
Electronic
ignition lock
Onboard supply control
unit
S370_028
The voltage level which is established is used to
determine whether a trailer is connected. If a light is
detected, a trailer is regarded as detected.
CAN convenience data busCAN drive data bus
Trailer detector
control unit
ABS control unit
Control unit in
dash panel insert
Light switch
Brake light switch
Trailer lights
S370_029
33
Vehicle electrical system
Windscreen wiper and washer system
Installation locations
Intermittent wiper switch E22
The switch is located in the steering column switch.
Intermittent wiper switch
S370_059
Wiper motor switch-over relay 1 J368 and wiper
motor switch-over relay 2 J369
The switch-over relays are located on the fuse and
relay box on the left-hand A pillar.
Wiper motor switch-over
relay 2
S370_060
Wiper motor switch-over
relay 1
34
Wiping the windscreen
The windscreen wiper is activated via the intermittent
wiper switch E22.
Depending on the variant, the signals from the
intermittent wiper switch are read in by the steering
column electronics control unit (vehicles with ABS) or
the electronic ignition lock (vehicles without ABS) and
are sent on the CAN drive data bus and the CAN
convenience data bus.
CAN convenience data bus
The onboard supply control unit receives the signals
and actuates wiper motor switch-over relay 1 J368
and wiper motor switch-over relay 2 J369. The wipers
are switched on/off via wiper motor switch-over relay
1. Wiper motor switch-over relay 2 J369 is used to
switch between the first and second wiper stage.
The onboard supply control unit is the master for this
function.
J368
V
Legend
ABattery
E22 Intermittent wiper switch
J368 Wiper motor switch-over relay 1
J369 Wiper motor switch-over relay 2
J519
J369
S
A
J519 Onboard supply control unit
J527 Steering column electronics control unit
SFuse
V Windscreen wiper motor
J527
E22
S370_061
35
Vehicle electrical system
Rain and light sensor
If the rain and light sensor G397 is installed and the
intermittent function is active, wiping is requested by
the sensor.
It is connected to the roof electronics control unit.
Data communication between the roof electronics
control unit and the onboard supply control unit takes
place via the CAN convenience data bus.
The rain and light sensor can be used to control the
interval times from "wipers off" to "continuous wiping
in stage 1 or 2".
Rain and light sensor G397
During rain sensor operation, the roof electronics
control unit acts as the master and the onboard
supply control unit as the slave.
This means that wiper control is carried out entirely by
the roof electronics control unit; the onboard supply
control unit only actuates wiper motor switch-over
relay 1 J368 and wiper motor switch-over relay 2 J369
when requested to do so by the roof electronics
control unit J528.
The "touch-wiping" and "washing" switch positions
are the exceptions.
Functional prerequisite
Communication between the onboard supply control
unit and the roof electronics control unit only takes
place if the "rain/light sensor" option has been
adapted as present in the variant coding in the EIL.
Light-emitting diode
Photo diodes
S370_084
If this is not the case, the onboard supply control unit
controls the "intermittent wiping" function as in
vehicles without a rain and light sensor.
36
Speed reduction
At a vehicle speed of < 5 km/h, the wiper speed is
reduced.
Functional prerequisite:
● Intermittent function (rain and light sensor not
installed) or
● Stage 1 or
● Stage 2
Without rain and light sensor
The wiper speed is reduced by one stage,
- From stage 2 to stage 1,
- From stage 1 to intermittent with an interval
of 6 sec.
- From intermittent with an interval of 6 sec to
intermittent with an interval of 9 sec.
Speed reduction is withdrawn again under the
following conditions:
● Vehicle speed > 8 km/h
● Actuation of the windscreen wiper switch for
intermittent mode (intermittent, stage 1, stage 2,
except touch-wiping and washing)
With rain and light sensor
If the sensor is installed, no speed reduction takes
place.
The wiping speed or intermittent interval is adapted
by the sensor as required.
J528
G397
Legend
ABattery
E22 Intermittent wiper switch
G397 Rain and light sensor
J368 Wiper motor switch-over relay 1
J369 Wiper motor switch-over relay 2
CAN convenience data bus
J519
J368 J369
V
J519 Onboard supply control unit
J527 Steering column electronics control unit
J528 Roof electronics control unit
SFuse
V Windscreen wiper motor
J527
S
A
E22
S370_062
37
Vehicle electrical system
Rear window wiper and washer system
Rear window wiper
Up to two rear window wipers may be installed.
The rear window wipers and the "rear window
washing" function are switched on and off via the
rear wiper switch E34.
The "wiping on reversing" function is automatically
switched on when reverse gear is engaged and
the windscreen wipers are active.
The onboard supply control unit is the master for these
functions and actuates both the windscreen washer
pump and the rear wipers. If the ignition (terminal 15)
is switched off whilst the rear wipers are active, the
rear wipers remain in their present position.
The rear wiper switch has the following settings:
● Wash-wipe function on with intermittent rear
wiping on
● Intermittent rear wiping on
● Intermittent rear wiping off
● Wash-wipe function on
J527
E34
Legend
A Battery
E34 Rear wiper switch
J329 Terminal 15 voltage supply relay
J519 Onboard supply control unit
CAN convenience data bus
J519
J329
S
SS
A
V92 V93
J527 Steering column electronics control unit
V92 Rear left wing door window wiper motor
V93 Rear right wing door window wiper motor
SFuse
S370_065
38
Functions
Rear wiping with windscreen wipers
switched off
When the windscreen wipers are switched off, the
rear window wiping function is carried out in
intermittent mode with the standard interval time of
6 seconds.
