WABCO CAN Router User manual

CAN Router
CAN Repeater
System Description
1st Edition
This publication is not subject to change procedures.
New versions can be found in INFORM under
www.wabco-auto.com
©Copyright WABCO 2010
Vehicle Control Systems
Changes are subject to change without notice
Version 001/05.10
815 010 176 3

2
CAN Router
CAN Repeater Table of contents
1 Safety information . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1 Avoiding electro-static charge and uncontrolled
discharging (ESD) . . . . . . . . . . . . . . . . . . . . . 4
2 System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.1 CAN Router . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.2 CAN Repeater . . . . . . . . . . . . . . . . . . . . . . . . 6
2.3 System prerequisites, Configuration . . . . . . . 6
2.4 Certificates. . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3 Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.1 CAN Router . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.1.1 Variants of the CAN router. . . . . . . . . . 9
3.2 CAN Repeater . . . . . . . . . . . . . . . . . . . . . . . . 9
3.2.1 Variants of the CAN repeater. . . . . . . 10
3.3 Pin assignments. . . . . . . . . . . . . . . . . . . . . . 10
3.4 Pressure sensor 441 044 101 0 / 102 0. . . . 10
3.5 Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.5.1 Power supply cable . . . . . . . . . . . . . . 11
3.5.2 Sensor cable . . . . . . . . . . . . . . . . . . . 12
4 Workshop instructions . . . . . . . . . . . . . . . . . . . . 13
4.1 Mounting and Installation. . . . . . . . . . . . . . . 13
4.1.1 Installation concept . . . . . . . . . . . . . . 13
4.1.2 Mounting the CAN Router / Repeater 14
4.1.3 Mounting the cable . . . . . . . . . . . . . . 15
4.1.4 Functional test . . . . . . . . . . . . . . . . . . 15
4.2 Fuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5 Diagnostics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5.1 Diagnostic port. . . . . . . . . . . . . . . . . . . . . . . 17
5.1.1 ISO7638 towing vehicle/trailer
interface. . . . . . . . . . . . . . . . . . . . . . . 17
5.2 Hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5.3 Diagnostic Software. . . . . . . . . . . . . . . . . . . 18
5.3.1 Diagnostic Software "Trailer CAN
Router-Repeater". . . . . . . . . . . . . . . .18
6 Appendix. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
6.1 Diagnostic messages. . . . . . . . . . . . . . . . . . 20
6.2 Drilling template . . . . . . . . . . . . . . . . . . . . . . 22
6.3 Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
6.3.1 CAN Router . . . . . . . . . . . . . . . . . . . . 24
6.3.2 CAN Repeater . . . . . . . . . . . . . . . . . . 27
1

3
1
CAN Router
CAN Repeater
Safety information
1 Safety information
This document describes the system structure, functions and components of the
CAN Router and CAN Repeater.
Read this publication thoroughly. Adhere to all instructions, information and safety
information to prevent injury to persons and damage to property.
WABCO will only guarantee the security, reliability and performance of their products
and systems if all information in this publication is adhered to.
• Only trained and qualified technicians are to perform any work on the vehicle.
• Make sure to follow the specifications and instructions of the vehicle manufacturer.
• Maintain all accident regulations of the business as well as regional and national
regulations.
• Wear suitable protective clothing when necessary.
• Your workspace must be dry as well as sufficiently illuminated and ventilated.
Risk of injury! Pedal actuations can lead to severe injuries if persons are in the vicinity of the
vehicle.
Make sure that pedals cannot be actuated as follows:
– Switch the transmission to "neutral" and actuate the hand brake.
– Secure the vehicle against rolling with chocks.
– Fasten a visible note to the steering wheel indicating the work is being performed
on the vehicle and that the pedals are not to be actuated.
– Do not wear a tie, loose clothing, open hair, arm bands, etc. when working on the
vehicle, especially with the engine running. Keep your hands and hair away from
the moving parts.
Fire hazard! – Use only ground lights.
– Keep flammable material (cloths, paper, etc.) away from the exhaust system.
– Do not smoke in the workplace.
– Check electrical lines for proper insulation and fastening.

