battery MAZDA 626 1987 Workshop Manual

ANTI-LOCK BRAKE SYSTEM (ABS) 1 1
ABS-9
Possible failure
Relay box, Hydraulic unit, Harness
Disconnect Q-01 (17-pin) connector. Disconnect battery. Turn ignition switch
ON.
Check continuity
at
harness side.
Q-01 (17-pin) Continuity
RY (B) BG (G) No

NG
OK

Check that resistance between
LO
(C)
of
harness side
and
ground changes when reversing
© and
© test-leads.
NG

Check relay box. (Refer
to
page 11—87.)

OK

Repair harness.
(Control unit—Relay box-Hydraulic unit)

NG
Replace relay box.

OK

Check continuity
at
harness side.
Q-01 (17-pin) Continuity
RY (B) Ground Yes

OK

Relay control unit.

NG
Disconnect Q-09 connector. Check continuity
at
motor side.
Q-09 Continuity
RY Ground Yes

NG
Repair harness. (Motor—Ground)

OK

Check continuity
at
motor side.
Q-09 Continuity
RY B Yes

NG
Replace hydraulic unit.

OK

Repair harness. (Control unit—Relay box-Hydraulic unit)

76G11X-056
11-81

1 1 ANTI-LOCK BRAKE SYSTEM (ABS)
86U11X-154
ABS-11
Possible failure
Relay box, Hydraulic unit, Harness
Disconnect Q-01 (17-pin) connector. Disconnect battery. Check continuity
at
harness side.
Q-01 (17-pin) Continuity
LO(C) BG (G) No

OK

Q-01 (17-pin) Resistance
BL (E) Ground Aoorox. 7512

OK

Replace control unit.
Check resistance
at
harness side.

NG
Check relay box. (Refer
to
page 11—87.)

OK

Repair harness. (Control unit—Relay box-Hydraulic unit)

NG

Q-08 Continuitv
BL Ground No

OK

Repair harness. (Control unit—Relay box-Hydraulic unit)

NG
Replace relay box.
Disconnect Q-08 connector. Check continuity
at
relay side.
NG
76G11X-057
86U11X-156
11-82

ANTI-LOCK BRAKE SYSTEM (ABS) 1 1
ABS-13
Possible failure
Relay box, Hydraulic unit, Harness
Check Q-10, Q-06, and Q-08 con-
nectors
for
proper connection.

OK

Q-01 (17-pin) Resistance
BL (E) BG (G) approx. 75
Q
OK

Q-01 (17-pin) Resistance
LO (C) © probe YG(J) © probe approx.
65 Q

Q-08 (6-pin) Q-08 (2-Din) Continuity
BG LR Yes

OK

Disconnect Q-09 and Q-08 (2-pin) connectors. Check continuity
at
harness side.
Q-09 Q-08 (2-pin) Continuity
RY RY Yes
Q-09 Continuity
RY I Ground No
Q-09 Resistance
RY B approx. 0.1
Si
NG

Disconnect Q-01 (17-pin) connector. Disconnect battery. Measure resistance at harness side.
NG

Check resistance between BL (C)
and
YG
(J)
of
harness side.

OK

Check continuity
at
hydraulic unit side.

NG
OK

Turn ignition switch ON.
Check continuity
at
harness side.
Repair connector.
Check relay box. (Refer
to
page 11 —87)

NG
Replace relay box.

OK

Repair harness.
(Control unit—Relay box
or
Ignition switch—Hydraulic unit)

NG
Repair harness. (Relay box—Battery)

NG
Repair harness. (Hydraulic unit—Relay box)

NG
OK

Replace hydraulic unit
Check relay box. (Refer
to
page 11—87.)

OK
Replace control unit.

NG

Replace relay box

76G11X-058
11-83

1 1 ANTI-LOCK BRAKE SYSTEM (ABS)
DIAGNOSIS INDICATION MODE
To obtain the diagnosis indication mode, proceed as
follows:
1. Remove the driver's seat.
2. Connect terminal wires (GB) and (B) of the check
connector (at control unit) with a jumper wire.
3. Start the engine.
Note
The system is now in the diagnosis indication
mode.
86U11X-162
4. Observe the warning light for illumination or count
flashing.
5. Connect an analog voltmeter to terminal wire (GR),
and count the times voltage is output.
Note
a) The voltmeter will fluctuate between OV and
approx. 12V.
b) Determine the failure and flow chart num-
ber with the Diagnosis Table. (Refer to page
11—75.)
76G11X-059
86U11X-164
86U11X-165
MEMORY CANCEL
Note
Failures are contained in the control unit mem-
ory. They are not erased when the battery is
disconnected. Follow the procedure below to
erase them.
1. Connect the terminal wires (GR) and (GB) of the
check connector with a jumper wire.
2. Turn the ignition switch ON.
3. Check that the warning light is illuminated, and wait
1—2 seconds.
4. Turn the ignition switch OFF.
5. Disconnect the jumper wire from terminal wire (GR).
6. Start the engine and wait for the warning light to
go OFF.
Note
a) One failure memory is erased each time the
above steps are taken.
b) If the warning light illuminates or blinks af-
ter step 6, read and note diagnosis indica-
tion. The memory has the capacity for
storing 32 failures.
7. Turn the ignition switch OFF.
8. Remove the jumper wire.
11-86

