1987 MAZDA 626 brake light

7B TROUBLESHOOTING (G4A-EL)

ON VEHICLE-
-f-
—OFF VEHICLE

\ Inspection point
and

\ reference page

Condition
•

Electronic control system Prelim-
inary
Hydraulic
control
system
Power train \ Inspection point
and

\ reference page

Condition
•
7B-66

m CO I m r--
7B-63

i
cn to I m
Section

4B

|

Section

4B

|

ID to i m
CO CO 1 CD
7B-68
|
en CO 1 IX)
to 1 00 r-.
cn CD 1 CO
7B-69
|

1 CD r--
i no
cn s-1 m
Section
4B

r*-cn
S-1 CD h-
"=1-
rJ CO
7 CD r-
(XI o
1 m
cn CM 1 CD
7B-107

|
CD
7 CD 7 m
I
7B-113
I
CO CM
7 CO r-.
m cn
7 CO r-.
cn
7 DO r-
CM CM
7 CO

|
7B-126

7 00 r-
CO 7 cn
1*-r*-
7 m r-
\ Inspection point
and

\ reference page

Condition
•
Brake

light
switch

|

Inhibitor

switch

|

Mode

switch

|

1
CO. •o o X
Idle

switch

Throttle

sensor

|

Water

temp,

switch

|
0 tn c 0) cn
s
ffi
Q tn 01 o Hi >
Pulse

generator

|

"a o c 0) a to CM
TJ O CL ID s CO C\l 3-4

solenoid

|

Lock-up
solenoid

I

ATF

level
and
condition

|

Selector

lever

m Xj CO CJ 03
1 sz
Idle
speed
and
Ignition
timing

Control

valves

Accumulators
Oil
pump
Hydraulic

circuit

Torque

converter

Forward

clutch
Coasting
clutch

Reverse

clutch
JT O
u TT ro 2-4

brake
band
and

servo
$ 2
B cn cii > £ "O C CO
o
XI y
o >. CO S cb a O
One-way

clutch

2

s CI Cn tz JC 5 0-
Planetary

gear

Differential

assembly
Accelerating

Vehicle does
not
move
in
D,
S,
L,
or R
range
O O O O O O O O O O 0

Accelerating

Vehicle moves
in N
range -0 0 -—

Accelerating
Excessive creep
-0 O O -—

Accelerating
No creep
at all
O o o o
o
G 0 O O

Shifting

|

No shift
O O o
o
0 O 0 0
o
o O

Shifting

|
Abnormal shift sequence
0 o O O 0
o
o 0 O o o 0 O

Shifting

|
Frequent shifting 0 o 0 0 o 0 O O 0

Shifting

|

Excessively high
or
low
shift point 0 o 0 O 0 0 o 0 O 0 0
Shifting

|

No lock-up
0 o 0 0 o 0 O O o O

Shifting

|

No kick-down o o o o

Slipping

Engine
run
away
or
slip when
starting vehicle 0 o 0 O o O

Slipping
Engine
run
away
or
slip when
up-
or
down-shifting o o o 0 o O 0 0 O
8 n cn 4S SI V)
Excessive
N to D or N to R

shift shock o O o o o O
8 n cn 4S SI V)
Excessive shift shock when
up-

shifting
or
downshifting o o o o 0 0 0 8 n cn 4S SI V) Excessive shift shock when
changing range 0 0 o 0 o

