1987 MAZDA 626 ABS

CHASSIS NUMBER LOCATION/ABBREVIATIONS/UNITS G
CHASSIS NUMBER LOCATION UNITS
67U0GX-005
ENGINE MODEL AND
NUMBER LOCATION
Nm (m-kg, ft-lb or in-lb). Torque
rpm Revolutions per minute A Ampere(s) V Volt(s) U Ohm(s) (resistance) kPa (psi) Pressure
(usually positive) mrriHg (in Hg) Pressure
(usually negative) W Watt
76G0GX-004
ABBREVIATIONS
67U0GX-007
AAS Auto adjusting suspension A/C Air conditioner ACC Accessories ABDC After bottom dead center ATDC After top dead center ATX Automatic transaxle ATF Automatic transmission fluid ABS Anti-lock brake system BBDC Before bottom dead center BTDC Before top dead center EX Exhaust EC-AT Electronically controlled automatic transaxle ESPS Engine speed sensing power steering EC PS Electronically-controlled power steering HLA Hydraulic lash adjuster IG Ignition IN Intake IC Integrated circuit INT Intermittent LH Left hand
MTX Manual transaxle M Motor OFF Switch off ON Switch on PCV Positive crankcase ventilation P/S Power steering P/W Power window RH Right hand RF-CX Comprex supercharged RF
engine
RF-N Normally aspirated RF engine ST Start sw Switch SST Special tools 4WS 4-wheel steering
PWS 2-wheel steering
4HAT 4-speed hydraulic automatic
transaxle Fl Fuel injection
76GQGX-005
G—9

ON-VEHICLE MAINTENANCE (CYLINDER HEAD) 1 C
76G01C-037
Apply engine oil
/
Cylinder head bolt
below head length
76G01C-038
(8) (4; D (5)
® ®
76G01C-039
3m-kg
(21.7ft-lb
Installation
Cylinder head
1. Throughly remove all dirt and grease from the top
of the cylinder block with a rag.
2. Place the new cylinder head gasket in position.
3. Remove any dirt and grease from the bottom sur-
face of the cylinder head.
4. Place the cylinder head in position.
5. Measure the length of the cylinder head bolt be-
low the head. If the length exceeds the maximum,
replace the bolt.
Length: 113.2—113.8 mm (4.457—4.480 in)
Maximum: 114.5 mm (4.508 in)
6. Apply engine oil to the threads and the seat face
of the cylinder head bolts.
7. Tighten the cylinder head bolts.
(1) Tighten the bolts to the specified torque, in the
order shown in the figure.
Tightening torque:
29 N-m (3.0 m-kg, 22 ft-lb)
(2) Make paint marks on the bolt heads, as shown
in the figure.
(3) With the paint marks as a reference point, turn
the cylinder head bolts another 90°
(90°—105°) in the tightening direction. Tight-
en them in the order.
(4) Then tighten them once again 90°
(90°—105°) in the tightening order.
Caution
Be absolutely sure that the bolts are tightened
in the proper order.

76G01C-044

1C—20

ASSEMBLY (CYLINDER
BLOCK)
1 C
6. Apply engine oil to the cylinder head bolts.
7. Tighten the cylinder head bolts.
(1) Tighten the bolts to the specified torque, in or-
der shown in the figure.
Tightening torque:
29 Nm (3.0 m-kg, 22 ft-lb)
4BG01B184
(2)Make paint marks on the bolt heads, as shown
in the figure.
(3)With the paint marks as a reference point, turn
the cylinder head bolts another 90°
(90°—105°) in the tightening direction. Tight-
en them in the order.
(4)Then tighten them once again 90°
(90°—105°) in the tightening order.
Caution
Be absolutely sure to tighten all bolts in the
order.
4BG01 B-185
Camshaft
1. Apply engine oil to the camshaft and journal part
of the cylinder head.
2. Set the seal cap.
3. Apply a coat of sealant (1016 77 739) to the area
shown in the figure.
4. Install the camshaft so that the key groove faces
directly upward.
4BG01 B-186
5. Install the camshaft caps according to the number

and
^
mark,
and loosely tighten the camshaft cap
nuts.
76G01C-172
1C—75

FUEL SYSTEM 4B
COMPONENT DESCRIPTIONS
Component Function Remarks
Air flow meter
Detects amount
of
intake
air;

sends signal
to
engine control unit Intake
air
thermo sensor and fuel pump
switch
are
integrated

Atmospheric pressure sensor
Detects atmospheric pressure; sends sig-nal
to
engine control unit

Circuit opening relay
Voltage
for
fuel pump while engine running

Clutch switch
Detects in-gear condition; sends signal
to
engine control unit Switch
ON
when clutch pedal released

Engine control unit
Detects signals from input sensors and switches; controls injector operation

Fuel filter
Filters particles from fuel

Fuel pump
Provides fuel
to
injectors • Operates while engine running
• Installed
in
fuel tank

Idle switch
Detects when throttle valve fully closed;
sends signal
to
engine control unit
Installed
in
throttle sensor

Ignition coil (-) terminal
Detects engine speed; sends signal
to
engine control unit

Ignition switch (ST position)
Sends engine cranking signal
to
engine control unit

Inhibitor switch
Detects in-gear condition; sends signal
to
engine control unit
Switch
ON in "N" or "P"
range

Injector
Injects fuel into intake port • Controlled
by
signals from engine control unit • High-ohmic injector

Intake air thermo sensor
Detects intake
air
temperature;
sends signal
to
engine control unit Installed
in air
flow meter

Main relay
Supplies electric current
to
injectors and engine control unit

Neutral switch
Detects in-gear condition; sends signal
to
engine control unit
Switch
ON
in-gear

Oxygen sensor
Detects Oxygen concentration; sends sig-nal
to
engine control unit
Zirconia ceramic and platinum coating

