CD 38
Information
newsletter
about Citroën's
Diagnostics
Tool
M A G
EDITORIAL
May 2007
IMPORTANT
This newsletter must be
given to Citroën senior
technicians, senior
mechanics and technicians.
Happy reading and diagnostics!
The After-Sales
Technical Management Team
C O N T E N T S
Spring is here and the After-Sales Technical
Department takes you off the beaten track with
the launch of Citroën's first ever 4x4, C-Crosser.
You will also discover all the new features and
functions of the diagnostics CD-ROM 38, which
includes
C4 SEDAN with the Flex Fuel technology used in
Brazil and the new
RT4 telematics unit.
You can also discover the latest changes to the
diagnostics trees and the procedures used to find
permanent consumers.
Finally, this issue includes the functionality of the
reference curves.
NEW FEATURES
P.2
C-Crosser
Citroën C4 Sedan
Flex Fuel
Tablet PC
ZOOMING
P.4
Changes to the diagnostics
trees
Reference curves
Diagnostics assistance procedure
The new RT4 unit
DIAG CRI reminder
P.5
P.6
P.7
TIPS & TRICKS
P.7
INSTALLATION
P.8
LEXIA mag - MAY 2007
Issue CD-ROM 38, P/N 0072D5 - GB
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Vehicle news
The diagnostics of the
C-CROSSER
2
The C-CROSSER in brief
The diesel version of C-Crosser will arrive in
the network in July 2007. It is the very first
4x4 Citroën. The model has been developed
in partnership with Mitsubishi and is based
on the Outlander.
Some special features
of C-CROSSER
• A new engine
C-Crosser is fitted with the new 157 hp
DW12M 2.2-litre HDi, which is an evolution
of the DW12B. The DW12M powerplant
features a single variable-geometry turbo
controlled by an electric actuator with
position repeat.
The DW12M is the first engine to be fitted
with a solenoid used to by-pass the EGR
exchanger, which is why the new parameter
"Position set point for EGR cooler by-pass"
has been introduced .
Note: since the air conditioning pressure
sensor is not connected to the injector ECU,
the measurement of this parameter is produced by information from the air conditioning
ECU.
Tip: if the vehicle runs out of fuel, the
following sequence must be completed 3
times:
"switch on the ignition - wait 15
seconds - switch off the ignition", so that
the boost pump in the tank fills the lowpressure circuit. After these three sequences,
switch on the starter.
• Electronic architecture
The general architecture is based on three
networks that interconnect the numerous
ECUs. Two CANs and one LIN are present
on the vehicle.
• Remote ECUs
For the diagnostics tool, the door and sun
roof module ECUs present on the LIN
are special. All of the communication and
Lexia38_GB_STAR.indd 2
diagnostics functions are centralised in the
ETACS.
This is the reason why any requests relating
to these ECUs that are made in the menus of
the diagnostics tool cause the tool to interrogate the ETACS using specific routines.
> The master ECU: ETACS
ETACS is the equivalent of the BSI ECU. It
centralises certain functions and acts as the
gateway between the vehicle's diagnostics
connector and the other networks.
Note that the ETACS does not contain a
fault log (JDD).
• Downloading
and remote coding
The following ECUs are available for the
download and/or remote coding functions:
ECU
ETACS (BSI)
Diesel CMM
Petrol CMM
CVT
Down
loadable
Remote
codable
×
×
×
×
×
×
Note that when remote coding, the other
ECUs are self-programmed by the ETACS.
The ETACS updates the other ECUs on
the network using the information that it
contains.
• The steering wheel angle sensor
On C-Crosser, the steering angle sensor is
an ECU in its own right. It has its own selfdiagnostics function.
It can be found in the "Active, passive safety"
menu in the diagnostics tool.
It is calibrated in this ECU rather than in the
ESP, which is the case in other vehicles.
• A unique ECU:
the rear axle electronic clutch
C-Crosser is usually driven by the two front
wheels. However, a selector switch on the
central console can be used to change the
drive mode when stationary or when on the
move. There are three modes:
- 2WD: front-wheel drive,
- 4WD: four-wheel drive,
- Lock: four-wheel drive with special control
laws for the rear drivetrain.
The electronic clutch of the rear axle is
controlled by an ECU that transfers torque
to the rear axle in 4WD or Lock mode,
when the front wheels loses grip. A loss of
grip is detected by the wheel sensors
of the ABS system.
