brake CITROEN CX 1988 User Guide

SPECIFICATION AND PARTICULAR FEATURES OF
THE SOURCE AND RESERVE OF PRESSURE
Security valve: Fig. I
Calibration pressures for slide valve return spring:
- Pressure for isolation (no supply to suspension at A and D) :
- Pressure for supply to suspension (delivery at A and D) : 110 bars min.
130 bars min.
Key to diagram:
A : Feed to front height corrector.
B : Feed to steering rack and control unit.
C : H.P. inlet
D : Feed to rear height corrector.
E : Leakage return.
(1) : Adjusting shims for the calibration of slide valve return spring.
Shim thickness
(2) : Slide valve.
(3) : Fault detector (mechanically operated through shifting of slide-valve (2) 1.
Brake accumulator: Fig. II
-Capacity: . . . . . . . .._.._..~..._~._............_..........._.....
- Calibration pressure: 0.9 mm
0.4 litres
2
62 f 32 bars
F : HP inlet.
G : Centrifugal regulator, security valve
H: Brake control valve.

REMOVING AND REFITTING
THE DRIVE SHAFT ASSEMBLIES
Support the front of the vehicle on stands 6602-T.
Release the pressure in the hydraulic system.
Set the height control to the “low” position.
Remove: Fig. I:
- the road wheel,
- the pin and nut lock,
- the nut (35 mm A/F). Retain the wheel hub using
tool 6310-T, Fig. I.
Fig. II,
- suspension cylinder swivel ball maintaining pin (I 1,
- anti-roll bar link-rod nut (2).
Uncouple spherical ball (3) from the anti-roll bar link-
rod by means of puller 6320-T, Fig. Ill: (Screw up
the tool nut to the ball-joint stem and fit the tool “U”
part and spindle).
Disconnect the brake pad wear warning lamp electri-
cal harness.
Take off the brake disc cooling plate securing screws. Extract the nut of the swivel lower ball pin.
Uncouple the swivel lower ball pin with extractor
3312-T or 6323-T (Avoid damaging the ball joint
protection rubber).
Removing the LH drive-shaft assembly:
Push the LH drive shaft (5) aside with a chisel (6),
bearing against the heads of the gearbox flange
screws, Fig. V.
Important : If a few hammer strokes are not enough
to push aside drive shaft (51, the circlip is probably
blocked inside the sun gear. In that case, undo
clamp (4) and remove the transmission without its
drive-shaft, (retrieve the rollerl.
Turn the steering through full lock to the left.
Leave the swivel hanging.
Liberate the LH transmission from the hub and remove
it.
Removing the RH drive-shaft assembly:
Slacken the drive-shaft bearing support nuts (71,
Fig. VI.
Swing through a half turn tie rods (81, so as to release
the bearing outer track.
Withdraw drive shaft (9) from the sun gear. (Remove
the shaft, the o’ring seal, bush, and dust seal).
Turn the steering to full right lock; leave the swivel
hanging.
Disengage the RH transmission from the wheel hub
and remove it.

REMOVING AND REFITTING THE
DRIVE SHAFT ASSEMBLIES
REFITTING
Lubricate the wheel hub seal lips.
Fitting the LH drive-shaft assembly:
install:
- a NEW circlip (21,
- O’ring seal (I).
on the shaft, Fig. I.
Turn the steering through full lock to the left.
Insert the shaft splines home in the sun gear.
Make sure that the circlip is fully entered into its
location within the sun gear by pulling the shaft.
Engage the drive-shaft into the wheel hub.
Fitting the RH drive-shaft assembly:
Turn the steering through full right lock.
Slide the shaft into bearing (3).
Install:
the dust cover (5)
- ring (41,
- o’ring seal (3).
on the drive shaft, Fig. II
Slightly grease the bearing outer ring (7) before ente-
ring it into bearing (8). Fig. Ill.
Introduce the drive-shaft into the hub.
Swivel tie rods (6) by a half turn so that they can grip
the bearing outer ring.
Tighten nuts (9) to 1 mdaN. Couple up the lower ball-joint, (Wipe the ball-joint
fixing but do not use solvent).
Tighten to 6 mdaN the (NEW NYLSTOP) nut.
Recouple link rod (IO) with the anti-roll bar. (Wipe
the ball-joint fixing, do not use solvent).
Tighten to 4.7 mdaN the NEW NYLSTOP type nut.
Refit the suspension cylinder swivel ball and pin (14).
Reconnect the electrical harness to the brake pad
wear warning lamp (I I).
Reinstall the brake disc cooling plate (I 3)
Fit the drive-shaft nut (with faces and threads
lubricatedl.
Clamp the wheel hub with tool 6310-T.
Tighten to: 37.5 mdaN.
Replace:
- nut lock (121,
- the pin,
- the road wheel
Lower the vehicle to the ground
3tc 8531

