1987 MAZDA 626 check oil

7B TROUBLESHOOTING (G4A-HL)
Quick Diagnosis Chart
The Quick Diagnosis Chart shows various problems and the relationship of various components that
might be the cause of the problem.
The following is an explanation of the symbols used in this chart.
1. Components indicated in the "Adjustment" column indicate that there is a possibility that the prob-
lem may be the result of an incorrect adjustment.
Check the adjustment of each component, and readjust if necessary.
2. The components indicated in the "Electrical System Inspection" column can be checked for mal-
function by the results of the checking procedure.
3. Components indicated in the "Stall Test" column can be checked for malfunction by the results
of the stall test.
4. Components indicated in the "Time Lag Test" column can be checked for malfunction by the results
of the time lag test.
5. Components indicated in the "Road Test" column can be checked for malfunction by the results
of the road test.
6. Components indicated in the "Oil Pressure Test" column can be checked for malfunction by the
results of the oil pressure test.
7. The checking, adjusting, repair or replacement procedures for each component is described in the
page(s) noted in the "Reference Page" column.
76G07B-041
Inspection point
Item
Adjustment
Electrical System Inspection
Electrical control system
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7B—42

7B TROUBLESHOOTING (G4A-HL)
STEP 1 (PRELIMINARY INSPECTION)
In this step, the fundamental points related to the automatic transaxle are checked. These points must
be kept in the correct condition at all times in order to assure proper operation of the automatic transaxle.
83U07B-025
1. Automatic Transaxle Fluid (ATF)
Check ATF level and condition. (Refer to page
7B-71)
76G07B-043
11
m
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m
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Button need not
^ be depressed
Button must be pressed
2. Selector Lever
Check selector lever position and adjust if neces-
sary. (Refer to page 7B—72)
76G07B-044
3. Oil Leakage
Check for oil leakage.
(1) Warm up the ATF.
(2) Apply the parking brake and block the wheels
to prevent the vehicle from rolling.
(3) Shift the selector lever to R range.
(4) Check if oil leaks from the following oil seals
or gaskets.
(5) If oil leaks, replace the oil seal or gasket.
76G07B-215
7B—44

TROUBLESHOOTING (G4A-HL) 7B
The following figure shows the locations where fluid leakage may possibly occur.
1. Oil pan
2. Control valve body cover
3. Oil pump
4. Inhibitor switch
5. Speedometer driven gear
6. Oil filler tube
7. Throttle cable
8. Governor cover
9. Bearing cover
10. Driveshaft
11. Square head plug
12. Transaxle case
13. Drain plug
14. Oil cooler return pipe
15. Oil cooler outlet pipe
16. Blind plugs
83U07B-028
4. Inhibitor Switch
Check the inhibitor switch for operation. (Refer to
page 7B—65)
76G07B-045
7B—45

TROUBLESHOOTING (G4A-HL) 7B
STEP 3 (STALL TEST)
This step is performed to determine if there is slippage of the friction elements or malfunction of the
hydraulic components.
Preparation
Check the following items prior to testing:
1. Engine coolant, engine oil and ATF levels.
2. Warm the engine thoroughly to raise the ATF temperature to operating level (50—80°C, 122—176°F).
3. Engage the parking brake and use wheel chocks at the front and rear wheels.
Pull the parking brake Water temperature
ATF
83U07B-038
7B—49

7B TROUBLESHOOTING (G4A-HL)
Line Pressure Test
Preparation
1. Connect the SST to the line pressure output point
(square head plug L).
2. Connect a tachometer to the engine.
3. Perform the preparation procedure shown in STEP
3 (STALL TEST).
STEP 6 (OIL PRESSURE TEST)
This step checks line, throttle, and governor pressures to check the operation of hydraulic compo-
nents and for oil leakage.
83U07B-047
Procedure
76G07B-062
1. Start the engine and check that the idle speed is 900 rpm.
2. Shift the selector lever to D range.
3. Read the line pressure at idle.
4. Depress the brake pedal firmly with the left foot and gradually depress the accelerator pedal with
the right foot.
5. Read the line pressure as soon as the engine speed becomes constant, then release the accelera-
tor pedal.
Caution
Steps 4 to 5 must be performed within 5 seconds.
5. Shift the selector lever to N range and run the engine at idle for at least one minute.
6. Read the line pressure at idle and engine stall speeds for each range in the same manner.
7B—58

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.

ON-VEHICLE MAINTENANCE 7B
ON-VEHICLE MAINTENANCE
AUTOMATIC TRANSAXLE FLUID (ATF)
Inspection for Fluid Leaks
Check for fluid leaks; the following figure shows the locations where fluid leakage may possibly occur.
1. Oil pan
2. Control valve body cover
3. Oil pump
4. Inhibitor switch
5. Speedometer driven gear
6. Pulse generator (G4A-EL)
7. Oil filler tube
8. Throttle cable
9. Bearing cover
76G07B-085
10. Driveshaft
11. Square head plug
12. Transaxle case
13. Drain plug
14. Oil cooler return pipe
15. Oil cooler outlet pipe
16. Fluid temperature switch (G4A-EL)
17. Blind plugs
18. Governor cover (G4A-HL)
Inspection of Level
1. Apply the parking brake and position wheel chocks
to prevent the car from rolling forward.
Note
Place the car on a flat, level surface.
2. Run the engine so that the automatic transaxle fluid
reaches specified temperature.
3. While the engine is idling, shift the select lever from
P to L or P to 1 and back again.
4. Let the engine idle.
5. Shift the select lever to P.
76G07B-086
7B—71

7B ON-VEHICLE MAINTENANCE
Installation
Install in the reverse order of removal referring to in-
stallation note.
Installation note
Control valve body
Install the control valve body.
Tightening torque: 11—15 N-m
(110—150 cm-kg, 95—130 in-lb)
86U07B-083
Note
a) To place the manual plate in the correct po-
sition of the manual valve, shift into "R" be-
fore installation.
b) Verify that the manual plate and manual
valve are assembled correctly by using a
mirror, then tighten the mounting bolts.
86U07B-084
w v
ATF level
After installation, add ATF, and with the engine idling,
check the fluid level and for leaks.
(Refer to page 7B—71)
76G07B-100
Throttle cable
Adjust the throttle cable with the oil pressure test.
86U07B-086
7B-78