Mitsubishi Eclipse / Eclipse Spyder (2000-2002). Service and repair manual — part 81
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
13A-23
Starting
Cranks, won't start
5
Fires up and dies
6
Hard starting
7
Idling stability
(improper
idling)
Unstable idle (rough idle, hunting)
8
Idle speed is high (improper idle speed)
9
Idle speed is low (improper idle speed)
10
Idling stability
(engine stalls)
When the engine is cold, it stalls at idle (die out)
11
When the engine is hot, it stalls at idle (die out)
12
The engine stalls when accelerating (pass out)
13
The engine stalls when decelerating
14
Driving
Hesitation, sag or stumble
15
Acceleration shock
16
Deceleration shock
17
Poor acceleration
18
Surge
19
Knocking
20
Dieseling
21
Too high CO and HC concentration when idling
22
IM240 test
failure
Transient, mass emission tailpipe test failure
23
Purge flow test of the evaporative emission canister
failure
24
Pressure test of the evaporative system failure
25
Generator output voltage is low (approximately 12.3 volts)
26
Improper engine idle speed when the A/C is on (A/C switch 2 signal)
27
Fans (radiator fan, A/C condenser fan) are inoperative
28
Power supply system and ignition switch-IG system
29
Fuel pump system
30
Ignition switch
−
ST system <M/T>
31
Ignition switch-ST system and park/neutral position switch system
<A/T>
32
Ignition circuit system
33
A/C system
34
SYMPTOMS
INSPECTION
PROCEDURE
REFERENCE PAGE
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
13A-24
PROBLEM SYMPTOMS TABLE (FOR YOUR
INFORMATION)
ITEMS
SYMPTOM
Starting
Won't start
The starter is used to crank the engine, but there is no combustion
within the cylinders, and the engine won't start.
Fires up and dies The engine starts, but then the engine soon stalls.
Hard starting
Engine starts after cranking a while.
Idling stability
Hunting
Engine speed doesn't remain constant; changes at idle.
Rough idle
Usually, a judgement can be based upon the movement of the
tachometer pointer, and the vibration transmitted to the steering wheel,
shift lever, body, etc.
Incorrect idle
speed
The engine doesn't idle at the usual correct speed.
Engine stall (die
out)
The engine stalls when the foot is taken from the accelerator pedal,
regardless of whether the vehicle is moving or not.
Engine stall
(pass out)
The engine stalls when the accelerator pedal is depressed or while it is
being used.
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
13A-25
Driving
Hesitation Sag
" Hesitation " is the delay in
response of the vehicle speed
(engine speed). This occurs when
the accelerator is depressed in
order to accelerate from the speed
at which the vehicle is now
traveling, or a temporary drop in
vehicle speed (engine speed)
during such acceleration.
Serious hesitation is called " sag. "
Poor
acceleration
Poor acceleration is inability to obtain an acceleration corresponding to
the degree of throttle opening, even though acceleration is smooth or
the inability to reach maximum speed.
Stumble
Engine speed increase is delayed
when the accelerator pedal is
initially depressed for acceleration.
Shock
The feeling of a comparatively large impact or vibration when the
engine is accelerated or decelerated.
Surge
This is slight acceleration and deceleration feel usually felt during
steady, light throttle cruise. Most notable under light loads.
Knocking
A sharp sound during driving like a hammer striking the cylinder walls.
Stopping
Run on
("dieseling ")
The condition in which the engine continues to run after the ignition
switch is turned to off. Also called " dieseling. "
ITEMS
SYMPTOM
AKX01361
VEHICLE
SPEED
TIME
NORMAL
HESITATION
SAG
INITIAL
ACCELE-
RATOR
PEDAL
DEPRE-
SSION
AKX01361AB
AKX01362
VEHICLE
SPEED
TIME
NORMAL
STUMBLE
INITIAL
ACCEL-
ERATOR
PEDAL
DEP-
RESSION
IDLING
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
13A-26
DIAGNOSTIC TROUBLE CODE PROCEDURES
DTC P0101: Volume Air Flow Circuit Range/Performance Ploblem
AK000652
1 2 3 4 5 6 7
42 43
48 49 50 51 52 53 54 55 56 57
46
45
44
58 59
60 61 62 63
64 65 66
2
3 4
5 6
7 8
9
11 12 13 14 15 16 17 18 19 20
30
21 22 23
24
25
26 27 28 29
31 32 33
34 35
1
14
RED
RED
-
WHITE
RED
-
WHITE
47
4
19
5
22
6
17
8
15
9
18
7
20
16
2
13
12
23 24 25 26
21
1
3
41
10
RED
-
WHITE
3 4
1 2
GREEN-BL
UE
BL
ACK
WHITE-GREEN
82
78
81
80
89 90 91 92
79
87
71
74
73
72
76
75
77
85
88
83 84
86
B-14
MFI
RELAY
BATTERY
VOLUME AIR
FLOW SENSOR
5V
19
7
92<M/T>*1
57<A/T>*2
90<M/T>*1
65<A/T>*2
4
5
3
C-60<M/T>
(MU803772)
C-49<M/T>
(MU803773)
C-50<A/T>
(MU803784)
C-54<A/T>
(MU803781)
NOTE
*1:ECM connector C-60<M/T>
*2:PCM connector C-54<A/T>
ENGINE CONTROL
MODULE(ECM)<M/T>
OR
POWERTRAIN CONTROL
MODULE(PCM)<A/T>
3
4
1
2
A-21X
10 11
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