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ELECTRICAL ASSISANCE EQUIPEMENT
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Diagnostic – Damage location algorithm
RECOMMENDATIONSNothing to notice
Check the tester operation on another vehicle
Check: - Connection between CLIP tester and the diagnostic socket (cable i n good condition).
- Cockpit and engine compartment fuses.
Check presence +12 volts before c ontact at pin 16 , + 12 volts after contact at pin 1
and mass at pins 4 and 5 of the di agnostic socket
Fix if necessary
Check the computer connection.
Connect the m ulti-socket and c heck the insulation, continuity and absence of parasite
resistance at connections: UCH connector P1 pin A1 mass
UCH connector P1 pin A3 fuse box + 12 volts before contact
UCH connector EH1 pin B34 pin 7 diagnostic socket (line K)
Fix if necessary.
.
ALP 1There is no communication with the computer
Check the system operation
AFTER REPAIRING
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REMARK : By means of the CL IP
tester it is possible the visualization of
the releasing of the driver’s ai rbag.
If the airbag has been tripped: -replace the releasing elements and the
defective ones;
-check the failures absence by means
of the CLIP tester;
- check the necessity of UCE airbag
replacement.
When everyt hing is correct, unblock the
UC E air bag and the system is again
operational (the airbag indicator is getting off).
If t he CL IP t est er i s sti pul ati ng the
replacement of UCE airbag, that means:
- UCE airbag has released 4 times the airbag.
-An internal failure of UCE airbag.
UCE AIRBAG CONNECTOR
Pin Denomination 1Free
2Free
3Free
4Free
5+ after contact
6 Mass
7 Airbag indicator
8Free
9 “K” diagnostic line
10 + driver airbag signal
11 – driver airbag signal
12 Free
13 Free
14 Free
15 Free
16 ,17 Shunt
18 ,19 Shunt
20 Mass
21 ,22 Shunt
23 “L” diagnostic line
24 Free
25 ,26 Shunt
27 Free
28 ,29 Shunt
30 Free
REMARK:
U CE airbag conn ector has as
par t i c ul ari t y the short c i rc ui t se t ting of
diffe rent releasing lines when this one is
disconnected. The shunts placed in front of
each releasin g line are avoiding the
undesirable releasing of these systems (by
antenna effect, for instance).
Airbag – Electronic control unit
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Diagnostic – Failure interpretation
DF003 DRIVER’S AIRBAG CIRCUIT
PRESENT CC : shortcircuit CO : open circuit
CC.1 : shortcircuit at + 12 volts
CC.0 : shortcircuit at mass
RECOMMENDATIONSCharacteristics: the measurement of the airbag releasing line is to be
performed only by means of the CLIP tester.
Use 30 pins adapter B40 for the intervention at the l evel of the
computer connector
CO - CC
RECOMMENDATIONSNothing to notice
Set t he contact on, then block the computer by means of the CLIP t ester (see “Blocking UCE
airbag”)
Set the contact off and dismount the two attachment screws of the airbag on the steering wheel.
Check the correct connection of the airbag.
Disconnect the airbag then connect the inert igniter instead of it.
S et the contact on and perform a checking by means of the CLIP tester.
Replace the airbag if the state “present failure” is becoming “memorized failure”
Turn the contact off ; conect then reconect the connector of the rotating contact of under steering
wheel control.
Only CLIP tester is to be used for measuring the resistance in point C2 of the airbag circuit.
If the resulted value is not correct, replace t he control under steering wheel.
Reconnect the rotating contact of the control under steering wheel, disconnect the computer
connector and connect in its place the 30 pins adapter B40.
Only CLIP tester is to be used for measuring the resistance of the driver’s airbag releasing line,
using cable A of the 30 pins adapter.
If the resulted value is not correct, check the correct connection of the 30 pins adapter (pins 10
and 11) and replace the front wiring if necessary.
If after performing these checking no failure has been noticed, check the presence of the 5 pegs
for shunt unblocking, at the 30 pins connector of UCE airbag. Check the condition of the 30
ways connector of the airbag wiring (the connector blocking system…).
AFT ER Connect UCE airbag and driver’s airbag then set the contact on.
INT ERVENT ION Erase by means of the CLIP tester the failures memorized by UCE
airbag, then turn the
contact off.
Pe rform again a checking by means of the CLIP tester ; in case of
failure absence, unblock the computer.
Destroy the airbag pillow, if you are replacing it (see “Destroying
procedure”)
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Diagnostic – Failure interpretation
DF003
PRESENT
CONTINUATION
CC.1 – CC.0
RECOMMENDATIONS Nothing to notice
Block the computer by means of the CLIP t ester (see “Blocking UCE a irbag”)
Set the contact off and dismount the two attachment screws of the airbag on the steering wheel.
Check the condition of the airbag releasing lines.
Only CLIP tester is to be used for measuring the isolation in point C2 of the airbag circuit (using
cable A of the 30 pins adapter).
