MAZDA 626 1987 Workshop Manual

ANTI-LOCK BRAKE SYSTEM (ABS) 1 1
CONTROL UNIT CIRCUIT
Inspection of Control Unit Circuit
1. Start the engine, and run it for 10 seconds.
2. Disconnect the connectors from the control unit. Check the connector at the harness side as shown
in the table below.
Terminal Connection or measured item Check item Tester connection Condition Voltage or
resistance

Q-01 11 -pins
2A (W),
2B (R)
Wheel speed sensor
Left front Voltage (AC) 2A (W)
- 2B
(R) Turn wheel
1
revolution
per second More than 0.25V (AC)
Q-01 11 -pins
2A (W),
2B (R)
Wheel speed sensor
Left front
Resistance
2A (W)
- 2B
(R)

—
800-1.2000
Q-01 11 -pins
2C (Y),
2D
(0)
Wheel speed sensor
Right front Voltage (AC) 2C (Y)
-
2D (0) Turn wheel
1
revolution
per second More than 0.25V (AC)
Q-01 11 -pins
2C (Y),
2D
(0)
Wheel speed sensor
Right front
Resistance
2C (Y)
-
2D (0)

—
800-1,2000
Q-01 11 -pins 2E (YG),
2F (YL)
Wheel speed sensor
Left rear Voltage (AC) 2E (YG)
- 2F
(YL) Turn wheel
1
revolution
per second More than 0.25V (AC) Q-01 11 -pins 2E (YG),
2F (YL)
Wheel speed sensor
Left rear
Resistance
2E (YG)
- 2F
(YL)

—
800-1,200G
Q-01 11 -pins
2H (G).
2J
(L)

Wheel speed sensor
Right rear Voltage (AC) 2H (G)
- 2J
(GR)
Turn wheel
1
revolution
per second More than 0.25V (AC)
Q-01 11 -pins
2H (G).
2J
(L)

Wheel speed sensor
Right rear
Resistance
2H (G)
- 2J
(GR)

_
800-1,200fl
Q-01 11 -pins
21 (GR) Low pressure switch Continuity 21 (GR)
-
Ground
—
Continuity
Q-01 11 -pins
2K (LB) High pressure switch Continuity 2K (LB)
-
Ground
—
Continuity
Q-01 11 -pins
2L (WB) Alternator output Voltage 2L (WB)
-
Ground Run engine Approx.
14V

Q-01
17-pins
A (WG) Brake light switch Voltage A (WG)
-
Ground Depress brake pedal 12V
Q-01
17-pins
B (RY) Motor Continuity B (RY)
—
Ground
—
Continuity
Q-01
17-pins
C (LO) Motor relay Resistance C (Lo)(© test-lead)-J
—
Approx. 60—700
Q-01
17-pins
D (GR) Check connector Continuity D (GR)
- A
(GR, Q-07)
—
Continuity
Q-01
17-pins
E (BL) Fail-safe relay Resistance E (BL)
- G
(BG)
—
Approx. 70-800
Q-01
17-pins
F (LY) Warning light Continuity F (LY)
-
Ground
—
Continuitv Q-01
17-pins G (BG) Battery Voltage G (BG)
—
Ground Turn ianition
SW ON
12V Q-01
17-pins H (GB) Check connector Continuitv H (GB)
- B
(GB. Q-07)
—
Continuitv
Q-01
17-pins
J (YG) Solenoid valve
Resistance
JfYG)
- K
(Br)

-
Approx.
5.5—7.00
Q-01
17-pins
K (Br) Solenoid valve
Resistance
JfYG)
- K
(Br)

-
Approx.
5.5—7.00
Q-01
17-pins
M (YR) Solenoid valve Resistance M (YR)
- 0
(BW)
-
Approx.
5.5—7.00
Q-01
17-pins
0 (BW) Solenoid valve Resistance M (YR)
- 0
(BW)
-
Approx.
5.5—7.00
Q-01
17-pins
Q (YW) Solenoid valve
Resistance
Q (YW)
- R
(L)