j
Noise

Transaxle noisy
in N or P

range o o 0 O

j
Noise

Transaxle noisy
in D, S, L,
or

R range o 0 0 O

I
Others

j

No engine braking o O o 0 o o

I
Others

j

No mode change o 0 o o o o o o o
O
o
0

I
Others

j
Transaxle overheats
o o
0 o 0 o 0

I
Others

j
Vehicle moves
in
"P",
or
park-ing gear
not

disengaged when
"P"
is
dis-
engaged
0 O

I
Others

j

Hold indicator flashes o
0
o
0
o
O
o — — —
I
Others

j

Engine will
not
start
o
o
O — — —
76G07B-014
7B—14

TROUBLESHOOTING (G4A-EL) 7B
79G07C-068

Drive at 50
km/h
(31
mph)
Kick-down
Stop
the
vehicle
79G07C-069
After-repair Procedure
1. Cancel the memory of malfunctions by disconnect-
ing the negative battery terminal for at least five sec-
onds, then reconnect it.
2. Remove the EC-AT tester if it is connected.
3. Drive the vehicle at 50 km/h (31 mph), then de-
press the accelerator pedal fully to activate kick-
down. Stop the vehicle gradually.
KICK goimsv
BRAKE LIGHTS*
CRUISE CONTROL
C V,. DEPRESS FULL*
Ox
azsa
ORUti rpn
"J
i"
•
rm uu

£ZL ofF

4. Reconnect the EC-AT tester to the 6-pin service
connector.
5. Ground the 1 -pin service connector with a jumper
wire.
6. Turn the ignition switch ON.
7. Check that no code numbers are displayed.
79G07C-070
Inspection Procedure
No. 06 code display (Vehicle speed sensor)
76G07B-017
7B-19

TROUBLESHOOTING (G4A-EL) 7B
Item Indication Condition Possible cause
BRAKE LIGHT SW ON Brake pedal depressed Brake light switch or
wiring BRAKE LIGHT SW
OFF Brake pedal released
Brake light switch or
wiring
WATER TEMP SW ON Coolant temperature 72°C (162°F) or above Water temp switch or wiring WATER TEMP SW
OFF Coolant temperature lower than 65°C (149°F)
Water temp switch or wiring
ATF TEMP SW ON ATF temperature 150°C (302°F) or above Fluid temperature switch or wiring ATF TEMP SW
OFF ATF temperature lower than 143°C (289°F)
Fluid temperature switch or wiring
CRUISE CONTROL SW Not used — —
Input (Digital display)
THROTTLE SENSOR
EC-AT control unit terminal voltage All the time Throttle sensor, idle switch or wirings
VEHICLE SPEED*
Vehicle speed calculated from speed sensor signal
All the time Vehicle speed sensor, speedometer cable, or wiring
DRUM SPEED* Drum speed All the time Pulse generator or wirings
Output (Light)
1-2 SOLENOID VALVE*
ON
Refer to page 7B—26 solenoid valve operation table
Control unit, 1-2 shift sol., or wiring 1-2 SOLENOID VALVE* OFF
Refer to page 7B—26 solenoid valve operation table
Control unit, 1-2 shift sol., or wiring
2-3 SOLENOID VALVE*
ON Refer to page 7B—26 solenoid valve operation table Control unit, 2-3 shift sol., or wiring 2-3 SOLENOID VALVE* OFF
Refer to page 7B—26 solenoid valve operation table Control unit, 2-3 shift sol., or wiring
3-4 SOLENOID VALVE*
ON
Refer to page 7B—26 solenoid valve operation table
Control unit, 3-4 shift sol., or wiring 3-4 SOLENOID VALVE* OFF
Refer to page 7B—26 solenoid valve operation table
Control unit, 3-4 shift sol., or wiring
LOCK-UP SOLE-NOID VALVE*
ON Lock-up condition Control unit, lock-up sol., or wiring LOCK-UP SOLE-NOID VALVE* OFF Non-lock-up condition
Control unit, lock-up sol., or wiring
HOLD INDICATOR ON Hold mode Control unit, Hold switch, or wiring HOLD INDICATOR OFF Other modes
Control unit, Hold switch, or wiring
MODE INDICATOR ON Power or economy mode Control unit, hold switch, mode switch, or wiring MODE INDICATOR
OFF Hold mode
Control unit, hold switch, mode switch, or wiring
NO LOAD SIGNAL Not used — —
76G07B-028
7B-25

