Mitsubishi Colt Ralliart. Manual — part 14
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI) <4A9>
13A-10
TROUBLESHOOTING
DIAGNOSIS TROUBLESHOOTING FLOW
M1131150001390
Refer to
− How to Use Trouble-
shooting/Inspection Service Points
− How to Cope
with Intermittent Malfunctions.
DIAGNOSIS FUNCTION
M1131155501840
ENGINE WARNING LAMP (CHECK
ENGINE LAMP)
If an abnormality occurs in any of the following items
related to the Multipoint Fuel Injection (MPI) system,
the engine warning lamp will illuminate.
If the lamp remains illuminated or if the lamp illumi-
nates while the engine is running, check the diagno-
sis code output.
MD998706
Injector test set
• Measurement of fuel pressure
• Checking the spray condition of
injectors
MB991607
Injector test
harness
Checking the spray condition of
injector
MB991976
Injector test
holder assembly
Tool
Number
Name
Use
MD998706
MB991607
MB991976
AK402082AD
Engine
warning lamp
Main
Index
Group
TOC
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI) <4A9>
13A-11
ENGINE WARNING LAMP INSPECTION ITEMS
Code No.
Diagnosis item
−
Engine-ECU <M/T> or engine-CVT-ECU <CVT>
P0105
Manifold absolute pressure sensor system
P0110
Intake air temperature sensor system
P0115
Engine coolant temperature sensor system
P0122*
Throttle position sensor (main) circuit low input
P0123*
Throttle position sensor (main) circuit high input
P0125*
Feedback system monitor
P0130
Oxygen sensor (front) system
P0135
Oxygen sensor (front) heater system
P0136
Oxygen sensor (rear) system
P0141
Oxygen sensor (rear) heater system
P0170
Abnormal fuel system
P0201
No. 1 injector system
P0202
No. 2 injector system
P0203
No. 3 injector system
P0204
No. 4 injector system
P0222*
Throttle position sensor (sub) circuit low input
P0223*
Throttle position sensor (sub) circuit high input
P0300*
Random/multiple cylinder misfire detected
P0301*
No. 1 cylinder misfire detected
P0302*
No. 2 cylinder misfire detected
P0303*
No. 3 cylinder misfire detected
P0304*
No. 4 cylinder misfire detected
P0325
Detonation sensor system
P0335
Crank angle sensor system
P0340
Camshaft position sensor system
P0403
Exhaust gas recirculation control system <CVT>
P0421
Warm up catalyst malfunction
P0443
Purge control solenoid valve system
P0500
Vehicle speed signal system <M/T>
P0606
Microcomputer malfunction system <CVT>
P0638*
Throttle valve control servo circuit range/performance problem
P0642*
Throttle position sensor power supply
P0657*
Throttle valve control servo relay circuit malfunction
P1021
Oil control valve system
P1602*
Communication malfunction (between engine-ECU <M/T> or engine-CVT-ECU
<CVT> main processor and system LSI)
P1603*
Battery backup circuit malfunction
P2100*
Throttle valve control servo circuit (open)
P2101*
Throttle valve control servo magneto malfunction
Main
Index
Group
TOC
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI) <4A9>
13A-12
NOTE:
.
•
If the engine warning lamp illuminates because of a malfunction of the engine-ECU <M/T> or
engine-CVT-ECU <CVT>, communication between M.U.T.-III and the engine-ECU <M/T> or
engine-CVT-ECU <CVT> is impossible. In this case, the diagnosis code cannot be read.
•
After the engine-ECU <M/T> or engine-CVT-ECU <CVT> has detected a malfunction, the engine warning
lamp illuminates when the engine is next turned on and the same malfunction is re-detected.However, for
items marked with a "*" in the diagnosis code number column, the engine warning lamp illuminates only
on the first detection of the malfunction.
•
After the engine warning lamp illuminates, it will be switched off under the following conditions.
•
When the engine-ECU <M/T> or engine-CVT-ECU <CVT> monitored the power train malfunction
three times* met set condition requirements, it detected no malfunction.
*: In this case, "one time" indicates from engine start to stop.
•
For misfiring malfunction, when driving conditions (engine speed, engine coolant temperature, etc.)
are similar to those when the malfunction was first recorded.
•
Sensor 1 indicates, the sensor mounted at a position closest to the engine, and sensor 2 indicates the
sensor mounted at the position second closest to the engine.
METHOD OF READING AND ERASING
DIAGNOSIS CODES
Refer to
, GROUP 00
− How to Use Trouble-
shooting/Inspection Service Points
− Diagnosis
Function.
DIAGNOSIS USING DIAGNOSIS 2 MODE
1. Switch the diagnosis mode of the engine control
unit to DIAGNOSIS 2 mode using the M.U.T.-III.
2. Carry out a road test.
3. Take a reading of the diagnosis code and repair
the problem location.
4. Turn the ignition switch to OFF and then back to
ON again.
NOTE: . By turning the ignition switch to OFF, the
engine-ECU <M/T> or engine-CVT-ECU <CVT>
will switch the diagnosis mode from DIAGNOSIS
2 mode to DIAGNOSIS 1 mode.
5. Erase the diagnosis codes.
INSPECTION USING M.U.T.-III DATA LIST
AND ACTUATOR TESTING
1. Carry out inspection by means of the data list and
the actuator test function, if there is an
abnormality, check and repair the chassis harness
and components.
2. After repairing, re-check using the M.U.T.-III and
check that the abnormal input and output have
returned to normal as a result of the repairs.
3. Erase the diagnosis code memory.
4. Remove the M.U.T.-III, and then start the engine
again and carry out a road test to confirm that the
problem has disappeared.
P2108*
Throttle valve control servo processor malfunction
P2122*
Accelerator pedal position sensor (main) circuit low input
P2123*
Accelerator pedal position sensor (main) circuit high input
P2127*
Accelerator pedal position sensor (sub) circuit low input
P2128*
Accelerator pedal position sensor (sub) circuit high input
P2135*
Throttle position sensor (main and sub) range/performance problem
P2138*
Accelerator pedal position sensor (main and sub) range/performance problem
P2226
Barometric pressure sensor system
U1108
Combination meter time-out
Code No.
Diagnosis item
Main
Index
Group
TOC
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI) <4A9>
13A-13
FREEZE FRAME DATA
When the engine-ECU <M/T> or engine-CVT-ECU
<CVT> detects a malfunction and stores a diagnosis
code, it also stores a current status of the engine.
This function is called "Freeze frame data". By ana-
lyzing this "Freeze frame" data with the M.U.T.-III, an
effective troubleshooting can be performed.
The display items of freeze frame data are shown
below.
DISPLAY ITEM LIST
NOTE: If malfunctions have been detected in multiple systems, store one malfunction only, which has been
detected first.
Item No.
Data
Unit
13
Intake air temperature sensor
°C
21
Engine coolant temperature sensor
°C
22
Crank angle sensor
r/min
24
Vehicle speed
km/h
32
Manifold absolute pressure sensor
kPa
44
Ignition advance
deg
81
Long-term fuel compensation
%
82
Short-term fuel compensation
%
87
Calculation load value
%
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
89
Fuel control condition
−
A1
Oxygen sensor (front)
V
A2
Oxygen sensor (rear)
V
Main
Index
Group
TOC
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