[13C] MULTIPOINT FUEL INJECTION (MPI) <4G69> - - DIAGNOSIS SYSTEMPRINT PAGE / INDEX / PRIOR / NEXT
DIAGNOSIS SYSTEM
Engine-A/T-ECU has been provided with the following functions for easier system inspection.
FREEZE-FRAME DATA
When the engine-A/T-ECU detects a problem and stores the resulting diagnosis code, the engine condition at that time is also memorized. The MUT-II/ III can then be used to analyze this data in order to increase the effectiveness of troubleshooting. The freeze-frame data display items are given below.
Item No.
 Data
 Unit
21
 Engine coolant temperature
 °C
22
 Engine speed
 r/min
24
 Vehicle speed
 km/h
80
 Long-term fuel compensation (long-term fuel trim)
 %
82
 Short-term fuel compensation (short-term fuel trim)
 %
88
 Fuel control condition
 Open loop
Closed loop
Open loop owing to drive condition
Open loop owing to system malfunction
Closed loop based on one oxygen sensor
97
 Calculated lode value
 %

DIAGNOSIS CODE
The diagnosis and engine warning lamp items are given in the table below.
Code No.
 Diagnosis item
 Main diagnosis contents
 Engine warning lamp
P0100
 Air flow sensor system
 Open circuit or short-circuit in sensor-related circuits
 ON
P0105
 Manifold absolute pressure sensor system <Vehicles for Hong kong>
 Open circuit or short-circuit in sensor-related circuits
 ON
P0105
 Barometric pressure sensor system <Vehicles except for Hong kong>
 Abnormality engine-A/T-ECU
 ON
P0110
 Intake air temperature sensor system
 Open circuit in sensor-related circuits
 ON
P0115
 Engine coolant temperature sensor system
 Short-circuit in sensor-related circuits
 ON
P0122*
 Throttle position sensor (main) circuit low input
 Open circuit or short-circuit in sensor-related circuits
 ON
P0123*
 Throttle position sensor (main) circuit high input
 Open circuit in sensor-related circuits
 ON
P0125*
 Insufficient coolant temperature for closed loop fuel control <Vehicles for Hong kong>
 Oxygen sensor not operating
 ON
P0130
 Cylinder 1, 4 oxygen sensor (front) circuit <Vehicles for Hong kong>
 Abnormal sensor output
 ON
P0135
 Cylinder 1, 4 oxygen sensor (front) heater circuit <Vehicles for Hong kong>
 Open circuit or short-circuit in heater-related circuits
 ON
P0136
 Cylinder 1, 4 oxygen sensor (rear) circuit <Vehicles for Hong kong>
 Abnormal sensor output
 ON
P0141
 Cylinder 1, 4 oxygen sensor (rear) heater circuit <Vehicles for Hong kong>
 Open circuit or short-circuit in sensor-related circuits
 ON
P0150
 Cylinder 2, 3 oxygen sensor (front) circuit <Vehicles for Hong kong>
 Abnormal sensor output
 ON
P0155
 Cylinder 2, 3 oxygen sensor (front) heater circuit <Vehicles for Hong kong>
 Open circuit or short-circuit in heater-related circuits
 ON
P0156
 Cylinder 2, 3 oxygen sensor (rear) circuit <Vehicles for Hong kong>
 Abnormal sensor output
 ON
P0161
 Cylinder 2, 3 oxygen sensor (rear) heater circuit <Vehicles for Hong kong>
 Open circuit or short-circuit in heater-related circuits
 ON
P0170
 Abnormal fuel system (cylinder 1, 4) <Vehicles for Hong kong>
 Abnormal sensor output
 ON
P0173
 Abnormal fuel system (cylinder 2, 3) <Vehicles for Hong kong>
 Abnormal sensor output
 ON
P0201
 No. 1 injector circuit
 Open circuit or short-circuit in injector-related circuits
 ON
P0202
 No. 2 injector circuit
 Open circuit or short-circuit in injector-related circuits
 ON
P0203
 No. 3 injector circuit
 Open circuit or short-circuit in injector-related circuits
 ON
P0204
 No. 4 injector circuit
 Open circuit or short-circuit in injector-related circuits
 ON
P0222*
 Throttle position sensor (sub) circuit low input
 Open circuit or short-circuit in sensor-related circuits
 ON
P0223*
 Throttle position sensor (sub) circuit high input
 Open circuit in sensor-related circuits
 ON
P0300
 Ignition coil (power transistor) system
Abnormal ignition signal (Mis-firing)
 ON
P0300
 Random / multiple cylinder mis-fire detected <Vehicles for Hong kong>
 Abnormal ignition signal (Mis-firing)
 ON
P0301
 No. 1 cylinder mis-fire detected <Vehicles for Hong kong>
 Mis-firing
 ON
P0302
 No. 2 cylinder mis-fire detected <Vehicles for Hong kong>
P0303
 No. 3 cylinder mis-fire detected <Vehicles for Hong kong>
P0304
 No. 4 cylinder mis-fire detected <Vehicles for Hong kong>
