Mitsubishi Lancer Evolution X. Manual — part 236
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-9
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TROUBLESHOOTING STRATEGY
M1131150002188
NOTE: If a DTC is erased, its "freeze frame" data will
also be erased and system readiness test status will
be reset. Store the "freeze frame" data before eras-
ing the DTC.
Use these steps to plan your diagnostic strategy. If
you follow them carefully, you will be sure to have
exhausted most of the possible ways to find an MFI
fault.
1. Gather as much information as possible about the
complaint from the customer.
2. Verify that the condition described by the
customer exists.
3. Check the vehicle for any MFI Diagnostic Trouble
Code (DTC).
4. If you cannot verify the condition and there are no
DTCs, the malfunction is intermittent. For
information on how to cope with intermittent
malfunctions, refer to GROUP 00, How to Use
Troubleshooting/Inspection Service Points − How
to Cope with Intermittent Malfunctions
5. If you can verify the condition but there are no
DTCs, or the system cannot communicate with
the scan tool, refer to the trouble symptom
classification table.
6. If there is a DTC, store the number of the code,
then erase the code from the memory using the
scan tool.
7. Reconfirm the malfunction symptom and carry out
a test drive with the drive cycle pattern.
8. If DTC is set again, carry out an inspection with
appropriate diagnostic trouble code procedures.
9. If DTC is not set again, the malfunction is
intermittent. For information on how to cope with
intermittent malfunctions, refer to GROUP 00,
How to Use Troubleshooting/Inspection Service
Points − How to Cope with Intermittent
Malfunctions
10.After repairs are completed, conduct a road test
duplicating the complaint set conditions to confirm
the malfunction has been corrected.
NOTE: If the engine control module (ECM) is
replaced, Immobilizer Encrypted Code Registration
should be carried out, refer to GROUP 42B, ID Code
Registration Necessity Judgment Table <Vehicles
with KOS>
or GROUP 42C, ID Codes
Registration Judgment Table <Vehicles with WCM>
.
DIAGNOSTIC FUNCTION
M1131155503738
.
MALFUNCTION INDICATOR LAMP (SERVICE
ENGINE SOON OR CHECK ENGINE LAMP)
Among the on-board diagnostic items, Malfunction Indicator
Lamp (SERVICE ENGINE SOON or Check Engine Lamp) illu-
minates to notify the driver of an emission control malfunction.
However, when an irregular signal returns to normal and the
engine control module judges that it has returned to normal, the
Malfunction Indicator Lamp (SERVICE ENGINE SOON or
Check Engine Lamp) will switch off.
There are two methods for checking the Malfunction Indicator
Lamp (SERVICE ENGINE SOON or Check Engine Lamp) burn
out: When the ignition switch is in ON position, the Malfunction
Indicator Lamp (SERVICE ENGINE SOON or Check Engine
Lamp) is illuminated, and then extinguished few seconds later.
When the ignition switch is in ON position and the engine
starts, the Malfunction Indicator Lamp (SERVICE ENGINE
SOON or Check Engine Lamp) is extinguished.
NOTE: When the Transmission Control Module (TCM) detects
malfunctions related to the TC-SST, the Malfunction indicator
Lamp (SERVICE ENGINE SOON or Check Engine Lamp) is
also illuminated.
.
AK800001AB
Malfunction
indicator lamp
(SERVICE
ENGINE
SOON or check
engine lamp)
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-10
Items Indicated by the Malfunction Indicator Lamp (SERVICE ENGINE SOON or Check
Engine Lamp)
DTC
ITEM
P0010
Intake engine oil control valve circuit
P0011
Intake variable valve timing system target error
P0013
Exhaust engine oil control valve circuit
P0014
Exhaust variable valve timing system target error
P0016
Crankshaft/camshaft (intake) position sensor phase problem
P0017
Crankshaft/camshaft (exhaust) position sensor phase problem
P0031
Heated oxygen sensor (front) heater circuit low
P0032
Heated oxygen sensor (front) heater circuit high
P0037
Heated oxygen sensor (rear) heater circuit low
P0038
Heated oxygen sensor (rear) heater circuit high
P0069
Abnormal correlation between manifold absolute pressure sensor and barometric pressure
sensor
P0096*
1
Intake air temperature circuit range/performance problem (sensor 2)
P0097*
1
Intake air temperature circuit low input (sensor 2)
P0098*
1
Intake air temperature circuit high input (sensor 2)
P0101*
1
Mass airflow circuit range/performance problem
P0102*
1
Mass airflow circuit low input
P0103*
1
Mass airflow circuit high input
P0106
Manifold absolute pressure circuit range/performance problem
P0107
Manifold absolute pressure circuit low input
P0108
Manifold absolute pressure circuit high input
P0111*
1
Intake air temperature circuit range/performance problem (sensor 1)
P0112*
1
Intake air temperature circuit low input (sensor 1)
P0113*
1
Intake air temperature circuit high input (sensor 1)
