1987 MAZDA 626 power steering

1 0 ELECTRICAL COMPONENTS OF ELECTRONICALLY-CONTROLLED POWER STEERING (ECPS)
OK
Check for continuity between each terminals of steer-ing angle sensor and control unit harness side con-nector.
Terminal Continuity Angle sensor Control unit Continuity
(G) KG) Yes
(GY) H(GY) Yes
(GW) J(GW) Yes
Repair wiring harness (Control unit to angle sensor).
OK
Replace control unit.
OK
Replace control unit.
76G10X-043
10—92

ELECTRICAL COMPONENTS OF ELECTRONICALLY-CONTROLLED POWER STEERING (ECPS) 1 0
Broken wiring harness (Fuse box
P/S—5 to Control unit, Control unit or to Body ground)
Measure voltage between terminal of control unit
connector and body ground with ignition ON.
Terminal Voltage UK Replace the control unit.
E(BG) Approx. 12V
D(B) Approx. OV
NG
Replace METER 10A fuse or repair wiring harnesses (Fuse box to Control unit or Control unit to Body ground).
86U10X-218
86U10X-219
Power Steering Solenoid Valve
Inspection
1. Listen for actuation sound of the solenoid valve
when applying 12V between A and B terminals.
2. If no sound is heard, check the resistance of the
solenoid valve with an ohmmeter.
Terminals Resistance
A — B 3.4—6.9 Q
3.
If
there is no continuity, replace the solenoid valve.
Steering Angle Sensor
Inspection
Refer to page 15—16.
Vehicle Speed Sensor
Inspection
Refer to page 15—88.
76G10X-044
10-93

POWER BRAKE UNIT 1 1
76G11X-034
INSPECTION OF CHECK VALVE
Note (MTX)
The check valve is pressed into the vacuum
hose. There is an arrow on the hose surface
to indicate direction of installation.
Inspection
1. Disconnect the vacuum hose from the engine.
2. Apply suction and pressure to the hose from the
engine side. Check that air flows only toward the
engine.
If the air passes in both directions or not at all, re-
place the check valve (along with the hose).
REMOVAL
Remove in the sequence shown in the figure, referring to removal note for specially marked parts.
1. Fluid level sensor connector
2. Vacuum switch coupler
(RF, RF-CX)
3. Brake pipe
4. Master cylinder
5. Clutch pipe holder
6. Vacuum hose and check
valve
7. Clevis pin
8. Steering shaft
76G11X-069
9. Power brake unit
10. Gasket
11. Locknut
12. Operating lever
11-29

1 1 POWER BRAKE UNIT
Removal Note
Steering Shaft
To remove the mounting nuts of the power brake unit,
the steering shaft must be removed. (Refer to page
10—22 for removal and installation procedures.)
76G11X-102
DISASSEMBLY AND ASSEMBLY
1. Disassemble in the sequence shown in the figure, referring to disassembly note for specially marked
parts.
2. Inspect each part, referring to inspection note.
3. Assemble in the reverse order of disassembly, referring to assembly note for specially marked parts.
8.8—13 N-m (90-130 cm-kg, 78—112 in-lb)
1. Dust boot
2. Rear shell assembly
3. Retainer
4. Bearing
5. Dust seal
6. Retainer
7. Air filters
8. Air silencer
9. Diaphragm and plate
10. Power piston assembly
11. Retainer key
12. Valve rod and plunger as-
sembly
13. Reaction disc
76G11X-070
14. Spring
15. Push rod
16. Front shell assembly
17. Retainer
18. Seal
19. Vacuum switch (RF, RF-CX)
11-30

30 TECHNICAL DATA
9. FRONT AND REAR AXLES
Transaxle type MTX ATX
Item Non-Turbo Turbo Non-Turbo Turbo
Driveshaft

Joint type Inside Ball joint Tripod joint Joint type Outside Ball joint Ball joint
Shaft length mm (in) Right 360.0 (14.17) 355.5 (14.00) 355.5 (14.00) 348.8 (13.73) Shaft length mm (in) Left 360.0 (14.17) 355.5 (14.00) 355.5 (14.00) 348.8 (13.73)
Shaft diameter mm (in) 24 (0.94) 26 (1.02) 24 (0.94) 26 (1.02)

Front axle

Front wheel bearing end play mm (in) 0.2 (0.0079) max.