-
Approx.
5.5—7.00
Q-01
17-pins
R (L) Solenoid valve
Resistance
Q (YW)
- R
(L)

-
Approx.
5.5—7.00
Q-01
17-pins
L (B)
Ground circuit Continuity
L (B)
—
Ground
Continuity
Q-01
17-pins
N
(B)
Ground circuit Continuity N (B)
—
Ground Continuity
Q-01
17-pins
P (B)
Ground circuit Continuity
P (B)
—
Ground
C (B.Q-07)
-
Ground
Continuity
4-pins C(B)
Ground circuit Continuity
P (B)
—
Ground
C (B.Q-07)
-
Ground
Continuity

Control Unit Connector View from harness side
Q-01 (11-pin)

LB
GR YG Y W
>1 ,1 U;.l Ki -X
1 L G VL rf
Q-01 (17-pin)
Q-01 ABS Control Unit [R]
YW BW YR Br 8G BL LO WG
icL olL
MIL
ICL G(=L tl ij^" llyl
>1
CjJ
Lt|J JCjJ fiC|3 H«|3
L B B B ffi SB L* GS RY
Check connector (4-pin)
Q-07 Check Connector [RJ
B GR
LY GB
86U11X-199
11—99

12
WHEELS AND TIRES
OUTLINE 12— 2
SPECIFICATIONS 12— 2
TROUBLESHOOTING GUIDE 12— 2
WHEELS AND TIRES 12—3
INSPECTION AND ADJUSTMENT 12— 3
TIRE ROTATION 12—4
WHEEL BALANCE 12— 5
WHEEL MOUNTING 12— 5
SPECIAL NOTE 12—5
86U12X-001

1 2 OUTLINE, TROUBLESHOOTING GUIDE
OUTLINE
SPECIFICATIONS
Type
Item Standard Temporary spare (if equipped)

Wheel
Size
5-J
x 13

4-T
x 15

Wheel
Size 5 1/2-JJ
x 14
4-T
x 15

Wheel
Size
6-JJ
x 15

4-T
x 15

Wheel
Off set mm (in) 42 (1.65) 53 (2.09)
Wheel Diameter
of
pitch circle
mm
(in) 114.3 (4.5) Wheel
Material Steel
or
aluminum alloy Steel
Wheel
Number
of
fixing nuts
13 inch-wheel 4
4
or 5

Wheel
Number
of
fixing nuts 14 inch-wheel 5 4
or 5

Wheel
Number
of
fixing nuts 15 inch-wheel 5 4
or 5

Tire
Size
13 inch-wheel
6.45—13—6PR
165 SR13 165/80R13 82S 185/70HR13 185/70R13 85H
T125/70D15
Tire
Size 14 inch-wheel
185/70HR14 185/70R14 87H 185/70R14 88H 185/70VR14
T125/70D15
Tire
Size
15 inch-wheel 195/60R15 86H
195/60VR15
T125/70D15
Tire
Air pressure
kPa (kg/cm2,
psi)
Front 216 (2.2, 31) or 196 (2.0, 28) "See tire labels for application 412(4.2, 60)
Tire
Air pressure
kPa (kg/cm2,
psi) Rear 177 (1.8, 26)
412(4.2, 60)

TROUBLESHOOTING GUIDE 76G12X-001
Problem Possible Cause Remedy Page
Premature tire wear

Incorrect tire pressure Adjust 12-
2
Tire squeal
Incorrect tire pressure Tire deterioration
Adjust ReDlace
12-
2
Road noise or body vibration
Insufficient tire pressure Unbalanced wheel(s) Deformed wheel(s)
or
tire(s) Irregular tire wear
Adjust Adjust Repair
or
replace Reolace
-1

12-
2
12-
5
Steering wheel vibration
Irregular tire wear Right and left tread depths different Deformed
or
unbalanced wheel(s) Deformed tire(s) Unequal tire pressures Loose lug nuts
Replace Replace
Replace
or
adjust Replace Adjust Tiahten
12-
5

12—
2
12-
5
Uneven (one-sided) braking
Unequal tire pressures Adjust 12-
2
Steering wheel doesn't return properly, or pulls to either left or right while vehicle moving on level road surface

