wiring MAZDA 626 1987 Workshop Manual
[x] Cancel search | Manufacturer: MAZDA, Model Year: 1987, Model line: 626, Model: MAZDA 626 1987Pages: 1865, PDF Size: 94.35 MB
Page 1739 of 1865
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
Page 1749 of 1865
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
Page 1751 of 1865
1 5 AUTO ADJUSTING SUSPENSION (AAS)
Condition Output pattern Malfunction Flow chart
No.
A
Set steering wheel
in
straight ahead position
0.5 sec
4.4V
n\/
2 sec
Vehicle speed sensor
or
wiring harness (Meter
—
Control unit)
AAS-1
Refer
to
page
15—98
A
Set steering wheel
in
straight ahead position
Vehicle speed sensor
or
wiring harness (Meter
—
Control unit)
AAS-1
Refer
to
page
15—98
A
Set steering wheel
in
straight ahead position
0.5 secO.!
4.4V
nv
i sec
2
sec
— <—i i— -
Steering wheel angle sen-
sor
or
wiring harness (An-
gle sensor
—
Control unit)
AAS-2
Refer
to
page
15-98
A
Set steering wheel
in
straight ahead position
-
Steering wheel angle sen-
sor
or
wiring harness (An-
gle sensor
—
Control unit)
AAS-2
Refer
to
page
15-98
A
Set steering wheel
in
straight ahead position
nv
Normal operation or wiring
harness (Fuse box
—
Con-
trol unit, control unit
—
Body ground)
AAS-3
Refer
to
page
15-99
A
Set steering wheel
in
straight ahead position
Normal operation or wiring
harness (Fuse box
—
Con-
trol unit, control unit
—
Body ground)
AAS-3
Refer
to
page
15-99
B
Turn the steering wheel
right and left
0.5 sec
4.4V
n\/
2 sec
—
Vehicle speed sensor
or
wiring harness (Meter
—
Control unit)
AAS-1
Refer
to
page
15-98
B
Turn the steering wheel
right and left
Vehicle speed sensor
or
wiring harness (Meter
—
Control unit)
AAS-1
Refer
to
page
15-98
B
Turn the steering wheel
right and left
0.5 sec 0
4.4V""-
.5 se c 2 se
-
Normal operation
—
B
Turn the steering wheel
right and left Normal operation
—
B
Turn the steering wheel
right and left
ov
Wiring harness (Fuse box
— Control unit, Control unit
— Body ground) See page
AAS-4
Refer
to
page
15—99
B
Turn the steering wheel
right and left
Wiring harness (Fuse box
— Control unit, Control unit
— Body ground) See page
AAS-4
Refer
to
page
15—99
C
Change the switch from
NORMAL to SPORT
or
from SPORT
to
NORMAL
0.5 sec
4.4V-""
_
n
Normal operation
—
C
Change the switch from
NORMAL to SPORT
or
from SPORT
to
NORMAL
Normal operation
—
C
Change the switch from
NORMAL to SPORT
or
from SPORT
to
NORMAL
0.5 sec 0
4.4V
nv
.5 se c
—
2 se
C
i—1 i—i
Front actuators
or
wiring
harness (Control unit
—
Front right
or
left actuator
AAS-5
Refer
to
page
15-100
C
Change the switch from
NORMAL to SPORT
or
from SPORT
to
NORMAL
Front actuators
or
wiring
harness (Control unit
—
Front right
or
left actuator
AAS-5
Refer
to
page
15-100
C
Change the switch from
NORMAL to SPORT
or
from SPORT
to
NORMAL
0.5 sec 0
4.4V*-
n\/
.5 se c
— r— —
2 sec
—1
Rear actuators
or
wiring
harness (Control unit
—
Rear right
or
left actuator
AAS-6
Refer
to
page
15-101
C
Change the switch from
NORMAL to SPORT
or
from SPORT
to
NORMAL
Rear actuators
or
wiring
harness (Control unit
—
Rear right
or
left actuator
AAS-6
Refer
to
page
15-101
15-96
Page 1752 of 1865
AUTO ADJUSTING SUSPENSION (AAS) 1 5
C
(Cont'd)
Operate
the
vehicle
at
above
15 km/h (9.3
mph) on
a
chassis roller
OV-
4.4V
0V-
4.4V
OV-
OV
AAS switch
or
wiring har-
ness (Fuse box
—
Control
box and AAS switch, AAS
switch
—
Control box and
Body ground)
Normal operation
Speed sensor
or
Steering
wheel angle sensor
or
wir-
ing harness (Control unit
—
Meter, Control unit
—
An-
gle sensor)
Speed sensor
or
Wiring
harness (Control unit
—
Meter, Fuse box
—
Control
unit, Control unit
—
Body
ground)
76G15X-080
15-97
Page 1753 of 1865
1 5 AUTO ADJUSTING SUSPENSION
Inspection of circuit
OK
Check
for
continuity between
1U
(GR) terminal
of
the meter connector and
M
(GR) terminal
of
the control unit connector.
