DIAGNOSIS SYSTEM


Engine-ECU or engine-A-M/T-ECU has been provided with the following functions for easier system inspection.

FREEZE-FRAME DATA


When determining the malfunction and storing the diagnosis code, the engine-ECU or engine-A-M/T-ECU stores the sensor input status, the control status and so on for each of the diagnosis codes at the time of malfunction detection. This function’s data are called "Freeze Frame" data. The each diagnosis code has two blocks for storing the freeze frame data. The block 1 and 2 store the same data at the first detection. After the engine-ECU or engine-A-M/T-ECU judges the first detected malfunction to have been corrected by change in some circumstances, the malfunction is detected again, whose data the block 2 can store. Whenever this is repeated again, the freeze frame data are updated and stored in the block 2. By analyzing these 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.
Data
 Unit
Intake air temperature sensor
 °C
Engine coolant temperature
 °C
Engine speed (crank angle sensor)
 r/min
Vehicle speed
 km/h
Manifold absolute pressure sensor
 kPa
Ignition advance
 deg
Long-term fuel compensation (long-term fuel trim)
 %
Short-term fuel compensation (short-term fuel trim)
 %
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
Calculated lode value
 %
Throttle position sensor (main)
 %
Frequency counter*
 -
Engine warning lamp distance
 -
Diagnosis code during data recording
 -
note *: When the data in the block 2 is updated, that in the block 1 is also updated.