ANTI-LOCK BRAKE SYSTEM (ABS) 1 1
86U11X-190
86U11X-191
76G11X098
Inspection of Pressure Reduction
1. Check that the battery is fully charged.
2. Jack up the vehicle and support it with safety
stands.
3. Release the parking brake.
4. Check the wheel for brake drag while turning it by
hand.
5. Connect terminal wires (GB) and (B) of the check
connector with a jumper wire.
6. Have an assistant depress the brake pedal; then
verify that the wheel cannot be turned.
7. Run the engine for 10 sec, and stop it.
8. With the brake pedal depressed, turn the ignition
switch ON.
9. With the brake pedal still depressed, check that the
wheel can be turned intermittently (when pressure-
reduction is operating).
Right'F Left F Rear Pressure reduction
Ignition switch ON OFF
1 05 1 sec sec sec
J
10. Check operation at the remaining wheels.
11. If not operated correctly, check the warning light
and brake light switch circuit for proper operation.
Inspection of Proportioning Valve
Note
The proportioning valve is built into the hy-
draulic unit.
1. Disconnect the flexible hose from the brake pipe;
then connect one pressure gauge to the front brake
pipe, the other to the rear brake pipe.
Note
Use a pressure gauge [9,810 kPa (100 kg/cm2,
1,422 psi)].
86U11X-193
11—95

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

1 4 REAR HATCH
/ { / t
K'
86U14X-023
86U14X-024
86U14X-025
REMOVAL
1. Disconnect the negative battery cable.
2. Remove the rear hatch trim.
3. Disconnect the connector, then remove the car-
go room light.
4. Remove the rear hatch screen.
Caution
Remove the screen carefully so that it may be
reused.
5. Disconnect the rear defogger and wiper motor con-
nectors, then remove the wire harness through the
rear hatch.
6. Remove the wiper arm.
7. Remove the wiper motor.
86U14X-026
14—10

1 4 HEADLIGHT AND COMBINATION LIGHT
HEADLIGHT AND COMBINATION LIGHT
REMOVAL AND INSTALLATION
1. Disconnect the negative battery cable.
2. Remove in the sequence shown in the figure, referring to removal note for the specially marked parts.
3. Install in the reverse order of removal.
76G14X-005
1. Screw
2. Turn signal light assembly
3. Screw
4. Radiator grille
5. Bolts
6. Bolts
7. Headlight assembly
8. Screws
9. Light garnish
10. Headlight bulb
60 + 55W/55W
11. Parking light bulb 5W
12. Turn signal light bulb
21W
14—28

1 4 REAR COMBINATION LIGHTS
REAR COMBINATION LIGHTS
REMOVAL AND INSTALLATION
1. Disconnect the negative battery cable.
2. Remove in the sequence shown in the figure.
3. Install in the reverse order of removal.
76G14X-010
Hatchback
1. End trim
2. Nuts
3. Lens and body
4. Cover
5. Bulb: Turn signal light 21W
Brake and tail light 21W
Side marker light 5W
Sedan and Coupe/MX-6
1. End trim
2. Nuts
3. Lens and body
4. Cover
5. Bulb: Turn signal light 21W
Brake and tail light 21W
Side marker light 5W
14—32

LICENSE PLATE
LIGHT
AND CORGO ROOM LIGHT
1
4
LICENSE PLATE LIGHT AND CORGO ROOM LIGHT
REMOVAL AND INSTALLATION
1. Disconnect the negative battery cable.
2. Remove in the sequence shown in the figure.
3. Install in the reverse order of removal.
76G14X-011
Sedan and Coupe/MX-6
License plate light
1. Screws
2. Lens
3. Bulb 5W x 2
Back up light
4. End trim
5. Bulb 21W
6. Nuts
7. Rear finisher
Hatchback
Corgo room light
1. Lens
2. Switch and bulb assembly 5W
License plate light
3. Side trim
4. Lower trim
5. End trim
6. Screws
7. Lens
8. Bulb 5W x 2
9. Rear finisher
14-35