The AWD sensor receives the data sent by
the CAN and modulates a current between
0 A and 3 A according to the engine torque
to be applied to the rear wheels.
For diagnostics purposes, this ECU is located
under the dashboard, next to the clutch
pedal.
Diagnostics can be used to view faults,
settings measurements and actuator tests.
An actuator test is used to override the
transmission of torque to the rear wheels
in order to check the condition of the
electronic clutch.
• Xenon headlights
Xenon headlights are available as an option.
The headlight settings are controlled by a
specific ECU.
This ECU cannot be accessed in the general
test. It can be found in one of the Handset
menus on the "headlight level correction"
tab.
Only "Read fault" is available.
The settings are applied mechanically.
The faults are not read directly in the
diagnostics tool in the shape of fault codes
that are displayed on the screen, which is
the case for most PSA ECUs, but in the shape
of pictograms displayed on the vehicle's
handset (see photo).
Start a diagnostics session for this ECU using
the tool, follow the instructions to identify
the fault code on the handset, note the code
and check that it matches the associated
fault.
General comment:
The notion of momentary and
permanent faults and the associated
contexts remain identical to those used
in the Brand's other vehicles.
11/04/07 15:35:04
Vehicle news
Headlight pictogram
Available engines
Powertrain
Petrol
Diesel
Hdi PF
2.4-l - 170 hp
2.2-l - 157 hp
6-speed
manual
5-speed
manual
×
CVT
×
×
Location of diagnosis socket
Socket positioned at the base of the
steering column
N°
CAN-C
N°
CAN-B
N°
LIN
7800
Dynamic stability control
8208
6830
Sunroof
7020
ABS / traction control
8410
Coded immobiliser electronic
unit
Car radio or radio telephone
(car radio part)
9030
Driver door control plate
6750
4x4 transmission ECU
6570
Driver and passenger airbags
9050
Passenger door control plate
1320
Injection/ignition
8492
Hands-free kit
9032
Rear left door control
1630
7701
Gearbox
Steering wheel angle sensor
8080
0004
Air conditioning
Handset
9033
Rear right door control
8500
Navigation aids
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11/04/07 15:35:10
Vehicle news
CITROËN C4 SEDAN FLEX FUEL
A Flex Fuel version of C4 SEDAN fitted with
the 1.6-litre petrol powerplant (TU5JP4) is
available in Brazil.
The ME7.4.9 BOSCH engine control ECU is
used for this type of injection.
Flex Fuel engines can work with variable
proportions of gasoline / ethanol mixes.
The proportion of alcohol can vary from 22%
(E22) to 100% (E100) for this vehicle.
The Flex Fuel version features some specific
components:
- an additional fuel tank located under the
front bonnet and fitted with a pump and a
solenoid.
using the additional gasoline tank and then
to switch to the main gasoline/ethanol tank,
once the engine is hot.
In the diagnostics tool, specific dynamic Flex
Fuel settings (for vehicles in Brazil) have
been added to the ‘’Settings measurements /
ME7.4.9 Flex Fuel" menu:
- Status of the cold start relay (active or
inactive, depending on the ECU settings).
- Percentage of alcohol present in the mix in
the main tank.
Note:
there are no special fault codes for
this vehicle.
USE:
the engine can run only gasoline
only in the main tank.
Additional
gasoline
tank
- Alcohol meter in litres that represents the
total volume of ethanol consumed by the
engine.
- A cold start relay that is controlled by the
engine control ECU and is used to start
NEWS A B O U T T O O LS
TABLET PC
At the start of 2007 and with the release of
CD-ROM N°38, ACTIA introduced a latestgeneration Tablet PC into its LEXIA3 offer,
which benefits from the very latest develop-
ments in information technology, including
increased storage space and 1 GB of RAM for
improved performance.
This new platform is fully compatible and
integrated in the existing working environment in the Brand's workshops. The new
platform offers the same software functionality.
ACTIA guarantees the software compatibility of the first versions of the tablet PC that
have already been deployed on LEXIA 3.
