1987 MAZDA 626 wiring

METER 15
86U15X-033
86U15X-034
104.1t! 21
2330 16.10
a £] U \JEMP j n
JJ
86U15X-035

Standard indication
(km/h)
Allowable range
(km/h)
60 60-63
Standard indication
(mph)
Allowable range
(mph)
60 60-63

86U15X-036
3. Set the SST to the resistance values shown in the
figure.
4. Turn the ignition switch ON, and check that the
needle indicator displays the correct values.
If the needle displays correctly, check the gauge
unit. If not, replace the fuel gauge in the meter or
repair the wiring harness.
Caution
a) Continue the above checks for at least two
minutes each to correctly judge the con-
dition.
b)The allowable indication error is twice the
width of the needle.
Water Temperature Gauge
1. Disconnect the connector from the water thermo
sensor.
2. Connect the red lead of the SST to the connec-
tor, and the black lead to a body ground.
3. Set the SST to the resistance values shown in the
figure.
4. Turn the ignition switch ON, and check that the
needle indicator displays the correct values.
If the needle displays the correct values, the trou-
ble is in the gauge unit; if not, the trouble is in the
meter or the wiring harness.
Caution
a) Continue the above checks for at least two
minutes each to correctly judge the con-
dition.
b)The allowable indication error is twice the
width of the needle.
INSPECTION OF DIGITAL METER
Speedometer
1. Using a speedometer tester, check the speedom-
eter for allowable indication error, and check the
operation of the odometer. Replace the meter as-
sembly if necessary.
2. Check the speedometer for fluctuation and/or ab-
normal noise.
Caution
a) If significant fluctuation occurs or the
speedometer does not move at all, remove
the speedometer cable. If normal, replace
the digital meter assembly.
b)Tire wear and improper inflation will in-
crease speedometer error.
15—27

METER 15
Water Temperature Gauge
1. Remove the connector from the water thermo
sensor.
2. Connect the red lead of the SST to the connec-
tor, and the black lead to a body ground.
86U15X-041
C -&TEMP H
r
•
|
7 •
V i y
86U15X-042
3. Set the SST to the resistance values shown in the
following table.
4. Turn the ignition switch ON and check that the seg-
ment displays the correct values. If the segment
displays the correct values, check the gauge unit.
If not, replace the digital meter assembly or repair
wiring harness.
Caution
Continue the above checks for at least two
minutes each to correctly judge the condition.

Segment Resistance
(Q)
Segment Resistance
(Q)
1-10
less than
17
1-5
33-89

1-
9
17—20
1-4
89-120

1—
8
20—26
1-3
120-145

1—
7
26-28
1-2
145-177

1-
6
28-33
1
more than
177
INSPECTION OF METER SENDER
Fuel tank unit (except 4WS model)
1. Disconnect the connector from the fuel tank unit.
2. Remove the fuel tank unit from the tank.
3. Connect an ohmmeter to terminal "b" of con-
nector.
4. Move the unit arm slowly from point (F) to point
(E), and read the resistance values. If not as speci-
fied, replace the unit.
86U15X-043
15—29

1 5 TURN AND HAZARD LIGHT
TROUBLESHOOTING
Note
Check the TURN 15A fuse in the fuse box before troubleshooting.

Terminal Voltage
H (BG) 12V

OK

Check the voltage between each terminal
of
flasher unit connector and
a
body ground with each con-dition.
Terminal Condition Voltage
A(B) Any time OV
E (BR) Turn switch
is
Riaht 12V
F (GY) Turn switch
is
left 12V
H (Br) Anv time 12V

OK
Turn function does not operate.

Check the flasher unit. Refer
to
page 15—47

OK

Check the turn signal switch. Refer
to
page 15—14

OK
NG
NG

Check the voltage
at H
(BG) terminal
of
the combina-tion switch (Turn).
Replace the unit.
Replace the switch.

NG
Repair harness. (Fuse box
to
combination switch)
Repair harness.

NG

Terminal Wiring harness
A (B) Flasher unit
to
ground
E (BR) Flasher unit
to
combination switch
F (GY) Flasher unit
to
combination switch
H (Bri Fuse box
to
Flasher unit
Check the lights and wiring harness (Each bulb
to a

body ground)

NG
Replace the lights
or
repair the wiring harness.

OK

Repair harness. (Flasher unit
to
each bulb)
76G15X-045
Hazard function does not operate. (Turn func-tion is normal)

Check the hazard switch. Refer
to
page 15—19,
20
OK
NG
Replace the switch.
Check the voltage
at
each terminal
of
the hazard
switch connector.
Terminal Voltage
B (GR) 12V
D (B) OV

15-46
NG
Repair the wiring harness. (Flasher unit
to
hazard
switch, hazard switch
to
ground)

OK

Check the flasher unit. Refer
to
page 15—47
NG
Replace the unit.

76G15X-046

TURN AND HAZARD LIGHT 1 5
Rapid flashing

Check the lights and wiring harness between each
bulb and
a
body ground (rapid flashing side).

86U15X-081
76G15X-047
INSPECTION
Hazard and Flasher Unit
For LHD
1. Check for continuity between terminals of the haz-
ard and flasher unit.

Terminal Continuity Terminal Continuity Terminal Continuity
a-c X d-e X f-g X
a-d X d-f X f-h X
a-e O d-g X g-a X
a-f O d-h X g-c X
a-g X e-a X g-d X
a-h X e-c X g-e X
c-a
o
e-d X 9-f X
c-d
o
e-f X g-h X
c-e
o
e-g X h-a
O

c-f
o
e-h X h-c
o

c-g
o
f-a X h-d
o

c-h
o
f-c X h-e
o

d-a X f-d X h-f
o

d-c X f-e X h-g
o

O: Indicates continuity
X: No
continuity

Note
Set the tester to X1000Q range.
2. If continuity is not as specified, replace the switch.
For RHD
1. Apply 12V to the "B" terminal of the unit and con-
nect "E" terminal to the ground.
2. Confirm that the two paralleled lamps come on
when connected between the "L" terminal and the
ground.
Caution
Do no reverse the polarity of the electrical
source to the terminals.
76G15X048
15—47

1 5 STOP LIGHT
Both side stop lights do not illuminate when brake on.