Windscreen wipers set to stage 1 or 2
If the windscreen wiper switch for intermittent mode is
set to stage 1 or 2, rear wiper actuation is always
synchronised with the windscreen wipers, in which
case the rear wipers only wipe for a defined
percentage of the windscreen wiper cycle.
This percentage is speed-dependent.
Rear window wiping with windscreen
wipers set to "intermittent"
When intermittent windscreen wiping is switched on,
the rear window wiping function is dependent on the
presence of a rain and light sensor.
● Without sensor: Rear wiping is synchronised with
windscreen wiping
● With sensor: Rear wiping is carried out with the
standard interval time of 6 sec.
Rear door open
The wash-wipe function is interrupted when the
vehicle is stationary and the rear door is open, and is
continued when the rear door is closed.
● v < 80 km/h: Rear wipers wipe for 1/10 of the
windscreen wiper cycle.
● v > 80 km/h: Rear wipers wipe for 1/7 of the
windscreen wiper cycle.
39
Vehicle electrical system
Heated windscreen
Function
An optional, heated windscreen may be installed; this
contains two heating elements (e. g. driver and front
passenger).
The heated windscreen is switched on and off via the
heated windscreen switch in the control unit for
middle of dash panel. The switch contains a function
indicator, which lights up when the heated windscreen
is switched on.
The maximum heating time is limited to 5 minutes.
The control unit for middle of dash panel is the master
for this function. The function request is forwarded
from the control unit for middle of dash panel to the
onboard supply control unit via the CAN convenience
data bus. The heated windscreen relay is actuated by
the onboard supply control unit.
Functional prerequisite
● Functional prerequisite for reading in the switch
and function indicator:
CAN data bus signal "terminal 61 on"
● Functional prerequisite for actuating the heated
windscreen:
CAN data bus signal "terminal 61 on"
● Idle speed stable:
The heated windscreen can only be actuated when
the engine is running at a stable speed
(approx. 800 rpm).
● Function abortion:
CAN data bus signal "terminal 61 off"
The functional prerequisite and function abortion link
takes place in the control unit for middle of dash
panel.
40
Switch for
heated windscreen
Control unit for middle of dash panel
Battery
CAN convenience data bus
Fuse
Heated
windscreen
Onboard supply control unit
Relay for heated windscreen
S370_072
Heated rear window
Function
An optional, heated rear window may be installed.
In the case of rear wing doors, the heating wires for
the heated rear window in left wing door Z26 and the
heated rear window in right wing door Z27 are wired
in parallel.
In vehicles which are fitted with optional interior
monitoring, each heating wire is individually supplied
with current.
The heated rear window is switched on and off using
the heated rear window button E230 in the control
unit for middle of dash panel J819. The button
contains a function indicator, which lights up
continuously when the heated rear window is
switched on. A fault is displayed by the indicator's
flashing. The maximum heating time is limited to 15
minutes.
The control unit for middle of dash panel is the master
for this function. The heated rear window relay J9 and
the additional relay for heated rear window J109
(with interior monitor only) are located on fuse carrier
D beneath the driver's seat. Both relays are actuated
by the onboard supply control unit.
Functional prerequisite
The functional prerequisites correspond to those for
the heated windscreen.
Heated rear window button
Control unit for middle of dash panel
Battery
Heated rear
window in left
wing door
CAN convenience data bus
Fuse
Heated rear
window in
right wing
door
Onboard supply control unit
Heated rear window relay
S370_073
41
Vehicle electrical system
Roof electronics control unit
General function
The roof electronics control unit J528 variants are
dependent on the various special equipment items
which are installed.
Depending on equipment, the control unit is
responsible for manual operation and dimming of the
interior light and reading lights plus actuation of the
rain and light sensor, anti-theft alarm system and
sliding roof. It additionally houses the microphone for
the hands-free system.
Installation location
The roof electronics control unit is located in the upper
centre of the vehicle behind the trim panel for the
interior lights and buttons.
S370_057
42
Vari ants
Standard Low line
with ATA, without glass sliding roof
Interior lighting Interior lighting Interior lighting
Separately operable reading spotlights
for
driver and front passenger
Glasses compartment
Telephone hands-free microphone Telephone hands-free microphone Telephone hands-free microphone
Switch for interior light and
reading spotlights
Interior light on/off (button) Interior light on/off (button) Interior light on/off (button)
Door contact on/off (switch) Door contact on/off (switch) Door contact on/off (switch)
Driver reading spotlight on/off (button) Driver reading spotlight on/off (button) Driver reading spotlight on/off (button)
Front passenger reading spotlight on/
off (button)
Separately operable reading spotlights
for
driver and front passenger
Switch for interior light and
reading spotlights
Front passenger reading spotlight on/
off (button)
High-line
with ATA, with glass sliding roof
Separately operable reading spotlights
for
driver and front passenger
Switch for interior light and
reading spotlights
Front passenger reading spotlight on/
off (button)
ATA interior monitor sensors (optional) ATA interior monitor sensors (optional)
Electronics incl. interface for the
rain and light sensor
Electronics for ATA/IM and interface to
the alarm horn
CAN interface CAN interface
Electronics incl. interface for the rain
and light sensor
Electronics for ATA/IM and interface to
the alarm horn
Switch for sliding roof
Evaluation of sliding roof motor
Hall senders
43
Vehicle electrical system
Actuation of the interior lights
General description
The interior lighting is switched on via an automatic
function (e.g. door open). If the interior illumination
switch is now actuated, the interior lighting is switched
off. It is only switched on again following further
actuation of the switch.
Actuation of the interior lights
The interior lights are sub-divided into two circuits.