7B ELECTRICAL SYSTEM COMPONENTS
76G07B-073
7B-66
3. Remove the screw and move the inhibitor switch
so that the small hole is aligned with the screw hole.
4. Set the alignment by inserting a 2.0 mm (0.079
in) diameter pin through the holes.
5. Loosely tighten the switch mounting bolts, remove
the pin, and reinstall the screw.
6. Tighten the switch mounting bolts to specification.
Tightening torque:
8—11 N-m (80—110 cm-kg, 69—95 in-lb)
7. Recheck the continuity of the individual terminals.
WATER TEMPERATURE SWITCH
Inspection
1. Remove the water temperature switch.
2. Place the switch in water with a thermometer and
heat up the water gradually.
3. Check the continuity of the terminals. If necessary
replace the switch.
Connection guide
Water temperature Continuity
Below 65°C (149°F) Yes
Above 72°C (162°F) \ No
FLUID TEMPERATURE SWITCH (G4A-EL)
Inspection
1. Remove the fluid temperature switch.
2. Place the switch in oil with a thermometer as shown
and heat it up gradually.
3. Check the continuity of the terminals. If necessary
replace the switch.
Connection guide
Fluid temperature Continuity
Above 150°C (302°F) Yes
Below 143°C (289°F) No
BRAKE LIGHT SWITCH (G4A-EL)
Inspection of Terminal Voltage
1. Turn the ignition switch ON.
2. Check the voltage between terminal (WG) and
ground while depressing the brake pedal.
Terminal voltage I Brake pedal
Approx. 12V Depressed
Below 1,5V Released
3. If not correct, check continuity of the switch.

ELECTRICAL SYSTEM COMPONENTS 7B
Inspection of Continuity
1. Disconnect the brake light switch connector.
2. Check for continuity between the terminals while
depressing the brake pedal.
79G07C-114
76G07B-076
KICK-DOWN SWITCH (G4A-HL)
Inspection of Terminal Voltage
1. Turn the ignition switch ON.
2. Check the voltage at terminal (V) with a voltmeter.
Depressing stroke Terminal voltage
7/8-8/8 (Full) Approx. 12V
0-7/8 Below 1,5V
3. If not correct, check the wiring harness, switch, or
adjust the switch position.
Inspection of Continuty
1. Disconnect the kick-down switch connector.
2. Check for continuity of the switch with an
ohmmeter.
Switch Continuity
Pushed Yes
Released No
3. If not correct, replace the kick-down switch.
76G07B-077
Adjustment
1. Loosen the kick-down switch locknuts.
2. Depress the accelerator pedal fully.
3. Turn the switch until the threaded case touches the
stopper.
4. Turn the switch counterclockwise by one half revo-
lution.
5. Secure the switch with the locknut.
76G07B-078
7B—67

