clutch MAZDA 232 1990 Suplement Owner's Manual

F2 CONTROLSYSTEM
erminat Input ’ Output Connected to Test condition Correct voltage Remark
1N 0 I Throttle sensor Accelerator pedal released &low l.OV j Ignition switch
(Idle switch)
Accelerator pedal depressed Approx. 12V *N
IO I 0 j [ Stoplight switch Brake pedal released Betow 1 .OV -
1P j 0 1 i P/S pressure lgnitlon switch ON Approx. 12V
I
switch
f/S ON at idle Below 1 .UV
I
P/S OFF at idle Approx. 12V -
I
to 0 A/C switch A/C switch ON
NC switch OFF Beiow 2.W ignition switch
ON and blower
Approx* t2V motor ON
i
1R 0 Electric fan switch Fan operating (Engine coolant tempera- Betow l.OV
ture over 91 *C (t96*F) or diagnosis con-
-
nector terminal TFA grounded)
Fan not operating (Idle) Approx.. f 2V
IS 0 Blower control Blower controf switch OFF or 1st position Approx. 13 Ignition switch
switch
Blower control switch 2nd or higher po- Below 7 .OV ON
sition
IT
Cl Rear window
defroster switch Rear window defroster switch OFF
Rear window defroster switch ON Below 1 .OV Ignition switch
Approx. 12V ON
1u 3 Headlight switch Headlights ON Approx. 12V
-
Headlights OFF Below 1 .OV
-Iv Cl ’ Neutral/Clutch
Neutral position or clutch pedal Below I .OV
switches
depressed
Others Approx. 12V
l-7 I r
f
2V 2W 2U 25 20 20 2M 2K 21 2G IZE 2C 2A IU IS 10 10 IM 1K 11 1G rE tC IA
22 2X (2V 2T 2R 2P 2N 2L 2J 2H’ZF 20 2B fV 1T 1R IP IN 1L 7J III If ItI 1B l F2-62

CONTROL SYSTEM F2
Incorrect voltage
Always below 1 .OV Possible cause
l Throttle sensor misadjustment l Short circuit in wiring from throttle sensor to ECU terminal IN l ECU malfunction
Always approx. f 2V
Atways below 1 .OV (Stopfights OK)
Always below 1 .OV
l Throttle sensor misadjustment l Open circuit in wiring from throttle sensor to ECU terminal IN l Open ctrcuit in wiring from throttle sensor to ECU terminal 20
l Open crrcurt in wiring from stoplight switch to ECU terminal 10
l P/S pressure switch malfunction l Short circuit in wirrng from P/S pressure switch to ECU termrnai 1 P
l ECU malfunction
Always approx. 12V
Atways below 2.5V (Btower fan OK) . P/S pressure switch malfunction
l Open circuit in wiring from P/S pressure switch to ECU terminal I P l Open circuit in wiring from P/S pressure switch to ground
l A/C switch malfunction l Short circuit in wiring from A/C switch to ECU terminal 1 Q l Poor connection at ECU connector l ECU malfunction
Always approx. 12V (Blower fan OK)
l ’ A/C switch malfunction l Open c~rcurt in wiring from NC switch to ECU terminal 1Q l ken circuit H-I winnu from A/C switch to blower control switch
Always below 1.W
l Open or short circuit in wiring from fan relay to ECU terminal IR
(Electrkal cooling fan UK} l ECU malfunctron
Always below 1 .OV (Blower fan OK)
l Short crrcutt in wiring from blower control swrfch to ECU terminal IS l Poor connection at ECU connector l ECU malfunction
Always approx. 12V (Blower fan OK)
Always below Illumination lamp
1.w ON when rear
window defroster
switch ON 1
l Open circurt in wrring from blower control switch to ECU terminat IS
I
l Open or short circuit rn wiring from rear window defroster switch to ECU
terminal 1 T
ftlumination lamp
never ON
l Open circuit in wiring from ignition switch to rear window defroster switch
l Rear window defroster switch malfunction I
Always below 1 .OV (Headlights OK)
l Open or short circurt in wiring from headlight relay to ECU termtnal 1 U
Always below 1 .OV
Always approx. l2V
l Neutral switch malfunction l Clutch switch malfunction l Short circuit in wiring from ECU terminal IV to neutral or clutch switch
l Neutral switch maifunctton l Clutch switch malfunction l Open circuit in wiring from ECU terminal IV to neutral or clutch swttch
l Poor connection at ECU connector
93GOFZ789
F2-63