4
1CAN Router
CAN Repeater Safety information
1.1 Avoiding electro-static charge and uncontrolled discharging (ESD)
Note during
construction and
building the vehicle:
– Prevent potential differences between components (e. g. axles) and the vehicle
frame (Chassis).
Make sure that the resistance between metallic parts of the components to the
vehicle frame is lower than 10 Ohm (< 10 Ohm).
Connect moving or insulated vehicle parts such as axles electrically conductive
with the frame.
– Prevent potential differences between the towing vehicle and the trailer.
Make sure that an electrically conductive connection is made via the coupling
(king pin, fifth wheel, claws with pins), even with no cable connection.
– Use electrically conductive bolted connections when fastening the ECUs to the
vehicle frame.
– Use only cable conforming to WABCO specifications or WABCO original cable.
– Run the cable in metallic casing if at all possible (e. g. inside the U-beam) or
behind metallic and grounded protective plating, to minimize the influence of
electro-magnetic fields.
– Avoid the use of plastic materials if they can cause electrostatic charging.
Note during repair and
welding work on the
vehicle:
– Disconnect the battery - if installed in the vehicle.
– Disconnect cable connections to devices and components and protect the plug-
ins and connections from contamination and humidity.
– Always connect the grounding electrode directly with the metal next to the weld-
ing position when welding, to prevent magnetic fields and current flow via the
cable or components.
Make sure that current is well conducted by removing paint or rust.
– Prevent heat influences on devices and cabling when welding.

5
2
CAN Router
CAN Repeater
System
2 System
2.1 CAN Router
With special vehicle concepts such as e.g. Eurocombis or Roadtrains, the utilisation
of multiple Trailer EBS systems on different axle units or trailer modules is required.
To supply the brake modulators with CAN signals in accordance with ISO 11992 and
supply voltage, an additional device is required. WABCO provides a solution in the
CAN Router, with which up to four CAN routers in series can supply up to five Trailer
EBS modulators.
The CAN brake signal of the towing vehicle is received by the CAN Router and
distributed to the Trailer EBS modulators.
Fig. Using a CAN router (1) in a "Eurocombi" tractor-trailer combination with two Trailer EBS
modulators (2)
CAN router with
pressure sensor
If the CAN signal of the towing vehicle is not available, a pressure sensor that can be
connected as an option generates the control pressure for the yellow hose coupling
as a CAN signal and sends it through the CAN router to the Trailer EBS E1 modulator
connected to the "Power OUT1" output to optimise timing.
Fig. Using a CAN router (1) with optional external pressure sensor (3) in a Flat Bed Trailer
with two Trailer EBS E1 modulators (2)
122
122
3

6
2CAN Router
CAN Repeater System
2.2 CAN Repeater
The CAN repeater is designed for the CAN signal transfer in overlength vehicles,
such as telescoping trailers. Its task is to amplify the CAN signal to ensure the supply
for the connected Trailer EBS over greater distances.
This is required technically as well as for legal reasons, since based on ECE R 13,
the CAN line in the trailer vehicle is only allowed to be a maximum of 18 m on trailer
vehicles without using a CAN repeater. With a CAN repeater connected, the cable
length can be extended by up to 80 meters after the CAN repeater.
The CAN repeater is equipped with a connection for an external pressure sensor.
This pressure sensor generates the brake pressure set value as a CAN signal and
sends it to the downstream Trailer EBS E1 modulator to guarantee the required
timing in accordance with ECE R 13.
This way, the trailer can be used with towing vehicles with no CAN brake signalling
as well.
Fig. Operation of a CAN repeater (1) with optional external pressure sensor (3) in an
overlength trailer with Trailer EBS E1 (2)
2.3 System prerequisites, Configuration
The CAN router / -repeater is used with the WABCO electronic braking system (T-
EBS) of generations E and D.
Using trailers with CAN routers/-repeaters is permitted on towing vehicles with CAN
interfaces, with at least a pneumatic control line.
On trailers with Trailer EBS E1, an external pressure sensor can be connected to the
CAN router/-repeater. This pressure sensor generates the brake pressure set value
as a CAN signal to optimise the timing in accordance with ECE R 13 behind the
towing vehicle without CAN brake signalling.
!The use of the external pressure sensor with CAN router/-repeater is only
possible in combination with Trailer EBS E1 (software version as of TE001418).
Trailers with 2× trailer
EBS E1
The CAN brake signal of the towing vehicle is received by the CAN Router and
distributed to both T-EBS E1 modulators. If the CAN signal is not available from the
towing vehicle, the front T-EBS E1 modulator brakes via the yellow control line while
the rear T-EBS E1 modulator brakes via the CAN signal, which the external pressure
generates.
Overlength trailers The CAN repeater amplifies the CAN signal for overlength trailers. If T-EBS E1 is
installed, the same external pressure sensor is used for optimising the timing when
there is no CAN signal from the towing vehicle.
The CAN router/-repeater in
• EuroCombis or Roadtrains,
12
3