P0116*
1
Engine coolant temperature circuit range/performance problem
P0117*
1
Engine coolant temperature circuit low input
P0118*
1
Engine coolant temperature circuit high input
P0122*
1
Throttle position sensor (main) circuit low input
P0123*
1
Throttle position sensor (main) circuit high input
P0125*
1
Insufficient coolant temperature for closed loop fuel control
P0128
Coolant thermostat (coolant temperature below thermostat regulating temperature)
P0131
Heated oxygen sensor (front) circuit low voltage
P0132
Heated oxygen sensor (front) circuit high voltage
P0133
Heated oxygen sensor (front) circuit slow response
P0134*
1
Heated oxygen sensor (front) circuit no activity detected
P0137
Heated oxygen sensor (rear) circuit low voltage
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-11
P0138
Heated oxygen sensor (rear) circuit high voltage
P0139
Heated oxygen sensor (rear) circuit slow response
P0140
Heated oxygen sensor (rear) circuit no activity detected
P0171
System too lean
P0172
System too rich
P0181
Fuel tank temperature sensor circuit range/performance
P0182
Fuel tank temperature sensor circuit low input
P0183
Fuel tank temperature sensor circuit high input
P0201
Injector circuit − cylinder 1
P0202
Injector circuit − cylinder 2
P0203
Injector circuit − cylinder 3
P0204
Injector circuit − cylinder 4
P0222*
1
Throttle position sensor (sub) circuit low input
P0223*
1
Throttle position sensor (sub) circuit high input
P0234
Turbocharger wastegate system malfunction
P0243
Turbocharger wastegate solenoid 1 circuit
P0247
Turbocharger wastegate solenoid 2 circuit
P0300*
2
Random/multiple cylinder misfire detected
P0301*
2
Cylinder 1 misfire detected
P0302*
2
Cylinder 2 misfire detected
P0303*
2
Cylinder 3 misfire detected
P0304*
2
Cylinder 4 misfire detected
P0327
Knock sensor circuit low
P0328
Knock sensor circuit high
P0335*
1
Crankshaft position sensor circuit
P0340*
1
Intake camshaft position sensor circuit
P0365*
1
Exhaust camshaft position sensor circuit
P0420
Warm up catalyst efficiency below threshold
P0441
Evaporative emission control system incorrect purge flow
P0442
Evaporative emission control system leak detected (small leak)
P0443
Evaporative emission control system purge control valve circuit
P0446
Evaporative emission control system vent control circuit
P0450
Evaporative emission control system pressure sensor malfunction
P0451
Evaporative emission control system pressure sensor range/performance
P0452
Evaporative emission control system pressure sensor low input
P0453
Evaporative emission control system pressure sensor high input
P0455
Evaporative emission control system leak detected (gross leak)
P0456
Evaporative emission control system leak detected (very small leak)
DTC
ITEM
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
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MULTIPORT FUEL INJECTION (MFI)
13A-12
P0461
Fuel level sensor (main) circuit range/performance
P0462
Fuel level sensor circuit low input
P0463
Fuel level sensor circuit high input
P0500*
1
Vehicle speed signal malfunction
P0506
Idle control system RPM lower than expected
P0507
Idle control system RPM higher than expected
P050B
Ignition timing retard insufficient
P0551
Power steering pressure switch circuit range/performance
P0554
Power steering pressure switch circuit intermittent
P0603*
1
EEPROM malfunction
P0606*
1
Engine control module main processor malfunction
P0630*
1
Vehicle Identification Number (VIN) malfunction
P0638*
1
Throttle actuator control motor circuit range/performance
P0642*
1
Throttle position sensor power supply
P0657*
1
Throttle actuator control motor relay circuit malfunction
P1233*
1
Throttle position sensor (main) plausibility
P1234*
1
Throttle position sensor (sub) plausibility
P1235*
1
Mass airflow sensor plausibility
P1236*
1
A/D converter
P1237*
1
Accelerator pedal position sensor plausibility
P1238*
1
Mass airflow sensor plausibility (torque monitor)
P1239*
1
Engine RPM plausibility
P1241*
1
Torque monitor
P1506
Idle control system RPM lower than expected at low temperature
P1507
Idle control system RPM higher than expected at low temperature
P1590*
1
TCM to ECM communication error in torque reduction request <TC-SST>
P1603*
1
Battery backup circuit malfunction
P1676*
1
Variant coding
P2066
Fuel level sensor (sub) circuit range/performance
P2096
Post catalyst fuel trim system too lean
P2097
Post catalyst fuel trim system too rich
P2100*
1
Throttle actuator control motor circuit (open)
P2101*
1
Throttle actuator control motor magneto malfunction
P2122*
1
Accelerator pedal position sensor (main) circuit low input
P2123*
1
Accelerator pedal position sensor (main) circuit high input
P2127*
1
Accelerator pedal position sensor (sub) circuit low input
DTC
ITEM
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