P0325
 Detonation sensor circuit
 Abnormal sensor output
 ON
P0335*
 Crank angle sensor circuit
 Abnormal sensor output
 ON
P0340*
 Camshaft position sensor circuit
 Abnormal sensor output
 ON
P0403
 Exhaust gas recirculation (EGR) control circuit <Vehicles for Hong kong>
 Open circuit or short-circuit in solenoid valve-related circuits
 ON
P0421
 Warm up catalyst malfunction (cylinder 1, 4) <Vehicles for Hong kong>
 Abnormal exhaust gas purification performance of catalyst
 ON
P0431
 Warm up catalyst malfunction (cylinder 2, 3) <Vehicles for Hong kong>
 Abnormal exhaust gas purification performance of catalyst
 ON
P0443
 Evaporative emission system purge control valve circuit <Vehicles for Hong kong>
 Open circuit or short-circuit in solenoid valve-related circuits
 ON
P0500
 Vehicles speed signal system
Abnormal sensor output
 ON
P0505
 Idle speed control (ISC) system <Vehicles for Hong kong>
 Intake system vacuum leak
 ON
P0513
 Immobilizer malfunction <Vehicles for GCC, Australia and South africa>
 Open circuit or short-circuit in system-related circuits
 ON
P0551*
 Power steering fluid pressure switch circuit intermittent <Vehicles for Hong kong>
 Open circuit or short-circuit in system-related circuits
 ON
P0554
 Power steering fluid pressure switch circuit range/performance <Vehicles for Hong kong>
 Abnormal power steering switch
 ON
P0603
 EEPROM
 Abnormality in engine-A/T-ECU
 ON
P0606*
 Powertrain control module main processor malfunction <Vehicles except for Hong kong>
 Abnormality in engine-A/T-ECU
 ON
P0622
 Alternator FR terminal circuit malfunction
 Open circuit or short-circuit in system-related circuits
 ON
P0638*
 Throttle valve control servo circuit range/performance problem
 Abnormal throttle valve control servo
 ON
P0642*
 Throttle position sensor power supply
 Abnormality in engine-A/T-ECU
 ON
P0657*
 Throttle valve control servo relay circuit malfunction
 Open circuit or short-circuit in sensor-related circuits
 ON
P1021
 Oil control valve circuit
 Open circuit or short-circuit in solenoid valve-related circuits
 ON
P1602*
 Communication Malfunction (between engine-A/T-ECU and Throttle Actuator Control Module)
 Abnormality in engine-ECU
 ON
P1603*
 Battery back-up circuit malfunction <Vehicles for Hong kong>
 Open circuit or short-circuit in system-related circuits
 ON
P2100*
 Throttle valve control servo circuit (open)
 Open circuit in system-related circuits
 ON
P2101*
 Throttle valve control servo magneto malfunction
 Short-circuit in system-related circuits
 ON
P2102*
 Throttle valve control servo circuit (shorted low)
 Short-circuit in system-related circuits
 ON
P2103*
 Throttle valve control servo circuit (shorted high)
 Short-circuit in system-related circuits
 ON
P2121*
 Accelerator pedal position sensor (main) circuit range/performance problem <Vehicles except for Australia and South africa>
 Abnormal sensor output
 ON
P2122*
 Accelerator pedal position sensor (main) circuit low input
 Open circuit or short-circuit in sensor-related circuits
 ON
P2123*
 Accelerator pedal position sensor (main) circuit high input
 Open circuit in sensor-related circuits
 ON
P2126
 Accelerator pedal position sensor (main) circuit range/performance problem <Vehicles except for Australia and South africa>
 Abnormal sensor output
 ON
P2127*
 Accelerator pedal position sensor (sub) circuit low input
 Open circuit or short-circuit in sensor-related circuits
 ON
P2128*
 Accelerator pedal position sensor (sub) circuit high input
 Open circuit in sensor-related circuits
 ON
P2135*
 Throttle position sensor (main and sub) circuit range/performance problem
 Abnormal sensor output
 ON
P2138*
 Accelerator pedal position sensor (main and sub) circuit range/performance problem
 Abnormal sensor output
 ON
P2173*
 Abnormal intake air amount
 Abnormal sensor output
 ON

NOTE: When the first time a malfunction is detected, the engine-A/T-ECU does not store a fault code. However, if the same malfunction is again detected the next time the engine is operated, a fault code is stored. For systems or components marked with "*" to be diagnosed, when the first time a malfunction is detected, a fault code is stored and the engine warning lamp is illuminated.