2 MA
510.00/1 ELECTRICAL JUNCTION BOX
Colour Colour
CJ)
”
2
a,
E --Pi- Function ”
i
-1
5 z 2 iz az?i”; cg Function
,%“~o” -0
2% z 2:
om 02’ 2%
Es p 2 f
“v)Z”” i53 s 22
S2r”~S 0% zi ‘i’ F
G,c
125M 1JM Earth 106-201 211
III 5 3 Bl 1 J Mv + lgnttron 40
On Harness 3 J 2 v L/H Front Srde Lamp 201
2 V Mv
G + lgnrtion Swatch 38
Main Beam 212 3V B Tachometer 66
4G V Dipped Beam
G 213
5 V BI L/H Drrectron lndrcator 107
III 6 6 B 1 J Mv + lgnrtron Swatch - Heater 20
l35B 1G 2J G + lgnrtron Switch - Heater 27
Drpped Beam 214
3
2J G Marn Beam 215
H 4
D 3 v R/H Side Lamp 202
4 J M 5J R
Earth Heater Eart; 24
11 I-203 216
5 V BI 6 J BI Heater Earth 31
R/H Direction lndrcator 112
I408 1 Heated Rear Screen IV 1 0 J 1 BI
162 Main Beam 215
2 2 Heated Rear Screen 2 J V
163 Dipped Beam 213
3 s Boot Lighting 3 G
188 Rear Fog Lamp Swatch
208
4 Side Lamps 4G N
217 + Directron Indicator Swatch 108
5 5
Rear No Plate Lamps 219
B 5 G BI L/H Drrection lndrcator I 109
R 6 2
Stop Lamps 6 G M Earth
147 I105
E 7G R Side Lamps
7 3 L/H DIrectron lndrcator 109 211
8 L? R/H Drrectron Indicator 8G B
110 R/H Directron lndrcator 110
9 t” Reversing Lamps 33 9 J N + Direct Lrghtrng 201
0 Rear Fog Lamps 208 0 BI N + Drrect Lrghting 201
IllOM 1 IV24M 1 + Battery lgnttron Switch 138
2J G Marn Beam 216 2 + Battery lgnrtron Swatch 27
3 3 + Battery lgnttion Switch 5
4 * 4 + Battery - lgnitron Swatch 38
56 R Side Lamps 211 .
B 6 IV31N 1 Heated Rear Screen
7M V Hand Brake 90 I.
8 N + Ignition Switch 79 IV46J 1 J R Windscreen Wiper Fast Speed 133
9V N + Direct 68 2 J Mv Wrndsc Wtper t lgnrt Swatch 138
0 V BI Tachometer 65 3 G Mv Windscreen Washer Pump
B 138
4 J BI Wrndscreen Wiper Slow Speed 134
