1987 MAZDA 626 cruise control

TROUBLESHOOTING (G4A-HL) 7B
STEP 2 (ELECTRICAL SYSTEM INSPECTION)
In this step, the function of the electrical control system (Inhibition of OD and lock-up) is checked. The
electrical control system components should be checked to determine if it functions correctly.
76G07B-048
O/D OFF Switch Inhibition Function
1. Warm up the engine and ATF.
2. Check that the D range, OD, and lock-up is
provided.
3. When driving the vehicle with D range, OD, and
lock-up selected, depress the O/D OFF switch and
check that OD and lock-up is cancelled.
4. If not cancelled, check the O/D OFF switch.
5. Release the O/D OFF switch after completion.
Cruise Control Switch Inhibition Function
1. Drive the vehicle in D range, OD, and lock-up
selected again.
2. Depress the Set switch of the cruise control and
check that OD and lock-up is cancelled.
3. If not cancelled, check the cruise control system.
4. Again drive the vehicle in D range, OD, and
lock-up.
5. Turn the Resume switch of the cruise control and
check that OD and lock-up is cancelled.
6. If not cancelled, check the cruise control system.
76G07B-051
7B—47

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

15
BODY ELECTRICAL SYSTEM
INTRODUCTION 15- 2 HOW TO USE THIS SECTION 15— 2 ELECTRICAL TROUBLESHOOTING TOOLS 15- 2 PRECAUTION 15— 3 ELECTRICAL SYMBOLS 15- 6 LOCATION OF UNIT, RELAY AND SWITCH 15- 7
STRUCTURAL VIEW 15— 7 MAIN FUSE BLOCK 15- 9 STRUCTURAL VIEW 15— 9 REPLACEMENT 15—10 IGNITION SWITCH 15—10
INSPECTION 15— 10 JOINT BOX AND FUSE 15—11
STRUCTURAL VIEW 15—11
COMBINATION SWITCH 15-12 STRUCTURAL VIEW 15- 12 INSPECTION 15— 13 CLUSTER SWITCH 15—17 STRUCTURAL VIEW 15— 17 INSPECTION OF ROCKER TYPE 15— 19
INSPECTION OF PUSH TYPE 15— 20 METER 15— 22 STRUCTURAL VIEW 15— 22 DISASSEMBLY AND ASSEMBLY 15— 23
TROUBLESHOOTING 15— 24 INSPECTION OF ANALOG METER .... 15— 26 INSPECTION OF DIGITAL METER 15— 27
INSPECTION OF METER SENDER 15— 29 WARNING LIGHT AND SENDER 15- 31 CIRCUIT DIAGRAM 15— 31
TROUBLESHOOTING 15- 32 INSPECTION 15— 39 CENTRAL PROCESSING UNIT 15— 41 STRUCTURAL VIEW 15— 41 FUNCTIONS 15- 41 CIRCUIT DIAGRAM 15— 42 REMOVAL AND INSTALLATION 15— 43
ON-VEHICLE INSPECTION 15- 43 TURN AND HAZARD LIGHT 15- 44 STRUCTURAL VIEW 15— 44 CIRCUIT DIAGRAM 15— 45
TROUBLESHOOTING 15- 46 INSPECTION 15— 47 STOP LIGHT 15— 48
STRUCTURAL VIEW 15— 48 CIRCUIT DIAGRAM 15— 49
TROUBLESHOOTING 15- 49 INSPECTION 15- 50 HORN 15— 52 STRUCTURAL VIEW 15— 52 CIRCUIT DIAGRAM 15— 52 TROUBLESHOOTING 15— 53 INSPECTION 15-53 HEADLIGHT 15— 54 CIRCUIT DIAGRAM 15— 54 TROUBLESHOOTING 15— 54 INSPECTION 15— 55 PANEL LIGHT CONTROL 15— 56 CIRCUIT DIAGRAM 15— 56
TROUBLESHOOTING 15_ 5fi INSPECTION 17 REAR WINDOW DEFROSTER ..i".'! 15- 58
STRUCTURAL VIEW 15-5fl CIRCUIT DIAGRAM 15_ «
TROUBLESHOOTING '.. 15_ 59
INSPECTION
15-60 POWER WINDOW 15-61 STRUCTURAL VIEW il_ «1 CIRCUIT DIAGRAM 15_ 62 TROUBLESHOOTING 15- «3 INSPECTION 15-66 REMOTE CONTROL MIRROR ........15- 69 STRUCTURAL VIEW 15-69 CIRCUIT DIAGRAM 15_ 69
TROUBLESHOOTING 15_ 70 INSPECTION 15_ 70 REAR WINDOW WIPER 15_ 71 STRUCTURAL VIEW 15-71 CIRCUIT DIAGRAM .'.'.'...' 15_ 72
TROUBLESHOOTING 15-73 INSPECTION 15-75 WINDSHIELD WIPER 15-76 STRUCTURAL VIEW ' ' 15— 7e
DISASSEMBLY AND ASSEMBLY OF WIPER MOTOR 15_ 76 CIRCUIT DIAGRAM 15-77 TROUBLESHOOTING " " 15— 70 INSPECTION 15-81 CRUISE CONTROL SYSTEM 15- 82 STRUCTURAL VIEW 15-82 CIRCUIT DIAGRAM 15-83 ON-VEHICLE INSPECTION \..\m 15- 84 INSPECTION 15-87 SLIDING SUNROOF 15-89 STRUCTURAL VIEW 15_ 89 CIRCUIT DIAGRAM i5_ 90
TROUBLESHOOTING 15— 91 INSPECTION 15_ 90 AUTO ADJUSTING SUSPENSION 15— 94
CIRCUIT DIAGRAM 15- 94
TROUBLESHOOTING GUIDE 15— 94
TROUBLESHOOTING 15— 94
INSPECTION 15-104
POWER DOOR LOCK 15-105
STRUCTURAL VIEW 15-105
CIRCUIT DIAGRAM 15-105
TROUBLESHOOTING 15-106 INSPECTION 15-107 AUDIO SYSTEM " 15_108 OUTLINE OF AUDIO SYSTEM 15-108 REAR CONNECTOR VIEW 15-109 ADJUSTMENT (MTR) 15—114 POWER ANTENNA 15-114 HEATER J
STRUCTURAL VIEW 15-116 AIR FLOW AT EACH MODE 15-117 RATE OF AIR FLOW 15-119 LEVER CONTROL TYPE 15-120 LOGICAL CONTROL
TYPE
15—121 LOGICON SWITCH 15—123
76G15X-001