7
2
CAN Router
CAN Repeater
System
• Trailers with two modulators T-EBS E0 / D,
• Overlength trailers with T-EBS E0 / D
only functions if the towing vehicle is equipped with CAN.
CAN router/-repeater in combination with WABCO Trailer EBS
2.4 Certificates
Certificates for CAN router and CAN repeater
– Open the WABCO website www.wabco-auto.com
– Click on the INFORM product catalogue in the quick-access area and then on
Index
– Enter the words CAN router or CAN repeater in the search field.
CAN Router Using the CAN router in vehicle combinations with a trailer and more than one Trailer
EBS E1 modulator is approved with the TÜV certificate EB124.5E (with KBA
release).
To use the CAN router in vehicle combinations with multiple trailers, there is no
certificate based on ECE R 13. WABCO does provide the TÜV certificate
EB124_CanRou_0E however (no KBA release) indicating the full functionality of the
unit. This informal certificate serves as proof for individual acceptance, that all
respective requirements of the towing vehicle (disconnected supply line to second
trailer, etc.) are met by the system.
!When using the CAN router for vehicle combinations with more than one trailer,
an individual acceptance must be performed for the vehicle.
CAN Repeater For using the CAN repeater in combination with the T-EBS E modulator, the
certificate EB124.5E conforming to ECE R 13 is available.
Type Trailer Trailer EBS Variants CAN
router/-repeater
Connection
external pressure
sensor
Connecting a CAN
router/-repeater
EuroCombi or
Roadtrain
T-EBS E1
T-EBS E0
T-EBS D
CAN Router
446 122 050 / 052 0 –
1st Trailer on connection
Power OUT1,
2nd Trailer on connection
Power OUT2
Trailer vehicle with 2× T-
EBS (e.g. Flat Bed
Trailer)
T-EBS E1 CAN Router
446 122 054 0
on CAN router Rear T-EBS modulator on
connection Power OUT1,
Front T-EBS modulator on
connection Power OUT2
T-EBS E0
T-EBS D
CAN Router
446 122 054 0
on T-EBS modulator
Overlength trailer (e.g.
timber trailers)
T-EBS E1 CAN Repeater
446 122 051 / 053 0
on CAN Repeater T-EBS modulator on
connection Power OUT1
T-EBS E0
T-EBS D
CAN Repeater
446 122 051 / 053 0
on T-EBS modulator

8
3CAN Router
CAN Repeater Components
3 Components
3.1 CAN Router
The CAN router (446 122 050 0 / 052 0) mainly consists of the ECU and three
connecting cables (Z, X1, X2) with 7-pin DIN bayonet plugs. With version 446 122
054 0, there is another connecting cable (Y) to an external nominal pressure sensor.
Electrical connections To identify the connections, the connection designations are shown on a sticker on
the housing cover and on small tags on the connectors.
Z
X1
X2
Y
Pos. Connection
designation Function Connection cable
ZPower IN Power supply (ISO 7638) from tow
vehicle
449 133 … 0 / 449 135 … 0 (for semitrailer)
449 231 … 0 / 449 233 … 0 (for drawbar trailer)
X1 Power OUT1 Connection T-EBS modulator 449 347 … 0 (for T-EBS E)
449 333 … 0 (for T-EBS D)
X2 Power OUT2 Connection T-EBS modulator
Connection for next trailer 449 135 … 0
YPressure
sensor
Connection of the external nominal
pressure sensor (only as of T-EBS
E1)
449 425 … 0