Rear axle

Rear wheel bearing end play mm (in) 0.2 (0.0079) max.

10. STEERING SYSTEM
u _ Type Item ——- - -. Manual steering Power steering

Steering wheel Outer diameter mm (in) 380 15.0) Steering wheel Turns lock
to
lock 4.32 2.93
Steering shaft and joints
Shaft type Collapsible
Steering shaft and joints Joint type Cross joints
(2)
Steering shaft and joints
Tilt stroke mm (in) 40 (1.6)
Front steering gear Type Rack and pinion Front steering gear Gear ratio
oo
(infinite)
Power steering fluid
Capacity liter
(US quarts, Imp quarts)
2WS
—
0.9 (0.95, 0.79)
Power steering fluid
Capacity liter
(US quarts, Imp quarts) 4WS
—
1.0 (1.06, 0.88) Power steering fluid
Type 2WS 4WS
—
Dexron
II or M III
30—36

40 SPECIAL TOOLS
TOOL NUMBER & DESCRIPTION PRIORITY ILLUSTRATION

49 F027 005
Attachment
62
A

®
STEERING
TOOL NUMBER & DESCRIPTION PRIORITY ILLUSTRATION

49 0118 850C
Puller, ball joint B
49 0180 51 OB
Attachment B

jr

49 B032 302
Adapter A
49 H002
671

Adapter, pow-er steering gauge
A
49 W023 585A
Adjust wrench A



49 8038
785

Boot installer,
ball joint dust
cover
A

40—8
TOOL NUMBER & DESCRIPTION PRIORITY ILLUSTRATION

49 M005 795
Installer set,
oil
seal A

TOOL NUMBER & DESCRIPTION PRIORITY ILLUSTRATION

49 1243 785
Boots installer, tie rod B

®

49 0208 701A
Air out tool,
boot
B
49 1232 670A
Gauge set,
power steering
A
49 G033
108

Adapter, caster camber gauge
A
49 0727 575
Puller, socket
joint
(4WS)
B

4F

49 G032 3A1
Joint hose A

SPECIAL TOOLS 40
TOOL NUMBER
& DESCRIPTION PRIORITY ILLUSTRATION

49 G032 3A0
Repair set, power steering (ESPS)
A
0 "
'
= 1 6 J
•Dn
0 O
•ujQ

BRAKE
TOOL NUMBER
& DESCRIPTION PRIORITY ILLUSTRATION

49 0259 770B
Wrench, flare
nut
A
49 0221 600C
Expand tool,
disc brake
B
49 FA18 602
Wrench disc,
brake piston B

SUSPENSION
TOOL NUMBER & DESCRIPTION PRIORITY ILLUSTRATION

49 G028 2A0
Replacer lower arm bush (4WS)
A
49 G034 2A0
Replacer lower arm bush A
-
Q
0a0(D
TOOL NUMBER & DESCRIPTION PRIORITY ILLUSTRATION
— — —
TOOL NUMBER & DESCRIPTION PRIORITY ILLUSTRATION

49 B043 002
Bearing installer (Rear disc)
A
49 F043
001

Adjust gauge A
49 B043 001
Adjust gauge
(FE
DOHC-R.H.D)

—
iP
TOOL NUMBER
& DESCRIPTION PRIORITY ILLUSTRATION

49 U034 2A0
Replacer rubber bush (4WS)
A
49 G034
1
AO
Coil spring
compressor
A

40—9