H
CLUTCH
iNDEX ..*..*.............*..*..............................* l-l- 2
OUTLINE .................................................. l-b- 4
OUTLtNE OF CONSTRUCTION
................. H- 4
SPECtFlCATtUNS ....................................
H- 4
CLUTCH CONTROL
.................................... t-i- 5
CLUTCH PEDAL ..................................... H- 5
CLUTCH MASTER CYLINDER ................... H-
7
RELEASE 5EARlNG ................................ H- 8
1 SERVICE /
SUPPLEMENTAL SERVICE INFORMATION.. H- 9
TROUBLESHOOTlNG
GUIDE.. .................... Ii- 9
CLUTCH FLUID (WITH ABS) ......................
H-l 0
PREPARATION ....................................... u-IO
REPLACEMENT ......................................
H-10
CLUTCH PEDAL (BP DOHC TURBO) ........... H-1 1
REMOVAL I INSPECTION / INSTALLATtON . . H-11
CLUTCH MASTER CYLINDER
(BP DOHC TURBO OR WITH ABS)
............ H-f 3
PREPARATION .......................................
u-1 3
REMOVAL I INSPECTION I INSTALLATION
(BP DOHC TURBO) ............................... H-13
AIR BLEEDlNG (-WtTH ABS) ...................... ti-14
OVERHAUL
(BP DOHC TURBO). ............... H-15
CLUTCH RELEASE CYLINDER (WITH ABS). H-l 7
PREPARATION .......................................
H-l 7
AtR
BLEEDING (WITH ABS). ..................... H-17
CLUTCH UNIT
.......................................... u-1 8
PREPARATION
....................................... H-f 8
REMOVAL I INSTALLATION ...................... H-19
93GOHX-701

H INDEX
INDEX
I
LHD
@ ,a
1,
FLUID SPEClFlCATlON
OR FMVSS116 DOT-3
(WITH ABS) f . Clutch pedal (8P DOHC Turbo)
Removal I Inspection I
93GOHX-7C 4. Clutch cover
Removal I Installation . . . . . . . . . . . . . . . . . . page H-1 9
Installation . . . . . ..+., ._. . . . . . . -. . . . . . . . . _. . page H-l 1
2. Clutch master cylinder
(BP DOHC Turbo or with ABS)
Removal I Inspection I
Installation (BP DOHC Turbo). . page H-l 3
Air Ueeding (with ABS) . . .._........_ page H-14
Overhaul (BP DOHC Turbo) _...._ page H-15
3. Ctutch release cylinder (with ABS)
Air bleeding .._.,._.......,............._... page H-l 7 5. Clutch disc
Removal I f
6. Pilot bearing
Removal I I
7. Flywheel
Removal /
H-2 nstallation .................. page H-l 9
nstallation. .................
page H-f 9
nstallation .................. page H-l 9

i
1
INDEX H
I. Clutch pedal (BP DOHC Turbo)
Removal I inspection /
Installation ................................ page H-l 1
2. Crutch master cylinder (BP DUHC Turbo)
Overhaul .....................................
page H-l 5
3. Clutch cover
Removal I Installation.. ................
page H-t 9 4. Clutch disc
Removal I Installation..
................ page H-19
5. Pilot bearing
Removal J Installation ..................
page H-l 9
6. Flywheel
Removal I installation.. ................ page H-l 9
H-3