9
3
CAN Router
CAN Repeater
Components
3.1.1 Variants of the CAN router
3.2 CAN Repeater
The CAN repeater (446 122 051 0 / 053 0) mainly consists of the ECU with two
connecting cables (Z, X1) with 7-pin DIN bayonet plug-in connectors and the
connecting cable (Y) for the external nominal pressure sensor.
Electrical connections To identify the connections, the connection designations are shown on a sticker on
the housing cover and on small tags on the connectors.
WABCO number Housing symbol
Electrical connections (DIN bayonet)
Z - Power IN X1 - Power OUT1
X2 - Power OUT2 Y - Pressure sensor
446 122 050 0 Socket Connector –
446 122 052 0 Connector Connector –
446 122 054 0 Connector Connector Socket
X1
Z
Y
Pos. Connection
designation Function Connection cable
ZPower IN Power supply (ISO 7638) from tow
vehicle
449 133 … 0 / 449 135 … 0 (for semitrailer)
449 231 … 0 / 449 233 … 0 (for drawbar trailer)
X1 Power OUT1 Connection T-EBS modulator 449 347 … 0 (for T-EBS E)
449 333 … 0 (for T-EBS D)
YPressure
sensor
Connection of the external nominal
pressure sensor (only as of T-EBS
E1)
449 425 … 0

10
3CAN Router
CAN Repeater Components
3.2.1 Variants of the CAN repeater
3.3 Pin assignments
3.4 Pressure sensor 441 044 101 0 / 102 0
The pressure sensor generates the nominal brake pressure value as a CAN signal
on towing vehicles with no CAN line or on overlength trailers in order to meet the
necessary timing requirements in accordance with ECE R 13.
In connection with the Trailer EBS E1, the external pressure sensor is connected to
the yellow hose fitting and to connection Y "Pressure sensor" of the CAN router/-
repeater. With a Trailer EBS of the D generation, the pressure sensor is connected
to the "IN/OUT 2" connector of the T-EBS modulator.
!As of version 1.5 of the Trailer EBS E (production date from CW 49/2009), in the
diagnostic software "Trailer EBS E" with connected external pressure sensor on
the CAN router/-repeater, select setting: "Nominal pressure sensor on R/R" to
improve the communication between the devices.
WABCO number Housing symbol Electrical connections (DIN bayonet)
Z - Power IN X1 - Power OUT1 Y - Pressure sensor
446 122 051 0 Socket Connector Socket
446 122 053 0 Connector Connector Socket
Pos. Connection
designation Connector PIN Application
ZPower IN 1CAN Low
2CAN High
3WALA
4GND (Term. 15)
5GND
6Pin 15
7Pin 30
X1 / X2 Power OUT1 /
Power OUT2
1CAN Low
2CAN High
3WALA
4GND (Term. 15)
5GND
6Pin 15
7Pin 30
YPressure sensor 1Sensor SUPPLY
2GND
3Sensor IN

11
3
CAN Router
CAN Repeater
Components
3.5 Cable
Fig. Cabling a CAN router (1) in a "Eurocombi" tractor-trailer combination with two Trailer EBS modulators (2)
Fig. Cabling a CAN router (1) with optional external pressure sensor (3) in a Flat Bed Trailer with two Trailer EBS E1
modulators (2)
3.5.1 Power supply cable
Pos. Component Pos. Cable family
1CAN Router 4449 133 … 0 / 449 135 … 0 (for semitrailer)
449 231 … 0 / 449 233 … 0 (for drawbar trailer)
2Trailer EBS E Modulator 5449 135 … 0
449 231 … 0
3Pressure sensor 6449 347 … 0 (for T-EBS E)
449 333 … 0 (for T-EBS D)
7449 425 … 0
8
449 173 … 0 (for semitrailers with T-EBS E)
449 273 … 0 (for drawbar trailers with T-EBS E)
449 172 … 0 (for semitrailers with T-EBS D)
449 272 … 0 (for drawbar trailers with T-EBS D)
Cable WABCO no. L in m Cable ends - Design
Power IN semitrailer (permitted total length max. 18 m)
449 133 003 0 0,3
Socket
ISO 7638
Connector
DIN bayonet
7-pin
449 133 030 0 3,0
449 133 120 0 12,0
449 133 150 0 15,0
1224 6
58
1
2
2
3
4
67 6
1

