diagram MAZDA 626 1987 User Guide

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

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

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

10
STEERING SYSTEM
OUTLINE 10— 2
STRUCTURAL VIEW 10— 2 SPECIFICATIONS 10— 6
TROUBLESHOOTING GUIDE 10— 7
MANUAL STEERING 10— 7
POWER STEERING 10— 8
4WS 10— 9
ON-VEHICLE MAINTENANCE 10— 10
STEERING WHEEL PLAY 10— 10
LOOSENESS OR PLAY OF THE
STEERING WHEEL 10— 10
STEERING WHEEL EFFORT 10— 10
POWER STEERING FLUID LEVEL 1 fl-11
LOOSE OR DAMAGED
OIL PUMP BELT IC— 12
REAR STEERING GEAR OIL 10— 12 LEAKAGE OF POWER STEERING
FLUID 10— 13
INSPECTION AND ADJUSTMENT. 10— 15
BLEEDING OF POWER STEERING
SYSTEM 10— 15
POWER STEERING PRESSURE ... 10— 16
TIE-ROD END BOOTS 10— 18
REMOVAL AND INSTALLATION .. 10— 18
STEERING WHEEL AND COLUMN 10— 21
STRUCTURAL VIEW 10— 21
REMOVAL 10— 22
DISASSEMBLY AND ASSEMBLY.. 10— 24
INSPECTION 10— 25
INSTALLATION 1 fl-27
STEERING GEAR AND LINKAGE .. IC— 28
STRUCTURAL VIEW 10— 28
REMOVAL 10— 29
INSTALLATION 10— 30
4-WHEEL STEERING GEAR AND
LINKAGE 10— 31
STRUCTURAL VIEW 10— 31 4WS PERFORMANCE INSPECTION 10— 32
ADJUSTMENT OF STEERING
ANGLE TRASFER SHAFT 10— 35
REMOVAL AND INSTALLATION .. 10— 37
INSPECTION 10— 44
MANUAL STEERING 10— 48
DISASSEMBLY 10— 48
INSPECTION 10— 51
ASSEMBLY 10— 52
ENGINE SPEED SENSING POWER
STEERING 10— 58
DISASSEMBLY 10— 58
INSPECTION 10— 62
ASSEMBLY 10— 64
ELECTRONICALLY-CONTROLLED
POWER STEERING 10— 75
DISASSEMBLY 10— 75
INSPECTION 10— 78
ASSEMBLY 10— 79
OIL PUMP 10— 83
REMOVAL AND INSTALLATION .. 10— 83
ELECTRICAL COMPONENTS OF
ELECTRONICALLY-CONTROLLED
POWER STEERING 10— 87
CIRCUIT DIAGRAM 10— 87
TROUBLESHOOTING GUIDE 10— 87
TROUBLESHOOTING 10— 87
ELECTRICAL COMPONENTS OF
4 WHEEL STEERING 10— 94
CIRCUIT DIAGRAM 10— 94
TROUBLESHOOTING GUIDE 10— 95
TROUBLESHOOTING 10— 95
4WS WARNING LIGHT 10—102
SPEED SENSOR (IN METER) 10—103
SPEED SENSOR (AT TRANSAXLE) 10—103
REAR-TO-FRONT STEERING
RATIO SENSOR 10—103
OIL LEVEL SWITCH
(IN P/S RESERVOIR) 10—103
RELAY AND TIMER 10—104 76G10X-001

ELECTRICAL COMPONENTS OF ELECTRONICALLY-CONTROLLED POWER STEERING (ECPS) 1 0

ELECTRICAL
COMPONENTS
OF
ELECTRONICALLY-CONTROLLED POW-
ER STEERING (ECPS)
CIRCUIT DIAGRAM
J POWER STEERING CONTROL SYSTEM (Electronically-Controlled: FE DOHC Engine Without 4WS) AUTO ADJUSTING SUSPENSION CONTROL SYSTEM (AAS)

MAIN FUSE

IcLJ=.cLLJX..=L1.| T'TTTTT'P LB YL GW GY * B «
I-02
Solenoid Valve
[EM] J-04
Check Connector |F|

VG-j-Ijj-LW
J-05
AAS
Conlorl Unit |R| YR YL GR BY B GY WY WR \LL L LuL I 1 L I T. T TTT T T. T,i B G GW LY WL IT TT TI
J-07 Aclualor (FL) |F] WY WR J-08 Aclualor (FR) [D] WY WR J-09 Aclualor (RL) [R| YL YR J-10 Aclualor
(RR) |R|
Yl YR
86U10X-208
Note
Refer to page 10—4 for the component location.
TROUBLESHOOTING GUIDE
The power steering control unit contains a self-diagnosis function to detect malfunctions within itself,
the ECPS electrical components and circuits.
If a malfunction is detected, the control unit indicates where the problem is located by outputting specific
voltage pulsations at terminal wire (YB) of the check connector.
Troubleshooting of the ECPS system, then, is easily performed by comparing the output pattern with
those of the Diagnosis Table on pages 10—89 and 90. 76G10X-019
TROUBLESHOOTING
How To Use Self-Diagnosis System
By using the control unit's self-diagnosis function and
a voltmeter, malfunctions of the system are easily de-
termined. When diagnosing malfunctions, follow the
steps below.
1. Connect a voltmeter to terminal wire (YB) of the
check connector in the engine compartment.
2. Check the output patterns as described on the fol-
lowing page.
86U10X-209
10—87

1 0 ELECTRICAL COMPONENTS OF 4-WHEEL STEERING
ELECTRICAL COMPONENTS OF 4-WHEEL STEERING (4WS)
CIRCUIT DIAGRAM
2 UJ I- >-CO -I o CC I-z o o „
0 uoipas)
''R cc ~~w josuas paads oi
=
8<--0 D—S
--0 D-* H 8
--0
D--S
l-S
s-U
0
s g~o 5-s
S--0 D~°
'-HH J
D-c
>-[In
J—0 &-c

1
Note
Refer to page 10—31 for component location.
86U10X-221
10—94