Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Mitsubishi Eclipse & Spyder 2000-2006 Approved Mitsubishi Eclipse 2006 GR00005900A-13B
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13B-1
GROUP 13B
MULTIPORT FUEL
INJECTION (MFI)
<3.8L ENGINE>
CONTENTS
GENERAL DESCRIPTION. . . . . . . . . 13B-3 ON-VEHICLE SERVICE . . . . . . . . . 13B-1275
COMPONENT LOCATION . . . . . . . . . . . . . 13B-1275
MULTIPORT FUEL INJECTION (MFI) THROTTLE BODY (THROTTLE VALVE
DIAGNOSIS . . . . . . . . . . . . . . . . . . . . 13B-6 AREA) CLEANING . . . . . . . . . . . . . . . . . . . 13B-1280
TROUBLESHOOTING STRATEGY . . . . . . 13B-6 FUEL PRESSURE TEST . . . . . . . . . . . . . . 13B-1280
DIAGNOSTIC FUNCTION . . . . . . . . . . . . . 13B-6 FUEL PUMP CONNECTOR DISCONNECTION
FAIL-SAFE FUNCTION REFERENCE (HOW TO REDUCE PRESSURIZED FUEL
TABLE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13B-41 LINES) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13B-1283
DIAGNOSTIC TROUBLE CODE CHART . . 13B-43 FUEL PUMP OPERATION CHECK . . . . . . 13B-1283
SYMPTOM CHART. . . . . . . . . . . . . . . . . . . 13B-48 MULTIPORT FUEL INJECTION (MFI)
RELAY AND THROTTLE ACTUATOR
DIAGNOSTIC TROUBLE CODE
CONTROL MOTOR RELAY CONTINUITY
PROCEDURES. . . . . . . . . . . . . . . . . . . . . . 13B-52
CHECK . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13B-1283
SYMPTOM PROCEDURES . . . . . . . . . . . . 13B-1085
FUEL PUMP RELAY CONTINUITY
DATA LIST REFERENCE TABLE . . . . . . . 13B-1230 CHECK . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13B-1284
GENERAL SCAN TOOL (GST) MODE 01 INTAKE AIR TEMPERATURE SENSOR
REFERENCE TABLE . . . . . . . . . . . . . . . . . 13B-1241 CHECK . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13B-1284
ACTUATOR TEST REFERENCE TABLE. . 13B-1251 ENGINE COOLANT TEMPERATURE
CHECK AT THE ENGINE CONTROL SENSOR CHECK . . . . . . . . . . . . . . . . . . . . 13B-1285
MODULE (ECM) OR THE HEATED OXYGEN SENSOR CHECK . . . . 13B-1285
POWERTRAIN CONTROL MODULE INJECTOR CHECK . . . . . . . . . . . . . . . . . . . 13B-1288
(PCM) . . . . . . . . . . . . . . . . . . . . . . . . 13B-1253
THROTTLE ACTUATOR CONTROL
INSPECTION PROCEDURE USING AN MOTOR CHECK . . . . . . . . . . . . . . . . . . . . . 13B-1288
OSCILLOSCOPE . . . . . . . . . . . . . . . . . . . . 13B-1263
ENGINE OIL CONTROL VALVE CHECK . . 13A-1208
EVAPORATIVE EMISSION PURGE
SPECIAL TOOLS. . . . . . . . . . . . . . 13B-1273
SOLENOID CHECK . . . . . . . . . . . . . . . . . . 13B-1289
EVAPORATVE EMISSION VENTILATION
SOLENOID CHECK . . . . . . . . . . . . . . . . . . 13B-1289
EGR VALVE CHECK. . . . . . . . . . . . . . . . . . 13B-1289
Continued on next page
13B-2
INJECTOR . . . . . . . . . . . . . . . . . . . 13B-1290 FASTENER TIGHTENING
REMOVAL AND INSTALLATION . . . . . . . . 13B-1290 SPECIFICATIONS . . . . . . . . . . . . . 13B-1297
FASTENER TIGHTENING
THROTTLE BODY ASSEMBLY . . 13B-1293 SPECIFICATIONS. . . . . . . . . . . . . . . . . . . . 13B-1297
REMOVAL AND INSTALLATION . . . . . . . . 13B-1293 GENERAL SPECIFICATIONS . . . . . . . . . . 13B-1297
SERVICE SPECIFICATIONS . . . . . . . . . . . 13B-1299
ENGINE CONTROL MODULE (ECM) SEALANT AND ADHESIVE . . . . . . . . . . . . 13B-1299
AND POWERTRAIN CONTROL
MODULE (PCM). . . . . . . . . . . . . . . 13B-1295
REMOVAL AND INSTALLATION . . . . . . . . 13B-1295
MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>
GENERAL DESCRIPTION
13B-3
GENERAL DESCRIPTION
M1131000102257
. .
