FUEL PUMP CONTROL
MULTIPORT FUEL SYSTEM (MFI)
13A-8
FUEL PUMP CONTROL
M2132017500019
•
A relay circuit has been added in order to supply
the power for actuating the fuel pump directly
from the battery. This system is the same as the
one used on the 2.0L engine (4G94) of the
Lancer.
•
A control function has been added to change the
fuel discharge volume of the fuel pump in two
stages in accordance with the engine load. When
the load on the engine is low if the fuel consump-
tion volume is also low, this control actuates the
fuel pump at a lower speed. As a result, the fuel
return volume decreases, reducing the discharge
of fuel vapors.
.
DESCRIPTION OF FUEL DISCHARGE VOLUME CONTROL
When the load on the engine is low, the engine con-
trol module (ECM) turns the power transistor ON,
which causes the current to flow through the coil of
the fuel pump relay 3. Accordingly, the contacts of
the relay open, causing the current to the fuel pump
to flow via the fuel pump resistor. Because the resis-
tor drops the voltage of the current, the supply volt-
age to the fuel pump decreases. As a result, the
pump speed decreases, thus reducing the fuel dis-
charge volume of the fuel pump.
When the load on the engine is higher than the pre-
scribed value, the ECM turns OFF the power transis-
tor, which causes the contacts in fuel pump relay 3 to
close. This eliminates the voltage drop by the resis-
tor. As a result, the pump speed increases, thus
increasing the fuel discharge volume of the fuel
pump.
AK202522
M
ON/OFF
HI/LO
AB
BATTERY
15A
FUEL
PUMP
RELAY 1
FUEL
PUMP
RELAY 3
FUEL PUMP
RESISTOR
FUEL
PUMP
RELAY 2
JUNCTION
BLOCK
OFF ON
OFF ON
OFF ON
7.5A
IGNITION SWITCH
R
ST
IG1
LOCK
ACC
IG2
FUEL
PUMP
ENGINE CONTROL
MODULE (ECM)
Содержание Lancer Evolution VIII 2003
Страница 14: ...36 1 GROUP 36 PARKING BRAKE CONTENTS GENERAL INFORMATION 36 2 ...
Страница 26: ...35 1 GROUP 35 SERVICE BRAKES CONTENTS SERVICE BRAKES 35A FOUR WHEEL ANTI LOCK BRAKE SYSTEM 4ABS 35B ...
Страница 27: ...NOTES ...
Страница 34: ...34 1 GROUP 34 REAR SUSPENSION CONTENTS GENERAL DESCRIPTION 34 2 ...
Страница 37: ...NOTES ...
Страница 38: ...33A 1 GROUP 33A FRONT SUSPENSION CONTENTS GENERAL DESCRIPTION 33A 2 LOWER ARM 33A 4 STRUT ASSEMBLY 33A 5 ...
Страница 43: ...NOTES ...
Страница 57: ...NOTES ...
Страница 58: ...31 1 GROUP 31 WHEEL AND TIRE CONTENTS GENERAL INFORMATION 31 2 ...
Страница 60: ...21 1 GROUP 21 CLUTCH CONTENTS GENERAL DESCRIPTION 21 2 ...
Страница 70: ...27 1 GROUP 27 REAR AXLE CONTENTS REAR AXLE 27 2 DIFFERENTIAL 27 3 ...
Страница 74: ...54 1 GROUP 54 CHASSIS ELECTRICAL CONTENTS CHASSIS ELECTRICAL 54A SIMPLIFIED WIRING SYSTEM SWS 54B ...
Страница 75: ...NOTES ...
Страница 85: ...NOTES ...
Страница 94: ...26 1 GROUP 26 FRONT AXLE CONTENTS GENERAL DESCRIPTION 26 2 ...
Страница 114: ...11A 1 GROUP 11A ENGINE CONTENTS GENERAL SPECIFICATIONS 11A 2 BASE ENGINE 11A 3 ...
Страница 119: ...NOTES ...
Страница 126: ...13B 1 GROUP 13B FUEL SUPPLY CONTENTS GENERAL DESCRIPTION 13B 2 FUEL TANK 13B 3 ...
Страница 129: ...NOTES ...
Страница 130: ...25 1 GROUP 25 PROPELLER SHAFT CONTENTS GENERAL DESCRIPTION 25 2 ...
Страница 132: ...16 1 GROUP 16 ENGINE ELECTRICAL CONTENTS CAMSHAFT POSITION SENSOR 16 2 ...
Страница 134: ...12 1 GROUP 12 ENGINE LUBRICATION CONTENTS GENERAL DESCRIPTION 12 2 ...
Страница 142: ...32 1 GROUP 32 POWER PLANT MOUNT CONTENTS GENERAL DESCRIPTION 32 2 ...
Страница 144: ...14 1 GROUP 14 ENGINE COOLING CONTENTS GENERAL DESCRIPTION 14 2 ...
Страница 146: ...52 1 GROUP 52 INTERIOR AND SUPPLEMENTAL SYSTEM SRS CONTENTS INTERIOR 52A SUPPLEMENTAL RESTRAINT SYSTEM SRS 52B ...
Страница 147: ...NOTES ...
Страница 161: ...NOTES ...
Страница 162: ...13 1 GROUP 13 FUEL CONTENTS MULTIPORT FUEL SYSTEM MFI 13A FUEL SUPPLY 13B ...
Страница 163: ...NOTES ...
Страница 177: ...NOTES ...
Страница 178: ...22A 1 GROUP 22A MANUAL TRANSAXLE CONTENTS GENERAL DESCRIPTION 22A 2 AWD SYSTEM 22A 4 TRANSMISSION CONTROL 22A 5 ...
Страница 183: ...NOTES ...
Страница 203: ...7 1 GROUP 7 WIRING AND PIPING DIAGRAM CONTENTS PIPING DIAGRAM 7 2 ...
Страница 246: ...NOTES ...
Страница 260: ...NOTES ...
Страница 264: ...NOTES ...
Страница 265: ...5 1 GROUP 5 SYNTHETIC RESIN PARTS CONTENTS LOCATION OF SYNTHETIC RESIN PARTS 5 2 ...
Страница 268: ...NOTES ...
Страница 276: ...NOTES ...
Страница 281: ...FENDER SHIELD WELDED PANEL REPLACEMENT 3 5 AB202219 C B C D E D AB WITH THE UPPER FRAME EXTENSION OUTER REMOVED B ...
Страница 283: ...FENDER SHIELD WELDED PANEL REPLACEMENT 3 7 NOTES ...
Страница 368: ...NOTES ...