lock MAZDA 626 1987 Workshop Manual

7B TROUBLESHOOTING (G4A-HL)
76G07B-052
Water Temperature Switch Inhibition Function
1. Stop the vehicle.
2. Disconnect the water temperature switch con-
nector.
3. Drive the vehicle in D range selected.
4. Check that OD and lock-up does not operate.
5. If not cancelled, check the wiring harness of the
water temperature switch.
6. Stop the vehicle and reconnect the water temper-
ature switch connector.
Kick-down Switch Inhibition Function
1. Connect the terminals of the kick-down switch con-
nector with a jumper wire.
2. Drive the vehicle in D range selected.
3. Check that the OD and lock-up do not achieve.
4. If not correct, check wiring harness of kick-down
switch.
5. Stop the vehicle and reconnect the connector to
the switch.
7B—48

TROUBLESHOOTING (G4A-HL) 7B
STEP 5 (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 mechanical sections.
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 depress the OD OFF switch.
2. Accelerate the vehicle with half (4/8) and full (8/8) 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 shift diagram.
Note
a) Vehicle speed on a chassis roller may not meet the specified shift diagram because of
tire size.
b) There is no lock-up or OD when the coolant temperature is below 72°C (162°F), and when
the OD OFF switch is depressed.
4. Check the up and down shifts for shift shock or slippage.
5. While driving in 3rd (50—60 km/h, 31—37 mph) shift the selector lever to 2 range and check that
3-2 downshift immediately occurs, then decelerate and check that engine braking effect is felt in
2nd gear.
D range shift diagram
FE engine
Caution
8/8 n
-OD
0 20(12) 40(25) 60(37) 80(50) 100(63) 120(74) 140(87)
Vehicle speed km/h (mph)
76GC7B-057
7B—53

7B TROUBLESHOOTING (G4A-HL)
Noise and vibration
Drive the vehicle in OD (lock-up), OD (no lock-up), 3rd 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, 3-*2,
3->1, 2-> 1, and the shift points are as shown in the shift diagram.
2 Range Test
Shift pattern
1. Shift the selector lever to 2 range.
2. Accelerate the vehicle in 2 range and check that 2nd gear is held.
Noise and vibration
Drive the vehicle in 2nd gear 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.
7B—54

TROUBLESHOOTING (G4A-HL) 7B
1 Range Test
Shift pattern
1. Shift the selector lever to 1 range.
2. Accelerate the vehicle with half (4/8) and full (8/8) throttle valve opening.
3. Check that the 1-2 up- and down-shifts are obtained and that no 3rd gear, no OD, and no lock-up
are obtained. The shift points must be as shown in the 1 range shift diagram.
Note
Vehicle speed on a chassis roller may not meet the specified shift diagram because of tire
size.
4. Check the up and down-shifts for shift shock or slippage.
5. Drive in 1st gear then decelerate and check that engine braking effect is felt.
1 range shift diagram
FE engine
8/8-1 i
7/8-
6/8-2
2 CT>
I 4/8-a> a. o a> 3/8-
o
2/8-
1/8-
20 40 60 80 (25) (37) (50)
Vehicle speed km/h (mph)
80 100 120 140 (63) (74) (87) (12)
76G07B-059
7B—55

7B TROUBLESHOOTING (G4A-HL)
F8 engine
8/8-1
7/8-
6/8-<u
O) I
i ! O) Q.
o 3/8- [ ^ I o
jE 2/8-1 I
1/8- |
0/8 ' 1 ' 1 ' 1 1 1 1 1 1— ' l 0 20 40 60 80 100 120 140 (12) (25) (37) (50) (63) (74) (87)
Vehicle speed km/h (mph)
76G07B-060
Noise and vibration
Drive the vehicle in 1st gear 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.
P Range Test
1. Shift into P range on a gentle slope, release the brake and check that the vehicle does not roll.
2. Shift into P range while driving the vehicle at maximum of 4 km/h (2.5 mph) on a level surface,
and check that the vehicle stops.
Vehicle Speed at Gearshift Table
Range Throttle condition Shifting Vehicle speed km/h (mph) Range Throttle condition Shifting FE engine F8 engine
D
Fully opened 1st ->• 2nd 50-65 (31-40) 47-62 (29-38)
D
Fully opened 2nd - 3rd 100-115 (62-71) 94-109 (58—68)
D
Half throttle (1/2)
1st - 2nd 17-32 (11-20) 16—31 (10—19)
D
Half throttle (1/2) 2nd -> 3rd 42-57 (26-35)
D
Half throttle (1/2) 3rd -> OD 79-94 (49-58) 74-89 (46-55)
D
Half throttle (1/2)
Lock-up 74-89 (46-55) D
Kick-down
OD - 3rd More than 88 (55) More than 82 (51) D
Kick-down
OD -> 2nd 34-103 (21-64) 33-97 (20-60)
D
Kick-down OD - 1st 27-49 (17-30) 26-48 (16-30)
D
Kick-down 3rd - 2nd 34—103 (21-64) 33-97 (20-60)
D
Kick-down
3rd - 1st
11
-49 (7—30) 10-48 (6-30)
D
Kick-down
2nd - 1st
1st - 2nd
4-49 (2-30) 3-48 (2-30)
1
Fully opened
2nd - 1st
1st - 2nd 56-71 (35-44) 52—67 (32—42)
1 Half throttle (1/2) 1st - 2nd 56-71 (35-44) 52-67 (32—42) 1
Kick-down 2nd -> 1st 46-61 (29-38) 43-58 (27-36)
D Fully opened 3rd lock-up 106-121 (66—75) 100-115 (62-71)
7B-56