Changes in characteristics and performance of the Lexia 3 tablet PCs
Before end 2006
2007
Operating system
Fujitsu ST 4120
Intel Pentium III 933 MHz-M
Microsoft© Windows© XP Tablet PC Edition 2002
Fujitsu ST 5020
Intel Pentium III 1.10 GHz-M
Microsoft© Windows© XP Tablet PC Edition 2002
MOTION LE 1600
Intel Pentium M LV 758 - 1.5 GHz
Microsoft© Windows© XP Tablet PC Edition 2002
Installed RAM
Max RAM capacity
Battery technology
256 MB
768 MB (by adding two 512 MB bars)
Lithium ion (6-cell: 10.8 V, 4,000 mAh)
256 MB
2 GB (by adding RAM bar)
Lithium ion (6-cell: 10.8 V, 4,000 mAh)
1 GB of memory (400 MHz DDR2)
1.5 GB
Lithium ion (4-cell: 14.8 V, 2,600 mAh)
Digitiser
Hard disk
BIOS
Electromagnetic (active)
30 GB (extendable to 60 GB) 2°5
Phœnix BIOS, 8 Mbit, flashable
Electromagnetic (active)
40 GB (extendable to 60/80 GB) 2°5
Phœnix first BIOS, 1 MB, flashable
Electromagnetic (active)
60 GB HD - 1.8 inch on shock absorbers
Phœnix BIOS, 1 MB, flashable
System bus speed
Graphics processor
133 MHz
Intel 830 MO
400 MHz
Intel 855 GMO
400 MHz
Chipset Intel 915 GMB
Audio
Sound board (STAC9767)
Sound board (BSTAC9753A)
Sound board (AC97)
Communication
Modem V.90, 56 K, 10/100 Base-T-Ethernet
Modem V.92, 56K, 10/100/1000 Base-T/TX-Ethernet
Built-in Ethernet LAN controller 10/100/1000 with
RJ-45 connector (Ethernet gigabyte)
Bluetooth, Infrared IrDA, WiFi (Intel 802,11 b/g or
Atheros a/b/g), Ethernet Gigabit
Processor
Wireless communications
Wireless LAN (802.11b)
Connecters
2 USB 1.1 ports; IEE 1394; RJ-11 modem; RJ-45 LAN;
IrDA 1.1; VGA; 1 type 1 or II; PCMCIA; headset port;
microphone port; keyboard/mouse port
Display
10.4*XGA TFT active matrix
Bluetooth TM system, Intel PRO Wireless 2200 BG
Network Connection option (WI-FI® communications
certified 802.11 b/g)
2 USB 1.1 ports; IEE 1394; RJ-11 modem; RJ-45lrDA 1.1;
VGA; 1 type 1 or II; PCMCIA; headset port; microphone
port; keyboard/mouse port; external screen port;
SD/MC connector
12.1*XGA TFT, 180° display
Battery technology
Lithium ion (6-cell: 10.8 V, 4,000 mAh)
Lithium ion (6-cell: 10.8 V, 4,000 mAh)
Battery life
4 hours (3h30 when measuring)
6 hours (3h30 when measuring)
Dimensions
Weight
30.1 cm x 22 cm x 22 cm
1.5 kg
32.4 cm x 22 cm x 4 cm
1.55 kg
Lexia38_GB_STAR.indd 4
I/O Ports and Extensions; VGA DVI (Digital Video
Interface) VGA; microphone input and headset output;
PCMCIA; digital fingerprint reader; USB 2.0 x 2
12.1* TFT XGA with wide angle of vision and variable
brightness sensor
Lithium ion (4-cell: 14.8 V, 2600 mAh)
standard battery with 3h30 lifetime (depending on
the application)
29.6 cm x 24 cm x 18.7 cm - 2.2 cm
1.4 kg
11/04/07 15:35:11
ZOOMing
Changes to the
diagnostics trees
The network has sent us a number
of comments on the structure of the
diagnostics trees. These comments will
soon be integrated and deployed in your
diagnostics tools.
This approach, which is different from the
preceding method, has been introduced on
CD-ROM N° 38 for all of the diagnostics
trees of the air conditioning function of
C4 Picasso.
The aim is to improve the quality and the
effectiveness of the diagnostics trees and to
make the diagnostics trees easier to use.
The diagnostics trees now start with a cell
indicating the possible origins of the fault and
the components that can cause the fault to
appear.
Example 1: photo of the connection BSI
differentiator.
Structure of the
symptom tree
Example 2: wiring diagram for the connection of several differentiators.
The guided method now converges towards
one or more components (see CD-ROM
N°37 magazine).
This is why the symptom trees include a list
of the components of the ECU incriminated
by the guided method.
According to this diagram, the differentiator
4267-T must be connected to the green
63-channel connector on the automatic
terminal unit and the differentiator 4231-T
to the white 63-channel connector on the
automatic terminal unit.
Advanced BSI
Simply validate the component(s) in the list
indicated by the guided method to access
the corresponding check tree.
