Mitsubishi Galant 9G. Manual — part 930
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>
13B-20
OBD- II DRIVE CYCLE
All kinds of diagnostic trouble codes (DTCs) can be monitored by carrying out a short drive according to the
following six drive cycle pattern. In other words, doing such a drive regenerates any kind of trouble which
involves illuminating the Malfunction Indicator Lamp (SERVICE ENGINE SOON or Check Engine Lamp) and
verifies the repair procedure has eliminated [the trouble the Malfunction Indicator Lamp (SERVICE ENGINE
SOON or Check Engine Lamp) is no longer illuminated].
CAUTION
Two technicians should always be in the vehicle when carrying out a test.
NOTE: Check that the diagnosis trouble code (DTC) is not output before driving the OBD-II drive cycle. Erase
the DTC if it has been output.
DRIVE CYCLE PATTERN LIST
.
PROCEDURE
MONITOR ITEM
DIAGNOSTIC TROUBLE
CODE (DTC)
Evaporative emission system leak monitor
P0441, P0442, P0451,
P0452, P0453, P0455,
P0456
Fuel trim monitor
P0171, P0172, P0174,
P0175
Catalytic converter monitor
P0421, P0431
Heated oxygen sensor monitor
P0133, P0139, P0153,
P0159
Exhaust gas recirculation (EGR) system monitor
P0401
Other monitor
Main components
P0106, P0107, P0108,
P0134, P0154, P0300,
P0301, P0302, P0303,
P0304, P0305, P0306,
P0506, P0507
Sensors and switches
P0069, P0101, P0102,
P0103, P0111, P0112,
P0113, P0116, P0117,
P0118, P0125, P0181,
P0182, P0183, P0335,
P0340, P0461, P2066
Wire breakage and short
circuit
P0130, P0131, P0132,
P0135, P0136, P0137,
P0138, P0141, P0150,
P0151, P0152, P0155,
P0156, P0157, P0158,
P0161, P0201, P0202,
P0203, P0204, P0205,
P0206, P0403, P0443,
P0446, P0462, P0463,
P2228, P2229
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>
13B-21
PROCEDURE 1
EVAPORATIVE EMISSION SYSTEM LEAK MONITOR
DTC
P0441, P0442, P0451, P0452, P0453, P0455, P0456
Drive cycle
pattern
This monitor [from start to ignition switch "LOCK" (OFF) position] will be completed while
driving the vehicle with the following drive cycle pattern. It will take 8 minutes. You must
complete this drive twice.
NOTE: Vehicle speed and throttle opening angle should be within the shaded range.
Inspection
conditions
• Engine coolant temperature: 45°C (113°F) or less (The engine is stopped before the test
drive is started)
• Atmospheric temperature: 5 − 45°C (41 − 113°F)
• Condition of A/T: Selector lever D range
AKX01345
AKX01345
(3)
(2)
(1)
(4)
(5)
200 SECONDS
OR MORE
PREPARATION
PERIOD
ENGINE START
IGNITION
SWITCH:
"LOCK" (OFF)
DURING
MONITOR
150 SECONDS
OR MORE
89 - 97 km/h (55 - 60 mph)
97
(60)
64
(40)
32
(20)
0
100
50
0
VEHICLE SPEED
km/h (mph)
AKX01345 AB
CALCULATED
LOAD (%)
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>
13B-22
.
Test
procedure
1. Engine: start
2. Accelerate until the vehicle speed is 89
− 97 km/h (55 − 60 mph).
3. Travel for 200 seconds or more while keeping the vehicle speed at 89
− 97 km/h (55 − 60
mph).
4. While keeping the accelerator pedal opening degree constant, keep the vehicle speed at
89
− 97 km/h (55 − 60 mph) and travel for 150 seconds or more. (During monitor)
5. Return the vehicle to the shop, then turn the ignition switch to "LOCK" (OFF) position.
6. Confirm that the diagnostic trouble code (DTC) is not output.
7. If DTC P0441 is output, refer to DTC P0441
− Evaporative Emission control System
Incorrect Purge Flow
.
If DTC P0442 is output, refer to DTC P0442
− Evaporative Emission control System Leak
.
If DTC P0451 is output, refer to DTC P0451
− Evaporative Emission control System
Pressure Sensor Range/performance
If DTC P0452 is output, refer to DTC P0452
− Evaporative Emission control System
Pressure Sensor Low Input
.
If DTC P0453 is output, refer to DTC P0453
− Evaporative Emission control System
.
If DTC P0455 is output, refer to DTC P0455
− Evaporative Emission control System Leak
Detected (Gross Leak)
.
If DTC P0456 is output, refer to DTC P0456
− Evaporative Emission control System Leak
Detected (Very Small Leak)
EVAPORATIVE EMISSION SYSTEM LEAK MONITOR
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>
13B-23
PROCEDURE 2
.
FUEL TRIM MONITOR
DTC
P0171, P0172, P0174, P0175
Drive cycle
pattern
This monitor [from start to ignition switch "LOCK" (OFF) position] will be completed while
driving the vehicle with the following drive cycle pattern. It will take 35 minutes. You must
complete this drive twice.
NOTE: Vehicle speed and throttle opening angle should be within the shaded range.
Inspection
conditions
• Engine coolant temperature: 80 − 97°C (176 − 207°F)
• Atmospheric temperature: −10 to 60°C (14 − 140°F)
• Condition of A/T: Selector lever D range
Test
procedure
1. Engine: start
2. Accelerate until the vehicle speed is 89
− 97 km/h (55 − 60 mph).
3. Travel for 30 minutes or more while keeping the vehicle speed at 89
− 97 km/h (55 − 60
mph). Carry out one gradual deceleration/acceleration returning to 89
− 97 km/h (55 − 60
mph) within 120 seconds. (During monitor)
4. Return the vehicle to the shop, then turn the ignition switch to "LOCK" (OFF) position.
5. Confirm that the diagnostic trouble code (DTC) is not output.
6. If DTC P0171 is output, refer to DTC P0171
.
If DTC P0172 is output, refer to DTC P0172
If DTC P0174 is output, refer to DTC P0174
.
If DTC P0175 is output, refer to DTC P0175
AKX01346
AKX01346
(3)
(2)
(1)
(4)
30 MINUTES OR MORE
89 - 97 km/h (55 - 60 mph)
WITH 120 SECONDS
ENGINE START
IGNITION SW-
ITCH: "LOCK"
(OFF)
DURING MONITOR
97
(60)
64
(40)
32
(20)
0
100
50
0
VEHICLE SPEED
km/h (mph)
AKX01346 AB
CALCULATED
LOAD (%)
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