The front circuit is influenced by the driver and front
passenger doors, the rear circuit by the left and right
sliding doors and the rear lid or rear door and the
interior illumination switch E599.
The following components are actuated by the roof
electronics control unit
- The front passenger reading light W13,
- The left interior light W16,
- The right interior light W17 and
- The driver side reading light W19.
The following components are actuated by the
onboard supply control unit
- The front interior light W1,
- The centre interior light W7 and
- The rear interior light W43.
Priorities
The following priorities apply to all front and rear interior light control system applications:
Priority Function
1 Special alarm and ATA alarm
2 Manual activation via button/switch
44
3 Automatic interior light control system (doors/sliding doors/rear door)
4 Automatic interior light control system (locking/unlocking/ignition)
Functional example
Rear sliding roof control unit
Driver side
reading light
Left interior light
Rear sliding roof motor
Front passenger reading light
Right interior light
Roof electronics control unit
Onboard supply control unit
Front interior light
Centre interior light
Driver door control unit
Front
left
entry light
Rear left
entry light
Front
right
entry light
Rear interior light
Rear right
entry light
Interior light relay
S370_058
45
Ignition lock
Electronic ignition lock
Installation location
The electronic ignition lock (EIL) D9 is located on the
right-hand side next to the steering wheel.
Variants
Different variants of the electronic ignition lock are
installed. The variant is dependent on the radio
frequency of the central locking system and the
presence of the steering column electronics control
unit.
Distinguishing features
● For vehicles with steering column electronics
control unit (vehicles with ABS/ESP) and radio
frequency of 433 MHz (Europe and other countries
which use this frequency).
● For vehicles without steering column electronics
control unit (vehicles without ABS/ESP) and radio
frequency of 433 MHz.
S370_030
● For vehicles with steering column electronics
control unit (vehicles with ABS/ESP) and radio
frequency of 315 MHz (Europe and other countries
which use this frequency).
● For vehicles without steering column electronics
control unit (vehicles without ABS/ESP) and radio
frequency of 315 MHz.
46
Immobilizer and starting fucntions
● Mounting the ignition key
● Mounting the transponder coil for polling
the ignition key ID and transponder data
● Rotary lock inhibitor in the case of an unauthorised
key
● Immobilizer communication between the ignition
key, engine control unit J623 and electronic
steering column lock control unit J764
● Reading in the steering column switch signals when
no steering column electronics control unit
is installed.
Starting
The vehicle is started via communication between the immobilizer in the electronic ignition lock with the ignition key,
the engine control unit and the electronic steering column lock control unit.
By inserting a key into the EIL, the electronics are activated and the key is supplied with energy (inductively) from
the EIL. The key is identified by means of bi-directional data exchange.
The "drive authorisation system" (DAS) in the EIL releases the control units via the CAN data bus. At the same time,
the mechanical lock (ESL, steering wheel lock) is released via a serial interface.
Key with transponder
Electronic steering column
lock control unit
Engine control unit
Electronic ignition lock
S370_055
47
Ignition lock
Central locking system functions
The electronic ignition lock (EIL) is the master control
unit for all opening and closing functions.
The vehicle can also be locked via radio remote
control.
The HF receiver is integrated into the EIL. The HF
signals are decoded exclusively by the EIL.
The resulting actuation requests are then transferred
onto the CAN convenience data bus by the EIL and
are read in by the driver door control unit J386.
The driver door control unit actuates the driver door
central locking motor V56 directly.
The onboard supply control unit actuates
- The front passenger door central
locking motor V57,
- The right sliding door central locking motor V58,
- The left sliding door central locking motor V95 and
- The rear wing door central
locking motor V96,
when the driver door control unit sends
a corresponding message on the CAN convenience
data bus.
Key with
radio remote control
Electronic ignition lock
Driver door control unit
Onboard supply control unit
Driver door contact switch
Driver door central locking motor
Front passenger door contact switch
Front passenger door central
locking motor
Rear right door contact switch
Right sliding door central locking
motor
Rear left door contact switch
Left sliding door central locking
motor
Rear right door contact switch
Rear right central locking
switch
Rear wing door central locking
S370_056
motor
48
Diagnostic interface function
Data bus systems are necessary due to the high
number of data which have to be transmitted in the
vehicle. The electronic ignition lock undertakes the
tasks of a networking gateway for data bus systems,
the principle task of which is to form the interface
between the various, independent data bus systems
in the vehicle. The electronic ignition lock is the
interface between the CAN drive data bus, the CAN
convenience data bus and the CAN diagnostic data
bus.
Amongst others, the following, logical signals are
transmitted on the CAN data bus systems by the EIL:
● Bus status signals for terminal 15 and terminal 50
● Transmission of diagnostic messages between the
VAS diagnostic tester and the individual
control units
● Wake-up signals on opening with the radio remote
control, on starting diagnosis and on insertion of
the ignition key
VAS 5 052
S370_074
49
Anti-theft system
Electronic steering column lock (ESL)
Electronic steering column lock
control unit J764
The electronic steering column lock is actuated by the
electronic ignition lock (EIL). Locking, unlocking and
diagnosis are controlled via a serial data bus link with
the EIL. The control unit is located on the steering
column and is secured with "shear head bolts".
Electronic steering column lock
control unit
Actuation
The electronic steering column lock control unit is
connected to the voltage supply via the fuse holder on
the onboard supply control unit and to earth via the
right-hand earth point in the A pillar.
Onboard supply control unit
S370_064
The actuation signals for unlocking and locking are
transmitted by the EIL via a serial data cable in the
form of encrypted data to the electronic steering
column lock control unit.
