sensor MAZDA 626 1987 Workshop Manual

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 TROUBLESHOOTING (G4A-EL)
STEP 7 (ROAD TEST)
This step is performed to inspect for problems at the various ranges. If these tests show any problems,
adjust or replace by referring to the electronic system component or mechanical sections.
Caution
Perform the test at normal ATF operating temperature (50—80°C, 122—176°F).
D Range Test
Shift point, shift pattern, and shift shock
1. Shift the selector lever to D range and select the Power mode.
2. Accelerate the vehicle with half and full throttle valve opening.
Note
Throttle sensor voltage of the EC-AT Tester represents the throttle valve opening.
3. Check that 1-2, 2-3 and 3-OD up-shifts and downshifts and lock-up are obtained. The shift points
must be as shown in the D range (Power) shift diagram.
Note
a) Drum speed (rpm) of the EC-AT Tester represents the shift point.
b) Vehicle speed of the EC-AT Tester and speedometer and vehicle speed on a chassis
roller may not meet the specified shift pattern because of tire size. Therefore, check
the shift points with the Drum speed.
c) There is no lock-up when the coolant temperature is below 72°C (162°F).
d) There is no overdrive when the cruise control is operating and there is a 3 km/h (1.9
mph) difference between the pre-set cruise speed and vehicle speed, or set or resume
switch is ON.
e) There is no lock-up when the brake pedal is depressed.
4. Check the up-shifts for shift shock or slippage in the same manner.
5. While driving in OD, shift the selector lever to S range and check that 4-3 downshift immediately
occurs, then decelerate and check that engine braking effect is felt in only 3rd gear.
7B—34

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
Vehicle Speed at Gearshift Table
Mode Range Throttle condition (Throttle sensor voltage) Shifting Drum speed rpm Vehicle speed km/h (mph)
Di -» D2 4930-5480 54-60 (33-37)
Fully opened (4.3 volt) D2 D3 5120—5520 102-110 (63—68)
D3 - OD 5380-5710 165-175 (102—109)
Di -»• D2 3470-4180 38-45 (24-28)
D2 -» D3 4020—4420 80—88 (50—55)
D3 - OD 3820-4530 117-139 (73-86)
Half throttle (1.6—2.2 volt)
Lock-up
ON (OD) 2670-3170 117-139 (73-86)

Powe

Lock-up OFF (OD) 2510-2970 110—130 (68—81)
OD - D3 2150-2630 94-115 (58-71)
D3 ->• D2 2020-2410 62—74 (38—46)
OD - D3 3490—3720 153—163 (95-101)
OD - D2 2050-2240 90-98 (56-61)
Kick-down OD -> Di 980-1120 43-49 (27-30) Kick-down D3 -<• D2 2940-3200 90-98 (56-61)
D3 -»• Di 1400-1500 43—46 (27—29)
D D2 -> Di 2160-2300 43—46 (27-29) D Di -»• D2 4470-5020 49—55 (30-34)
Fully opened (4.3 volt) D2 - D3 4770—5170 95-103 (59-64)
D3 -» OD 5380-5710 165-175 (102-109)
Di -> D2 2830-3380 31-37 (19-23)
D2 D3 2960-3120 59-68 (37-42)
D3 - OD 2870-3460 88-106 (55—66)
>. E o c o o
Half throttle (1.6-2.2 volt)
Lock-up
ON (OD) 2010-2420 88-106 (55-66) >. E o c o o
Lock-up OFF (OD) 1940-2310 85-101 (53-63)
LU OD - D3 1600-1960 70-86 (43-53)
D3 -> D2 1240-1570 38-48 (24—30)
OD ->• D3 3490-3720 153-163 (95-101)
OD - D2 1960—2150 86-94 (53-58)
Kick-down OD - Di 980-1120 43-49 (27-30) Kick-down D3 -> D2 2800-3070 86-94 (53-58)
D3 -> Di 1400—1600 43—49 (27—30)
D2 Di 2160-2460 43—46 (27—30)
S1 - S2 4930-5480 54-60 (33-37)
Fully opened (4.3 volt)
S2 - S3 5120-5520 102—110 (63-68) Fully opened (4.3 volt) S4 -» S3 3720-3950 163—173 (101—107) Fully opened (4.3 volt) S3 - S2 2940-3200 90-98 (56-61)
S S2 S1 2160-2310 43-46 (27-29)
S1 - S2 3470-4180 38-45 (24-28)
Half throttle (1.6-2.2 volt) S2 -» S3 4020—4420 80-88 (50-55) Half throttle (1.6-2.2 volt) S4 - S3 3720-3950 163—173 (101-107)
S3 -> S2 2020-2410 62-74 (38-46)
Fully opened (4.3 volt) Li - L2 4930-5480 54-60 (33-37)
L Fully opened (4.3 volt) L2 - Li 2160-2310 43-46 (27-29)
Half throttle (1.6—2.2 volt) Li - L2 3470-4180 38-45 (24-28)
D2 -» D3 850-1160 17-23 (11—14)
0 D D3 ->• D2 230—420 7-13 (4—8)
o OD - D3 3720-3950 163—173 (101—107) I S Fully closed (0.5 volt) S3 - S2 2940-3200 90-98 (56-61)
L L2 - Li 2160—2310 43-49 (27-30)
76G07B-037
7B-39