Incorrect tire pressure Irregular tire wear (left and right are different) Unequal tire pressures Different types
or
brands
of
tires mixed (right/left) Improperly tightened lug nuts
Adjust Replace Adjust Replace Tighten
12-
2

12—
2

12-
5
General driving in-stability

Unequal tire pressures Deformed
or
unbalanced wheel(s) Loose lug nuts
Adjust Replace
or
adjust Tiahten
12-
2
12-
5
12-
5
Excessive steering wheel play
Loose lug nuts Tighten 12-
5
76G12X-002
12-2

WHEELS AND TIRES 1 2
86U12X-004
\k
y
i jYj

/ <4/

/ v Wear platform
Wear indicators
86U12X-005
(a) (b)
Shoulder wear Center wear
(c)
Feathered edge
(d)
*f tftiit t
Toe-in or toe-out wear Uneven wear
WHEELS AND TIRES
INSPECTION AND ADJUSTMENTS
Check the following, and adjust or replace as
necessary.
1. Air pressure
Check the air pressure of all tires, including the
spare tire, with an air pressure gauge.
(Refer to page 12—2.)
Caution
The air pressure must be measured when the
tire is cold.
2. Tire wear
Specifications
Remaining tread
Ordinary tires: 1.6 mm (0.063 in) min.
(Tire should be replaced if wear indicators are
exposed.)
Snow tires: 50% of tread
(Tire should be replaced if wear indicators are
exposed.)
Troubleshooting guide
Abnormal tire wear patterns shown in the illustra-
tion can occur. Refer to the chart for the probable
causes and remedies.
Probable cause Remedy
(a) • Underinflation (both sides worn) • Incorrect camber (one side worn) • Hard cornering • Lack of rotation
• Measure and adjust pressure • Repair or replace axle and suspension parts • Reduce speed • Rotate tires
(b) • Overinflation
• Lack of rotation
• Measure and adjust pressure • Rotate tires
(c) • Incorrect toe-in • Adjust toe-in
(d) • Incorrect camber or caster • Malfunctioning suspension • Unbalanced wheel • Out-of-round brake drum or disc • Other mechanical con-ditions • Lack of rotation
• Repair or replace axle and suspension parts • Repair or replace • Balance or replace • Correct or replace
• Correct or replace
• Rotate tires
76G12X-003
12-3

12 WHEELS AND TIRES
86U12X-007
86U12X-008
3. Wheel deflection
Set the probe of a dial indicator against the wheel,
and turn the wheel one full revolution.
Wheel deflection limit mm (in)

Horizontal Vertical
Steel wheel 2.5 (0.098) 2.0 (0.079) Aluminum wheel 2.0 (0.079) 2.0 (0.079)

4. Cracks, damage, or foreign matter (such as metal
pieces, nails, and stones) in the tire and cracks,
deformation, and damage to the wheel
5. Loose wheel lug nut(s)
6. Air leaking from the valve stem
TIRE ROTATION
To prolong tire life and assure uniform wear, rotate
the tires every 6,000 km (3,750 miles) or sooner if ir-
regular wear develops.
Caution
a) Do not include "TEMPORARY USE ONLY"
spare tire in rotation.
b) After rotating the tires, adjust each tire to
the specified air pressure. (Refer to page
12—2.)
Note
The optional unidirectional wheels are marked
to indicate direction of travel.
Unidirectional wheel
Left side Right side
Front Front
76G12X-004
12—4

WHEELS AND TIRES 1 2
WHEEL BALANCE
If a wheel becomes unbalanced or if a tire is replaced
or repaired, the wheel must once again be balanced
to within specification.
Maximum unbalance (at rim edge): g (oz)

13 inch-wheel 11 (0.39)
14 inch-wheel 10 (0.35)
15 inch-wheel 9 (0.32)

