Mitsubishi Grandis. Manual — part 692
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-19
Malfunctioning item
Control contents during malfunction
Air flow sensor
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.
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
(main)
• Controls the throttle valve position through the use of the throttle position sensor
(sub) signal.
• Renders the amount of accelerator pedal travel as being approximately one-half
the normal opening angle.
• Prohibits the operation of the engine speed feedback control.
• Cuts off fuel when the engine speed exceeds 3,000 r/min.
• Suppresses the engine output by stopping the electronic-controlled throttle
valve system if the throttle position sensor (sub) is also malfunctioning.
Throttle position sensor
(sub)
• Controls the throttle valve position through the use of the throttle position sensor
(main) signal.
• Renders the amount of accelerator pedal travel as being approximately one-half
the normal opening angle.
• Cuts off fuel when the engine speed exceeds 3,000 r/min.
• Suppresses the engine output by stopping the electronic-controlled throttle
valve system if the throttle position sensor (main) is also malfunctioning.
Accelerator pedal
position sensor (main)
• Detects the amount of the accelerator pedal travel through the use of the
accelerator pedal position sensor (sub) signal, but rendering it only as being
approximately one-half the normal opening angle.
• Cuts off fuel when the engine speed exceeds 3,000 r/min.
• Suppresses the engine output by stopping the electronic-controlled throttle
valve system if the accelerator pedal position sensor (sub) is also
malfunctioning.
Accelerator pedal
position sensor (sub)
• Detects the amount of the accelerator pedal travel through the use of the
accelerator pedal position sensor (main) signal, but rendering it only as being
approximately one-half the normal opening angle.
• Cuts off fuel when the engine speed exceeds 3,000 r/min.
• Suppresses the engine output by stopping the electronic-controlled throttle
valve system if the accelerator pedal position sensor (main) is also
malfunctioning.
Engine coolant
temperature sensor
Controls as if the engine coolant temperature is 80
°C. (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 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 center is
not detected at all.)
Oxygen sensor <front> Air/fuel ratio closed loop control is not performed.
Oxygen sensor <rear> Performs the closed loop control of the air/fuel ratio by using only the signal of the
oxygen sensor (front) installed on the front side of the catalytic converter.
Detonation sensor
Switches the ignition timing from ignition timing for high octane to ignition timing for
standard octane fuel.
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-20
INSPECTION CHART FOR DIAGNOSIS CODE
M1131151001188
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.
Throttle valve position
feedback
• Suppresses the engine output by stopping the electronic-controlled throttle
valve system.
• Prohibits the operation of the engine speed feedback control.
Throttle valve control
servo
• Suppresses the engine output by stopping the electronic-controlled throttle
valve system.
• Prohibits the operation of the engine speed feedback control.
Engine-ECU <M/T> or
engine-A/T-ECU <A/T>
main processor
• Suppresses the engine output by stopping the electronic-controlled throttle
valve system.
• Prohibits the operation of the engine speed feedback control.
Communication
between powertrain
control module main
processor and system
LSI
• Renders the amount of accelerator pedal travel as being approximately one-half
the normal opening angle.
• Prohibits the operation of the engine speed feedback control.
• Cuts off fuel when the engine speed exceeds 3,000 r/min.
Intake air monitor
• Suppresses the engine output by stopping the electronic-controlled throttle
valve system.
• Prohibits the operation of engine speed feedback.
Oil control valve
• Do not switch to high-speed cam.
• Cut off fuel when the engine speed exceeds 5,000 r/min.
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
P0122*
Throttle position sensor (main) circuit low input
P0123*
Throttle position sensor (main) circuit high input
P0125*
Feedback system monitor
P0130
Cylinder 1, 4 oxygen sensor (front) system
P0135
Cylinder 1, 4 oxygen sensor (front) heater system
P0136
Cylinder 1, 4 oxygen sensor (rear) system
P0141
Cylinder 1, 4 oxygen sensor (rear) heater system
P0150
Cylinder 2, 3 oxygen sensor (front) system
P0155
Cylinder 2, 3 oxygen sensor (front) heater system
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-21
P0156
Cylinder 2, 3 oxygen sensor (rear) system
P0161
Cylinder 2, 3 oxygen sensor (rear) heater system
P0170
Abnormal fuel system (cylinder 1,4)
P0173
Abnormal fuel system (cylinder 2,3)
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
P0421
Warm Up Catalyst Malfunction (cylinder 1,4)
P0431
Warm Up Catalyst Malfunction (cylinder 2,3)
P0443
Purge control solenoid valve system
P0500
Vehicle speed sensor system <M/T>
P0500
Vehicle speed signal system <A/T>
P0505
Idle speed control (ISC) system
P0513
Immobilizer malfunction
P0551*
Power steering fluid pressure sensor system
P0603
EEP ROM malfunction
P0606*
Engine-ECU <M/T> or engine-A/T-ECU <A/T> main processor
malfunction
P0622
Alternator FR terminal system
P0638*
Throttle valve control servo circuit range/performance problem
P0642*
Throttle position sensor power supply
P0657*
Throttle valve control servo relay circuit malfunction
P0705
Inhibitor switch system
• A/T DTC No. 27 (Inhibitor switch
system: open circuit)
• A/T DTC No. 28 (Inhibitor switch
system: short circuit)
Code No.
Diagnosis item
Reference page
TROUBLESHOOTING
MULTIPORT FUEL INJECTION (MPI)
13A-22
P0710
A/T fluid temperature
sensor system
• A/T DTC No. 15 (A/T fluid temperature
sensor system: open circuit)
• A/T DTC No. 16 A/T (fluid temperature
sensor system: short circuit)
P0715*
Input shaft speed sensor
system
• A/T DTC No. 22 (Input shaft speed
sensor system)
P0720*
Output shaft speed
sensor system
• A/T DTC No. 23 (Output shaft speed
sensor system)
P0740*
Torque converter clutch
solenoid valve system
• A/T DTC No. 36 (Torque converter
clutch solenoid valve system)
• A/T DTC No. 52 (Torque converter
clutch system)
P0750*
Low-reverse solenoid
valve system
• A/T DTC No. 31 (Low-reverse solenoid
valve system)
• A/T DTC No. 41, No. 46 (Gear
incorrect ratio)
P0755*
Underdrive solenoid valve
system
• A/T DTC No. 32 (Underdrive solenoid
valve system)
• A/T DTC No. 41, No. 42, No. 43 (Gear
incorrect ratio)
P0760*
Second solenoid valve
system
• A/T DTC No. 33 (Second solenoid
valve system)
• A/T DTC No. 42, No. 44 (Gear
incorrect ratio)
P0765*
Overdrive solenoid valve
system
• A/T DTC No. 34 (Overdrive solenoid
valve system)
• A/T DTC No. 43, No. 44 (Gear
incorrect ratio)
P1021
Oil control valve circuit
P1602*
Communication malfunction (between engine-ECU <M/T> or
engine-A/T-ECU <A/T> main processor and system LSI)
P1603*
Battery backup circuit malfunction
P1751*
A/T control relay system
• A/T DTC No. 54 (A/T control relay
system)
P2100*
Throttle valve control servo circuit (open)
P2101*
Throttle valve control servo magneto malfunction
P2102*
Throttle valve control servo circuit (shorted low)
P2103*
Throttle valve control servo circuit (shorted high)
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
Code No.
Diagnosis item
Reference page
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