Electronic steering column lock
control unit
50
CAN convenience data bus
Electronic ignition lock
Serial data bus cable
Final control for
steering column lock
S370_075
Function
If the authorised ignition key is inserted into the
electronic ignition lock, the encrypted data are
transmitted to the electronic steering column lock via
the data cable.
If the data are recognised to be correct, the electric
motor is activated; it draws the locking bar out of the
locking ring on the steering spindle.
A terminal switch reports the released position to the
electronics. The release signal is only sent to the
electronic ignition lock when all data are recognised
as correct. The key can now be turned to position I, II
or III (position I without detent).
Before the key reaches position I, the electronic
steering lock's voltage supply is interrupted in the
electronic ignition lock.
This interruption is withdrawn when the ignition key is
turned to position 0 again.
When removing the ignition key in position 0, a signal
is sent to the electronic steering lock. The electric
motor moves the locking bar into the locking position,
in which it prevents the the locking ring from rotating.
Terminal switch
Steering tube
Locking bar
Worm gear drive
Electric motor
S370_063
51
Anti-theft system
Anti-theft alarm system
Description
The anti-theft alarm system is available as an option.
Its functions are distributed amongst several control
units. The master function is undertaken by the roof
electronics control unit J528; it is linked to all of the
other involved control units via the CAN data bus.
Installation location
The roof electronics control unit is located in the
moulded headlining near to the interior mirror.
Variants
The anti-theft alarm system is available in the
following variants:
● Electronic immobilizer, with anti-theft alarm system
● Anti-theft alarm system, interior monitor and
towing sensor
● Anti-theft alarm system, interior monitor, back-up
horn (alarm horn) and towing sensor
S370_057
52
Function
The ATA monitors the doors via the door contact
switches; the engine compartment is additionally
secured via the bonnet contact switch.
The signal from the
- Driver door contact switch F2 is read in
by the driver door control unit J386,
- Bonnet contact switch by the control unit in dash
panel insert J285.
The signals from the
- Front passenger door contact switch F3,
- Rear right door contact switch for sliding door or
side door F7,
- Rear left door contact switch for sliding door or
side door F176 and
- Rear right door contact switch F226 are read in by
the onboard supply control unit.
Activation of the ATA
The ATA can only be activated when the ignition is
switched off (terminal 15 off).
The radio remote control is used to lock the vehicle.
When all of the vehicle's doors are locked, the ATA
carries out a self-test and is activated. If not all of the
vehicle's doors are locked, the ATA cannot be
activated.
Deactivation of the ATA
The ATA is deactivated by unlocking the vehicle using
the radio remote control or via the detection of a valid
key in the EIL.
Successful locking or unlocking is acknowledged by
the turn signal lights' acknowledge signal.
Control unit in dash
panel insert
Bonnet
contact switch
Onboard supply control unit Roof electronics control unit Driver door control unit
Front passenger door
contact switch
Rear left door
contact switch
Rear right door
contact switch
Rear door
contact switch
Alarm horn
Fuse
Driver door contact
switch
S370_076
53
Anti-theft system
Interior monitor (IM)
The interior monitor monitors the interior of the vehicle
and reacts if attempts are made to penetrate the
vehicle from the outside. The alarm which is triggered
is output optically via the turn signals and constantly
illuminated interior lights and acoustically via the
horn or the optional alarm horn.
Incompletely closed windows or sliding roofs
influence the sensitivity of the interior monitor.
Interior monitor
sensors
The passenger compartment is monitored by means
of ultrasonic sensors, whilst the rear window is
monitored using the heated rear window's heating
wire. An alarm is triggered as soon as the heating
wires are separated.
The interior monitor is activated approx. 40 seconds
after the vehicle has been locked.
Interior monitor
sensors
54
S370_024
Deactivation
If the interior monitor deactivation switch E183 is
actuated when terminal 15 is switched off and the IM
is not active, the interior monitor is deactivated until
terminal 15 is switched on again.
The warning lamp lights up for 5 sec. to confirm this.
S370_077
Towing sensor
The vehicle inclination sender G384 is located in the
roof electronics control unit. The sender reports
a change in position as soon as the vehicle is raised
for towing or to unbolt the wheels, in which case the
roof electronics control unit triggers an alarm.
The towning sensor is activated approx. 20 seconds
after the vehicle has been locked.
Normal vehicle position Vehicle raised
Following ATA activation, the vehicle inclination
sender determines the relative resting position of the
vehicle (zero level). An alarm is triggered as soon as
the vehicle's position changes by an angle of more
than 0.8°.
Once the alarm has been triggered, the current angle
is taken over as the zero level.
Deactivation
If the deactivation button for vehicle inclination
sender E360 is actuated when terminal 15 is switched
off and the ATA is not active, the vehicle inclination
sender is deactivated until terminal 15 is switched on
again. The warning lamp lights up for 5 sec. to
confirm this.
S370_025
S370_023
55
Dash panel
Control unit in dash panel insert
Variants
The control unit in dash panel insert J285 is available in
- Low line and
- High line variants.