7B ELECTRICAL SYSTEM COMPONENTS
Terminal Connected to Voltage Condition
1J — — —
1K — — —
1L (Input) Idle switch Below 1.5V At idle 1L (Input) Idle switch Approx. 12V Other speeds
1M — — —
1N (Input) Brake light switch Approx. 12V Brake pedal depressed 1N (Input) Brake light switch Below 1.5V Brake pedal released
10 (Input) Throttle sensor
Approx. 5V Ignition switch ON 10 (Input) Throttle sensor Below 1,5V Ignition switch OFF
1P (Input)
Throttle sensor
Approx. 0.5—4.3V Throttle valve fully closed to fully open
1Q (Input) Vehicle speed sensor
Approx. 4.5V During driving
1Q (Input) Vehicle speed sensor Approx. 4.5V or below 1.5V Vehicle stopped
1R (Ground) Throttle sensor Below 1,5V —
1S (Input) Pulse generator Approx. 12V Engine running 1S (Input) Pulse generator Below 1,5V Engine stopped
1S (Ground) Pluse generator Below 1.5V —
2A (Battery power) Battery Approx. 12V Ignition switch ON 2A (Battery power) Battery Below 1,5V Ignition switch OFF
2B (Ground) Body ground Below 1,5V —
2C (Memory power) Battery Approx. 12V —
2D (Ground) Body ground Below 1,5V —
2E (Output) 1-2 shift solenoid valve Approx. 12V
Refer to page 7B—26 of solenoid valve
operation table
2E (Output) 1-2 shift solenoid valve Below 1.5V Refer to page 7B—26 of solenoid valve
operation table
2F (Output) 2-3 shift solenoid valve Approx. 12V
Refer to page 7B—26 of solenoid valve
operation table
2F (Output) 2-3 shift solenoid valve Below 1,5V
Refer to page 7B—26 of solenoid valve
operation table
2G — — —
2H (Output) 3-4 shift solenoid valve Approx. 12V Refer to page 7B—26 of solenoid valve operation table 2H (Output) 3-4 shift solenoid valve Below 1.5V
Refer to page 7B—26 of solenoid valve operation table
21 — — —
2J (Output) Lock-up solenoid valve Approx. 12V Lock-up 2J (Output) Lock-up solenoid valve Below 1,5V Other
2K (Output) Hold indicator Below 1,5V Hold mode 2K (Output) Hold indicator Approx. 12V Other modes
2L (Output) Mode indicator Approx. 12V Hold mode 2L (Output) Mode indicator Below 1,5V Power or economy mode
2M (Output) EC-AT Tester
(malfunction code)
Approx. 12V Normal
2M (Output) EC-AT Tester
(malfunction code) Below 1,5V If malfunction present 2M (Output) EC-AT Tester
(malfunction code) Code signal Self-diagnosis check connector grounded
2N — — —
20 (Input) Fluid temperature switch Below 1,5V Above 150°C (302°F) 20 (Input) Fluid temperature switch Approx. 10—12V Below 143°C (289°F)
2P (Input) EC-AT check connect Approx. 12V —
76G07B-084
7B-70

7B DISASSEMBLY
1. Remove the bolts; then remove the transaxle case
by tapping lightly with a plastic hammer.
86U07B-153
3. Remove the low and reverse brake piston
(1) Install the SST.
(2) Compress the spring and retainer assembly.
86U07B-154
(3) Remove the snap ring with snap ring pliers;
then remove the spring and retainer assembly.
86U07B-155
7B—100

1 0 TROUBLESHOOTING GUIDE
POWER STEERING
Problem Possible cause Remedy Page
Hard steering
Loose
or
damaged belt Low fluid level,
or air in
fluid Leakage
of
fluid
Malfunctioning electrical system* Insufficient oil pump pressure Improperly adjusted wheel alignment Malfunctioning steering gear Linkage ball joint not operating smoothly
Adjust
or
replace Add fluid
or
bleed
air
Repair
or
replace Repair
or
replace Repair
or
replace Refer
to
Section
13
Repair
or
replace Replace
10—12 10-11 10-13 10-87 10-16
10—28,
37
10-18

Poor return
Insufficient tire pressure
Improperly adjusted wheel alignment
Ball-joint not operating smoothly
Steering shaft contacting something
Refer
to
Section
12

Refer
to
Section
13

Replace
Repair
10-20 10-21

Excessive play
Loose gear box housing mounting bolts Worn linkage
or
tie-rod ball joint Worn lower ball joint Worn
or
damaged steering joint Worn rack and pinion gear
Tighten Replace
Refer
to
Section
13

Replace
Replace
10—30
10—18
10—21
10-58,
75
Steering wheel
vibrates

Insufficient tire pressure Damaged
or
unbalanced wheel Improperly adjusted wheel alignment Loose gear box housing mounting bolts Incorrect pinion preload adjustment Worn ball joints
Loose shock absorber mounting Malfunctioning shock absorber
Refer
to
Section
12

Refer
to
Section
13

Refer
to
Section
13

Tighten Adjust
Replace Refer
to
Section
13
Refer
to
Section
13

10-30 10-72,
81
10—18

Steering wheel
pulls

Unevenly worn tires
Incorrect tire pressure
Dragging brake
Improperly adjusted wheel alignment
Refer
to
Section
12

Refer
to
Section
12

Refer
to
Section
11

Refer
to
Section
13 —
Excessively light
steering at high
speed*

Malfunctioning electrical system Repair
or
replace 10-87
*... Only
for
electronically
-
controlled type

76G10X-002
10—8