1987 MAZDA 626 Workshop Manual

1 5 CRUISE CONTROL SYSTEM
CRUISE CONTROL SYSTEM
STRUCTURAL VIEW
86U15X-146
1. Main switch
2. Control switch
3. Control unit
4. Stop switch
5. Clutch switch (MTX)
6. Actuator
7. Inhibitor switch (ATX)
15-82

CRUISE CONTROL SYSTEM 1 5
CIRCUIT DIAGRAM

BATTERY

0
t
© o-
MAIN FUSE
X-05

—13 |F|-«-X-01
8QA X-01
X-02^ 15A JB-07 ® (1 OA) @
BW |D)
^-O
METER

From Combination Light Sw (Section Eb>
J*
TRB
[l|
MAIN SW

CLUTCH
SW

-BY ID]—
I iB-28 L-u^p——.L-1
~
—
LO,DI--JLO!D1
Lr
For West Germany
STOP SW
L-02nr iL-02

From Stop Light
.
checker (Section F)
GW
[I]

-BY [D] To Stop Light Checker GY.IDI
From Stop
Light Sw WG (Dj—
(Section F)
' '

L-01 Cruise Control Unit
|

B
L LW LO G GW
±±±LA±± TT
EC-Al
WG
MI LR
L-04 Cruise Control Sw [D]
L
LW
GR GY
GB
B
LR

L-05 Main Sw
[I]
riu^rii
^TTT1 GY BY B GW

L-02 Slop Sw
[
' (LV)

B-26 Clutch Sw (D]
LO
BY
m
RG LgB

L-03 Actuator
I
* GY G
r±±i
X GW GB
86U15X-147
15-83

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

CRUISE CONTROL SYSTEM 1 5
B.Check Switch
The check switch in the ACC checker is used to
check the actuator operation while the engine is
running. When the check switch is held on after
the engine is started, the engine speed increases
to approximately 2,000 to 3,000 rpm and is main-
tained at that level. When the check switch is
released, the engine speed decreases to idle
speed.
76G15X-073
C.Slide switch
Before using the check switch, first move the slide
switch to the "L" position.
Then use the check switch to increase the engine
rpm.
If the engine rpm stabilizes after increasing to
2,000—3,000 rpm, there is no problem. If there is
no increase at all, or only a slight increase, try again
after setting the slide switch to the "H" position.
If there is still no increase to 2,000—3,000 rpm,
adjust the free play of the actuator inner cable.
76U15X-319
76G15X-074
Preparation
1. ACC checker installation
Depress the lock hook of the harness connector.
Remove the connector from the ACC control unit
after the ignition switch and main switch are turned
off, and then connect the harness connector to the
ACC checker.
2. Checking the free play of the actuator inner
cable
Remove the clip and adjust the nut so that the ac-
tuator control cable play is as follows when the ca-
ble is pressed lightly.
Standard play: 1—3 mm (0.039—0.118 in)
15—85

1
5
CRUISE CONTROL SYSTEM
Checking
the
System
Check table O:
Represents: Light ON
X: Represents: Light OFF

CHECK LIGHTS (correct response)
ACTUATOR 5
CHECK ITEMS AND CONDITIONS

MAIN
SW

VAC
i
VENT2 VANT1
i
'
CLUTCH/BRAKE
SW

CONBINATION/INH

S

'
GENERATOR

TROUBLESHOOTING (INCORRECT RESPONSE)

1. MAIN SW. CONTINUITY:
• Ignition switch
ON
• Main switch
ON O O O o
X
A/T
O
M/T X

O
or X
ALL LIGHTS OFF: Check ignition switch, main switch, fuse, and associated harness termi-nals and connectors
2. INHIBITOR SW. CONTINUITY:
• Ignition and main switch ON. • Shift lever
to "D"
(A/T)
• Depress brake pedal

o o o o
X X
0
or X
COMBINATION/INH. SW. LIGHT ON:
Check inhibitor switch and associated
harness.
3. BRAKE SW. CONTINUITY: • Ignition and main switch
ON

