1987 MAZDA 626 warning

ALTERNATOR 5
TROUBLESHOOTING
Preliminary Check
1. Turn the ignition switch ON, and check that
the alternator warning light illuminates.
2. Start the engine, and check that the alternator warning light goes off.
76G05X-024
1. Alternator warning light always not illuminate
76G05X-025
2. Alternator warning light illuminates when engine running
76G05X-026
5-23

5 ALTERNATOR
3. Alternator warning light operates properly, but battery discharged
OK
NG OK
1
a) Poor connection between B terminal and positive battery cable
b) Poor connection of negative battery cable c) Poor connection between alternator connector (2-pin) and positive battery terminal d) Stator coil or diodes malfunction (Refer to page 5—32 or 5—34.)
Perform TEST 2. (Refer to page 5--25.)
NG
Perform TEST 3. (Refer to Dage 5--26.)
I OK
Perfrom TEST 4. (Refer to page 5--26.)
NG
Perform TEST 5 (F Refer to page 5—26)
OK
Alternator normal.
Check other electrical components.
NG
Alternator normal.
Check other electrical components.
Perform TEST 5. (Refer to page 5—26.)
OK
Stator coil, diode, main fuse, or wiring har-ness between B ternimal and battery mal-function.
(Refer to page 5—32 or 5—34.)
IC regulator, bush, or rotor coil malfunction. (Refer to page 5—32 or 5—33)
NG
76G05X-027
4. Battery overcharged
Less than 14.1V
(At 20°C, 68°F)
More than 14.7V
(At 20oC,68°F)
IC regulator malfunction,
Perform TES T 6. (Refer to page 5—27.)
NG OK
Wiring harness malfunction.
76G05X-028
5—24

ALTERNATOR 5
Warning
Disconnect the nagative battery terminal when disconnect or reconnect B terminal.
TEST 1
1. Disconnect the alternator connector (2-pin).
2. Connect the SST.
4. Connect the red clip of the adapter harness to the battery
(
+
),
and check that the red
lamp and green lamp illuminate.
5. Start the engine and check that both lamps go off.
86U05X-010
TEST 2
1. Connect an ammeter (75A min.) between the wire and the B terminal.
2. Turn all headlights and accessories on, and depress the brake pedal.
3. Start the engine and check that output current is 70A (RF-CX: 75A) or more at
2,500—3,000 rpm of the engine speed.
Caution
Do not ground the B terminal.
76G05X-029
B terminal
5-25