Repair the wiring harness (Control unit
to
Meter).
OK
Replace the control unit.
76G15X-081
AAS-2
Failure
of
steering wheel angle sensor
or wiring harness (Angle sensor
—
Control unit)
I
Disconnect the control unit connector, and check
the
resistance between the terminals with
an
ohmmeter
when steering wheel
in
straight ahead position.
Terminal Resistance
A(G)
-
D(GW) ADDrox.
25 kfi
A(G)
-
C(GY) Approx.
50 kfl
C(GY^
-
D(G\M ADorox.
25 kfi
OK
Replace the control unit.
76G15X-082
15-98
Page 1754 of 1865
AUTO ADJUSTING SUSPENSION
(AAS) 1 5
AAS-3
Normal operation
or
failure
of
the wir-ing harness (Fuse box
to
Control unit, Control unit
to
Body ground)
Check the voltage between each terminal
of
the con-trol unit connector and
a
body ground with ignition ON.
Terminal Voltage
G(B) OV
J(B) OV
K (BY) Approx.
12V
OK
Normal operation.
NG
Replace TURN 15A fuse
or
repair the wiring harness (Fuse box
to
Control unit, Control unit
to
Body ground.)
86U15X-161
AAS-4
Failure
of
wiring harnesses (Fuse
box
to Control unit, Control unit
to
Body
ground).
Check the voltage between each terminal
of
control unit connector and
a
body ground with ignition
ON.
Terminals Voltage
G (B) OV
J (B) OV
K (BY)
ADDTOX.
12V
OK
Replace the control unit.
NG
Replace TURN 15A fuse
or
repair the wiring harness-
es (Fuse box
to
Control unit, Control unit
to
Body
ground.)
86U15X-162
15-99
Page 1755 of 1865
1 5 AUTO ADJUSTING SUSPENSION (AAS)
AAS-5
Failure
of
the front actuators
or the
wiring harness (Control unit
to
Front-right
or
front-left actuator)
Check the voltage between each terminal
of
front-right and front-left connectors and
a
body ground with ignition ON.
Terminal Voltage
Left side D (BR) Approx.
12V
Right side D (BR) Approx.
12V
NG
Replace POWER WIND 30A fuse
in
fuse box
or
wir-ing harness (Fuse box
to
Actuators).
OK
Disconnect the front-left actuator connector
and
check the voltage between each terminal
of
the con-trol unit connector and
a
body ground with ignition ON.
Terminal Voltage
A (WR) Approx.
12V
B (WL) Approx.
12V
C (WY) Approx.
12V
NG
OK
Reconnect the front-left actuator connector.
Disconnect the front-right actuator connector and check the voltage between each terminal
of
the con-trol unit connector and
a
body ground with ignition ON.
Terminal Voltage
A WR) Aoorox.
12V
B (WL) ADDrox.
12V
C (WY) Approx.
12V
Check the voltage between each terminal
of the
front-right actuator connector and
a
body ground with ignition
ON.
Terminal Voltage
A (WR) Approx.
12V
B (WL) Approx.
12V
C (WY) Approx.
12V
NG
Replace front-right
ac-
tuator.
OK
Repair the wiring har-ness (Front-right actua-tor
to
Control unit).
NG
Check the voltage between each terminal
of
the
front-left actuator connector and
a
body ground with
ignition ON.
Terminal Voltage
A (WR) Approx.
12V
B (WL) Approx.
12V
C (WY)
|
Approx.
12V
OK
Replace the control unit.