12
3CAN Router
CAN Repeater Components
3.5.2 Sensor cable
Power IN semitrailer (permitted total length max. 18 m)
Power OUT2 (permitted total length max. 15 m)
449 135 005 0 0,5 Socket
ISO 7638
Socket
DIN bayonet
7-pin
449 135 025 0 2,5
449 135 060 0 6,0
Power IN drawbar trailer (permitted total length max. 18 m)
449 231 060 0 6,0 Connector
ISO 7638
Socket
DIN bayonet
7-pin
449 231 120 0 12,0
Power IN drawbar trailer (permitted total length max. 18 m)
449 233 030 0 3,0
Connector
ISO 7638
Connector
DIN bayonet
7-pin
449 233 100 0 10,0
449 233 140 0 14,0
449 233 180 0 18,0
Power OUT1 (with connection, permitted total length
max. 80 m)
449 347 003 0 0,3 Socket
DIN bayonet
7-pin
T-EBS E
8-pin
Cod. B
449 347 025 0 2,5
449 347 080 0 8,0
Power OUT1 (permitted total length max. 80 m)
449 333 003 0 0,3
Socket
DIN bayonet
7-pin
T-EBS D
"Power"
449 333 025 0 2,5
449 333 055 0 5,5
449 333 120 0 12,0
Cable WABCO no. L in m Cable ends - Design
Connecting cable Pressure sensor
449 425 030 0 3,0 Socket
DIN bayonet
Connector
DIN bayonet
449 425 060 0 6,0
Cable WABCO no. L in m Cable ends - Design
1

13
4
CAN Router
CAN Repeater
Workshop instructions
4 Workshop instructions
Prior to installation, retrofitting, or repair of the CAN router/repeater, ensure
the following instructions are observed:
– Only trained and qualified personnel may perform this work.
– Make sure to follow the specifications and instructions of the vehicle
manufacturer.
– Always comply with the company and national accident prevention guidelines and
Health and Safety regulations.
– When working on the brake system, the vehicle must be secured against rolling
away.
– Wear suitable protective clothing when necessary.
– The workplace has to be dry, as well as sufficiently lit and ventilated.
– Observe the notes for avoiding electro-static charge (see chapter 1.1 „Avoiding
electro-static charge and uncontrolled discharging (ESD)“, page 4).
4.1 Mounting and Installation
4.1.1 Installation concept
Installation diagrams for CAN routers/repeaters in the various vehicle types are
located in the appendix (see chapter 6.3 „Diagram“, page 23).
– Chose the respective installation diagram for your vehicle type.
– Identify the device and the device variant on the type plate and the designation
on the device cover label.
– Make sure that the device is suitable for the desired concept and vehicle
combination (see chapter 2.3 „System prerequisites, Configuration“, page 6).
– Choose the suitable cable and pay attention to the maximum permitted total
length of the cable for the respective connection (see chapter 3.5 „Cable“,
page 11).
connection Maximum permitted total cable length
Z - Power IN <18 m
X1 - Power OUT1 <80 m
X2 - Power OUT2 <15 m
1

14
4CAN Router
CAN Repeater Workshop instructions
CAN router in
combination with Trailer
EBS
If the CAN router is used in Eurocombis or Roadtrains, make sure that the sequence
for connected T-EBS modulators is identical with the sequence of trailers.
• Power OUT1 (X1): Connection of the 1st T-EBS modulator / 1st trailer (2.1)
• Power OUT2 (X2): Connection of the 2nd T-EBS modulator / 2nd trailer (2.2)
Fig. Using the CAN router (1) in a "Eurocombi" tractor-trailer combination with two Trailer EBS modulators (2.1, 2.2)
The CAN signal that is generated by the external pressure sensor is only passed on
via the Power OUT1 (X1) connection of the CAN router:
• Power OUT1 (X1): Passing on the CAN signal from external pressure sensor
• Power OUT2 (X2): Not passing on the CAN signal from external pressure sensor
Therefore, when using the CAN router in a trailer with two T-EBS E1 modulators, the
rear modulator (2.1) is always to be connected to the Power OUT1 (X1) connection
of the CAN router (1) to achieve optimal timing.
Fig. Using the CAN router (1) with external pressure sensor (3) in a Flat Bed Trailer with two Trailer EBS E1 modulators (2.1, 2.2)
4.1.2 Mounting the CAN Router / Repeater
!Remove the POWER plug of the Trailer EBS modulator for welding work. Position
the ground connection of the welder directly next to the welding location. Always
position the ground connection for the welder directly in the vicinity of the welding
location, to prevent magnetic fields and current flow via cables or components of
the Trailer EBS.
– Disconnect the power supply to the towing vehicle. Consider any short-circuit
hazards from batteries in the towing vehicle.
– Position the device to be accessible on the vehicle frame so that changing a fuse
is possible. The installation location of the device should be parallel to the cable
route to prevent unnecessary bending radii in the connecting cable. The CAN
repeater should be mounted in the front or on the side of the trailer.
1
X2
X1 2.1 2.2
Z
1
X2
X1 2.2 2.1
3
1