H OUTLINE
OUTLINE
OUTLINE OF CONSTRUCTION
A hydraulic clutch control mechanism is used.
The basic construction is the same as that of 323 2WD model, but there is no interchangeability of parts
except for the release cylinder.
1. An assist/return spring is used on the BP DOHC Turbo model to reduce the required clutch pedal effort..
2. The hydraulic clutch master cylinder for the 8P DOl-lC Turbo model has a built-in check valve.
3. To improve clutch operation feeling and increased parts life, a friction plate and needle roller bearings
are used between the release fork and the release bearing.
93GOHX-704
SPECIFICATIONS
Hem
Clutch control Engine/Transaxle
BP SUHC BP DOHC Turbo
GSMX-R
Hydrautic
Clutch cover
Type
Set load
N (kg, lb) Diaphragm spring
3,846 (392, 862) 5,494 (560, I ,232)
Outer diameter 1
mm (in) 225 (8.858) 230 (9.055)
I 1 nner diameter mm (in)
I 150 (5.906)
I 155 (6.102) I
CI utch disc
Pressure plate side
mm {in) 4.1 (0.161) 3.2 (0.126)
Thickness f
Flywheel side
mm (in) 3.5 (0.138) 3.2 (0. f 26)
I Type I Suspended
I
Clutch pedal LHD 6.55 Pedal
ratio
RHD 6.7
Full stroke mm (in)
I 135 (5.32)
I
Height (With carpet) mm [in)
I I 96-204 (7.72-8.03)
I
Master cylinder Inner diameter
mm {in)
I 15.87 (0.625)
Release cylinder inner diameter
mm (in)
I - 19.05 (0.750)
I
Clutch fluid SAE J1703 or FMVSSI 16 DOT-3
93GOHX-705
H-4

CLUTCH CONTROL H,
CXUTCH CONTROL
CLUTCH PEDAL
l An assistireturn spring is used on BP DO-K Turbo engine-equipped models to reduce the required pedal
effort.
l The assist/return spring is mounted vertical to the pedal for a compact arrangement.
wiNGi B G”3 * RANGE A
RANGE B + + RANGE A
Operation With the clutch pedal fully
released, the assist/return spring is compressed, causing force F to act upon ful-
crum 0,
As a result, force Fy is created, and acts upon fulcrum @ to hold the pedal outward.
1 1 When clutch pedal depressed.
(1) Fukrum @ within range A
When the pedal is depressed, it moves inward, centered upon fulcrum @.
Fy, which is the force opposing pedal movement, acts upon futcrum @ until fulcrum @ crosses the
imaginary line connecting fulcrums
@ and @
As a result, there is a slight feeling of resistance when the clutch pedal is first depressed.
(2) With fulcrum @ within range 8
When fulcrum @ crosses the imaginary line between fulcrums @ and @, Fy now acts in the same
direction as pedal
movement, thus reducing the force required to depress the pedat.
H-5

H CLUTCH CONTROL
RANGE B CT] e RANGE A
RANGE B ++I + RANGE A
93GOHX-70
2. When clutch pedal released.
(1) With fulcrum @ within range B
When the clutch pedal is released, reaction force f (from clutch master cylinder push rod) is applied,
and fy force pushing outward overcomes Fy force, with the result that the clutch pedal moves out-
ward, centered upon fulcrum @.
(2) With fulcrum @ within range A
When futcrum @ crosses the imaginary iine 4etween fulcrums @ and a, force Fy, which is a result
of force F trying to expand the spring, is added to fy and pushes the pedal fully outward.
t-l-6

C1UTCl-i CONTROL H
CLUTCH MASTER CYLINDER
‘CHECK VALVE
RHD
CHECK VALVE
93GOHX-708 A hydraulic clutch master cylinder with a built-in check valve is used on the BP DOHC Turbo model.
This is to provide smooth engagement of the clutch disc by controlling (by the check valve) the flow of fluid
from the clutch release cylinder back to the master cylinder when the clutch pedal is released, thus cushion- ing the impact “shock”.
l-l-7

H CLUTCH CONTROL
RELEASE BEARING
ROLLER BEARING
CLUTCH PEDAL RELEASED
RELEASE FORK RELEASE E?EARfNG
CLUTCH PEDAL DEPRESSED To improve clutch operation feeling and increased parts life, a newly designed friction plate and needle roller
bearings are used between the release fork and the release bearing.
With
the kdusion of this friction plate, the force required to depress the clutch pedal is reduced because
the usual sliding-contact action between the release bearing and the release fork is changed to a rolling
action of the friction plate,
H-8