ABS CITROEN CX 1988 Service Manual

1
Achtung ! Wrchtiger Punkt oder Fehlerquelle
Pas p: ! Vrgtrgt punkt eller fejlmrtlrghetf
Atenci& ! Ptrnto rrnportante o posrble drfrcuitad
Cautron ! Important detarl or possible trap
Attenrione ! Punto rmportante o possrbrlrta tli errore
Let op ! Belangrijk punt, kan gemakkelrlk fout gaan !
Atenc% ! Ponto rmportante ou possrbilrdade de errar
Varning ! Vrktigt arbetsmoment eller mojlrghet till misstag
Attention ! Point important ou piege possible
Darauf achten. dass ketne Teile herunterfallen oder abspnngen
Rrsrko for at delene falder ud eller forskubber srg
Resqo de carda o de proyccc~& de j,reras
Parts may drop or spring OlJl
Rrschro d caduta o di proierione cl1 pezzr
Kans op rraar beneden vallen of Wegs[Jrlrqen van onderdelen
R~sco de queda ou de project% de pecas
Risk for att delar failer ned eller sprrtter ut
Rtsque de chute ou de projection de yreces
Unbedrngt Spezralschrauben verwenden
Specral - skruer skal anvendes
Emyleo tmperativo de tornillos especlales
Use of special fixing - hardware essenttal
Uso obblrgatono di bulloneria specrale
Urtlurtend specrale bouten gebruiken
UtrlizacG rrnperativa de parafusos ou yorcas especiars
Specralskruv mzste ovrllkorlrgen anvandas
Emplor tmperatrf de vtssene spectale
uttvoeren
Opera@6 a efectuar se necessdrio
Arbetsmoment/arbete att utfora
Operation to be carned out tf
Operatron a effectuer st necessarre

0 D Mehrere Einbaumoglichkeiten 1 -
( 2 - 3 ) 0 NL Verschillende voor mogelijkheden
0 OK 1 ; 2 ; 3...
Flere monteringsmuligheder (1: 2;
3... )
0 p Varias montage montagens ( pos&eis ) ( 1 2. 3 1
0 E Varios montajes posibles ( 1. 2. 3
)
0 0
Flera monteringsutforanden forekommer
GB Several assembly possibilities (1, 2, 3 ) ’ (1:2;3)
0 1 Diversi montaggi possibili ( 1 ; 2; 3 ) 0 F Plusieurs montages possibles ( 1 - 2 - 3 1
0 B Markieren, Biem Wiedereinbau auf Zugehorigkeit der Teile achten
0 BK Afmcerke. Ved genmontering skal delenes rette sammenpasning respekteres
0 E Senzlar. Respetar el apareado de las piezas para el nuevo montaje
0 GB Mark. The parts must be kept paired for reassembly
0 I Segnare. Rispettare l’accoppiamento dei pezzi per il rimontaggio
0 NL Merken. Zorg bij montage dat de onderdelen bij elkaar komen
a Marcar. Respeitar o acasalamento das pecas para arm&las
0 S Mark ut. Respektera a delarnas markning vid itermonteringen
0 F Reperer - Respecter I’appariement des pieces pour le remontage
0 B Einstellen 0 I Regolare 0 S Stall in
0 BK Justere 0 NL Afstellen
0 E Regular 0 P Afinar 0 F Regler
0 GB Adjust
0 D Abstand, Spiel
0 DK Spil
0 E Juego
0 GB Clearance
0 I Gioco
0 NL Speling
0 P Folga
0 S Spel
0 F Jeu
0 D Einbau durch Pressen, Vorspannen oder genaues Einpassen
0 DK Montering med forspaending, prespasning eller itrykning
@ Montaje con esfuerzo. precarga o apriete ajustado
0 GB Assembly force fit, with preload or interference fit
(3 Montaggio forrato, precarico o accoppiamento serrato
0 NL Montage onder spanning, voorspanning of klemspanning
0 P Armar em esforco, precarga ou encaixe apertado
0 S Montering med f&spanning. presspassning eller ihoptryckt
0 F Montage sous contrainte. precharge ou emmanchement serre

