1987 MAZDA 626 ignition

5
IGNITION
SWITCH
76G15X-026
B IG1
ST ST •S
Key reminder switch
~
Key reminder switch
ON
Lock
ACC
ACC
69G15X-014
REPLACEMENT
Disconnect the negative battery terminal. 30, 40 and
60A fuses: pull out and push in a new fuse.
80A fuse:
1. Remove the main fuse box.
2. Open the cover.
3. Remove the terminal.
4. Pull out and push in a new fuse.
IGNITION SWITCH
INSPECTION
1. Use an ohmmeter to check continuity of the termi-
nals of the switch.
2. If continuity is not as specified, replace the switch.
-^Terminal
Position"""-""---^^ B ACC IG2 IGi ST c d
LOCK Remove LOCK Insert 0--0
ACC O--0 O--0
ON O--O o--O o--o
ST r -O O--o ST -O O--o
): Indicates continuity
15—10

CLUSTER SWITCH 15
e a
frtum
Illumination light
b
f
e -Q-
f d b d I f
Indicator light
76G15X-088
86U15X-018
g
TTTT
h f d b
from f „
IG SW
from a def. relay^
from ~ TWS unit
15 minules timer
To ground
h To panel
"controller
INSPECTION OF ROCKER TYPE
Hazard switch
1. Check for continuity between the terminals in each
position with an ohmmeter.

——____Terminal Position
^
a
b d
e
f

OFF
ON
-o

O
O:
Indicates continuity

2. If continuity is not as specified, replace the switch
or replace the light(s).
Defroster switch
1. Turn the ignition switch ON.
2. Push the defroster switch to ON, and check the
lights for lighting.
3. If the lights do not light, replace the lights.
4. Check that the switch goes off after 15 min from
switch ON.
5. Check the voltage between each terminal and a
body ground.

Position Terminal voltage
(V)
Position
b d f g h
OFF 0 12 12 0 12
ON 0 0 12 0 12
ON
(head light switch
ON) 0 0 12 2-12 12

OFF (head light switch
ON) 0 12 12 2-12 12
6. If the voltage of "d" terminal is 12V with switch off
but not OV with switch on, replace the defroster
switch.
If the voltage of "d" terminal is not 12V with switch
off, trouble is in defroster relay or harness.
If the voltages of the other terminals are not cor-
rect, trouble is in the other parts or harness.
86U15X-019
15—19

15 CLUSTER SWITCH
86U15X-020
86U15X-021
A itt
TTTT h f
from f IG SW
from 9
def. relay
•>o-15 min. timer _To ground
86U15X-022
INSPECTION OF FOUR SWITCH TYPE
Hazard switch
1. Check for continuity between terminals of the
switch.

Position a b
C
d
OFF O— —0
ON
pi Pi Pl
ON
u
O O:
Indicates continuity

2. If continuity is not as specified, replace the switch.
Defroster switch
1. Turn the ignition switch ON.
2. Check the light for lighting.
3. If the light doesn't light, replace the light.
4. Check that the switch goes off after 15 min from
switch on.
5. Check the voltage between each terminal and a
body ground.

Position Terminal voltage
(V)
Position
f g h

OFF
12 12 0

ON
12 0 0
6. If the voltage of terminal "g" is 12V with switch off
but not OV with switch on, replace the defroster
switch
If the voltage of terminal "g" is not 12V with switch
off, trouble is in defroster relay or harness.
If the voltage of terminal "f" and "h" is not cor-
rect, the trouble is in the other parts or harness.
Rear wiper and washer switch
1. Check for continuity between the terminals in each
position with an ohmmeter.