LOCATION OF UNIT, RELAY AND SWITCH 1 5
LOCATION OF
UNIT,
RELAY AND SWITCH
STRUCTURAL VIEW
Door SW
Power window SW
AAS control unit
Cruise control unit
Relay box
(EGI and Diesel model)
Engine control unit
Brake fluid level sensor
Main fuse block
(EGI model)
Main fuse block
(Carburetor model) | \ Relay box
Main fuse block Relay box
(Diesel model) (Carburetor model)
Power window SW
Door SW
Door lock SW
AAS control SW
CPU and joint box
86U15X-002
15-7

1 5 LOCATION OF UNIT, RELAY AND SWITCH
STRUCTURAL VIEW
Hatchback
Light and turn switch
Rear wiper switch
Rear washer switch
Front wiper and washer
switch, and cruise control switch
/ Hazard switch (Except RHD model)
Rear def. switch (Except ECE)
Rear fog light switch (For ECE)
AAS switch
Headlight cleaner switch
Remote control mirror switch
Heater control switch
Driving mode selector switch
Cruise control main switch
Coupe/MX-6 and Sedan

-nr
J

nu
iTPD'i
Rear def, switch (Except ECE) Hazarc
Rear fog light switch (For ECE)
switch (Except RHD model)
15-8
86U15X-003

1 5 COMBINATION SWITCH
CONBINATION SWITCH
STRUCTURAL VIEW
Left hand drive
Alignment mark
Right hand drive
Alignment mark
76G15X-002
1. Light and turn signal switch lever
2. Windshield wiper and washer switch lever
3. Cruise control switch
4. Steering angle sensor
5. Hazard switch
6. Light switch connectors
7. Turn signal switch connector
8. Windshield wiper and washer switch con-
nector
9. Steering angle sensor connector
10. Turn signal and hazard switch connector
15—12

COMBINATION SWITCH 1 5
Variable speed intermittent wiper timer control
resistance

—Terminal
Position
—
IV1
-
IV2

Slow
0
— 1 kO

Fast
40
— 60 kfi
86U15X-012
Cruise control switch

Terminal
Position
CO RE SE E
OFF
SET
0— •—O

Resume
O —o

Coast
pi o
Coast

O
-O:
indicates continuity

76G15X-030
15—15

1 5 CRUISE CONTROL SYSTEM
CRUISE CONTROL SYSTEM
STRUCTURAL VIEW
86U15X-146
1. Main switch
2. Control switch
3. Control unit
4. Stop switch
5. Clutch switch (MTX)
6. Actuator
7. Inhibitor switch (ATX)
15-82