Pressure regulator
Adjusts fuel pressure supplied
to
injectors

Pulsation damper
Absorbs fuel pulsation

Throttle sensor
Detects throttle valve opening angle; sends signal
to
engine control unit
Integrated idle switch

Water thermo sensor
Detects coolant temperature;
sends signal
to
engine control unit

Water thermo switch
Detects radiator coolant temperature; sends signal
to
engine control unit ON: above 17°C (63°F)

76G04B-058
4B—43

4C FUEL SYSTEM
COMPONENT DESCRIPTION
Component Function Remark
Air flow sensor Detects amount of intake air;
sends signal to engine control unit
Clutch switch Detects in-gear condition; sends signal to engine control unit Switch ON when clutch pedal released
Engine control unit Detects signals from input sensors and switches; controls injector and fuel pump operations
Fuel filter Filters fuel
Fuel pump Provides fuel to injectors • Operates while engine running
• Installed in fuel tank
Fuel pump control unit (4WS) Monitors fuel level in left section; controls transfer pump operation
G signal pick-up Detects No.1 cylinder TDC; sends signal to engine control unit Installed in distributor
Idle switch Detects when throttle valve fully closed; sends signal to engine control unit Installed on throttle body
Ignition switch (ST position) Sends engine cranking signal to engine control unit
Injector Injects fuel into intake port • Controlled by signals from engine control unit • High-ohmic injector
Intake air thermo sensor Detects intake air temperature; send signal to engine control unit
Control relay Supplies electric current to injectors fuel pump and engine control unit
Ne signal pick-up Detects crank angle at 180° intervals; sends signal to engine control unit Installed in distributor
Neutral switch Detects in-gear condition; sends signal to engine control unit
Switch ON when in gear
Oxygen sensor (Unleaded fuel) Detects oxygen concentration; sends signal to engine control unit
• Zirconia ceramic and platinum coating • Integrated heater coil
Pressure regulator Adjusts fuel pressure supplied to injectors
Pulsation damper Absorbs fuel pulsation
Throttle sensor Detects throttle valve opening angle;
sends signal to engine control unit
Installed on throttle body
Transfer pump (4WS) Pumps fuel from the left to the right side Controlled by fuel pump control unit
Transfer pump switch (4WS) Detects fuel level in left section;
sends signal to control unit
Water thermo sensor Detects coolant temperature; sends signal to engine control unit
Water thermo switch (Unleaded fuel) Detects radiator coolant temperature; sends signal to engine control unit ON: above 17°C (63°F)
76G04C-088
4C-50

CLUTCH MASTER CYLINDER 6
CLUTCH MASTER CYLINDER
LHD RHD
13—22 N-m (1.3—2.2 m-kg, 9-16 ft-lb)
•19—26 N-m (1.9—2.6 m-kg, 14—19 ft-lb)
^13—22 N-m (1.3—2.2 m-kg, 9—16 ft-lb)
1. Clutch pipe
2. Nuts
76G06X-011
3. Clutch master cylinder
4. Gasket
76G06X-012
REMOVAL
1. Remove the ABS relay box. (LHD)
2. Disconnect the clutch pipe with the SST.
3. Remove the mounting nuts.
4. Remove the clutch master cylinder.
Caution
Clutch fluid will damage painted surfaces. Be
sure to use a container or rags to collect it.
If fluid does get on a painted surface, wipe it
off immediately with a rag.
86U06X-010
6-7

CLUTCH MASTER CYLINDER 6
76G06X-015
76G06X-016
fe
—t
86U06X-014
2. Remove the piston and secondary cup assembly
by blowing compressed air through the clutch pipe
installation hole.
Caution
When doing so, use a rag to prevent the pis-
ton and secondary cup assembly from project-
ing out.
3. Remove the spacer, primary cup, and return
spring.
4. Remove the tank cap and baffle.
5. Remove the tank set screw. (LHD)
6. Remove the reserve tank.
7. Remove the bushing, if necessary.
8. Remove the connector. (LHD ABS, RHD without
ABS)
9. Remove the joint bolt, then remove the one-way
valve piston and spring.(FE DOHC, RF-N, RF-CX)
INSPECTION
After cleaning all parts, check the following points.
Replace any parts with new parts, if necessary. Note
that rubber parts should be cleaned with clutch fluid.
1. Wear or damage of cylinder wall and/or piston.
2. Weakness of return spring.
3. Wear or damage of piston cup.
4. Damaged or bent reserve tank and/or reserve tank
installation part.
ASSEMBLY
Apply clean clutch fluid to the piston cup and the cyl-
inder bore before assembly.
Caution
After applying clutch fluid, check that no for-
eign material is on the cup.
86U06X-015
6-9

6 CLUTCH MASTER CYLINDER
1. Install the one-way valve spring and piston. (FE
DOHC, RF-N, RF-CX)
2. Tighten the joint bolt with new gasket. (FE DOHC,
RF-N, RF-CX)
Tightening torque:
83—113 Nm (8.5—11.5 m-kg, 61—83 ft-lb)
76G06X-017
3. Install the connector and new gaskets. (LHD ABS,
RHD without ABS)
Caution
Install the connector at the angle shown in the
figure.
Tightening torque:
20—29 N m (2—3 m-kg, 14—22 ft-lb)
76G06X-018
4. Install the new bushing.
5. Install the reserve tank, baffle and tank cap.
6. Install the following parts:
(1) Return spring
(2) Primary cup
(3) Spacer
(4) New piston and secondary cup assembly
Caution
A new primary cup, piston, and secondary cup
assembly must be used.
76G06X-019


w

\o/
7. While pressing the piston with a screwdriver, in-
stall the snap ring.
76G06X-020
6-10
•