Mitsubishi Montero Sport (2004+). Manual — part 153
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-25
FAIL-SAFE/BACKUP FUNCTION TABLE
M1131153000307
When the main sensor malfunctions are detected by the diagnostic test mode, the vehicle is controlled by
means of the following defaults.
MALFUNCTION ITEM
DEFAULT VALUES DURING MALFUNCTIONS
Volume airflow sensor
1. Uses the throttle position sensor signal and engine speed signal (crankshaft
position sensor signal) for basic injector drive time and basic ignition timing
from the pre-set mapping.
2. Fixes the IAC motor in the appointed position so idle air control is not
performed.
Intake air temperature
sensor
Controls as if the intake air temperature is 25
°C (77°F).
Throttle position sensor
No increase in fuel injection amount during acceleration due to the unreliable
throttle position sensor signal.
Engine coolant
temperature sensor
Controls as if the engine coolant temperature is 80
°C (176°F). (This control will
be continued until the ignition switch is turned to the "LOCK" (OFF) position
even though the sensor signal returns to normal.)
Camshaft position sensor Injects fuel simultaneously into all cylinders. (After the ignition switch is turned to
the "ON" position, the No.1 cylinder top dead center is not detected at all.)
Barometric pressure
sensor
Controls as if the barometric pressure is 101 kPa (30 in Hg).
Heated oxygen sensor
<front>
Air/fuel ratio closed loop control is not performed.
Heated oxygen sensor
<rear>
Performs the closed loop control of the air/fuel ratio by using only the signal of
the heated oxygen sensor (front) installed on the front side of the catalytic
converter.
Misfire detection
The PCM stops supplying fuel to the cylinder with the highest misfiring rate if a
misfiring that could damage the catalytic converter is detected.
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-26
DIAGNOSTIC TROUBLE CODE CHART
M1131151000754
DTC CODE
DIAGNOSTIC ITEMS
REFERENCE
PAGE
P0101*
Volume airflow circuit range/performance problem
P0102*
Volume airflow circuit low input
P0106
Manifold absolute pressure circuit range/performance problem
P0107
Manifold absolute pressure circuit low input
P0108
Manifold absolute pressure circuit high input
P0111*
Intake air temperature circuit range/performance problem
P0112*
Intake air temperature circuit low input
P0113*
Intake air temperature circuit high input
P0116*
Engine coolant temperature circuit range/performance problem
P0117*
Engine coolant temperature circuit low input
P0118*
Engine coolant temperature circuit high input
P0121*
Throttle position sensor circuit range/performance problem
P0122*
Throttle position sensor circuit low input
P0123*
Throttle position sensor circuit high input
P0125*
Insufficient coolant temperature for closed loop fuel control
P0128
Coolant thermostat (coolant temperature below thermostat regulating
temperature)
P0130
Heated oxygen sensor circuit (bank 1 sensor 1)
P0131
Heated oxygen sensor circuit low voltage (bank 1 sensor 1)
P0132
Heated oxygen sensor circuit high voltage (bank 1 sensor 1)
P0133
Heated oxygen sensor circuit slow response (bank 1 sensor 1)
P0134*
Heated oxygen sensor circuit no activity detected (bank 1 sensor 1)
P0135
Heated oxygen sensor heater circuit (bank 1 sensor 1)
P0136
Heated oxygen sensor circuit (bank 1 sensor 2)
P0137
Heated oxygen sensor circuit low voltage (bank 1 sensor 2)
P0138
Heated oxygen sensor circuit high voltage (bank 1 sensor 2)
P0139
Heated oxygen sensor circuit slow response (bank 1 sensor 2)
P0141
Heated oxygen sensor heater circuit (bank 1 sensor 2)
P0150
Heated oxygen sensor circuit (bank 2 sensor 1)
P0151
Heated oxygen sensor circuit low voltage (bank 2 sensor 1)
P0152
Heated oxygen sensor circuit high voltage (bank 2 sensor 1)
P0153
