Mitsubishi Outlander (2003+). Manual — part 37
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MFI)
13A-11
NOTE: If malfunctions have been detected in multi-
ple systems, store one malfunction only, which has
been detected first.
READINESS TEST STATUS
The engine-ECU monitors the following main diagno-
sis items, judges if these items are in good condition
or not, and the stores its history. this history can be
read out by using MUT-II. (If the ECU has judged a
item before, the MUT-II displays "Complete").
In addition, if diagnosis codes are erased or the bat-
tery cable is disconnected, this history will also be
erased (the memory will be reset).
Catalyst: P0420
Oxygen sensor: P0130
Oxygen sensor heater: P0135, P0141
FAIL-SAFE FUNCTION REFERENCE TABLE
When the main sensor malfunctions are detected by the diagnosis function, the vehicle is controlled by
means of the pre-set control logic to maintain safe conditions for driving.
88
Fuel control condition
Open loop
OL
Closed loop
CL
Open loop owing to drive condition
OL-DRV.
Open loop owing to system malfunction
OL-SYS.
Closed loop based on one oxygen sensor
CL- H02S
87
Calculation load value
%
Diagnosis code during data recording
-
Item No.
Data
Unit
Malfunctioning item
Control contents during malfunction
Air flow sensor
1. Uses the throttle position sensor signal and engine speed signal (crank angle
sensor signal) to take reading of the basic injector drive time and basic ignition
timing from the pre-set mapping.
2. Fixes the idle speed control servo in the appointed position so idle control is not
performed.
Intake air temperature
sensor
Controls as if the intake air temperature is 25
C.
Barometric pressure
sensor
Controls as if the barometric pressure is 101 kPa.
Throttle position sensor No increase in fuel injection amount during acceleration due to the throttle position
sensor signal.
Engine coolant
temperature sensor
Controls as if the engine coolant temperature is 80
C.
Camshaft position
sensor
Injectors fuel into the cylinders in the order 1-3-4-2 with irregular timing. (After the
ignition switch is turned to the "ON" position, the No. 1 cylinder top dead centre is
not detected at all)
Oxygen sensor (front)
Air/fuel ratio feedback control (closed loop control) is not performed.
Oxygen sensor (rear)
Performs the feedback control (closed loop control) of the air/fuel ratio by using
only the signal of the oxygen (front) installed on the front of the catalytic converter.
Detonation sensor
Fixes the ignition timing as that for regular gasoline.
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MFI)
13A-12
INSPECTION CHART FOR DIAGNOSIS CODE
M1131151000624
Ignition coil
(incorporating power
transistor)
Cuts off the fuel supply to cylinders with an abnormal ignition.
Alternator FR terminal
Does not control the output of the alternator according to an electrical load. (works
as a normal alternator)
Misfiring
If the detected misfiring causes damage to the catalyst, the misfiring cylinder will be
shut down.
Malfunctioning item
Control contents during malfunction
Code No.
Diagnosis item
Reference page
P0100
Air flow sensor system
P0105
Barometric pressure sensor system
P0110
Intake air temperature sensor system
P0115
Engine coolant temperature sensor system
P0120
Throttle position sensor system
P0125*
Feedback system monitor
P0130
Oxygen sensor (front) system <Sensor 1>
P0135
Oxygen sensor heater (front) system <Sensor 1>
P0136 Oxygen sensor (rear) system <Sensor 2>
P0141 Oxygen sensor heater (rear) system <Sensor 2>
P0201
No.1 Injector system
P0203
No.3 Injector system
P0300
Random cylinder mis-fire detection system
P0301*
No.1 cylinder mis-fire detection system
P0302*
No.2 cylinder mis-fire detection system
P0303*
No.3 cylinder mis-fire detection system
P0304*
No.4 cylinder mis-fire detection system
P0325
Detonation sensor system
P0335
Crank angle sensor system
P0340
Camshaft position sensor system
P0403
EGR control solenoid valve system
P0420
Catalyst deterioration system
P0443 Purge control solenoid valve system
P0500
Vehicle speed sensor system
P0505
Idle speed control system
P0551*
Power steering fluid pressure switch system
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MFI)
13A-13
NOTE:
.
Do not replace the engine-ECU until a through terminal check reveals there are no short/open circuit.
Check that the engine-ECU earth circuit is normal before checking for the cause of the problem.
After the engine-ECU has detected a malfunction, a diagnosis code is recorded the next time the engine
is started and the same malfunction is re-detected. However, for items marked with "*", the diagnosis
code is recorded on the first detection of the malfunction.
Sensor 1 indicates the sensor mounted at a position closest to the engine, and sensor 2 indicates the sen-
sor mounted at the position second closest to the engine.
P0622
Alternator FR terminal system
P1603*
Battery back-up line system
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MFI)
13A-14
INSPECTION PROCEDURE FOR
DIAGNOSIS CODES
Code No. P0100 Air Flow Sensor System
AK300252
1 2 3 4 5 6 7
1
2
3
4
34
33
32
36
35
37
42
45
31
39
38
46
40 41
43 44
1
14
4
19
5
22
6
17
8
15
9
18
7
20
16
2
13
12
23 24 25 26
21
3
10 11
82
78
81
80
89 90 9192
79
87
71
74
73
72
76
75
77
85
88
83 84
86
5 V
AB
B-08
Engine control relay
Battery
Air flow sensor
19
7
40
90
4
5
3
G-B
G-W
W-B
W-B
G-W
W-R
R
Wire colour code
B: Black LG: Light green G: Green L: Blue W: White Y: Yellow SB: Sky blue BR: Brown O: Orange GR: Gray
R: Red P: Pink V:Violet
Engine-ECU
4
3
1
2
B-17X
Air flow sensor circuit
20
17
J/C (1)
C-16
C-137
C-134
C-135
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