II288 1 Side Lamp 204 5G v Windscreen Wiper Parkrng 136
2 B G Hazard Warning Switch 111 .6 G J Windscreen Wiper Timer 135
3B N + Drrect 110 .
B 4 B BI L/H Direction Indicator 111
IV 5 7 B 1 G Mv Windscreen Washer Pump 138
5 6 Mv + lgnitron Switch 111
2 G M Earth 6-80 138
6B J + Drrection Indicator Unit 107
3J G Earth
7 0 160
R/H Direction Indicator 112
G 4 M Cooling Fan Relay 6 a M Earth 113
5G B Horn 159
6 BI Cooling Fan 7
ll32B 1 V Cigar Lrghter Lighting 203 7V J
H 2 + lgnitron Cooling Fan Relay 6
II43M 1 J V13J 1
Earth 94
2 J 2 B V Horn
Earth 93
B 159
MB 3 B M
3 J Earth + Horn
92 159
II538 1 V J Rear View Mtrror De-lcrng V 2 4 BI 1 BI
158 Rear Window Motor
116
2v B Heated Rear Screen Switch 2J V
162 Height Corrector Earth 141
H H 3 V Mv + Ignition Switch 3J N + Drrect height Corrector 144
4J B + lgnrtron herght Corrector 139
(Heated Rear Screen) 162
lll12M 1 J Earth 204 189 V32N IN + Battery Junction Box 2
H J N + Crgar Lighter 90 G N + Battery Junctron Box 2
Ill 2 6 M 1 G N + Stop Lamp Switch 147 V45J 1 J R Wrndscreen Wrper Fast Speed 133
2 G M Earth 90 2 J BI Windscreen Wiper Slow Speed 134
3
D 3 G B Windscreen Wrper Parking 136
H 4V R + Glove Box Lrghting 187 4J N + lgnitron Windscreen Wiper 137
5 G Stop Lamp Switch 147 5 J Earth Windscreen Wiper 134
6 V Hand Brake Swatch 90
V54J IJ R Starter Solenord 5
III 3 2 N 1 V R + Direct Radro 191 2 G Bi Reversrng Lamps 33
H 2 ( + lgnrtion Swrtchl G 3 G + lgnrtron Swatch After Fl 34
4G R + lgnrtron Swatch Rev Switch 33
lll44B 1 lgnttron Swatch + C iF3) 138 -
2 lgnrtron Switch + C tF2) 27 V 6 3 R 1 BI N Rear Wrndow Motor 128
3 Starter Swatch 5
H 2G R t Direct After F7 179
4 lgnrtion Switch -t C lgnrtron 38 3J M + Dtrect Rear Crgar Lrgther 139

