1987 MAZDA 626 ECO mode

TROUBLESHOOTING (G4A-EL) 7B
Economy
4.3 (8/8)
3.8-(11/8)
3.4-I .^(6/8)
& c 2.9 5 8.(5/8) - °
S 5 2.4H 1 -i (4/8) « >
0) 1.0-(1/8)
05 A
(0/8)
0
i
Lock-up OFF
40 (25) 60 (37) 80 (50) 100 (63) 120 (74) 140 (87) 160 (99)
Vehicle speed km/h (mph)
6. Select D range (Hold mode).
7. Accelerate the vehicle and check 2-3 up- and down-shifts, no 1st, and no OD is obtained and that
the 2-3 shift points are as shown in the D range (Hold) shift diagram.
79G07C-094
7B—35

7B TROUBLESHOOTING (G4A-EL)
Evaluation
Condition Possible Cause
No 1-2 up- or down-shift Stuck 1-2 shift solenoid valve
Stuck
1
-2 shift valve
No 2-3 up- or down-shift Stuck 2-3 shift solenoid valve Stuck 2-3 shift valve
No 3-OD up- or down-shift Stuck 3-4 shift solenoid valve Stuck 3-4 shift valve
No lock-up shift Stuck lock-up control solenoid valve Stuck lock-up control valve
Incorrect shift point Mis-adjusted throttle sensor Sticking shift valves
Excessive shift shock or slippage
Excessive shift shock Stuck accumulators Stuck or no one-way check orifice
Worn clutches, brakes, or one-way clutch
No engine braking effect Worn clutches or brakes
76G07B-035
Noise and vibration
Drive the vehicle in OD (lock-up), OD (no lock-up), 3rd (Hold) and check for abnormal noise or vibration.
Note
Abnormal noise and vibration can also be caused by the torque converter, drive shaft, or
differential. Therefore, checking of cause must be made with extreme care.
Kick-down
Drive the vehicle in OD, 3rd and 2nd gears and check that kick-down occurs for OD->3, OD->2, OD->1,
3->2, 3-+1, 2-> 1, and the shift points are as shown in the shift diagram.
S Range Test
Shift pattern
1. Shift the selector lever to S range and select the Economy mode.
2. Accelerate the vehicle and check that 1-2 and 2-3 up-shifts and down-shifts are obtained, and that
no overdrive and no lock-up are obtained.
Note
a) Inspections of shift shock and shift point are not necessary because these are the same
as those of the D Range Test.
b)ln S range, the shift patterns for Economy and Power modes are the same.
c) Shift points are the same as those of the D range (Power) shift diagram.
3. While driving in S range (Economy mode) and 3rd gear, select the Hold mode and check that 3rd
gear is held until the 3-2 down-shift point as shown in the S range (Hold) shift diagram is achieved.
4. Accelerate the vehicle with S range (Hold mode) and check that 2nd gear is held.
7B i—36

TROUBLESHOOTING (G4A-EL) 7B
76G07B-036
Noise and vibration
Drive the vehicle in 2nd gear (Hold mode) and check for abnormal noise or vibration.
Note
Abnormal noise and vibration can also be caused by the torque converter, drive shaft or
differential. Therefore, checking of cause must be made with extreme care.
L Range Test
Shift pattern
1. Shift the selector lever to L range and select the mode.
2. Accelerate the vehicle and check that the 1-2 up- and down-shiftings are obtained and that no 3rd
gear, no OD, and no lock-up are obtained.
Note
Inspection of shift shock and shift point are not necessary because these are the same
as those of the D Range Test.
3. Drive in 1st gear then decelerate and check that engine braking effect is felt.
Note
a) In L range, the shift patterns for Economy and Power modes are the same.
b) Shift points are the same as those of the D range (Power) shift diagram.
4. While driving in S range (Hold mode) and 2nd gear, shift the selector lever to L range and check
that 2nd gear is held until the 2-1 down-shift point as shown in the L range (Hold) shift diagram
is achieved.
5. Accelerate the vehicle in L range (Hold mode) and check that 1st gear is held.
7B—37

7B TROUBLESHOOTING (G4A-EL)
Slippage Test
This step is performed to inspect slippage of the friction elements.
Preparation 1. Perform the preparation procedure shown in STEP 4 (STALL TEST). 2. Connect a tachometer to the engine and set it in the cabin.
3. Connect the EC-AT Tester and the adaptor harness between the EC-AT control unit and wiring
harness.
Procedure
Drive the vehicle in each of the gears indicated below and check whether the vehicle speed or engine
speed is above or below specification excessively as shown by the drum speed.
Driving condition
Speed
Drum speed (rpm)
No. Gears Other condition Speed
1,000 2,000 3,000 4,000
1 1st L range, Hold mode 11 (7) 22 (14) 33 (20) 44 (27)
2 1st D range, Economy mode 11 (7) 22 (14) 33 (20) 44 (27)
3 2nd S range, Hold mode Vehicle speed km/h (mph) 20 (12) 40 (25) 60 (37) 80 (50)
4 3rd D range, Hold mode 31 (19) 61 (38) 92 (57) 123 (76)
5 OD D range, Economy
mode 44 (27) 88 (55) 131 (81) 173 (107)
6 OD D range, Economy mode, Lock-up Engine speed (rpm) 1,000 2,000 3,000 4,000
76G07B-038
Evaluation
When there is no malfunction in the electrical system or hydraulic system, but vehicle speed or engine
speed is below specification, the problem can be attributed to slippage of the friction elements.
Driving conditions below specification Possible Cause
No.1 condition only Low and reverse brake
No.2 condition only One-way clutch
No.3 condition only 2-4 brake band
No.4 condition only Coasting clutch
No.5 condition only 3-4 clutch
No.1-No,5 conditions Forward clutch
No.6 condition only Lock-up piston (in torque converter)
76G07B-039
7B—40