DATA LIST FUNCTION
The data list items are given in the table below
Item No.
 Inspection item
 Unit
11
 Cylinder 1, 4 oxygen sensor (front) <Vehicles for Hong kong>
 mV
12
 Air flow sensor
 g/s
13
 Intake air temperature sensor
 °C
14
 Throttle position sensor (sub)
 mV
16
 Power supply voltage
 V
18
 Cranking signal (ignition switch-ST)
 ON/OFF
21
 Engine coolant temperature sensor
 °C
22
 Crank angle sensor
 r/min
25
 Barometric pressure sensor
 kPa
26
 Idle position switch
 ON/OFF
27
 Power steering fluid pressure switch
 ON/OFF
28
 A/C switch
 ON/OFF
28
 A/C switch
 ON/OFF
37
 Volumetric efficiency
 %
39
 Cylinder 2, 3 oxygen sensor (front) <Vehicles for Hong kong>
 mV
41
 Injectors
 ms
44
 Ignition advance
 °BTDC
49
 A/C relay
 ON/OFF
59
 Cylinder 1, 4 oxygen sensor (rear) <Vehicles for Hong kong>
 mV
68
 EGR valve
 STEP
69
 Cylinder 2, 3 oxygen sensor (rear) <Vehicles for Hong kong>
 mV
77
 Accelerator pedal position sensor (sub)
 mV
78
 Accelerator pedal position sensor (main)
 mV
79
 Throttle position sensor (main)
 mV
95
 Manifold absolute pressure sensor
 kPa
9A
 Throttle position sensor (main) mid opening learning valve
 mV
12*
 Air flow sensor <Vehicles for Hong kong>
 gm/s
13*
 Intake air temperature sensor <Vehicles for Hong kong>
 °C
21*
 Engine coolant temperature sensor <Vehicles for Hong kong>
 °C
22*
 Crank angle sensor <Vehicles for Hong kong>
 r/min
24*
 Vehicle speed sensor <Vehicles for Hong kong>
 km/h
44*
 Ignition advance <Vehicles for Hong kong>
 deg
81*
 Long-term fuel compensation on (No.1, No.4 cylinder) <Vehicles for Hong kong>
 %
82*
 Short-term fuel compensation on (No.1, No.4 cylinder) <Vehicles for Hong kong>
 %
83*
 Long-term fuel compensation on (No.2, No.3 cylinder) <Vehicles for Hong kong>
 %
84*
 Short-term fuel compensation on (No.2, No.3 cylinder) <Vehicles for Hong kong>
 %
87*
 Calculated load valve <Vehicles for Hong kong>
 %
88*
 Fuel control condition on (No.1, No.4 cylinder) <Vehicles for Hong kong>
 Closed loop/Open loop - drive condition
89*
 Fuel control condition on (No.2, No.3 cylinder) <Vehicles for Hong kong>
 Closed loop/Open loop - drive condition
8A*
 Throttle position sensor (main) <Vehicles for Hong kong>
 %
95*
 Manifold absolute pressure sensor <Vehicles for Hong kong>
 kPa
A1*
 Cylinder 1, 4 oxygen sensor (front) <Vehicles for Hong kong>
 V
A2*
 Cylinder 1, 4 oxygen sensor (rear) <Vehicles for Hong kong>
 V
A3*
 Cylinder 2, 3 oxygen sensor (front) <Vehicles for Hong kong>
 V
A4*
 Cylinder 2, 3 oxygen sensor (rear) <Vehicles for Hong kong>
 V

NOTE: Items marked "*" will not appear if a data list is selected in the check mode.
ACTUATOR TEST FUNCTION
The actuator test items are given in the table below
Item No.
 Inspection item
 Drive contents
01
 Injectors
 Cut fuel to No.1 injector
02
 Cut fuel to No.2 injector
03
 Cut fuel to No.3 injector
04
 Cut fuel to No.4 injector
07
 Fuel pump
 Fuel pump operates and fuel is recirculated
08
 Purge control solenoid valve
 Solenoid valve turns from OFF to ON
17
 Basic ignition timing
 Set to ignition adjustment mode
21
 Fan controller
 Drive the fan motor
22
 Oil control valve
 Oil control valve turns from OFF the ON
34
 Electronic-controlled throttle valve system
 Stop the throttle valve control servo

[13C] MULTIPOINT FUEL INJECTION (MPI) <4G69> - - DIAGNOSIS SYSTEMPRINT PAGE / INDEX / PRIOR / NEXT
©2004 Mitsubishi Motors Corporation