2 IVIA
422.1/l OVING AND REFITTING A REAR AXLE ARM
REMOVAL
Raise the rear of the vehicle and support it on stands,
wheels free.
Remove the road wheel.
Release the pressure in the hydraulic systems.
Remove protection plate (I 1, Fig. I.
Vehicle having the A.B.S. fitted, Fig. II :
Withdraw sensor (3) and push aside the metal panel
and sensor, liberating the electrical harness from the
retaining clips.
Remove suspension cylinder (5), Fig. Ill.
(As explained in @ MA 433. l/2/.
Take off fixing lug (41, Fig. Ill.
Uncouple:
- brake hose (21, Fig. I,
- the anti-roll bar, Fig. Ill. In order to do so, extract
screws (6) and (7) and keep adjustment shims and
washers c(a)) and ccbal.
Take off nut (8) 24 mm A/F, Fig. IV.
Free the shaft and remove the arm. REFITTING
Position the axle arm (the thinner thrust cup (9) :
9.34 mm thick at CCCH facing the interior of the
vehicle, -+ l/87), Fig. V).
l/87 -+ the thrust cups are identical and the adjust-
ment is effected by means of shims facing the exte-
rior of the vehicle.
Return the shaft to its original location.
Place nut (8), new NYSLTOP nul, Fig. IV.
Tighten to 13 mdaN.
Recouple the anti-roll bar, Fig. Ill. Add the screws (6)
and (7) together with the adjustment shims and
washers found at c(a)) and c(b)) on dismantling.
Tighten screws (7) to 6 mdaN and (6) to 10 mdaN.
Reconnect brake hose (2) Fig. I, fitted with a NEW
sleeve seal. Tighten it.
Refit fixing lug (41, Fig. Ill.
Locate suspension cylinder (51, Fig. IV.
(See @ MA 433. l/2/.
ABS vehicle, Fig. II :
Refit sensor (31, (grease the outside of the sensor with
MOBIL TEMP No. I).
Tighten the screw to 1 mdaN.
Reassemble:
- protection plate (I 1, Fig. I,
- the road wheel.
Lower the vehicle to the ground.

REMOVING AND REFITTING
AN UPPER WHEEL ARM
REMOVAL
Raise and support the front of the vehicle on stands
6602-T.
Depressurize the hydraulic circuit.
Set the height control lever to the (( low )) position
Remove, Fig. I :
- the wheel,
- the suspension cylinder pivot retaining pin (I 1,
- the anti-roll bar link rod nut (2).
Uncouple ball-joint (3) from the anti-roll bar link rod
using puller 6320-T. Fig. II.
Screw up the tool nut in the ball-joint stem. Fit the
tool cross piece and pin.
Extract, Fig. Ill,
- the nut from upper ball-joint (4).
Disconnect the upper ball-joint.
NOTE:
If the vehicle is fitted with the ABS, the removal of
the upper ball-joint nut requires pushing back the
transmission.
Remove:
- the pin, C
- the nut lock,
- the drive-shaft nut.
Fig. IV
- nut (51,
Fig. V
- the spindle with extractor 6303-T.
Remark: An adjustment shim may be found between
the arm and the front face of the subframe. REFITTING
The LH wheel arm is different from the RH one. Boss
u a )a should be directed towards the rear of the
vehicle when the wheel arm has been fitted.
Reinstall, Fig. V :
- the arm fitted with its thrust cups (7)
frhe thinner cup facing rearwardsl,
- the adjustment shim (6) found on dismantling, facing
forward.
Engage the spindle ; place a new NYLSTOP nut.
Tighten to 12.5 mdaN
Recouple the upper ball-joint.
Tighten the new NYLSTOP nut to 7 mdaN
Reconnect the anti-roll bar link rod (wipe the ball-joint
fixing but do nor use solventl.
Tighten the new NYLSTOP nut to 4.7 mdaN
Refit the suspension cylinder pivot and pin.
Vehicles equipped with the ABS:
Fit the drive-shaft nut (with the faces and threads
lubricated).
Tighten to 37.5 mdaN.
Replace:
- the nut lock,
- the pin,
- the road wheel