Low line variant
Warning lamps
Rev. counter G5 Speedometer G21
Segmented display
The low line variant is equipped with:
Dial gauges
● Rev. counter G5
● Speedometer G21
Segmented display
● Fuel gauge
(bar scale)
● Odometer
● Trip o domet er
● Time
● Exterior temperature
● Menu displays
● Gear indicator for automated
Warni n g lamps
● Bulb failure
● Door open warning lamp
● TCS/ ESP/BAS
● Coolant temperature
● Coolant level
● Air filter soiled
● Washer fluid level
● Brake pad wear
● Engine start/stop
● Working speed governor
● ESP
● Reserve fuel
● Particulate filter
● Glow period warning lamp
● EOBD
● ABS
● Turn signals/hazard warning lights
● Main beam
● Brake fluid -
parking brake warning lamp
● Glowing
● Airbag
● Seat belt warning
manual gearbox
S370_066
56
High line variant
Warni n g l a m p s
Rev. counter G5
Multi-function display, lower section
The high line variant is equipped
with:
Dial gauges
● Rev. counter G5
● Speedometer G21
● Fuel gauge G1
Lower display
● Time
● Gear indicator for automated
manual gearbox
● Exterior temperature indicator
● Speed
Multi-function display, upper section
Upper display
● Odometer
● Trip odometer
● Menu displays
● ESI display
Warn ing la m ps
● Glow period display
● ESP
● Left direction indicator
● ABS
● Tyre pressure warning lamp
● Main beam
● Right direction indicator
● Seat belt warning
S370_067
Speedometer G21
● Parking brake
● Daylight driving lights
● Brake lining, brake fluid, electronic
brake pressure distribution
● EOBD
57
Dash panel
Menu display in low line variant
In the low line variant, the following menus can be
called up by actuating the "menu button" in the
segmented display:
● Read service date Actuate the menu button until the remaining distance
in kilometres or the remaining time in days is
displayed.
● Pre-select/set auxiliary heater activation time Actuate the menu button until the "auxiliary heater"
symbol is shown in the segmented display; a pre-set
starting time can then be selected with the
+ or - button.
● Set time Actuate the menu button until the hours display
flashes. The + and - buttons can then be used to set
the hour. The minutes display can then be set via the
reset button and the + and - buttons.
58
● Set date Actuate the menu button until the day display flashes.
The + and - buttons can then be used to set the day.
The month and year display can then be set via the
reset button and the + and - buttons.
Menu display in high line variant
Multi-function buttons
The high line variant is equipped with multi-function
buttons in the steering wheel for controlling the
menus. The buttons can be used to select the menus
and to carry out the desired settings in the selected
menu.
S370_032
Menu selection
Starting from the basic mask, various setting and
information menus can be switched through in the
display during vehicle operation by changing the
display level with the multi-function buttons in the
steering wheel. These are shown exclusively in the
upper area of the display; the exterior temperature,
time, gear and gearbox programme are constantly
shown in the lower status area.
Only those functions whose systems are actually fitted
in the vehicle are run through. The precise procedure
is described in the operating instructions.
DOWN
UP
No
malfunction
Settings
Reset
Press reset
button
for 3 s
S370_031
59
Convenience systems
Parking aid
Description
The Volkswagen Crafter can be optionally equipped
with an ultrasound-based parking aid at the front and
rear. The system can be manually deactivated using
a button.
The parking aid displays are located on the
instrument panel and in the outside rear-view mirrors.
If the distance between the vehicle and an obstacle is
less than 40 cm, an acoustic warning is sounded.
Installation location
The parking aid control unit J446 is located on the
right-hand side beneath the front left seat.
Parking aid button E226
The button is located in the control unit for middle of
dash panel J819 and serves to switch the parking aid
off and on manually. The status is indicated via an
LED in the button.
LED illuminated: System off
LED not illuminated: System active
S370_034
S370_035
60
Warning displ ays
In the case of the parking aid, obstacles are displayed
using one double and two individual warning
elements.
The front left parking aid display Y13 and the front
right parking aid display Y14 for the front area are
positioned centrally on the instrument panel.
The control segments show the distance between the
sensors and the obstacle on the left and right sides of
the vehicle.
S370_036
The rear left parking aid display Y27 and the rear
right parking aid display Y28 for the rear area are
housed in the left and right outside rear-view mirrors
respectively.
S370_037
Displays
The warning display for each side of the vehicle is sub-divided into five yellow and two red segments.
When the yellow "ready" displays light up, the parking aid is ready to measure. If only the red segments light up,
a malfunction is present.
61
Convenience systems
Functional check
After the ignition has been switched on, "terminal 15
on", the parking aid control unit J446 actuates all
parking aid displays for approx. 1 second.
The correct function of the system is optically
confirmed by the LEDs' lighting up.
Operational readiness
The system is ready to operate when the ignition has
been switched on, the parking brake has been
released and the vehicle speed is < 18 km/h.
In vehicles with a manual gearbox, the front and rear
display units are activated when reverse gear is
engaged.
The control unit, the sensors, the cables to the sensors,
the parking aid displays and the cables to the
displays are checked.
If reverse gear is not engaged, only the front display
units are active.
System activation is indicated by the rectangular,
yellow LEDs.
62
S370_039
Activation of the functions:
Trailer operation
If a trailer is connected to the vehicle, the parking aid
is switched off. The presence of a trailer is detected
via the trailer detector control unit J345.
The trailer detector control unit makes this information
available on the CAN convenience data bus.
Vehicle stat ion ar y
Speed-dependent
The system is active until a speed of approx.
18 km/h is exceeded, after which it switches the
display units to stand-by.
The display units' and sensors' voltage supply
switches off completely on exceeding a speed of
approx. 40 km/h, and switches back on again when
the vehicle speed falls below approx. 40 km/h.
The warning elements are only switched on again
when the vehicle speed falls below 16 km/h.
Reverse gear engaged
The statuses of the handbrake warning switch F9 and
the wheel speed sensors are evaluated. If the value of
the wheel speed sensors does not change in three
successive measurements, no new, acoustic warnings
are emitted, but current ones are carried out to
completion.
All optical warnings are also suppressed. The parking
aid is activated again when the handbrake is released
or the vehicle moves off.
