door lock MAZDA 626 1987 User Guide

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

15 POWER WINDOW

OK Check power window switch
on
each door. Refer
to
page 15—67.

76G15X-059
INSPECTION
Power Window Driver's Side Switch
(For Sedan and Hatchback)
Check for continuity between terminals of the switch.
Main switch

—Terminal Position -——___ h i
Lock
Unlock
O o
O O:
Indicates continuity

76G15X-016
c f i i 0
b e h k n
a d R J m /
O O:
Indicates continuity

15-66

POWER DOOR LOCK 1 5
POWER DOOR LOCK
STRUCTURAL VIEW
CIRCUIT DIAGRAM

BATTERY

86U15X-171
15—105

1 5 POWER DOOR LOCK
TROUBLESHOOTING

Terminal Voltage
WG 12V
B OV
Check the voltage
at GB
terminal
of
the power door lock relay with each switch condition.
Terminal Condition Voltage
GB Lock 12V GB Unlock OV

OK

Check the voltage
at R
and
G
terminal
of
the power door lock relay with each switch condition.
Terminal Condition Voltaae
R Lock OV R Unlock 12V
G Lock 12V G Unlock OV

Power door lock does not operate.

Check DOOR LOCK 30A fuse.

OK
NG
Short circuit.
Check the voltage
at
each terminal
of
the power door lock relay connector.

NG
Repair the harness. (Fuse box
to
relay, Relay
to
ground)

OK

Check the power door lock switch. Refer
to
page 15-107.

OK
NG
Replace the switch.

NG
Repair the harness. (Door lock switch
to
relay)

NG
Replace the door lock relay.

OK

Check the power door lock motor. Refer
to
page
15-107.

OK

Repair the harness. (Relay
to
each motors)

NG
Replace the door lock motor.

76G15X086
15—106

POWER DOOR LOCK 1 5
86U15X-173
INSPECTION
Power Door Lock Switch
1. Check for continuity of the switch with an
ohmmeter.

WG GB B
Lock
o O

Unlock
o O

O
O:
indicates continuity

2. If continuity is not as specified, replace the switch.
Power Door Lock Motor
1. Check operation of the door lock actuator when
the battery voltage is applied to the terminal.

Connecting
to
Door lock motor 12V ground Door lock motor
G R LOCK (Pull)
R G UNLOCK (Release)

2. If not, replace the door lock motor.
86U15X-174
15—107