15
4
CAN Router
CAN Repeater
Workshop instructions
– Use the drilling template for performing any drilling (see chapter 6.2 „Drilling
template“, page 22).
– Fasten the device on vehicle frames with two suitable screws and tighten the
screws securely.
4.1.3 Mounting the cable
– Identify the connections on the CAN router/repeater via the designations on the
labels on the housing cover and the tags on the connections.
– Remove the protective cap on the cable and connect the cable to the respective
connections.
– Press the cable into the slot applying a little initial force. All connections must be
assigned a cable or have a closing cap. A cap is provided in the delivery of the
CAN router/repeater for connection Y (external pressure sensor), in case it will
not be connected.
– Fasten the cable only on solid elements that are connected with the components,
e.g. the vehicle frame. Fastening to flexible elements can cause cable breaks and
the seal can be broken.
– Fasten the cable and plug so that no tension or lateral forces affect the plug-in
connections.
– Be sure not to route cables over sharp edges or in the vicinity of aggressive media
(e.g. acids).
– Fasten the cable a maximum of 30 cm after the device, e.g. with a cable tie. Fix
the cable ties in such a way that the cables are not damaged (if you are using
tools, please observe the instructions of the manufacturer of the cable tie).
4.1.4 Functional test
– Use the diagnostic software to test for fault-free communication between the CAN
router/repeater and the connected T-EBS modulators.
No further steps are required for starting up the CAN router/repeater.
– Check the cables for damages and make sure that the plug and the cable are
correctly connected on the device connections during general maintenance.
4.2 Fuses
The power supply lines (PIN 1 and PIN 3) between the towing vehicle and the Trailer
EBS in accordance with ISO 7638 are protected from overvoltage and short-circuits
with 4 fuses inside the CAN router/repeater.
Defective fuses are indicated in the towing vehicle with the yellow warning light and
in the diagnostic software.
!Defective fuses must be replaced.

16
4CAN Router
CAN Repeater Workshop instructions
On the housing cover label, the connection designations, fuse allocations and bolt
tightening torques are shown in case fuses have to be replaced.
Fig. Label on the housing cover of the CAN router
ADevice designation
BTightening torque for the bolts on the housing cover
CConnection designation
DFuse allocation
Changing a fuse – Use the diagnostic software to determine the position of the defective fuse. The
position can be located in the diagnostic memory.
– Mark the cover and the housing of the ECU if necessary, so that the alignment is
not wrong when the cover is replaced later.
– Unscrew the housing of the ECU.
– Carefully remove the defective fuse and replace with a new fuse. The "little fuse"
fuses can be purchased at most retail outlets.
– Close the housing with the housing cover and make sure that it is aligned properly
with your markings.
– Tighten the bolts alternating across from one another. The maximum tightening
torque is shown in position B on the housing cover.
BB
CD

17
5
CAN Router
CAN Repeater
Diagnostics
5 Diagnostics
The diagnostic software for the CAN router/repeater enables fault analysis and
status monitoring for the devices.
For the diagnosis, you require
• a PC or laptop,
• a diagnostic interface
• a connection cable to the vehicle
• The diagnostic Software "Trailer CAN Router-Repeater"
5.1 Diagnostic port
5.1.1 ISO7638 towing vehicle/trailer interface
The connection of the diagnostic software to the CAN router/repeater can be made
via the towing vehicle-/trailer interface with an ISO 7638 connection adapter.
!On vehicle combinations with multiple CAN routers in sequence, the CAN router
that is connected directly with the ISO 7638 interface is always diagnosed.
5.2 Hardware
PC / Laptop
WABCO offers you a workshop-suitable, impact- and contamination-resistant laptop.
This "Toughbook" with preinstalled Diagnostic Software can be obtained from
WABCO.
The Diagnostic Software will run on all standard PCs with an operating system
Microsoft Windows 2000 or higher.
There are no other special requirements of the hardware. The PC should however
have a free USB connector or a free serial connector (COM interface 9-pin) to
connect the diagnostic interface.
Diagnostic Interface Diagnostic cable Connection adapter
446 301 021 0 (serial) CAN-Converter
446 300 470 0 446 300 360 0
446 301 022 / 030 0
(USB)
446 300 361 0 or
446 301 362 0 446 300 360 0