REMOVlNG AND REFlTTlNG A SWIVEL
REMOVAL
Support the front of the vehicle on stands.
Depressurize the hydraulic systems.
Remove:
- the road wheel,
- the pin,
- the nut lock,
- the nut (35 mm A/F)
Lock the wheel hub with tool. 6316-T, Fig. I.
Fig. II :
- nut (1) and its washer ; disengage the bail-joint from
the swivel,
- lock nut (6),
- nut (5).
Uncouple, Fig. II and Ill :
- cable (2) from the control lever,
- spring (31,
- cup (41,
- connection (7).
Take off, Fig. Ill, nut (8) together with its washer.
Liberate flexible pipe (9) from its fixing bracket,
Fig. Ill. ABS vehicles, Fig. IV
Extract the screw (I 0) securing the sensor.
Disconnect the brake pad wear warning lamp
harness.
Withdraw:
- the brake disc cooling plate,
- the harness screw and fixing bracket; release the
harness.
Remove the lower ball-joint nut.
Uncouple the swivel lower ball-joint using extractor
3312 T or 6323 T, Fig. V,
(avoid damage to the ball-joint protection rubber).
Pull out the drive-shaft.
Take off nut (I I) from the upper ball-joint, Fig. VI.
Uncouple the upper ball-joint.
Remove the swivel.

REMOVING AND REFITTING A SWIVEL
REFITTING Replace, Fig. IV:
Wipe the ball-joint fixings and location, do not use - flexible pipe (I I) into its fixing bracket,
solvent. - washer (I 0).
Recouple the upper ball-joint with the swivel. Tighten nut (9) to 2.2 mdaN.
Refit, Fig. I: Recouple:
- washer (I),
- Fig. IV, connection (I 2) provided with a new sea/.
- nut (2).
- Fig. V, the steering ball-joint.
Tighten to 7 mdaN (New NYLSTOP nut).
Refit:
Introduce the drive-shaft end into the wheel hub - washer (I 31,
(lubricate the hub seal lips). - nut (14) (New NYLSTOP one).
Couple up the lower ball-joint. Tighten to 6 mdaN.
Tighten to 6 mdaN the new NYLSTOP nut. Reconnect:
-cup (171,
Reconnect the brake pad wear warning lamp harness. - spring (I 61,
-cable (15).
Refit, Fig. II and Ill:
Adjust the handbrake (as indicated in @ 454.011).
- electrical harness fixing bracket (4).
- earth lead (5).
- screw (3). Put the drive-shaft nut into place.
- metal panel (6). (Faces and threads lubricated).
Lock the hub, utilizing tool 6310-T Fig. VI.
ABS vehicles, Fig. Ill:
Tighten to 37.5 mdaN.
Reinstall sensor (7) (spread MOB/L TEMP No. 1
grease over the outside of the sensor.
Bleed the front brakes (see @ 453.0/l/.
Tighten screw (8) to 1 mdaN.
Fit the wheel.
Lower the vehicle to the ground.
8531-8532

SPECIFICATION AND PARTICULAR FEATURES OF
THE SOURCE AND RESERVE OF PRESSURE
Reservoir:
The reservoir is located in the left hand rear section of the engine compartment. Its breather, situated on the filler
cap, is connected to a filter-capsule placed in the LH wheelarch.
Level indicator: Fig. I
A: maximum mark
B: minimum mark.
Key to reservoir diagram: Fig. I and II
1 - Overflow return from front and rear suspension cylinders.
2 - Overflow return from security valve and front rear height correctors
3 - Reservoir breather with filter in wheelarch.
4 - Hydraulic control block return pipe (ABS).
5 - Operational and overflow return pipes from compensator-brake control valve.
6 - Operational return pipe from pressure regulator and front and rear height correctors.
7 - Suction line for HP pump.
8 - Baffle deflector.
9 - Filter for overflow and operational return pipes.
10 - Fluid level indicator float.
11 - Filter on HP pump suction line.