If value resulted is not correct, replace the control under steering wheel.
Reconnect the rotating contact of the control under steering wheel, disconnect the computer
connector and connect in its place the 30 pins adapter B40.
Only CLIP tester is to be used for measuring the resistance of the driver’s airbag releasing line,
using cable A of the 30 pins adapter.
If value resulted is not correct, check the 30 pins connector (pins 10 and 11) and replace the
front wiring if necessary. AFT ER Connect UCE airbag and driver’s airbag then set the contact on.
INT ERVENT ION Erase by means of the CLIP tester the failures memorized by UCE
airbag, then turn the contact off.
Perform again a checking by means of the CLIP tester; in case of failure
absence, unblock the computer.
Destroy the airbag pillow, if you are replacing it (see “Destroying
procedure”)
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absence, unblock the computer.
D F016 COMPUTER CONFIGURATION
PRESENT
RECOMMENDATIONSCharacteristics: nothing to notice.
Diagnostic – Failure interpretation
The presence of this failure is correspo nding to an incoherence between the computer configuration
and the vehicle equipping, detected by the CLIP tester.
Modify the UCE airbag configuration by means of the CLIP tester, using the control “System
elements configuration”. AFT ER Erase the failures memorized by UCE airbag then turn the contact off.
INT ERVENT ION Perform again a checking by means of the CLIP tester; and in case of
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failure absence, unblock the computer.
DF034 BLOCKED COMPUTER
PRESENT 1. DEF : blocked further to a shock
2. DEF : blocked by m eans of CL IP t ester.
RECOMMENDATIONS Characteristics : nothing to notice
This failure is allowing visualization of the blocking state of the airbag computer.
When present, all releasing lines are inhibited, driver’s airbag releasing being not possible.
1. DEFRECOMMENDATIONS Nothing to notice
This failure is present after airbag releasing.
It is obligatory UCE airbag replacement and of the airbag pillow after shock producing
2. DEF RECOMMENDATIONS Nothing to notice
This failure is present in the following situation s:
- UCE airbag is new ( t his one is delivered blocked)
-I n case of an intervention on the vehicle, the computer blocking control is used, by
means of CLIP tester.
Unblocking : Perform again a checking by means of CLIP tester ; in case of failure absence,
unblock the computer.
Erase the memorized failure then turn t he contact off. AFTER Erase the failures memorized by UCE airbag, then turn the contact off.
IN TERVENTION Perform again a checking by means of the CLIP tester; in case of
failure absence, unblock the computer.
Diagnostic – Failure interpretation
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Diagnostic – Help
UCE A IRB AG REPL ACEMENT
New airbag computer are delivered in blocked condition in order to avoid all risks of
undesirable releasing (all releasing lines are inhibited).
This “blocked” mode is noticed by the airbag indicator lighting from the instrument panel
when setting the contact on. In order to replace t he UCE airbag, proceed as follows:
- set the c ontact off,
- dismount the central console tunnel,
- disconnect the UCE airbag connector,
- dismount the UCE airbag attachment screws,
- mount the new UCE airbag, the arrow from UCE a irbag being oriented towards front
of the vehicle, - reconnect UCE airbag connector,
- check t he system by means of the CLIP tester,
- modify if necessary the airbag computer configuration using the control “Configuration”,
- unblock the computer only in case of a failure absence, declared by the CLIP t ester.
DESIGNATION OF THE 30 WAYS UCE AIRBAG PLUGS
1. Free
2. Free
3. Free
4. Free
5. Supply + after contact
6. M a ss
7. Airbag failure indicator
8. Free
9. K diagnostic line
10. Driver’s frontal airbag (+) 11 .D river’s frontal airbag (-).
12. Free
13. Free
14. Free
15. Free 16. Free
17. Free
18. Free
19. Free
20. M a ss
21. Free
22. Free
23. L diagnostic line.
24. Free
25. Free
26. Free
27. Free
28. Free
29. Free
30. Not in use
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ELECTRIC DIAGRAMS
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Fuse box from engine compartment
The fuse box placed in the engine compartment is attached in front of the left shock absorber
column and contains relays and fusible protecting the following electric circuits:
FUS E
NUMBER
F01
F04
FUS E
TYPE
25A
30A
P ROTECTED CIRCU IT
Engine cooling fan
In jectors, oxyg en sensor heating resistance, canister purging valve,
injection computer, fuel pump, ignition coil., vehicle s peed
transducer.
R ELA Y
R ELA Y T YPE
CONTROLLED CI RC UI TD
30A
Injector s, canister
purging valve , oxygen
s ensor heating resistance,
injecti on computer, and
vehicle speed transducer
H
30A
Fuel pump,
i gnition coil
B
30A
Engine cooling fan
E*
30A
F og projectors
∗- fo r vehicles equipped with fog projectors A. Vehicles
without AC equipment
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