The details of the checks are described in the
rest of the diagnostics tree.
Structure
of the fault tree
The structure of the trees is unified.
Before each check, the following are shown:
• the equipment need to complete the tree,
• an indication of the time taken to complete
the tree.
Wherever possible, the checks follow this
sequence:
• preliminary checks,
• diagnostics checks,
• mechanical checks,
• electric checks.
Note: the simplest checks are
grouped together at the start of the
tree.
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Installing
differentiators
When several differentiators are connected
to the automatic terminal unit of the diagnostics tool, the tool displays a wiring diagram to
make it easier to make the connections.
From June 2007, "advanced" BSIs will be
installed in C4 Picasso to replace the
"cross-range"
units.
Ultimately, all full CAN vehicles will be
fitted with these new BSIs.
Caution: the "advanced "BSIs" must not
be installed in place of "cross-range"
BSIs and vice versa. This change does
not impact diagnostics.
In order to make it easier to identify
the BSI installed in the vehicle, from
CD-ROM N°38 onwards the tool will
display an additional line entitled "BSI
type" in the "Identification" screen.
Path leading to the different diagnostics tree structures
Global test
or test by
function
DIAGSYS
F5
result
Global test
or test by
function
Read fault
ECU in red
Symptom
Fault
Tree
Tree
Component
check tree
11/04/07 15:35:14
Reference
curves
The Reference
Curves can be found in:
• All systems controlled by an ECU or a unit
(ECM, BSM, BVA, etc.) and connected to
sensors/actuators that can be replaced individually (solenoids, sensors, regulators, etc.).
Physical measurements at the
ECU terminals
• Excluding:
The diagnostics tool can be used to take
curve readings and measurements on vehicles
using the physical measurements PCB and
the 252-channel electronic terminal unit, irrespective of the mode used (Expert, Guided
or Manuel).
The tools include reference curves in order
to compare the measured signals with the
theoretical reference signals.
The purpose of the reference curves is to
optimise fault finding using the different
methods proposed by the tools, by:
> Signals that change too quickly or slowly
(temperature measurements over several
hours, signals oscillating at more than 500
kb/s),
• Identifying whether a signal is sent or
received by a sensor/actuator across certain
terminals of the ECU,
• Comparing the shape of this signal with the
"correct" or "expected" shape of the same
signal.
> The list of all the reference curves in the
selected ECU appears. The method is fully
guided:
> Signals that are too complex to interpret
and offer no added value (network frames),
> Signals that appear unexpectedly (test
conditions that are too unreliable to reproduce) and may be misinterpreted,
> AON (all-or-nothing) signals (a voltmeter is
sufficient),
> Systems with actuators/sensors that cannot
be individually identified (car radio, multifunction screens, etc.).
Procedures:
> Curves can only be accessed after reading
an ECU fault and using the "Physical measurements" icon (F2). The "Reference curves"
submenu is then available.
> The settings are predefined (time units,
voltage, offset, activation)
Note:
The test conditions must be observed as far as is possible in order to
attempt to obtain the same signal.
If all the test conditions are met
and the result achieved is not OK,
the fault finding procedure must
be continued.
> The measurements are predefined
> The test conditions are defined
> The interpretation of the results is specified
Reminder:
Reference curves are not intended
for use as strict measurements of,
for example, time or voltage, but
as an approximate indication. Since
the screens are quite small, do not
hesitate to view the more detailed
"Settings Measurements" function
and the "Oscilloscope", which has a
larger screen that is easier to read,
but must be calibrated manually.
Assistance procedures for diagnostics
Search for
permanent consumers
The diagnostics tools now features a new
diagnostics assistance procedure. This procedure covers battery discharges caused mainly
by a permanent consumer.
This procedure can be used on all multi-
Lexia38_GB_STAR.indd 6
plexed vehicles. The procedure is designed to
determine whether the failure to start is due
to a discharged battery, whether the battery
has been discharged by a permanent consumer, and to identify the consumer.
Press F6 in "Global test", then "Battery system". Then select the "Permanent consumer"
tree.
11/04/07 15:35:17
The new RT4
telematics unit
DeV screen
Diagnostics
Intersystem CAN
Like the preceding generation, the new RT4
telematic unit is a combined radio, telephone
and navigation system. The telematics unit
and its colour multi-function DeV screen are
used to display a range of vehicle information and malfunctions in the shape of alert
messages.