18
5CAN Router
CAN Repeater Diagnostics
Diagnostic Interface Set
To set up the diagnosis, the WABCO Diagnostic Interface Set with order number 446
301 030 0 (USB connection) is required. The set contains the Diagnostic Interface
and a USB connecting cable to the PC or laptop.
The old Diagnostic Interfaces with serial connection (446 301 021 0) and with USB
connection (446 301 022 0) can still be used.
5.3 Diagnostic Software
There are three ways to obtain the "Trailer CAN Router-Repeater" diagnostic
software:
• Offline as a USB stick version
• Online as a single download
• As a part of a WABCO system diagnostics subscription
For the diagnosis of multiple WABCO systems, WABCO offers you four different
Diagnostic Software subscriptions via the Internet. These contain numerous
diagnostic programs at one very low price.
On the Internet, on Web page www.wabco-auto.com in the quick access area, click
on "Diagnosis" and then on "WABCO System Diagnostics". There, you will find
further information and can order the Diagnostic Software in your language and to
load onto your PC.
5.3.1 Diagnostic Software "Trailer CAN Router-Repeater"
If a diagnostics connection exists, the diagnostic software recognises, when starting,
which system – whether CAN Router or -Repeater – is connected and adapts the
display of the diagnostic software accordingly.
The following important tasks are covered by the diagnosis:
Diagnostic memory Under menu point "Messages/Diagnostic memory“, current and aged system errors
and notes are shown (see chapter 6.1 „Diagnostic messages“, page 20).
The diagnostic memory can be deleted with the respective button.
Status monitoring • Monitoring the CAN communication between the CAN router/repeater and the T-
EBS modulator
If a fault is reported in the CAN communication, the cable connection must be
checked.
If multiple CAN routers are connected in series, each device must be checked
individually. Always choose the interface directly before the CAN router for checking
the communication status to the downstream T-EBS modulator or attached router.
• Monitoring the status of the warning lights

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5
CAN Router
CAN Repeater
Diagnostics
Faults in CAN communication and warning light messages are shown as follows:
Fig. Screenshot Diagnostic Software: Faulty CAN communication to Trailer #2
Monitoring the external
nominal pressure
sensor
In menu "System / Deactivate fault monitoring of pressure sensor", the fault
monitoring for the external nominal pressure sensor can be deactivated.
When delivered, the fault monitoring of the external nominal pressure sensor is
deactivated on the CAN router/repeater. The fault monitoring is activated when the
sensor is connected for the first time.
If it is connected again after replacing the sensor, the monitoring is activated again
automatically. In this case, the fault monitoring must be deactivated again.
!As of version 1.5 of the Trailer EBS E (production date from CW 49/2009), in the
diagnostic software "Trailer EBS E" with connected external pressure sensor on
the CAN router/-repeater, select setting: "Nominal pressure sensor on R/R" to
improve the communication between the devices.
ECU Software Update In the "System / ECU Update" menu, the software for the CAN router/repeater can
be updated. Updates for the ECU software are provided in file format and can be
loaded into the ECU with the diagnostic software.
– Pay attention to the messages and follow the instructions of the diagnostic
software during the ECU software update.
!Only software that has been officially released by WABCO is to be loaded into the
ECU of the CAN router/repeater.

20
6CAN Router
CAN Repeater Appendix
6 Appendix
6.1 Diagnostic messages
Fig. Screenshot Diagnostic Software: "Diagnostics memory"
Component
Type of fault
Component
Type of fault
Note
Code Message
78 External desired-pressure sensor
220 CAN data link connection Power_IN
183 CAN data link connection Power_OUT1
184 CAN data link connection Power_OUT2
251 Power supply connection Power_IN
181 Power supply connection Power_OUT1
182 Power supply connection Power_OUT2
253 Parameter setting
254 Control unit
255 Internal operating software
Code Message
0 Value too high
1 Value too low
2 Data is irregular or incorrect
3 Overvoltage/Short circuit to 24 V
4 Undervoltage/ Short circuit to ground
5 Permanent current consumption
6 Current too high or circuit grounded
7 Air gap too big
8Slip
9 Signal failure
10 Jump up / Jump down
11 see note
12 see note
13 Characteristic curve information
14 Special message/ see message info
15 see note