ELECTRICAL SYSTEM COMPONENTS 7B
Economy position
Power position • POWER
•ECONO
76G07B-066
86U07B-049
86U07B-050

ELECTRICAL
SYSTEM COMPONENTS
MODE SWITCH (G4A-EL)
Inspection of Operation
1. Turn the ignition switch ON.
2. Check that the mode indicator illuminates at each
model.
3. If it is not working properly, check terminal voltage
of mode switch.
Inspection of Continuity
1. Disconnect the mode switch.
2. Turn the ignition switch ON and light switch OFF.
3. Check the voltage between each terminal and
ground.
Mode Voltage Mode a b d e f
Power Approx. 12V
Below 1.5 V Below 1.5 V Below 1.5 V Below 1.5 V
Economy Below
1.5 V
Below
1.5 V Below 1.5 V
Below
1.5 V
Approx.
12V
4.
If
correct, check for continuty between the terminal.
Inspection of Terminal Voltage
1. Disconnect the mode switch connector.
2. Check continuity of the terminals.
Mode
Economy
Power
Connector terminal
O
O
f
o
-o
o
o
-o
-o
O—O: Indicates continuity
3. If not correct, replace the mode switch.
HOLD SWITCH (G4A-EL)
Inspection of Operation
1. Turn the ignition switch ON.
2. Check that the hold indicator illuminates while
switch depressed. Release the switch and mode
indicator lights are out.
3. If it is not working properly, check terminal voltage
of hold switch.
76G07B-067
7B—63

ELECTRICAL SYSTEM COMPONENTS 7B
76G07B-083
EC-AT CONTROL UNIT (G4A-EL)
SOLENOID VALVES (G4A-EL)
Inspection of Resistance
1. Disconnect the negative battery cable.
2. Disconnect the solenoid valve connector.
3. Measure the resistance of the terminals except (A)
terminal, if necessary replace the solenoid valve.
Resistance: 13—271]
Note
1-2 solenoid valve : F
2-3 solenoid valve : C,E
3-4 solenoid valve : B
Lock-up solenoid valve : D
NO LOAD SIGNAL (G4A-EL)
Refer to STEP 3 in Troubleshooting.
MODE, AND HOLD INDICATOR LIGHT (G4A-EL)
Refer to Section 15.
OD OFF INDICATOR LIGHT (G4A-HL)
Refer to Section 15.
/ 1S 10 10 1M X 1G 1E 1C

1A
1T 1R 1P 1N 1L 1J 1H 1F 1D 1B
/—
20 2M 2K X 2E 2C 2A
2P 2N 2L 2J 2H 2F 2D 2B
Terminal Voltage Chart
Terminal Connected to Voltage Condition
1A (Input) Hold switch Approx. 12V Switch depressed 1A (Input) Hold switch Below 1.5 V Switch released
1B (Input) Mode switch (Power side) Below 1.5V POWER mode 1B (Input) Mode switch (Power side) Approx. 12V ECONOMY mode
1C (Input)
Inhibitor
switch
L range Approx. 12V L range 1C (Input)
Inhibitor
switch
L range Below 1.5V Other ranges
1D (Input) Inhibitor
switch
S range Approx. 12 V S range 1D (Input) Inhibitor
switch
S range Below 1,5V Other ranges
1E (Input)
Inhibitor
switch D range Approx. 12V D range 1E (Input)
Inhibitor
switch D range Below 1.5 V Other ranges
1F (Input)
Inhibitor
switch
N and P range
Below 1,5V N or P range 1F (Input)
Inhibitor
switch
N and P range Approx. 12V Other ranges
1G (Input) Water temperature switch Approx. 12V Above 72°C (162°F) 1G (Input) Water temperature switch Below 1,5V Below 65°C (149°F)
1H — —
11 — —
7B-69

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

7C OUTLINE
OUTLINE
SPECIFICATIONS
Model F3A Model FE engine F6 engine
Torque converter stall torque ratio 1.800-2.100 : 1
Gear ratio
First 2.841
Gear ratio Second 1.541 Gear ratio
Third 1.000
Gear ratio
Reverse 2.400
Final gear ratio 3.450 : 1 3.631 : 1
Number of drive plates/ driven plates
Front clutch 3/3
Number of drive plates/ driven plates Rear clutch 4/4 Number of drive plates/ driven plates
Low and reverse brake 4/4
Servo diameter (Piston outer dia./retainer inner dia.) mm (in) 64/36 (2.52/1.42) 64/44 (2.52/1.73)
Speedometer gear ratio (Driven/Drive gear) 0.80 (20/25) 0.84 (21/25)
Automatic transaxle fluid
Type Dexron-II or M-III
Automatic transaxle fluid Capacity liters
(US qt, Imp qt) 6.2 (6.6, 5.5)
76G07C-002
7C—2