In vehicles with a manual gearbox, the front and rear
warning elements are active when reverse gear is
engaged. If reverse gear is not engaged, only the
front area is monitored (exception: Rolling-back
warning). If the vehicle is reversing and the steering
angle lies within a defined range, acoustic warnings
in the front area are suppressed. Optically, however,
the distances are displayed in full.
63
Convenience systems
Detection range
Six sensors are mounted in the front bumper and four
in the rear bumper to detect obstacles. The two outer
sensors at the front additionally serve to protect the
corners vehicle front swivel range).
Four sensors in the rear bumper are sufficient, as the
corner area is covered by the side mirrors in this case.
S6
S5
S4
S3
S2
S1
Displaying obstacles
There is a left and right-hand detection range in front
of and behind the vehicle. The more the distance
decreases, the more segments are activated.
The vehicle corner measuring range starts at
a distance of 65 cm at the front and 100 cm at the
rear.
S4
S3
S2
S1
S370_033
The display range emcompasses 7 LEDs, in which case
5 yellow LEDs cover an obstacle distance of approx.
40 cm and 100 cm at the front and 180 cm at the rear.
The 30 cm to 40 cm range is depicted by 2 red LEDs.
64
Warning display Optical
front S1 and S6
1st segment, yellow < 100 cm < 180 cm
2nd segment, yellow < 85 cm < 100 cm
3rd segment, yellow < 65 cm < 70 cm < 100 cm < 100 cm
4th segment, yellow < 55 cm < 60 cm < 70 cm < 70 cm
5th segment, yellow < 45 cm < 50 cm < 50 cm < 50 cm
6th segment, red < 35 cm < 40 cm < 40 cm < 40 cm < 40 cm intermittent
7th segment, red < 25 cm < 30 cm < 30 cm < 30 cm Continuous
Optical
front S2 to S5
Optical
rear S1 and S4
Optical
rear S2 and S3
Acoustic sound
Rolling-back warning
If the vehicle's rolling back is detected by the parking
aid when reverse gear is not engaged
(via evaluation of the wheel speed sensors), proximity
warning for the rear area is activated.
Minimum height of obstacles
Due to the particular physical characteristics of the
ultrasonic signals emitted by the sensors, the system
cannot always reliably detect obstacles which are
lower than the height at which the sensors are
installed (approx. 50 cm depending on load).
If an obstacle is located a maximum of 80 cm away,
all of the warning segments light up and the
continuous warning tone is sounded.
50 cm
The parking aid cannot replace the driver's attentiveness. The driver bears responsibility during parking
and similar driving manoeuvres.
50 cm
S370_038
65
Convenience systems
Tyre pressure monitor
Function
The tyre pressure monitor serves to constantly monitor
the tyre inflation pressure during vehicle operation.
At certain intervals, the tyre pressure of each wheel is
recorded by the tyre pressure sensors G222 - G225
and is transmitted, via the front and rear tyre pressure
monitor aerials, R95 and R96, and a LIN data bus
link, to the tyre pressure monitor control unit J502.
Installation location
The tyre pressure monitor control unit J502 is located
in the centre under the left front seat.
In the event of pressure loss, a warning message is
indicated in the upper section of the multi-function
display and via the tyre pressure warning lamp K230.
66
S370_040
Front and rear tyre pressure monitor
aerials R95 and R96
The front aerial is located in the engine compartment
next to the passenger compartment fan. The rear
aerial is located between the rear wheels. They
receive the tyre pressure sensor signals and forward
these to the tyre pressure monitor control unit via the
LIN data bus.
S370_078
Tyre pressure sensors
G222 - G225
The sensors are located in the wheel rims and transmit
data to the aerials via radio. Each sensor has an
individual serial number (ID), which is recorded by the
tyre pressure monitor control unit during calibration.
Based on this ID, the control unit is able to assign the
individual data to the wheels. Depending on the
country in which the system is used, the transmission
frequency is 315 MHz or 433 MHz.
S370_041
With regard to renewing batteries, please note the instructions in the electronic repair information
system (ELSA) or in the operating instructions.
67
Convenience systems
Overview of the system
Front right tyre pressure
sensor G223
Dash panel
Front left tyre pressure
sensor G222
Front tyre pressure
monitor aerial R95
LIN data bus
CAN data bus
Rear right tyre pressure
sensor G225
Rear tyre pressure
monitor aerial R96
LIN data bus
Tyre pressure monitor
control unit J502
Rear left tyre pressure
sensor G224
S370_042
Calibration
The system automatically detects the new tyre inflation
pressures
after
- The tyre pressure has been increased,
- Wheels or tyres have been renewed or
- New wheels or tyres have been fitted.
Please refer to the electronic repair information system (ELSA) or the operating instructions for
the procedure for calibrating new tyre inflation pressures.
If automatic detection is not carried out, the system
can be re-calibrated in the dash panel.
The system initialisation time may take up to 15
minutes.
68
Warnings
Soft warning
The operating status "soft warning" describes
a pressure loss in which operating safety is still
guaranteed. At the end of the journey,
a request for the driver to correct the tyre inflation
pressure at the next opportunity appears in the upper
section of the multi-function display. This message is
displayed for approx. 30 sec. when the ignition is
switched off ("terminal 15 off").
Hard warning
The operating status "hard warning" describes
a pressure loss in which operating safety is no longer
fully guaranteed. In the upper section of the multifunction display, the driver is requested, during
vehicle operation, to check the tyres.
A "hard warning" is triggered when one of the
following conditions is met:
The "soft warning" is triggered when the temperaturecompensated tyre pressure has fallen by more than
0.25 bar in comparison with the inflation pressure.
No single tyre is specified; all tyre pressures have to
be checked.
