Fuel And Emission Control Systems - Mazda MX-5 1990 Workshop Manual

F
FUEL AND EMISSION
CONTROL SYSTEMS
INDEX ........................................... F- 2
OUTLINE ••....••..•••••••.•••..••....•.•...••• F- 5
SYSTEM DIAGRAM ......................
F-
5
VACUUM HOSE ROUTING
DIAGRAM ................................. F- 6
WIRING DIAGRAM •••••••••••••••.••••••• F- 7
SPECiFiCATIONS .........................
F-
9
COMPONENT DESCRiPTIONS ••••••• F- 10
TROUBLESHOOTING GUiDE ........... F- 12
ENGINE CONTROL OPERATION
CHART .....................................
F- 12
RELATIONSHIP CHART ••••••••••••••••
F- 15
USING THIS SECTION .................. F- 16
DIAGNOSTIC INDEX •••••••••••••••••••• F- 18
PRECAUTION .............................
F- 19
SYMPTOM TROUBLESHOOTING ••••
F- 20
ENGINE TUNE-UP .......................... F- 74
BASIC INSPECTION •••••••••••••••••••••
F- 74
ADJUSTMENT .............................
F- 75
SELF-DIAGNOSIS FUNCTION •••••••••• F- 77
DESCRIPTION .............................
F- 77
PREPARATION ••••••••••••••••••••••••••••
F- 78
MALFUNCTION CODE NUMBER ... F- 78
SWITCH MONITOR FUNCTION •••••• F- 89
INTAKE AIR SySTEM ..................... F- 92
COMPONENTS •••••••••••••••••...••...••• F- 92
SYSTEM OPERATION ................... F- 93
THROTTLE BODy ........................
F- 94
INTAKE MANIFOLD ..................... F- 95
ACCELERATOR PEDAL
AND CABLE .............................. F- 96
IDLE SPEED CONTROL
(lSC) SYSTEM ............................. F- 97
DESCRIPTION .............................
F-
97
PREPARATION ............................
F- 98
SYSTEM OPERATION ................... F- 98
AIR VALVE .................................
F- 98
ISC VALVE .................................
F- 99
FUEL SYSTEM .............................. F-100
DESCRIPTION .............................
F-100
PRECAUTION .............................
F-101
SYSTEM OPERATION ••..•....•.•.......
F-102
FUEL TANK ................................
F-104
FUEL FILTER ..............................
F-106
FUEL PUMP ...............................
F-107
CIRCUIT OPENING RELAy ............
F-110
PRESSURE REGULATOR ..............
F-111
INJECTOR ••••...••...••.•••••••..••....•...
F-112
EXHAUST SySTEM ........................ F-115
COMPONENTS ••••••••••••••••••••.•••••••
F-115
OUTLINE OF EMISSION
CONTROL SySTEM ..••...••••••.••.•••.• F-116
STRUCTURAL ViEW ..................... F-116
POSITIVE CRANKCASE
VENTILATION (PCV) SySTEM ....... F-117
DESCRIPTION ............................. F-117
PCV VALVE ................................
F-117
EVAPORATIVE EMISSION
CONTROL SySTEM ...................... F-118
DESCRIPTION .............................
F-118
SOLENOID VALVE
(PURGE CONTROL) •••••••••••••••••••
F-119
TWO-WAY CHECK VALVE .............
F-119
FUEL VAPOR VALVE ...................
F-119
CHARCOAL CANiSTER .................
F-120
DECELERATION CONTROL SYSTEM F-121
DESCRIPTION ............................. F-121
DASHPOT ................................... F-121
CATALYTIC CONVERTER SYSTEM. F-122
DESCRIPTION ............................. F-122
CATALYTIC CONVERTER ..............
F-122
AIC CUT-OFF SySTEM .•....•............ F-123
DESCRIPTION ............................. F-123
DECHOKE CONTROL SySTEM ........ F-124
DESCRIPTION .............................
F-124
CONTROL SySTEM ....................... F-125
PREPARATION ............................
F-125
STRUCTURAL ViEW .....................
F-126
ENGINE CONTROL UNIT ..............
F-127
CRANK ANGLE SENSOR .............. F-134
AIRFLOW METER .••..............••.....
F-135
WATER THERMOSENSOR .............
F-136
THROTTLE SENSOR .............••.....
F-136
OXYGEN SENSOR .......................
F-138
MAIN RELAy ..............................
F-139
CLUTCH SWITCH ........................ F-139
NEUTRAL SWITCH .....••..••.........•. F-140
PIS PRESSURE SWITCH ...............
F-140
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