ABS
Parking
assist
CD autochanger
CD
audio link
autochanger
Screen
retraction
system
IRDA
Bodywork CAN
Handset
Window lift
Control
AM/FM1
FM2
Audio ST IN
Mic
Communications
Module
beneath
the Steering Wheel
or Steering wheel
with fixed centralised controls
(where appropriate)
Video 1 IN
Emergency speaker link
10 procedures in the shape of Info'Diags are
available to help you in diagnosing the new
RT4 telematic units.
GSM
SIM
CAN
Digital
Amplifier
Analogue
Amplifier
Diagnostics assistance
procedures
GPS
CD player
Comfort
CAN
BSI
This diagram shows the architecture
with details of the different ECUs and
subsystems that contribute to delivering the
functions of the RT4 telematics unit.
Telematic
Receiver
Control
Airbag
Like with the RT3 telematic unit, each procedure is dedicated to one or more vehicle
functions.
(see below)
RT4
ARCHITECTURE
Wire airbag link
ID N°
Functions
Vehicle
377
Presentation of the RT4 diagnostics assistance procedures
378
RT4 diagnostics assistance: on/off function
379
RT4 diagnostics assistance: display function
380
RT4 diagnostics assistance: sound function
381
RT4 diagnostics assistance: navigation function
382
RT4 diagnostics assistance:
Voice recognition/Voice synthesis function
383
RT4 diagnostics assistance: CD player / CD autochanger
384
RT4 diagnostics assistance: AM-FM / RDS-TMC function
385
RT4 diagnostics assistance: telephone / services function
386
RT4 diagnostics assistance: buttons / controls function
All vehicles
fitted with an RT4
TIPS & TRICKS
Installation of the update
> With Lexia3, you MUST close the LEXIA
application before starting the update.
> At the end of the installation, remove the
update CD/DVD from the drive to prevent
the installation procedure from starting again.
LEXIA MAG- CD 38
Lexia38_GB_STAR.indd 7
Recommendations for use of the
tablet:
Entering information on the
Lexia tool :
> For optimal performance of your Lexia3
application, do not install any Windows XP
upgrades (including Service Pack2) or install
any other software.
> Entering information contained in the
"General settings / User configuration" and
"General settings / Tool configuration" menus:
the tool MUST have a serial number (Tool
configuration) and an RAC account number
(User configuration). Entering this information
helps us to keep track of systems and users.
11/04/07 15:35:17
I n s ta l l i n g L e x i a u p d at e s
LEXI A 2
Proceed as follows
for a complete
software update:
> Disconnect the ICC from the tool.
> Switch on the Lexia 2 and wait until it is ready.
> Check that the CD-ROM drive is on.
> The ICC must not be reconnected during the update.
> Prepare the Lexia 2 update CD-ROM.
> Insert the CD-ROM in the drive.
> Click on the CD-ROM update icon.
> Choose your language and confirm.
> The update lasts about 45 minutes. When the update is finished, confirm by clicking on
then switch off the Lexia 2.
> Reconnect the ICC to the tool.
> Switch on the Lexia 2.
> Lexia 2 has now been installed. Check the version.
LEXI A 3
,
Proceed as follows for a complete software update:
> Switch on the hand-held PC and wait until Windows is fully loaded.
> Check that the tablet PC and the DVD drive are on.
> Prepare the Lexia 3 update CD-ROM and/or DVD-ROM.
> Insert the CD-ROM in the drive.
> Choose your language and confirm.
> Tick the Installation/Update option.
> The update starts and lasts about 20 to 25 minutes.
> Lexia 3 has now been installed. Check the version.
Comment
LEXIA MAG- CD 38
Check that the ICC is connected to the hand-held PC when the Lexia 3
application is started so that the ICC can be updated.
Automobiles Citroën
RCS PARIS 642 050 199
The intellectual property rights applying to the information contained in this document are the exclusive property of the Manufacturer.
The reproduction and/or distribution of all or part of this information is prohibited without the prior written permission of the Manufacturer.
The technical information contained in this document is for use by professional automobile repairers only.
In certain cases, this information may relate to vehicle safety. It is to be used by the automobile repairers for whom it is intended.The technical information in this document is subject to change in accordance with the changes made to the characteristics of the models in each range.
The automobile repairers are invited to refer to the Manufacturer on a regular basis in order to obtain all necessary updates.
Creation & Photo DTAV/PIMS/EDAV - DCCO
Texts: DTAV/MCDE - Printed by EDIPRO- Printed in the EU
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