Connectors
l.-~l
a,
- Connectors
,”
9 r, 75 Colour
FiY
E
vl
-
M
M
V
V
V
V
M
M
-
N
v
V
M
N
V
-
V
M
V
V
V
-
M
V
2
$
R
V
M
Mv
B
N
BI
B
Mv . -
z
Y
i
r”
B
G Function Function
:
m
.e-
1
-
1
2
3
-
1
2
3
4
1
2
3
4
I
2
3
4
-
1 .-
f
-
M
M
M
-
N
N
M
-
B
B
V
G
N
-
N
M
-
V
V
-
-
M 1
2
3
-
-
-
-
1
2 -
3 -
6 -
4 -
4 -
4 -
3
1
3
-
9
-
6
-
9
-
2
L.
B
-
J
-
v
-
V
-
B
m
sg
ZD
‘N
B
-
B
-
B
-
B
-
V
-
-
-
B Eng. Oil Pressure Sensor
94
95
96 Choke
Diesel Pre Heating
Front Bulb Failure 84
I 8
1
Eng. Oil Sensor
V
J
J Low Fuel Warning Lamp
Fuel Gauge
Fuel Transmitter Earth “Stop” Warning
Hydraulic Warning
Eng. Oil Low Pressure Warning
Water Low Level Warning
Water Temp. Warning
” + Ignition Switch
Battery Charge Warning
Eng. Oil Temp. Warning
Water Low Temp. Warning
2 74
80
79
77
73
80
89
70
100
102
101
98
99
97
85
90
211
212
214
103
103
9
10
11 Instrument Lighting
L/H Dir. Ind. Warning
Seat Belt Warning
+ Ignition Switch (After F2)
Earth 107
R/H Dir. Ind. Warning 105
106
85
211
108
65
66
65 BI
Mv
M
B
Mv
3
L/H Rear Door Warning
Boot Door Warning
R/H Rear Door Warning
L/H Front Door Warning
R/H Front Door Warning
Bonnet Door Warning + Ignition Switch (After F.2)
Earth
Diesel TDC
Tachometer
4
B
G Turbo Pres. Warning
Anti-knock Warning 64
63
Yelow Warning
Red Warning econoscope
5
Brake Pad Wear Warning
Hand Brake Warning
Rear Fog Lamp Warning
Side Lamp Warning
Dipped Beam Warning
Main Beam Warning
Clogged Filter Warning
0 ic 6
R Earth
Test
Warning Rear Bulb
Failure
Unit 81
82
83
7
12 ?ABS Warning
+ Ignition Switch ABS

2 MA LOCATION OF THE ELECTRONIC CONTROL
510.00/3
UNITS AND RELAYS (All Models)
POSITIONING OF THE ELECTRONIC CONTROL UNITS AND RELAYS
No. Description Location
54 ABS Control Unit G
57 Fuel Calculator Unit A
60 Air Conditioning Control Unit A
76 Window Winder Unit F
80 Speed Regulating Unit E 81
Heater Control Unit A
84 Water Level Unit L
87 Water Temperature Unit B
89 Door Locking Warning Unit A
90 Door Lock Control Unit A 91
Remote Control door Lock Unit C
92 Interior Lighting Timer A
93 Bulb Failure Indicator Unit (Salopn) H
93 Bulb Failure Indicator Unit (Safari) J 110
Heater Plug Control Unit
,. K 127
Side lamp Audible Warning D 141
Ignition ECU K 142
Injection ECU E 151
Water temperature Flasher unit B 658
Blower Speed Control Unit E 731
Fuel Injection electronic Relay M 733
Air Cond. Engine Fan Relay K 734
Injector relay M 735
Main Beam Relay D
739 Height Control relay B 743
Air Horn Compressor Relay K 745
Blower Motor Fast Speed Relay A 750
Fog Lamp Relay
6 756
ABS Electra-Valve Relay L 757
ABS Protection Relay L 772
Blower Fan Motor 2nd Speed Relay K 773
Engine Cooling Fan lnverter Relay K 775
Starter Motor Safety Relay (Auto G/Box) B 778
Fuel Heater/Starter Motor Relay (with diode) K
779 Fuel Heater Oil pressure Relay (with diode) K 781
Main fuel Heater Relay K RI
Engine Cooling Fan Relay B R2
Front Window Winder Relay 6 R3
Rear Window Winder Relay B R4
Heated Rear Screen Relay 6 I
Windscreen Wiper Timer Relay
B
C Direction Indicator Unit B