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

ARRANGEMENT OF THE ELECTRICAL INSTALLATION
q @ CX22TRS 7/85-t 1 MA 5 510.00110
3EF. DESCRIPTION LOCATION
Circuit Wiring CONNECTOR
Number HARNESS
Channel-colour (or urilt)
1 Front cigar ljghter & lighting 137-151
i5 38-l v H
5 Ignition distributor 30 to 34 3N 2
10 Alternator 51 to 54 b6 IN + Ilc CA & M
25 A & B Horn 107 - 108 c7 1N + 1N A
45 Battery 1
b8 IN + IN CP & CN
46 Instrument panel 36 to 73 159 to 162 g6 * T
50 Ignition coil 30-3 1 IN + Ilc G
75 Ignition module 30 to 32 7N Z
81 Interior heating control unit 21 to 24 h5 8N K
84 Coolant level indicator unit 41 to 43 e4 5B D
89 Door locking indicator lamp unit 131-132
i5 5N H
90 Door locking control unit 124 to 134 15 9v H
91 Remote control door locking unit “PLIP” 120 to 122 n5 8N P
92 Interior lamp timer 117 to 122 15 7M H
93 Bulb failure detection unit
27, 46 to 48, 74-75, 104-I 65 S8 38 + 68 & 6J L & w
95 Junction/Fuse box
127 Side lamp audible warning 1222123 g8
g6 5+N‘” ;
130 TDC sensor 28 3M
170 Boot light switch 136 s6 IM E
174 Boot door locking switch 126 t5 2M C
180 Reversing lamp switch 27 d6 1N + 1V G
185 Stop lamp switch 104 h6 IN + IM H
190 Hand brake switch 55 k5 2M H
!25 Carburettor choke switch 49 IG B
!29 Ignition switch 4-30, 44-95 h7 4M + 48 (95)
!30 L/H Front door switch *
119 f9 IM H
!31 R/H Front door switch 120 fl 1M H
!32 L/H rear door switch 122
k9 IM H
!33 R/H Rear door switch 123 kl IM H
!34 Glove box switch 135 f3 1 Ic+ 1 Ic H
!35 Hydraulic fluid low pressure switch 46 e6 IM G
!36 Hydraulic fluid level switch 45 e8 1 Ic + IM G
!37 Coolant low level switch 41-42 e3 3R D
!38 R/H Front door lock switch 64
jl 28 H
!39 L/H Front door lock switch 63 P
28 H
!41 R/H Rear door lock switch 66 (71 28 PD !42 L/H rear door lock switch 65 qg 28 PG
!43 Boot door lock switch 67 c5 2M C
!44 Bonnet lock switch 62 a5 2M V
!51 Height control switch 96 to 100
j5 2M & 4M H & (608) !54 Lighting/Direction indicator switch 72 to 75. 57 to 163 97 58 4M 3M T
!55 Windscreen wiper/Washer & Horn switch 90 to 95, 107 g6 48 5B 28 T
!68 Air recycling switch 15 to 17
h5 4J Q
!71 Air distribution switch 12 to 14 h5 4M Q !78 Blower motor speed control 18 to 20 h6 38 Q
!79 Heater control & Lighting 23 to 25-68 h4 58 K
100 Starter motor 2 to 4 b5 IN & IR CP 165 Ashtray lighting 152 if5 2B H
I70 Boot lighting 136 s4 1N & llc F
I75 Glove box lighting 135 f4 IN & 1M H I80 Engine compartment lighting 150 c6 IN EC
I85 L/H rear number plate lighting 166 t6 Ilc + IM E 186 R/H rear number plate lighting 167 t4 Ilc + IM E
190 Steering lock lighting 156 97 Ilc + IIC T
L20 Carburettor idle cut-out solenoid 25 IN M L30 L/H front brake caliper 48-49 d9 2N + IN U(g.) I31 R/H front brake caliper 50-51 dl 2N + IN U(d.!
L40 L/H front side lamp 149 a8 2M G
141 R/H front side lamp 151 a2 2M D 142 L/H rear lamp 165 L43 R/H rear lamp 166 I45 L/H rear lamp cluster t8 6G F
146 R/H rear lamp cluster t2 6G F
157 L/H stop lamp 104
* Particular Specification
8531-8532

ARRANGEMENT OF THE ELECTRICAL INSTALLATION
a @ CX25GTI 7185-t MA ’ 510.00/11
REP.
DESCRIPTION LOCATION
Crrcurt Wrnng CONNECTOR
Number HARN ES:
Channel-colour (or unit)
1 Front lighter and lrghtrng
crgar 172-186 15 3B-1 V H
10 Alternator
86 to 89
b6 Ilc & IN M & CA
44 Dtgital display
67 to 74 f5 l5V BA
45
Battery
2
b8 IN & IN
CP & CN
46 Instrument panel
63 to 108 g6 *
T
51 Ignition coil cyls 1 & 4
57-58 c6 . 3N Z
52 lgnrtion coil cyls 2 & 3
61-62 c6 3N Z
57 Fuel metering unit (option)
47-48 i5 4B 0
60 Air conditioning control unit (option)
12 to 15
h5 7B Q
81 Interior heating control unit
27 to 30 h5 8N K
84 Coolant level indicator unit
76 to 78 e4 56 D