The Multiport Fuel Injection System consists of sen- THROTTLE VALVE OPENING CONTROL
sors which detect the engine conditions, the ENGINE This system electrically controls the opening of the
CONTROL MODULE (ECM) POWERTRAIN throttle valve. The ECM or the PCM
CONTROL MODULE (PCM) which controls detects the amount of travel of the accelerator pedal
the system based on signals from these sensors, via the accelerator pedal position sensor, and con-
and actuators which operate under the control of the trols the actuation of the throttle actuator control
ECM or the PCM . motor, which is mounted on the throttle body, in order
The ECM or the PCM carries out activ- to attain the target throttle valve opening that has
ities such as fuel injection control, idle air control, been predetermined in accordance with driving con-
and ignition timing control. ditions.
In addition, the ECM or the PCM is
equipped with several diagnostic test modes which .
simplify troubleshooting when a problem develops. IDLE AIR CONTROL
The idle speed is kept at the optimum speed by con-
trolling the amount of air that passes through the
.
FUEL INJECTION CONTROL
throttle valve in accordance with changes in idling
The injector drive times and injector timing are con- conditions and engine load during idling.
trolled so that the optimum air/fuel mixture is sup- The ECM or the PCM drives the throt-
plied to the engine to correspond to the tle actuator control motor to keep the engine running
continually-changing engine operation conditions. at the pre-set idle target speed in accordance with
A single injector is mounted at the intake port of each the engine coolant temperature and A/C and other
cylinder. Fuel is sent under pressure from the fuel electrical load. In addition, when the air conditioning
tank to the fuel injectors by the fuel pump, with the switch is turned off and on while the engine is idling,
pressure being regulated by the fuel pressure regula- the throttle actuator control motor adjusts the throttle
tor. The regulated fuel is distributed to each of the valve pass-through air amount according to the
injectors. engine load conditions to avoid fluctuations in the
Fuel injection is normally carried out once for each engine speed.
cylinder for every two rotations of the crankshaft.
The firing order is 1-2-3-4-5-6. Each cylinder has a .
dedicated fuel injector. This is called multiport. IGNITION TIMING CONTROL
The ECM or the PCM provides a richer The ignition power transistor located in the ignition
air/fuel mixture by carrying out "open-loop" control primary circuit turns ON and OFF to control the pri-
when the engine is cold or operating under high load mary current flow to the ignition coil. This controls the
conditions in order to maintain engine perfor- ignition timing to provide the optimum ignition timing
mance.In addition, when the engine is under normal with respect to the engine operating conditions. The
operating temperature after warming-up, the ECM ignition timing is determined by the ECM or
or the PCM controls the air/fuel mixture the PCM from engine speed, intake air vol-
by using the heated oxygen sensor signal to carry ume, engine coolant temperature, and atmospheric
out "closed-loop" control. The closed-loop control pressure.
achieves the theoretical air/fuel mixture ratio where .
the catalytic converter can obtains the maximum
cleaning performance.
TSB Revision
13B-4 MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>
GENERAL DESCRIPTION
DIAGNOSTIC TEST MODE A/C Compressor Clutch Relay Control
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