Check the voltage
at A
(GW) terminal
of
stop light switch connector.
NG

Terminal Voltage
A (GW) 12V
Repair harness. (Fuse box
to
stop light switch)

OK

Check the stop light switch. Refer
to
page 15—51
NG
Replace the switch.

OK

Check the voltage between each terminal
of
the stop and tail light checker connector and
a
body ground when brake
on.

Terminal Voltage
B(B) OV
C (WG) 12V
NG Repair the wiring harness. (Stop light switch
to
stop and tail light checker, stop and tail light checker
to
body ground)

OK
OK

Repair the wiring harness. (Stop and tail light checker to bulb, bulb
to
body ground)

76G15X-049
Light Checker
1. Check for continuity between terminals of the stop
and tail light checker.
Stop and tail light checker (except West
Germany)
3 c £
r -r •
I i f 1 3
76G15X050

Terminal Continuity Terminal Continuity Terminal Continuity
i + i -
Continuity
+
1
-
Continuity
i + i -
Continuity
a-b
O
c-d
X
f-a
X

a-c
O
c-f
o
f-h
0

a-d
X c-g X g-a o

a-f
o
c-h
o
g-b
o

a-a
X
d-a
o a-c o

a-h
o
d-b
o
g-d
X

b-a
o
d-c
0
a-f
o

b-c
o
d-f
o
g-h
o

b-d
X
d-g
X
h-a
o

b-f
o
d-h
o
h-b
o

b-g
X
f-a
0
h-c
o

b-h
o
f-b
o
h-d
X

c-a
0
f-c
o
h-f
o

c-b
o
f-d
X
h-a
X

O: Indicates continuity
X: No
continuity

15-50

1 5 PANEL LIGHT CONTROL
PANEL LIGHT CONTROL
CIRCUIT DIAGRAM
COMBINATION SW (Light Sw)
1 ? 3= o
5
B
*
SB c
52 "
o
-too u c E o E H Eil'y E 1 a tcsfi
86U15X-098
TROUBLESHOOTING
OK

Repair the wiring harness. (Fuse box
to
panel light controller, Panel light controller
to
body ground)

76G15X-056
15—56

Check the voltage between each terminal
of
the pan-el light controller connector and
a
body ground.
Terminal Voltage
B (RB) 12V
C(B) OV

1 5 CRUISE CONTROL SYSTEM
ON-VEHICLE INSPECTION (USING ACC CHECKER 49 9200 010)
76G15X-072
Note:
When checking the actuator on '88 models with EC-AT using this checker, the checker
should be modified as shown below in order to avoid damage of the EC-AT control unit.
Modification Procedure
1. Cut the wire at terminal no.6 indicated on ACC
checker connector.
2. Tape exposed end of wire cut in step 1 as shown.
This modification does not affect the usage of the ACC
checker except when used on the '81 RX-7 and 626
models. When the modified ACC checker is used on
these models, use a jumper wire and jump across
terminal no.6 to 3 indicated on ACC checker connec-
tor as shown.
Function of the ACC CHECKER
A. Check lights
Each item is verified by a check light, as described below.
Check light Check items
MAIN SW.
Ignition switch, fuse, main switch and associated wiring harness terminals and con-
nectors.

ACTUATOR—VAC
VAC coil continuity
in
the actuator and associated harness.

ACTUATOR—VENT 2
VENT
2
coil continuity
in
the actuator and associated harness.

ACTUATOR—VENT 1
VENT
1
coil continuity
in
the actuator and associated harness.

CLUTCH/BRAKE SW.
Clutch switch (M/T vehicles only), brake switch and associated harness

COMBINATION/INH. SW.
"SET", "COAST" and "RESUME" positions
in
the combination switch, inhibitor
switch (A/T vehicles only), and associated harness.

GENERATOR
Speed sensor output and associated harness.

76U15X-193
15-84

1 5 AUTO ADJUSTING SUSPENSION (AAS)
AUTO ADJUSTING SUSPENSION (AAS)
CIRCUIT DIAGRAM
Combination switch iq Speed sensor
M
Panel light
control
AAS control unit
Steering angle sensor
H
N
Check connector
IG IG
Actuator (RR)
-P-Sl
-t-^J
—Pwsl
Actuator (RL)
Actuator (FR) P5fl
+
Actuator (FL)
QO M K GIE C A
ft N J HI F D B
86U15X-151
TROUBLESHOOTING GUIDE
The AAS control unit has a self-diagnosis function detecting the unit itself, electrical parts for AAS sys-
tem, and wiring harness open circuit, to inform mechanics. If it detects their malfunctions, outputs the
output pattern to A (LW) terminal of service connector according to the settled pattern for each mal-
function.
Troubleshooting against AAS system can be conducted by knowing the output pattern (See page 15—96,
97) to detect trouble location. 76gisx-o2o
TROUBLESHOOTING
How To Use Self-Diagnosis System
By using the control unit's self-diagnosis function and
a voltmeter, malfunctions of the system are easily de-
termined. When diagnosing malfunctions, follow the
steps bellow.
1. Connect a voltmeter to A (LW) terminal of the serv-
ice connector in engine room.
2. Read out the output patterns (See page 15—96)
in following condition.
76G15X-079
15—94