7B
AUTOMATIC TRANSAXLE
(Electronically Controlled and 4-Speed)
OUTLINE 7B— 2
SPECIFICATIONS 7B— 2
COMPONENT LOCATION 7B— 3
STRUCTURAL VIEW 7B— 5
OPERATION OF COMPONENTS 7B— 6
FLUID PASSAGE LOCATION 7B— 9
TROUBLESHOOTING (G4A-EL) 7B— 12
GENERAL NOTE 7B— 12
STEP 1
(WARNING CODE RETRIEVAL) 7B— 15
STEP 2
(PRELIMINARY INSPECTION) 7B— 22
STEP 3 (SIGNAL INSPECTION) 7B— 24
STEP 4 (STALL TEST) 7B— 27
STEP 5 (TIME LAG TEST) 7B— 30
STEP 6 (OIL PRESSURE TEST) 7B— 31
STEP 7 (ROAD TEST) 7B— 34
TROUBLESHOOTING (G4A-HL) 7B— 41
GENERAL NOTE 7B— 41
STEP 1
(PRELIMINARY INSPECTION) 7B— 44
STEP 2 (ELECTRICAL
SYSTEM INSPECTION) 7B— 47
STEP 3 (STALL TEST) 7B— 49
STEP 4 (TIME LAG TEST) 7B- 52
STEP 5 (ROAD TEST) 7B— 53
STEP 6 (OIL PRESSURE TEST) 7B— 58
ELECTRICAL SYSTEM
COMPONENTS 7B— 63
MODE SWITCH (G4A-EL) 7B— 63
HOLD SWITCH (G4A-EL) 7B— 63
OD OFF SWITCH (G4A-HL) 7B— 64
INHIBITOR SWITCH 7B- 65
WATER TEMPERATURE SWITCH 7B— 66
FLUID TEMPERATURE SWITCH
(G4A-EL) 7B— 66
BRAKE LIGHT SWITCH
(G4A-EL) 7B— 66
KICK-DOWN SWITCH (G4A-HL) 7B— 67
PULSE GENERATOR (G4A-EL) 7B- 68
VEHICLE SPEED SENSOR
(G4A-EL) 7B— 68
CRUISE CONTROL SWITCH
(CRUISE CONTROL UNIT) 7B— 68
IDLE SWITCH AND THROTTLE
SENSOR (G4A-EL) 7B— 68
OD RELEASE SOLENOID
VALVE (G4A-HL) 7B— 68
SOLENOID VALVES (G4A-EL) 7B— 69
NO LOAD SIGNAL (G4A-EL) 7B— 69
MODE, AND HOLD INDICATOR
LIGHT (G4A-EL) 7B— 69
OD OFF INDICATOR LIGHT
(G4A-HL) 7B— 69
EC-AT CONTROL UNIT
(G4A-EL) 7B— 69
ON-VEHICLE MAINTENANCE 7B— 71
AUTOMATIC TRANSAXLE
FLUID (ATF) 7B— 71
SELECTOR LEVER 7B— 72
THROTTLE CABLE 7B— 73
CONTROL VALVE BODY 7B— 77
OIL STRAINER 7B— 79
ADJUSTMENT OF 2-4 BRAKE
BAND 78— 80
REPLACEMENT OF
DRIVESHAFT OIL SEAL 7B— 80
OIL COOLER 7B— 81
GOVERNOR (G4A-HL) 7B— 82
REMOVAL 7B— 83
PRECAUTION 7B— 83
DISASSEMBLY 7B— 88
DISASSEMBLY-STEP 1 7B— 88
DISASSEMBLY-STEP 2 7B— 94
DISASSEMBLY-STEP 3 7B— 99
DISASSEMBLY-STEP 4 7B—103
INSPECTION AND REPAIR 7B—107
PRECAUTION 7B—107
TORQUE CONVERTER 7B—107
OIL PUMP 7B—108
CLUTCH ASSEMBLY 7B—113
SMALL SUN GEAR AND
ONE-WAY CLUTCH 7B—122
ONE-WAY CLUTCH AND
CARRIER HUB ASSEMBLY 7B-126
3-4 CLUTCH 7B—128
2-3 ACCUMULATOR 7B—132
GOVERNOR ASSEMBLY
(G4A-HL) 7B-133
LOW AND REVERSE BRAKE 7B—134
2-4 BRAKE BAND 7B—135
BAND SERVO 7B—135
OTHER INSPECTION 7B—135
CONTROL VALVE BODY
(G4A-EL) 7B-136
CONTROL VALVE BODY
(G4A-HL) 7B-155
DIFFERENTIAL 7B—177
OUTPUT GEAR 7B—181
IDLE GEAR 7B—182
BEARING COVER ASSEMBLY 7B—185
BEARING HOUSING 7B—186
ASSEMBLY 7B-187
PRECATION 7B—187
ASSEMBLY-STEP 1 7B—187
ASSEMBLY-STEP 2 7B—197
ASSEMBLY-STEP 3 7B—202
ASSEMBLY-STEP 4 7B—208
INSTALLATION 7B—215
TORQUE SPECIFICATIONS 7B—215
HYDRAULIC CIRCUIT (G4A-EL) 7B—221
HYDRAULIC CIRCUIT (G4A-HL) 7B—239
76G07B-001