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
P0011
 Mitsubishi innovative valve timing electronic control (MIVEC) system <135 engine>
 Abnormal MIVEC system
 -
P0105*
 Manifold absolute pressure sensor system
 Open circuit or short-circuit in sensor-related circuits
 ON
P0110*
 Intake air temperature sensor system
 Open circuit or short-circuit in sensor-related circuits
 ON
P0115
 Engine coolant temperature sensor system
 Open circuit or 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
 Short-circuit in sensor-related circuits
 ON
P0125*
 Feedback system monitor
 Oxygen sensor not operating
 ON
P0130
 Oxygen sensor (front) system
 Open circuit or short-circuit in sensor-related circuits
 ON
P0135
 Oxygen sensor heater (front) system
 Open circuit or short-circuit in heater-related circuits
 ON
P0136
 Oxygen sensor (rear) system
 Open circuit or short-circuit in sensor-related circuits
 ON
P0141
 Oxygen sensor heater (rear) system
 Open circuit or short-circuit in heater-related circuits
 ON
P0170
 Abnormal fuel system
 Leanness or richness problem
 ON
P0201
 No. 1 injector system
 Open circuit or short-circuit in injector-related circuits
 ON
P0202
 No. 2 injector system
 Open circuit or short-circuit in injector-related circuits
 ON
P0203
 No. 3 injector system
 Open circuit or short-circuit in injector-related circuits
 ON
P0204
 No. 4 injector system <135 engine>
 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
 Random cylinder misfire detection system
 Abnormal ignition signal (Misfiring)
 ON
P0301
 No. 1 cylinder misfire detection system
 Misfiring
 ON
P0302
 No. 2 cylinder misfire detection system
P0303
 No. 3 cylinder misfire detection system
P0304
 No. 4 cylinder misfire detection system <135 engine>
P0325
 Detonation sensor system
 Abnormal sensor output
 ON
P0335*
 Crank angle sensor system
 Abnormal sensor output
 ON
P0340
 Camshaft position sensor system
 Abnormal sensor output
 ON
P0420
 Catalyst malfunction
 Abnormal exhaust gas purification performance of catalyst
 ON
P0443
 Purge control solenoid valve system
 Open circuit or short-circuit in solenoid valve-related circuits
 ON
P0460
 Fuel level sensor system <FFV>
 Open circuit or short-circuit in sensor-related circuits
 ON
P0461
 Fuel level sensor range/performance problem <FFV>
 Abnormality in fuel level sensor
 ON
P0500
 Vehicle speed signal system
 Open circuit or short-circuit in sensor-related circuits
 ON
P0513
 Immobilizer malfunction
 Open circuit or short-circuit in sensor-related circuits
 ON
P0515
 Battery temperature sensor system <Vehicles with AS&G system>
 Open circuit or short-circuit in sensor-related circuits
 -
P0555
 Brake vacuum sensor system <Vehicles with AS&G system>
 Open circuit or short-circuit in sensor-related circuits
 -
P0603
 EEPROM malfunction
 Abnormality in engine-ECU or engine-A-M/T-ECU
 -
P0606*
 Engine-ECU or engine-A-M/T-ECU main processor malfunction
 Abnormality in engine-ECU or engine-A-M/T-ECU
 ON
P0622
 Alternator FR terminal system
 Open circuit in sensor-related circuits
 -
P0638*
 Throttle valve control servo circuit range/performance problem
 Abnormal throttle valve control servo
 ON
P0657*
 Throttle valve control servo relay circuit malfunction
 Open circuit or short-circuit in sensor-related circuits
 ON
P0817
 Starter cut relay system <Vehicles with AS&G system>
 Short-circuit in relay-related circuits
 -
P0820
 Neutral position sensor system <Vehicles with AS&G system>
 Open circuit or short-circuit in sensor-related circuits
 -
P0830
 Clutch switch (A) system <Vehicles with AS&G system>
 Open circuit or short-circuit in switch-related circuits
 -
P0833
 Clutch switch (B) system <Vehicles with AS&G system>
 Open circuit or short-circuit in switch-related circuits
 -
P1021*
 Oil control valve circuit <135 engine>
 Open circuit or short-circuit in oil control valve-related circuits
 ON
P1231
 Trustful check ASC <Vehicle with ASC>
 Abnormality in ABS/ASC-ECU
 -
P1232
 Fail-safe control system
 Abnormality in engine-ECU or engine-A-M/T-ECU
 -
P1603
 Battery back-up line system
 Open circuit in system-related circuits
 ON
P1608
 Battery current sensor system <Vehicles with AS&G system>
 Open circuit or short-circuit in sensor-related circuits
 -
P1630*
 Variant coding not completed
 After engine-ECU or engine-A-M/T-ECU replacement, the vehicle information is not stored, or the wrong one is stored.
 ON
P1961*
 Trustful check throttle position sensor (main)
 Abnormality in throttle position sensor (main)
 ON
P1962*
 Trustful check throttle position sensor (sub)
 Abnormality in throttle position sensor (sub)
 ON
P1963*
 Trust check manifold absolute pressure sensor
 Abnormality in manifold absolute pressure sensor
 ON
P1964*
 AD converter
 Abnormality in engine-ECU or engine-A-M/T-ECU
 ON
P1965*
 Trustful check accelerator pedal position sensor
 Abnormality in accelerator pedal position sensor
 ON
P1966*
 Manifold absolute pressure sensor trustful for torque monitoring
 Abnormality in manifold absolute pressure sensor
 ON
P1967*
 Trustful check engine speed
 Abnormality in engine-ECU or engine-A-M/T-ECU
 ON
P1968
 Trustful check automated manual transmission <Vehicle with automated manual transmission>
 Abnormality in engine-A-M/T-ECU