7B ELECTRICAL SYSTEM COMPONENTS
76G07B-079
76G07B-080
76G07B-081
PULSE GENERATOR (G4A-EL)
Inspection
1. Disconnect the pulse generator connector.
2. Check for continuity between the terminals, if
necessary replace the pulse generator.
Resistance: 200—400fl
VEHICLE SPEED SENSOR (G4A-EL)
Inspection of voltage
1. Connect a voltmeter between the 1Q terminal of
the EC-AT control unit and ground as shown.
2. Turn the ignition switch ON.
3. Remove the speedometer cable from the transaxle.
4. Slowly turn the speedometer cable one turn.
5. Check that approx. 4.5V is shown 4 times.
6. If not correct, check the combination meter.
CRUISE CONTROL SWITCH (CRUISE CONTROL
UNIT)
Refer to Section 15.
IDLE SWITCH AND THROTTLE SENSOR
(G4A-EL)
Refer to Section 4A.
OD RELEASE SOLENOID VALVE (G4A-HL)
Inspection of Resistance
1. Disconnect the solenoid valve connector.
2. Check resistance between the terminals.
Resistance: 13—27 ft
3. If not correct, replace the solenoid valve.
76G07B-082
7B-68

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

9 OUTLINE
Front Axle
86U09X-002
1. Lock nut 4. Driveshaft
2. Disc plate 5. Wheel speed sensor (ABS)
3. Caliper assembly
9—4

OUTLINE 9
Rear Axle
Drum brake
Disc brake
1. Lock nut
2. Brake drum
3. Back plate
4. Parking cable
5. Brake pipe
6. Disc plate
7. Dust cover
8. Knuckle spindle
9. Wheel speed sensor (ABS)
86U09X-003
9—5

9 OUTLINE
Rear Axle (4WS)
86U09X-004
1. Lock nut 4. Knuckle spindle
2. Disc plate 5. Wheel speed sensor (ABS)
3. Dust cover 6. Shock absorber
SPECIFICATIONS
—-— Engine model
Item """ ~'
F6, F8, RF-N FE, RF-CX —-— Engine model
Item """ ~' Right Left Right Left
Length of joint mm (in)
(between centers of joints)
MTX 368.5 (14.51) 368.5 (14.51) 360.0 (14.17) 360.0 (14.17) Length of joint mm (in)
(between centers of joints) ATX 359.5 (14.15) 359.5 (14.15) 355.5 (14.00) 355.5 (14.00)
Shaft diameter mm (in) MTX 23.0 (0.91) 24.0 (0.94) Shaft diameter mm (in) ATX 23.0 (0.91) 24.0 (0.94)
76G09X-001
86U09X-082
9—6

FRONT AXLE 9
REMOVAL
Removal in the sequence shown in the figure referring to the removal note for the specially marked parts.
1. Hub cap
2. Lock nut
3. Caliper assembly
4. Disc plate
5. Tie-rod end
6. Stabilizer
7. Lower arm
8. Wheel speed sensor (ABS)
9. Knuckle
86U09X-009
Removal Note
Lock nut
1. Uncrimp the tab of the lock nut.
86U09X-010
9—9