TROUBLESHOOTING (G4A-EL) 7B
STEP 1 (WARNING CODE RETRIEVAL)
Self-diagnosis Function
The self-diagnosis system, which is integrated in the EC-AT control unit, diagnoses malfunction of the
main sensors (input) and solenoid valves (output), and the EC-AT control unit.
Malfunctions which have happened or are continuing are memorized in the EC-AT control unit as specific
codes.
The EC-AT Tester is used to retrieve these warning codes. Each malfunction is indicated by a code
number and buzzer as shown the table below.
Code Number
Code number Location of malfunction Buzzer
06 Vehicle speed sensor or circuit JliUli c
12 Throttle sensor or circuit rui r
55 Pulse genelator or circuit nnnnruiii r
60 1-2 shift solenoid valve or circuit jinnnnn r
61 2-3 shift solenoid valve or circuit nnnnnruL_[
62 3-4 shift solenoid valve or circuit nnnnnn nn r
63 Lock-up solenoid valve or circuit
_ 1 0,4 sec
rnnnnn ihi J r1.2sec J | _1.fi sec
76G07B-213
EC-AT Tester
Assembly of EC-AT tester
1. Set the plate (49 G019 912) onto the EC-AT tester
body (49 G019 901 A).
2. Connect the adapter harness (49 G019 911) to
the EC-AT tester body.
3. Select the code select switch to A position.
4. Select the select switch to NEW 626 position.
76G07B-603
7B—15

TROUBLESHOOTING (G4A-EL) 7B
06 4 second period
55 4 second period
63
-*•
4 second period
Repeats above
General Note
1. If there is more than one malfunction, the code
numbers will be displayed on the tester one by one
in a numerical order. In the case of malfunctions,
55, 06, and 63, the code numbers are displayed
in an order of 06, 55, then 63. The display is as
shown.
86U07B-018
When the service connector
is not grounded
Malfunctions YES
NO
Hold indicator YES
flashing NQ
YES
NO
Memory in control unit
2. The hold indicator flashes to indicate the same pat-
tern as the buzzer of the EC-AT Tester when the
EC-AT service connector is grounded.
When the EC-AT service connector is not ground-
ed, the indicator flashes in a constant frequency
while a malfunction is occurring and goes out
if
the
malfunction recovers. However, the warning code
is memorized in the EC-AT control unit.
76G07B-015
Sensors-
Solenoid-valve
Fail-safe program Proces--\Out sing -v puts
The EC-AT control unit has a built-in fail-safe func-
tion for the throttle sensor, the pulse generator, and
the 1-2, 2-3, and 3-4 shift solenoid valves.
If a malfunction occurs, the EC-AT control unit will
control operation of the remaining components ac-
cording to a preset fail-safe program.
The vehicle may still be driven, although the driv-
ing performance will be slightly affected.
79G07C-062
4. The memory of warning codes is canceled by dis-
connecting the negative battery terminal for ap-
prox. five seconds.
79G07C-063
7B-17

7B DISASSEMBLY
4. Assemble the SST.
86U07B-121
5. Lift the transaxle and mount it on the SST.
86U07B-122
Note
Attach the suitable hanger to the oil pump as
shown.
86U07B-123
Warning
Avoid leaning the transaxle to one side dur-
ing disassembly, it may turn quickly and cause
injury.
76U07B-453
7B-90

DISASSEMBLY 7C
5. Assembly the SST.
76G07C-076
76G07C-350
6. Attach the hanger to the oil pump as shown.
7. Lift the transaxle and mount it on the SST.
Warning
Avoid leaning the transaxle to one side dur-
ing disassembly, it may turn quickly and cause
injury.
Note
If troubleshooting indicates that there is a
problem on the differential side, separate the
transaxle case assembly from the converter
housing and cover it.
63U07B-064
8. Remove the inhibitor switch.
76G07C-077
7C—37