1———___Terminal Position
"——
a b d f h
Rear wiper switch OFF CK -0
—O Rear wiper switch ON
o--0
O-—O
Rear washer switch OFF Rear washer switch ON
o-
-O O-
—o
86U15X-023
O O:
Indicates continuity

2. If continuity is not as specified, replace the switch.
15—20

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

15 METER

Standard Indication

(rpm)

Allowable range

(rpm)
1000
900—
950

2000 1900-1950
3000 2900—2950
4000 3900-3950
5000 4900—4950
6000 5900-5950

86U15X-037
86U15X-038
86U15X-039
Standard display Expanded display
E ©FUEL F E © FUEL F
"io — •
QJ1QOOODDOOOD
Tachometer
1. Connect a test tachometer to the engine, and start
the engine.
2. Check the tachometer for the allowable indicator
error. Replace digital meter assembly.
Caution
When removing or installing the tachometer,
be careful not to drop it or subject it to sharp
impact.
Fuel Gauge
1. Disconnect the connector from the fuel tank unit.
2. Connect the red lead of the SST to terminal "Y"
and the black lead to body ground.
86U15X-040
Set the SST to the resistance values shown the fol-
lowing table.
Turn the ignition switch ON and check that the seg-
ment displays the correct values in each range.
If the segment displays the correct values, check
the gauge unit. If not, replace the digital meter as-
sembly.
Caution
Continue the above inspections for at least
two minutes each to correctly judge the con-
dition.

Segment Standard display Expanded display Segment Resistance
(Q)
1-10
less than
8
less than
63

1-
9
8-14
63-66

1-
8
14—20 66-70

1-
7
20-25 70-74

1-
6
25-30 74-78

1-
5
30—37 78-82

1-
4
37-46 82-86

1—
3
46-63 86-90

1-
2
63-86 90-93

1
86-98 93-98

1
(flashing) more than
98
less than
98
15-28

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 WARNING AND SENDER
Shift Indicator Light
All shift indicator lights do not Illuminate when ignition switch on. (other warning light are all right.)

Check the voltage
at BY
terminal
of
the inhibitor switch connector with ignition switch
on.

Terminal Voltage
BY 12V

NG
Repair the harness (Fuse box
to
inhibitor switch).

OK

Check the inhibitor switch. Refer
to
page 7B—65
NG
Replace the inhibitor switch. Check the inhibitor switch. Refer
to
page 7B—65 Replace the inhibitor switch.

OK
NG
Check the bulbs
of
the shift indicator lights.
NG
Replace the bulb.

OK

Turn the ignition switch on, and check the voltage
at
each terminal
of
the meter connector with each con-dition.
Terminal Selector lever Voltage
YL (2J) P 12V
RG (1L) R 12V
YR (2L) N 12V
Y(1V) D 12V
YB (1S) 2 12V
YW (1M) 1 12V

NG
Repair the harness (Inhibitor switch
to
meter).

76G15X-087
O/D OFF Indicator Light
OK

Repair the harness (O/D OFF switch
to
ground).

76G15X092
15-38

CENTRAL PROCESSING UNIT (CPU) 1 5
REMOVAL AND INSTALLATION
1. Disconnect the negative battery cable.
2. Disconnect the CPU connectors.
3. Release the lock and remove the CPU from the
joint box.
4. Install in the reverse order of removal.
ON-VEHICLE INSPECTION
Note: Check the voltage between "a through
I" terminal and ground.
Check the continuity between "m,
n" terminal and ground.
86U15X-075

Terminal Connecting
to
Measurement condition Measurement value
a Interior light and courtesy lights Any time Approx.
12V

b Batterv Anv time Approx.
12V

c No used
— —

d Ground Anv time OV
e Seat belt warning light Ignition switch
ON
Approx.
12V

f Enaine control unit Enaine runnina Approx.
12V

g Key cylinder illumination light Any time Approx.
12V

i Key reminder switch Insert the key into the cylinder
Pull out the key from the cylinder
Approx.
12V

OV
j Ignition switch (ON) Ignition switch
ON

Ignition switch OFF
or
ACC
Approx.
12V

OV
k Ignition switch (ACC) Ignition switch
ON or
ACC
Ignition switch OFF
Approx.
12V

OV
I Light switch (In the combination switch) Turn the light switch ACC and
ON

Light switch OFF
Approx.
12V

OV
m Seat belt switch Seat belt fastened
Seat belt unfastered

OQ

OO
n Door switch Door closed
Door open
OO
on

76G15X-009
15—43