The warning is displayed until the ignition is switched
off (terminal 15 off).
If the ignition is switched off and on again, the tyre
pressure warning lamp is actuated immediately.
The warning in the upper section of the multi-function
display is active again after travelling for approx.
5min.
● The tyre pressure falls below 2.6 bar.
● The tyre pressure falls by 20% in comparison with
the inflation pressure (max. 0.5 bar).
In parallel with the "hard warning", the tyre pressure
warning lamp is actuated.
This actuation is only withdrawn following
re-activation of the system or when pressure
correction has been determined by the system.
In the case of the "hard warning" operating status,
the affected tyre is specified in the multi-function
display.
69
Convenience systems
RCD 2001
Radio system RCD 2001 is equipped with an audio CD
drive and a CD changer connection. The radio unit
has a single FM and AM tuner and a TP/TA traffic
radio function.
The display is monochromatic and dimmable;
connection of a CD changer, a mobile telephone
operating electronics control unit or a telephone mute
switch via a discrete cable connection is possible. RCD
2001 is integrated into CAN data bus communication
via the CAN convenience data bus and is therefore
diagnosis-capable.
Four channels, which are wired depending on the
equipment which is fitted, are available as
loudspeaker outputs.
The HF connection is provided by a passive rod aerial
on the roof.
Operation is carried out via:
- Three buttons for audio source selection (FM, AM
and CD),
- A button for ejecting the audio CD,
- Five memory buttons beneath the display,
- A button for the sound menu,
- A button for muting,
- On the left-hand side, a rotary push-button for
switching on and off and for regulating the volume,
- On the right-hand side, a multi-function button and
a SCAN button.
70
S370_043
RCD 4001
Radio system RCD 4001 is based on RCD 2001, but is
additionally equipped with a MOST data bus
interface via which a CD changer and a mobile
telephone can be connected.
The display is characterised by good legibility in the
case of high light incidence.
Four channels, which are wired depending on the
equipment which is fitted, are available as
loudspeaker outputs.
Operation is carried out via:
- The telephone buttons on the right-hand side,
- Four function buttons beneath the display,
- Eight function buttons on the left-hand side,
- A button for ejecting the CD beneath the display,
- A multi-function button at the bottom right for
operating the telephone and
- The rotary push-button at the bottom left for
switching on and off and for regulating the volume.
S370_045
71
Convenience systems
RNS 4001
Radio/navigation system RNS 4001 is based on the
RCD 4001, but its functions are extended by a
navigation system with arrow depictions.
The display is characterised by good legibility in the
case of high light incidence.
Four channels, which are wired depending on the
equipment which is fitted, are available as
loudspeaker outputs.
Operation is carried out via:
- The telephone buttons on the right-hand side,
- Four function buttons for activating the navigation
functions, muting and operating the telephone plus
a button for ejecting the CD beneath the display,
- Eight function buttons on the left-hand side,
- Function buttons on the left and right next to the
display,
- A multi-function button for operating the
navigation unit at the bottom right and
- The rotary push-button at the bottom left for
switching on and off and for regulating the volume.
72
S370_044
RNS 5001
Radio/navigation system RNS 5001 is based on the
RNS 4001, but is equipped with map depiction
instead of arrow navigation and with a DVD player
instead of the CD player.
A 6.5'' TFT colour display is installed; four channels,
which are wired depending on the equipment which is
fitted, are available as loudspeaker outputs.
Operation is carried out via:
- The telephone buttons on the right-hand side,
- Four function buttons for activating the navigation
functions, muting and operating the telephone plus
a button for ejecting the CD/DVD beneath the
display,
- Eight function buttons on the left-hand side,
- Function buttons on both the left and right next to
the display,
- A multi-function button for operating the
navigation unit at the bottom right and
- The rotary push-button at the bottom left for
switching on and off and for regulating the volume.
S370_046
73
Convenience systems
CD changer R41
The Crafter can be fitted with an optional 6-fold CD
changer (not with RCD 2001). The CD changer is
equipped with an automatic magazine for six CDs,
which are loaded via a central intake shaft.
The 6 selection buttons which are available can be
used to load and remove the CDs individually or all at
once.
The CD changer is controlled via the RCD or RNS unit
which is connected. The CD changer is able to
transmit digital audio signals in stereo and Dolby
Surround®. The connection to the RCD/RNS is carried
out via the MOST data bus.
S370_047
Supplementary blower for
radio
Supplementary blower for radio V384 is fitted in
combination with a radio unit in vehicles which are
equipped with rear loudspeakers.
The supplementary blower is supplied with current via
the circuit output for the aerial amplifier.
S370_048
74
Telephone
Preparation for mobile telephone installation is
optionally available. This preparation for mobile
telephone installation is linked, via the MOST bus,
to the RCD/RNS and therefore to the CAN
convenience data bus. Telephone data and
information can therefore be displayed in the dash
panel insert display.
If a mobile telephone is located in the mobile
telephone bracket, the multi-function steering wheel
or the RCD/RNS buttons can be used to make calls
and accept calls.
Telephone microphone R38 is located in the roof
electronics control unit and is oriented towards the
driver. The audio system's loudspeakers are used for
listening. When a call is made or received, the radio
or CD are muted; navigation system messages have
priority.
Roof electronics control unit
Steering column electronics control unit
Multi-function buttons in the steering wheel
Control unit in dash panel insert
Mobile telephone bracket
Control unit with display for
radio and navigation
Mobile telephone
operating electronics
control unit
CD changer
S370_068
75
Tachograph
Tachograph control unit J621
General description
The Volkswagen Crafter can be optionally equipped
with an additional tachograph.