• Shift lever
to
"D"
(A/T)
• Depress brake pedal

o o o o 0
X
o
or X
CLUTCH/BRAKE SW.LIGHT OFF:
Check brake switch and associated
harness.
4. CLUTCH SW. CONTINUITY:
• Ignition switch
ON
• Main switch
ON
• Depress clutch pedal

o o o 0 o
X
O
or X
CLUTCH/BRAKE SW. LIGHT OFF: Check clutch switch and associated harness.
5. "SET" POSITION
OF
COMBINA-TION SWITCH:
• Ignition switch
ON

• Main switch
ON
• Shift lever
to "D"
(A/T) • Push
to
"SET" position
of
com-bination switch

o o o o
X
o
O
or X
COMBINATION/INH.
SW.
LIGHT OFF: Check "SET" position of combination switch and associated harness.
6. "COAST" POSITION
OF
COMBI-NATION SWITCH • Ignition switch
ON

• Main switch
ON
• Shift lever
to "D"
(A/T) • Turn
to
"COAST" position
of
combination switch

o o o o
X
o
O
or X
COMBINATION/INH.
SW.
LIGHT OFF: Check "COAST" position in combina-tion switch and associated harness.
7. "RESUME" POSITION OF COMBI-NATION SWITCH
• Ignition switch
ON
• Main switch
ON
• Shift lever
to "D"
(A/T)
• Turn
to
"RESUME" position
of
combination switch

o o o o
X
o O
or X
COMBINATION/INH.
SW.
LIGHT OFF: Check "RESUME" position of combi-nation switch and associated harness.

76U15X-198
15—86

CRUISE CONTROL SYSTEM 1 5
CHECK LIGHTS (correct response)
ACTUATOR £
5 (O
W X
CHECK ITEMS AND CONDITIONS £ <0 z
VAC
CM I-1-z
Ul * < IE ffl X o V-
z o F < z ta
DC O 1-< DC Ui
TROUBLESHOOTING
(INCORRECT RESPONSE)
< S VAC UJ > < > -1 o o o UJ O
8. START THE ENGINE
• Shift lever to "N" position (A/T) O O O o X
A/T
O M/T X
O or X —
9. ACTUATOR OPERATION: (EGI model only) • After engine is started, set the slide switch "L" or "H". Then turn on check switch (keep in "D" position) Note: Engine speed should in-crease to 2,000—3,000 rpm. If over 4,000 rpm release the switch immediately.
o
X
1
o
X X X
A/T O M/T X
O or X
If engine speed does not come up to and remain
in
the
2,000
to
3,000
rpm. range, check the actuator and as-sociated harness.
10. SPEED SENSOR OUTPUT
Keeping idling condition, drive ve-
hicle slowly. o o 0 o X X 0 1 X
If GENERATOR LIGHT does not flash, trouble may be with speed sensor and associated harness.
76U15X-199
INSPECTION
Actuator
Measure the actuator solenoid resistance by using
an ohmmeter.
Check terminals Resistance
c-d
Approx. 25 to 35 ohms c — a Approx. 25 to 35 ohms
c — b
Approx. 25 to 35 ohms
76G15X-075
Cruise Control Unit
If there is an operation malfunction of the cruise con-
trol system, and no abnormal condition when check-
ing above, replace the cruise control unit and check
system operation.
Clutch Switch, Brake Switch
When removing these switches, turn each of them
so that the corresponding pedal height agrees with
the standard value.
76G15X-076
Brake pedal height: 222 ±1 mm (8.74 1820
Clutch pedal height:
216.5 ±8 mm (8.52 ±820 In)
in)
15-87

1 5 CRUISE CONTROL SYSTEM
Speed sensor
1. Remove the combination meter.
2. Connect an ohmmeter between "u" and "n" ter-
minals of the 22 pin connector.
3. Confirm continuity between terminals when rotat-
ing the speedometer cable shaft.
4. If not 4 times per rotation, replace the speedometer.
Inhibitor switch
Refer to Section 7B.
76G15X-077
—88