NG OK
Replace front-left
ac-
tuator.
Repair wiring harness (Front-left actuator
to
Control unit).
86U15X-163
15-100
Page 1756 of 1865
AUTO ADJUSTING SUSPENSION (AAS) 1 5
AAS-6
Failure
of
the rear actuators
or
wiring harness (Control unit
to
rear-right
or
rear-left actuator)
vi i11 1vuuuyu tw/v^ii I^CI^I i id i i in I«I wi i
right and rear-left actuator connectors and
a
body ground with ignition ON.
Terminal Voltage
Left side D (BR) Approx.
12V
Right side D (BR) Approx.
12V
NG
Replace POWER WIND 30A fuse
in
fuse box
or
wir-ing harness (Fuse box
to
Actuators).
OK
Disconnect the rear-left actuator connector and check the voltage between each terminal
of
the control unit connector and
a
body ground with ignition ON.
Terminal Voltage
0 (YL) Approx.
12V
Q (YR) Approx.
12V
R (YG) Approx.
12V
NG
OK
Reconnect the rear-left actuator connector.
Disconnect the rear-right actuator connector and check the voltage between each terminal
of
the con-trol unit connector and
a
body ground with ignition ON.
Terminal
'
Voltage
0 (YL)
ADDrox 12V
Q (YR)
ADDrox. 12V
R (YG} Approx.
12V
NG
OK
Replace the control unit.
Check the voltage between each terminal
of
the rear right side actuator connector and
a
body ground with ignition ON.
Terminal Voltage
A (YR) Approx.
12V
B (YG) Approx.
12V
C (YL) Approx.
12V
NG
Replace rear-right ac-
tuator,
OK
Repair wiring harness (Rear-right actuator
to
Control unit).
Check the voltage between each terminal
of
the rear-left actuator connector and
a
body ground with igni-tion ON.
Terminal Voltaae
A (YR) Approx.
12V
B (YG) ADDrox.
12V
C (YL) Approx.
12V
NG
Replace rear-1 eft
ac-
tuator.
OK
Replace wiring harness (Rear-left actuator
to
Control unit).
86U15X-164
15—101
Page 1757 of 1865
1 5 AUTO ADJUSTING SUSPENSION
AAS-7
Failure
of
AAS switch
or
wiring har-ness (Fuse box
to
Control unit and AAS switch, AAS switch
to
Control unit and Body ground
Check the voltage between each terminal
of
AAS switch connector and
a
body ground with ignition ON.
Terminal Voltage
F (BY) 12V
H (B) OV
NG Replace METER
10 or
15A fuse
or
repair the wiring harness (Fuse box
to
AAS switch, AAS switch
to
Body ground).
OK
Check the operation
of
the AAS switch referring
to
page 15—104.
, OK
Check
for
continuity, between
D
(LY) terminal
of
con-
trol unit and
D
(LY) terminal
of
AAS switch.
OK
Replace the control unit.
A AS-8
Failure
of
speed sensor
or
steering wheel angles sensor
or
wiring harness (Control unit
to
Meter, Control unit
to
Angle sensor).
NG
Replace the AAS switch.
NG
Repair wiring harness.
Disconnect the control unit connector, and check the resistance between the terminals with steering wheel in straight ahead position with
an
ohmmeter.
Terminal Resistance
A(G)
-
D(GW) Approx.
25
k£2
' A(G}
-
C(GY) Approx.
50 kfl
C(GY)
-
D(GW) Approx.
25
kJ2
NG
Check the steering angle sensor referring
to
page 15—16
OK
Go
to
AAS-1 routine.
OK
Repair the wiring harness (control unit
to
Angle
sensor).
76G15X-083
15-102
Page 1758 of 1865
AUTO ADJUSTING SUSPENSION 1 5
AAS-9
Failure of speed sensor or wiring har-ness (Control unit to Meter, Fuse box to Control unit, Control unit to Body ground)
Replace METER 10 or 15A fuse or repair the wiring harness (Fuse box to Control unit, Control unit to Body ground).
Check the voltage between each terminal of control
unit connector and a body ground with ignition ON.
Terminal Voltage
G (B) OV
J (B) OV
K (BY) Approx. 12V
OK
Go to AAS-1 routine.
76G15X-084
15—103