Heated oxygen sensor circuit slow response (bank 2 sensor 1)
P0154*
Heated oxygen sensor circuit no activity detected (bank 2 sensor 1)
P0155
Heated oxygen sensor heater circuit (bank 2 sensor 1)
P0156
Heated oxygen sensor circuit (bank 2 sensor 2)
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-27
P0157
Heated oxygen sensor circuit low voltage (bank 2 sensor 2)
P0158
Heated oxygen sensor circuit high voltage (bank 2 sensor 2)
P0159
Heated oxygen sensor circuit slow response (bank 2 sensor 2)
P0161
Heated oxygen sensor heater circuit (bank 2 sensor 2)
P0171
System too lean (bank 1)
P0172
System too rich (bank 1)
P0174
System too lean (bank 2)
P0175
System too rich (bank 2)
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
P0205
Injector circuit
−Cylinder 5
P0206
Injector circuit
−Cylinder 6
P0300
Random/multiple cylinder misfire detected
P0301
Cylinder 1 misfire detected
P0302
Cylinder 2 misfire detected
P0303
Cylinder 3 misfire detected
P0304
Cylinder 4 misfire detected
P0305
Cylinder 5 misfire detected
P0306
Cylinder 6 misfire detected
P0335*
Crankshaft position sensor circuit
P0340*
Camshaft position sensor circuit
P0401
EGR flow insufficient detected
P0403
EGR control circuit
P0421
Warm up catalyst efficiency below threshold (bank 1)
P0431
Warm up catalyst efficiency below threshold (bank 2)
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
P0451
Evaporative emission control system pressure sensor range/performance
P0452
Evaporative emission control system pressure sensor low input
DTC CODE
DIAGNOSTIC ITEMS
REFERENCE
PAGE
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-28
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)
P0461
Fuel level sensor circuit range/performance
P0506
Idle control system RPM lower than expected
P0507
Idle control system RPM higher than expected
P0513
Immobilizer malfunction
P0551
Power steering pressure sensor circuit range/performance
P0554
Power steering pressure sensor circuit intermittent
P0705
Transmission range
switch circuit malfunction
(PRNDL input)
• A/T DTC No. 27 (Transmission range switch
system: Open circuit)
• A/T DTC No. 28 (Transmission range switch
system: Short circuit)
P0712
Transmission fluid
temperature sensor low
input
• A/T DTC No. 16 (Oil temperature sensor
system: Short circuit)
P0713
Transmission fluid
temperature sensor high
input
• A/T DTC No. 15 (Oil temperature sensor
system: Open circuit)
P0715
Input/turbine speed
sensor circuit
• A/T DTC No. 22 (Input shaft speed sensor
system: Short circuit/Open circuit)
P0720
Output speed sensor
circuit
• A/T DTC No. 23 (Output shaft speed sensor
system: Short circuit/Open circuit)
P0731
Gear 1 incorrect
• A/T DTC No. 41 (1st gear incorrect ratio)
P0732
Gear 2 incorrect
• A/T DTC No. 42 (2nd gear incorrect ratio)
P0733
Gear 3 incorrect
• A/T DTC No. 43 (3rd gear incorrect ratio)
P0734
Gear 4 incorrect
• A/T DTC No. 44 (4th gear incorrect ratio)
P0736
Gear R incorrect
• A/T DTC No. 46 (Reverse gear incorrect
ratio)
P0741
Torque converter clutch
circuit performance or
stuck off
• A/T DTC No.52 (Torque converter clutch
solenoid system: Defective system)
P0742
Torque converter clutch
circuit stuck on
• A/T DTC No. 53 (Torque converter clutch
solenoid system: Lock-up stuck on)
P0743
Torque converter clutch
circuit electrical
• A/T DTC No. 36 (Torque converter clutch
solenoid system: Short circuit/Open circuit)
P0753
Shift solenoid "A"
electrical
• A/T DTC No. 31 (Low and reverse solenoid
valve system: Short circuit/Open circuit)
P0758
Shift solenoid "B"
electrical
• A/T DTC No. 32 (Underdrive solenoid valve
system: Short circuit/Open circuit)
P0763
Shift solenoid "C"
electrical
• A/T DTC No. 33 (Second solenoid valve
system: Short circuit/Open circuit)
DTC CODE
DIAGNOSTIC ITEMS
REFERENCE
PAGE
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