76G12X-005
Balance
weight
Outside
Balance
weight
86U12X-011
Caution
a) Do not use more than two balance weights
on the inner or outer side of the wheel, if
the total weight exceeds 100 g (3.5 oz), re-
balance after moving the tire around on the
rim.
b) Attach the balance weights tightly so that
they do not protrude more than 3 mm (0.12
in) beyond the wheel edge.
c) Select suitable balance weights for steel or
aluminum alloy wheels.
d)Do not use an on-car balancer on ATX
models. Use of this type of balancer may
cause clutch damage.
WHEEL MOUNTING
Tighten the lug nuts to the specified torque in a criss-
cross fashion.
Tightening torque:
88—118 N-m (9—12 m-kg, 65—87 ft-lb)
Caution
a) The wheel-to-hub contact surfaces must be
clean.
b) Never apply oil to the nuts, bolts, or wheels;
doing so might cause looseness or seizure
of the lug nuts.
86U12X-012
SPECIAL NOTE
Regarding wheels and tires:
1. Do not use wheels or tires other than the specified types.
2. Aluminum wheels are easily scratched. When washing them, use a soft cloth, never a wire brush.
If the vehicle is steam cleaned, do not allow boiling water to contact the wheels.
3. If alkaline compounds (such as salt water or road salts), get on aluminum wheels, wash them as
soon as possible to prevent damage. Use only a neutral detergent.
86U12X-013
12-5

1 2 WHEELS AND TIRES
Regarding tire replacement:
Note the following points when tires are to be removed from or mounted onto the wheels.
1. Be careful not to scratch the tire bead, the rim bead, or the edge of the rim.
2. Apply a soapy solution to the tire bead and the edge of the rim.
3. Use a wire brush, sandpaper, or cloth to clean and remove all rust, dirt, etc., from the rim edge
and the rim bead. For aluminum wheels, use only a cloth for this purpose; never use a wire brush
or sandpaper.
4. Remove any pebbles, glass, nails, etc., embedded in the tire tread.
5. Be sure the air valve is installed correctly.
6. After mounting a tire onto a wheel, inflate the tire to 250—300 kPa (2.55—3.06 kg/cm2,35.55—42.66
psi). Check to be sure that the bead is seated correctly onto the rim and that there are no air leaks.
Then reduce the pressure to the specified level.
7. If a tire iron is used to change a tire on an aluminum wheei, be sure to use a piece of rubber be-
tween the iron lever and the wheel in order to avoid damage to the wheel. Work should be done
on a rubber mat, not on a hard or rough surface. 76G12X-006
12—6

13
SUSPENSION
OUTLINE 13— 2
STRUCTURAL VIEW 13— 2
SPECIFICATIONS 13— 4
TROUBLESHOOTING GUIDE 13—11
FRONT SHOCK ABSORBER AND
SPRING 13—13
REMOVAL AND INSTALLATION 13—13
DISASSEMBLY AND ASSEMBLY 13—15
FRONT LOWER ARM 13—18
REMOVAL AND INSTALLATION 13—18
FRONT STABILIZER (4WS) 13—23
REMOVAL AND INSTALLATION 13—23
FRONT STABILIZER 13—27
REMOVAL AND INSTALLATION 13—27
REAR SHOCK ABSORBER AND SPRING .. 13—29
REMOVAL AND INSTALLATION 13—29
DISASSEMBLY AND ASSEMBLY 13—32
LATERAL LINK AND TRAILING LINK 13—34
REMOVAL AND INSTALLATION 13—34
REAR LOWER ARM AND TRAILING
LINK (4WS) 13—36
REMOVAL AND INSTALLATION 13—36
REAR STABILIZER 13—39
REMOVAL AND INSTALLATION 13—39
REAR STABILIZER AND CONTROL
LINK (4WS) 13—41
REMOVAL AND INSTALLATION 13—41
REAR CROSSMEMBER (4WS) 13—44
REMOVAL AND INSTALLATION 13—44
FRONT WHEEL ALIGNMENT 13—50
REAR WHEEL ALIGNMENT 13—52
76G13X-001

13 OUTLINE
OUTLINE
STRUCTURAL VIEW
Front Suspension
86U13X-002
13—2

OUTLINE 13
Rear Suspension
4-wheel steering (4WS)
86U13X-003
13—3