INFO’ DIAG LEXIA
PROXIA
DIAGNOSTIC TOOLS
CITROËN All CDs
CITROËN SELLING DEALERS :
- PDI technicians
AFTER SALES
DIVISION - Campaign co-ordinators
N° 365
TECHNICAL AUTHORISED REPAIRERS :
SERVICES - Service Managers 03/09/2007
- Consultant technicians
THE CONTENTS OF THIS BULLETIN SHOULD BE MADE KNOWN TO ALL PERSONNEL
WHO, DIRECTLY OR INDIRECTLY, USE LEXIA / PROXIA DIAGNOSTIC TOOLS.
This INFO’DIAG cancels and replaces INFO’DIAG n° 327 of 12/12/2006
TITLE :
Aid to diagnosis of a Motorised Butterfly control unit, petrol injection Valeo and Sagem.
CONCERNING :
CITROËN vehicles with petrol injection engine ECUs : Valeo and Sagem (J34P and
S2000 PM1 PM2) on engines TU1A, TU3A, TU3JP and EW7J4.
INCIDENT :
It has been observed that the Motorised Butterfly control unit is often replaced for no
justifiable reason.
REMEDY :
Before taking the decison to replace a Motorised Butterfly control unit, please
systematically apply the following procedure.
Necessary tooling :
• Lexia/Proxia diagnostic tool
• The adaptor harness for the injection ECU.
REMINDERS :
Page 1 / 8
• In disconnecting the Motorised Butterfly control unit, it is absolutely prohibited to
apply an anti-grip spray as this would pollute the wiring.
• It is absolutely prohibited to insert tools into the contacts.
Page 2 / 8
Stage 1
Perform a reading of faults using the diagnostic Stage 2
tool. Is there a fault in relation to the Motorised End of
Butterfly control unit ? procedure
List of the faults concerned : Replacement
P0121-P0123, P1152, P1153, P1157, P1158, of the
P1161, P1280, P1632, P2101, P2176. Motorised
No
Butterfly control
unit prohibited.
Yes
Stage 3
Is the battery voltage fault present ?
Yes
No
Stage 4
End of procedure
Deal first with this fault.
Stage 5
Go to stage 11
Is the ECU a J34P ?
No
Yes
Stage 6
Do not disconnect anything.
Via the diagnostic tool, perform an
Go to stage
actuator test on the M.B. control unit.
11
Check that the M.B. control unit moves
(slight clicking). No
Is the result of the test correct ?
Yes
Go to stage 7
Page 3 / 8
Stage 7
Via the diagnostic tool, perform the
actuator test again on the M.B. control unit.
During the test, shake the harness
m oderately (2 to 3 up-and-downs per No
second), holding the harness less than 10
cm away from the connector of the
Motorised Butterfly control unit, without
pulling on the wiring.
Check that the M.B. control unit moves
(slight clicking). Stage 8
Yes
Did the actuator test go correctly ? End of procedure
Repair the harness or
the connector. For
greater precision,
Yes perform a reading of
faults in order to identify
the m alfunction.
Stage 9
Perform the actuator test a third time on the
Motorised Butterfly control unit. During the
test, shake the harness m oderately (2 to 3 No
up-and-downs per second), holding the
harness less than 10 cm away from the ECU
connector, without pulling on the wiring.
Check that the M.B. control unit moves
(slight clicking).
Did the actuator test go correctly ? Stage 10
End of procedure
Repair the harness or
the connector. For
Yes greater precision,
perform a reading of
faults in order to identify
the m alfunction.
Stage 11
Check the following points :
- The connector should be correctly locked
on the Motorised Butterfly control unit.
- The supply harness should be correctly
secured : as in the diagram s below.
Page 4 / 8
Engine TU1A (HFX) : Citroën C3 New Look / Citroën C2 full-CAN.
Engine TU3A (K6E/K6V) : Citroën C3 New Look / Citroën C2 full-CAN /
Citroën C3 Pluriel full-CAN.
Engine TU3JP (KFV) : Citroën C2 / Citroën C2 full-CAN /
Citroën C3 / Citroën C3 Pluriel.
Inlet air The electrical supply of the Oil vapours
Canister purge pressure electrovalve must pass in heating element
electrovalve sensor front of the canister pipe (02V_NR)
(02V_MR) (04V_GR)
Ignition coil Motorised
(04V_GR) Position the white mark on the harness at the centre butterfly control
of the ignition coil baffle plate unit
(06V_NR)
Page 5 / 8
Engine TU3A (KFW/K6F) – TU3JP (K6D/KFX/KFW) : Berlingo2.
Inlet air pressure Ignition coil Motorised butterfly Oil vapours
sensor (04V_GR) control unit heating element
(04V_GR) (06V_NR) (02V_NR)
Position the white mark on the harness at the
centre of the ignition coil baffle plate
Page 6 / 8
Engine EW7J4 (6FZ) : Xsara Picasso / Citroën C5 /
Citroën C5 New Look.
Engine harness
protection duct
Motorised butterfly
position sensor
Motorised butterfly fuel
Inlet air temperature heater sensor
sensor Inlet air pressure sensor
Page 7 / 8
Stage 11 (continued) No
Is the harness in conform ity ?
Yes Stage 12
End of procedure
Repair the harness.
Stage 13
Disconnect the Motorised Butterfly control
unit in order to check the following points :
- Absence of corrosion of the contacts.
- Absence of foreign bodies. No
- Absence of moisture or liquid in the
connector (water, coolant fluid, oil, grease,
etc.)
Is the connector in conform ity ? Stage 14
End of procedure
The connector of the
Motorised Butterfly control
unit is judged to be not in
Yes conform ity. Repair it.
Stage 15
Using the diagnostic tool, pursue the fault
tree(s) relating to the fault code(s) concerning
the Motorised Butterfly control unit. For this,
perform a reading of faults, select the fault
concerned and press on F5.
Only rem ove the Motorised Butterfly control unit
if that is what is required.
End of procedure
Page 8 / 8