TROUBLESHOOTING (G4A-HL) 7B
Evaluation
Condition Possible Cause
No 1-2 shift
Insufficient governor pressure
No 1-2 shift
Stuck 1 range control valve
No 1-2 shift Stuck 1-2 shift control valve No 1-2 shift
Stuck 1-2 shift valve
No 1-2 shift
No check ball (rubber ball)
No 2-3 shift
Insufficient governor pressure
No 2-3 shift
Stuck 2 range control valve
No 2-3 shift Stuck servo control valve No 2-3 shift
Stuck 2-3 shift valve
No 2-3 shift
No check ball (rubber ball)
No 3-OD shift
Insufficient governor pressure
No 3-OD shift
Excessive throttle pressure
No 3-OD shift Stuck OD release valve No 3-OD shift Stuck needle valve of the OD release solenoid valve No 3-OD shift
Stuck 3-4 shift valve
No 3-OD shift
No check ball (rubber ball)
No. Lock-up (Electric circuit is OK)
Insufficient governor pressure
No. Lock-up (Electric circuit is OK)
Stuck OD release valve
Stuck needle valve of the OD release solenoid valve No. Lock-up (Electric circuit is OK)
Stuck OD lock-up valve
No. Lock-up (Electric circuit is OK)
Stuck lock-up control valve
Shift occurred in 2 range Stuck 1-2 control valve Shift occurred in 2 range Stuck 2 range control valve
No kick-down Stuck throttle valve No kick-down Stuck kick-down valve
Incorrect shift point In D and 1 range
Excessive or insufficient governor pressure
Incorrect shift point In D and 1 range Excessive or insufficient throttle pressure Incorrect shift point In D and 1 range
Excessive or insufficient line pressure Incorrect shift point
In 1 range Stuck 1 range control valve
No engine braking effect
Stuck coasting bypass valve
No engine braking effect Fluid leakage from 2-3 accumulator seal rings No engine braking effect
No check ball (rubber ball)
Shift shock or slippage
In 1-2 and/or 3-OD shift
Fluid leakage from 1-2 accumulator seal rings
Shift shock or slippage
In 1-2 and/or 3-OD shift No check ball (rubber ball) or leakage
Shift shock or slippage
In 1-2 and/or 3-OD shift
No one-way check orifice or leakage
Shift shock or slippage In 2-3 shift
Fluid leakage from 2-3 accumulator seal ring
Shift shock or slippage In 2-3 shift
Stuck bypass valve
Shift shock or slippage In 2-3 shift
Stuck 2-3 timing valve
Shift shock or slippage In 2-3 shift Stuck coast bypass valve Shift shock or slippage In 2-3 shift
Stuck servo control valve Shift shock or slippage In 2-3 shift
No one-way check orifice or leakage
Shift shock or slippage In 2-3 shift
No check ball (rubber ball) or leakage
Shift shock or slippage
In 3-2 shift
Fluid leakage from 1-2 accumulator seal ring
Shift shock or slippage
In 3-2 shift No check ball (rubber ball) or leakage
Shift shock or slippage
In 3-2 shift Stuck 3-2 timing valve
Shift shock or slippage
In 3-2 shift
Stuck 3-2 capacity valve
83U07B-046
7B—57

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

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

7B ON-VEHICLE MAINTENANCE
86U07B-064
86U07B-065
t «
•A
0 0
0 »
LX] O 9
m
(2)

(1)

Button need not
be depressed
Button must be pressed
76F07B-022
6. Ensure that the ATF level is between the F and L
marks. Add ATF to specification, if necessary.
Low temperature scale:
20°C (68°F)
High temperature scale:
65°C (149°F)
ATF type:
Dexron II or M HI
Inspection of Condition
1. Check the ATF for discoloration.
2. Check the ATF for any unusual smell.
Note
Determine whether or not the automatic trans-
mission should be disassembled by observ-
ing the condition of fluid carefully.
If the fluid is muddy and varnished, it indicates
burned drive plates.
SELECTOR LEVER
Inspection
1. Check that the selector lever can only be shifted
as shown in the figure.
2. Make sure there is a click at each range when shift-
ed from P <-> L or P <-» 1 range.
3. Check that the position of the selector lever and
the indicator are exact.
4. Check that the button returns smoothly when used
to shift the selector.
Adjustment
1. Loosen locknuts A, B, and lockbolt C.
2. Shift the selector lever to P range.
3. Shift the transaxle to P range by moving the man-
ual shaft of the transaxle.
4. While holding the selector lever forward in P range,
tighten lockbolt C to the specified torque.
Tightening torque:
8—11 N-m (80—110 cm-kg, 67—95 in-lb)
76F07B-023
7B—72