 -
P1969
 Trustful check ignition timing <Vehicle with ASC>
 ABS/ASC-ECU
 -
P1970*
 Torque monitoring
 Abnormality in engine-ECU or engine-A-M/T-ECU
 ON
P1971
 Fail-safe control monitoring
 Abnormality in engine-ECU or engine-A-M/T-ECU
 -
P1972
 Inquiry/response error
 Abnormality in engine-ECU or engine-A-M/T-ECU
 -
P1973
 RAM test for all area
 Abnormality in engine-ECU or engine-A-M/T-ECU
 -
P1974
 Cyclic RAM test (engine)
 Abnormality in engine-ECU or engine-A-M/T-ECU
 -
P1975
 Cyclic RAM test (gear), engine-ECU or engine-A-M/T-ECU
 Abnormality in engine-ECU or engine-A-M/T-ECU
 -
P1976
 Cyclic RAM test (clutch), engine-ECU or engine-A-M/T-ECU
 Abnormality in engine-ECU or engine-A-M/T-ECU
 -
P1977
 Communication error
 Abnormality in engine-ECU or engine-A-M/T-ECU
 -
P1978*
 Throttle valve control servo malfunction
 Abnormality in throttle valve control servo
 ON
P2100*
 Throttle valve control servo circuit (open)
 Open circuit in throttle valve control servo-related circuit
 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
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) range/performance problem
 Abnormal sensor output
 ON
P2138*
 Accelerator pedal position sensor (main and sub) range/performance problem
 Abnormal sensor output
 ON
U1073
 Bus off
 Abnormality in CAN bus line
 -
U1102
 ABS-ECU <Vehicle without ASC> or ABS/ASC-ECU <Vehicle with ASC> time-out
 Abnormality in CAN bus line
 -
U1106
 Electric power steering-ECU time-out
 Abnormality in CAN bus line
 -
U1108
 Combination meter time-out
 Abnormality in CAN bus line
 ON
U1109
 ETACS time-out
 Abnormality in CAN bus line
 -
U1110
 A/C-ECU time-out
 Abnormality in CAN bus line
 -
U1112
 SRS time-out
 Abnormality in CAN bus line
 -
-
 Engine-ECU or engine-A-M/T-ECU
 Abnormality in engine-ECU or engine-A-M/T-ECU
 ON
note When the first time a malfunction is detected, the engine-ECU or engine-A-M/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
1
 Alternator G terminal duty
 %
2
 Power supply voltage
 V
3
 Crank angle sensor
 r/min
4
 Target idle speed
 r/min
5
 Vehicle speed
 km/h
6
 Intake air temperature sensor
 °C
7
 Manifold absolute pressure sensor
 kPa
8
 Engine coolant temperature sensor
 °C
9
 Oxygen sensor (front)
 mV
10
 Oxygen sensor (rear)
 mV
11
 Accelerator pedal position sensor (main)
 mV
12
 Accelerator pedal position sensor (sub)
 mV
13
 Throttle position sensor (main)
 mV
14
 Throttle position sensor (sub)
 mV
15
 Ignition advance
 deg
16
 Injectors
 ms
17
 Idle speed control position learned value
 Step
18
 Idle speed control position learned value (A/C load)
 Step
19
 Air-fuel ratio feedback integration
 %
20
 Air-fuel ratio learning value of A zone (Low load)
 %
21
 Air-fuel ratio learning value of B zone (Low speed load)
 %
22
 Knock retard
 °CA
23
 Learned knock retard
 %
24
 Accelerator pedal position sensor (main) learned value (Closed position)
 mV
25
 Oil control valve target current value
 mA
26
 Electric power steering current value (CAN)
 A
27
 Cranking signal (Ignition switch-ST)
 ON/OFF
28
 Purge control solenoid valve duty
 %
29
 MIVEC phase angle
 °CA
30
 MIVEC phase angle target value
 °CA
67
 Idle position switch
 ON/OFF
73
 Starter relay
 ON/OFF
78
 Brake lamp switch (CAN)
 ON/OFF
130
 Fuel control condition
 Closed loop/Open loop-drive condition
131
 Volumetric efficiency
 %
141
 A/C compressor relay
 ON/OFF
150
 AS&G OFF switch <Vehicles with AS&G system>
 ON/OFF
151
 Capacitor relay <Vehicles with AS&G system>
 ON/OFF
152
 Battery deterioration flag <Vehicles with AS&G system>
 ON/OFF
153
 Clutch switch (A) <Vehicles with AS&G system>
 ON/OFF
154
 Clutch switch (B) <Vehicles with AS&G system>
 ON/OFF
155
 Hood buzzer switch <Vehicles with AS&G system>
 Close/Open
156
 Neutral position learning <Vehicles with AS&G system>
 Completed/Not completed
159
 Battery current sensor <Vehicles with AS&G system>
 A
160
 Battery temperature sensor <Vehicles with AS&G system>
 °C
161
 Brake vacuum sensor <Vehicles with AS&G system>
 kPa
162
 Neutral position learned value <Vehicles with AS&G system>
 %
163
 Neutral position sensor <Vehicles with AS&G system>
 %
170
 Ethanol percentage learning <FFV>
 Not completed/ Completed
171
 Fuel level input <FFV>
 %
172
 Type of fuel <FFV>
 Bi-fuel Gasoline/ Bi-fuel Ethanol
173
 Ethanol percentage <FFV>
 %
-
 Mass air flow rate (GST only)
 gm/s
-
 Throttle position sensor (main) (GST only)
 %
-
 Engine warning lamp distance (GST only)
 km

ACTUATOR TEST FUNCTION


The actuator test items are given in the table below
Item No.
 Inspection item
 Drive content
1
 Injector
 Cut off No. 1 injector
2
 Cut off No. 2 injector
3
 Cut off No. 3 injector
4 <135 engine>
 Cut off No. 4 injector
5
 Fuel pump
 Drive fuel pump to circulate fuel
6
 Purge control solenoid valve
 Switch solenoid valve from OFF to ON
7
 Basic ignition timing
 Switch engine-ECU or engine-A-M/T-ECU to ignition timing adjusting mode
8
 Radiator fan (Hi)
 Drive the fan motor at high speed
9
 Radiator fan (Low)
 Drive the fan motor at low speed
10
 Throttle valve control servo
 Stop the throttle valve control servo
13
 A/C compressor relay
 A/C compressor relay turns from OFF to ON
14
 Capacitor relay <Vehicles with AS&G system>
 Capacitor relay turns from OFF to ON