The tachograph is positioned in the centre console in
place of the CD changer.
Modular tachograph
The tachograph records the vehicle's speed and the
relevant driver's driving times on corresponding
control disks (tachograph disks). Records can be
documented for two drivers.
A modular and a digital tachograph are available.
The speed data are supplied by the tachograph
sender G75; the sender is fitted with a lead seal.
76
Dash panel
Tachograph control unit
Tachograph sender
S370_069
Digital tachograph
The tachograph stores the vehicle's speed and the
relevant driver's driving times. If necessary, the data
can be printed out or downloaded via a download
key and further processed on a PC.
Tachograph control unit
An authorisation card must be inserted into the device
in order to use it.
Usage can be carried out with the following
authorisation cards:
● Driver card
● Company card
● Control card
● Worksh o p card
Insert for
authorisation card
Driver card Workshop card
Work on the tachograph system must only be carried out by trained personnel.
Whoever carries out modifications which influence the recording may violate criminal and
regulatory laws.
S370_070
77
Special control units
Control unit for programmable special functions
Introduction
The control unit for programmable special functions
J820 forms the necessary interface to enable body
manufacturers and suppliers to access vehicle signals.
Installation location
The control unit for programmable special functions
J820 is located on the left-hand side beneath the front
left seat.
Connection to the CAN data bus
The control unit for programmable special functions is
connected to the CAN convenience data bus.
S370_079
78
Function
The control unit for programmable special functions
undertakes the tasks of a bi-directional gateway for
vehicle and body part information. This therefore
enables body-related intervention, e.g. into engine
functions (constant speed maintenance), or CAN data
bus information can be output (e.g. lighting or vehicle
speed).
Programming is carried out using the vehicle
diagnosis, testing and information system VAS 5051 B
or vehicle diagnosis and service information system
VAS 5052 in the service department or directly at the
body manufacturer's or supplier's premises according
to defined specifications.
The contents of the CAN data bus messages are used
as the basis of the control unit functions.
Via this, the control unit obtains information on the
vehicle's status.
This information is forwarded to the control unit's
corresponding outputs and is processed by the body's
electronic components.
The control unit for programmable special functions
may also be used to actively intervene into the vehicle
electronics.
The requests which the control unit receives via
- Discrete inputs or
- The data bus used by the body manufacturer
are forwarded via the CAN convenience data bus.
The control unit for programmable special functions is
integrated into Guided Fault Finding for diagnostic
purposes.
Please refer to the electronic repair information system (ELSA) and the body manufacturer's customer
service documents for further information on the control unit for programmable special functions.
79
Service
Diagnosis
Diagnostic equipment
To carry out diagnosis on the Volkswagen Crafter,
the vehicle diagnosis, testing and information system
VAS 5051 B or the vehicle diagnosis and service
information system VAS 5052 and, at the very least,
the basic CD V10.00.00 and brand CD V10.68.00 are
required.
Vehicle diagnosis, testing and information system
VAS 5051 B
Vehicle diagnosis and service information system VAS
5052
S370_083
80
S370_082
Adapting control units
Control units which it is sensible to retrofit (e.g. trailer
detector control unit, auxiliary heater control unit) can
be adapted in the electronic ignition lock by means of
variant coding.
Participation in communication with other control units
which are installed in the vehicle via the CAN data
bus systems is only possible following adaptation.
Renewal of immobilizer components
The following electronic components are immobilizer
components:
● Engine control unit
● Electronic steering column lock control unit
● Electronic ignition lock
● Transponder in the ignition key
Only two of these components can be renewed at the
same time. On-line adaptation then has to be carried
out.
If it is necessary to renew more than two components
(e.g. following an accident) at the same time, all
components must be renewed and must subsequently
be adapted via an on-line link to the manufacturer.
On-line adaptation
An on-line link to the vehicle manufacturer's server is
required to adapt the following control units following
renewal:
● Engine control unit J623
● Airbag control unit J234
● Electronic steering column lock control unit J764
● Electronic ignition lock D9
● Keys
81
Glossary
ADL/Auto
Automatic driving lights
OBSCU
Onboard supply control unit
CAN
Controller Area Network
ATA
Anti-theft alarm system
EIL
Electronic ignition lock
DAS
Voltage-coded light switch
The voltage input into the light switch is changed in
such a way by means of internal resistors that
a voltage value can be assigned to each switch
position. Based on these voltage values, the reading
control unit recognises the selected switch position.
Drive authorisation system
CCS
Cruise control system
IM
Interior monitor
LIN data bus link
Local Interconnect Network (see SSP 286)
DDL
Daylight driving lights
ESI
Extended servicing intervals
82
1.) Which data transmission rates do not exist in the Crafter?
a) 500 kbit/s
b) 100 kbit/s
c) 83.3 kbit/s
d) 50 kbit/s
Test yourself
2.) Via which control unit are the bus systems linked together?
a) J533 – data bus diagnostic interface
b) J285 – control unit in dash panel insert
c) D9 – electronic ignition lock
d) T16 – 16-pin connector (diagnostic connector)
3.) Which components do not belong to the CAN drive data bus?
a) J234 – airbag control unit
b) J104 – ABS control unit
c) J623 – engine control unit
d) J527 – steering column electronics control unit
Answers: 1 b; d; 2 c; 3 a
83
370
© VOLKSWAGEN AG, Wolfsburg
All rights and rights to make technical alterations reserved.
000.2811.77.20 Technical status 03.2006
Volkswagen AG
Service Training VSQ-1
Brieffach 1995
D-38436 Wolfsburg
❀ This paper was manufactured from pulp that was bleached without the use of chlorine.
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