89
Door locking indicator lamp unit
166-167
j5 5N H
90 Door locking control unit
159 to 169 j5 9v H
91
Remote control door locking unit
155 to 157
n5 8N P
92 Interior lighting timer
152 to 156 j5 7M H
93 Bulb failure detectron unit
33-109-I 10, 81 fo 83, 139. 191-200 s8 38 6B 6J L & 2xw
95 Junction/fuse box *
27 Side lamp audible warning 9 ?. *
*
157-l 58
g6 5N T
31
Flywheel datum sensor
60-61 c6 2M
Z
32 Flywheel teeth sensor
58-59 d6 2BI 2.
36 Ignition vacuum sensor
59 to 61 e3 30r CD
40 Mileage sensor (option)
50 e7 28 0
41 IEI control unit
54 to 65 e8 15B-15N Z
42 Injection electronic control unit
39 to 49 93 25N IC
70 Boot light switch
171 s6 1M + 1 E
74
Boot door locking switch
166 t5 2M
C
BO
Reversing lamp switch 33
d6 IN-1V
G
B5 Stop lamp switch
139 h6 IN-TM H
90 Hand brake switch
90
k5 2M H
92 Throttle spindle switch
45 to 47 b4 3N IC
29 lgnrtion switch
5-27, 38-130 h7 4M-48 95
30
L/H front door switch 154
f9 IM H
31 R/H front door switch
155
fl IM H
32 L/H rear door switch
157
k9 IM H
33 R/H rear door switch
158 kl 1M H
34
Glove box switch
170
f3 2xllc
H
35 Hydraulic fluid low pressure switch
81 e6 IM
G
$6
Hydraulic fluid level swatch
80 e8 1 Ic-1 M
G
$7
Coolant low level switch
76-77 e3 3R
D
* Particular Specification
8531-8532

10 MA ARRANGEMENT OF THE ELECTRICAL INSTALLATION
510.00/11
CX
25 GTI 7185 -+
REP. DESCRIPTION LOCATION CONNECTOR
Number HARNESS
Crrcuit Wiring Channel-colour (or unrt)
238 R/H front door lock switch 99
JI 2B H
239
L/H front door lock switch 98
j8 2B H
241 R/H rear door lock switch 101
ql 28 PD
242 L/H rear door lock switch 100
99 28 PG
243 Boot door lock switch 102 t5 2M C
244 Bonnet lock switch 97 a5 ,2M v
251 Height control switch 131-135
j5 2M & 4M H & 608
254 Lighting/direction indicator switch
107 to IIO- 192 to 198
97 5B-4M-3M T
255 Windscreen wiper/washer & horn switch 125 to 129-142
96 2B-4B-5B T
271 Air distribution switch 19 to 21 h5 4M \Q
278 Blower motor speed control rheostat 23 to 25 h6 2B ;1
279 Heater control & lighting
29 to 31-103-104 h4 58 K
280 Supplementary air control (injection) 38 b6 2N IM
285 Ignition suppressors (radio) 59 & 60 b6 2xlN 2
295
Air horn compressor 143
c7 IMV-IN A
300
Starter motor t
3 to 5 b5 IN-IR & IN CP & CA
302 Flowmeter 42 to 44 b2 5N IC
545 Fast idling electrovalve (air con option) 14 d2 *. 2xlV V
$65 Ashtray lighting 187 1’3 2B H
$70 Boot lighting 171 s4 IN-TIC F
i75 Glove box lighting 170 f4 lN-IM H
I80 Engine compartment lighting 185 c6 IN EC
385 L/H rear No. plate lighting 211 t6 IM-llc E
386 R/H rear No. plate lighting 212 t4 IM-llc
E
390 Steering lock lighting 191
97 2xllc T
$10 Air con compressor clutch 13
c6 IN V
$30 L/H front brake caliper 83-84 d9 2N& IN U
$31 R/H front brake caliper 85-86 dl 2N& IN U
140 L/H front side lamp 184 a8 2M G
F41 R/H front side lamp 186 a2 2M D
L42 L/H rear side lamp 200
c43
R/H rear side lamp 201
145
L/H rear lamp cluster t8 6G F
C46 R/H rear lamp cluster t2 6G F
L57 L/H stop lamp 139
158 R/H stop lamp 140
160
L/H rear fog lamp 191
1-61 R/H rear fog lamp 192
.62 L/H reversing lamp 33