Mitsubishi Galant 9G. Manual - part 645

 

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Mitsubishi Galant 9G. Manual - part 645

 

 

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-22

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) <2.4L ENGINE>

13A-23

.

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 

P.13A-606

.

If DTC P0442 is output, refer to DTC P0442 

− Evaporative Emission Control System Leak 

Detected (Small Leak) 

P.13A-611

.

If DTC P0451 is output, refer to DTC P0451 

− Evaporative Emission Control System 

Pressure Sensor Range/performance 

P.13A-669

.

If DTC P0452 is output, refer to DTC P0452 

− Evaporative Emission Control System 

Pressure Sensor Low Input 

P.13A-690

.

If DTC P0453 is output, refer to DTC P0453 

− Evaporative Emission Control System 

Pressure Sensor High Input 

P.13A-711

.

If DTC P0455 is output, refer to DTC P0455 

− Evaporative Emission Control System Leak 

Detected (Gross Leak) 

P.13A-732

.

If DTC P0456 is output, refer to DTC P0456 

− Evaporative Emission Control System Leak 

Detected (Very Small Leak) 

P.13A-749

.

EVAPORATIVE EMISSION SYSTEM LEAK MONITOR

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-24

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 

− System too lean (cylinder 1, 4) 

P.13A-406

.

If DTC P0172 is output, refer to DTC P0172 

− System too rich (cylinder 1, 4) 

P.13A-415

.

If DTC P0174 is output, refer to DTC P0174 

− System too lean (cylinder 2, 3) 

P.13A-421

.

If DTC P0175 is output, refer to DTC P0175 

− System too rich (cylinder 2, 3) 

P.13A-430

.

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 (%)

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-25

PROCEDURE 3

CATALYTIC CONVERTER MONITOR
DTC

P0421, P0431

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 20 minutes. You must 
complete this drive twice.
NOTE: Vehicle speed and throttle opening angle should be within the shaded range.

Inspection 
conditions

• Atmospheric temperature: −10°C (14°F) or more

• A/C switch: OFF

• Condition of A/T: Selector lever D range

Test 
procedure

1. Engine: start

2. Accelerate until the vehicle speed is 72 km/h (45 mph).
3. Travel for 300 seconds or more while keeping the vehicle speed at 72 

− 97 km/h (45 − 60 mph).

4. Decelerate until the vehicle speed is within 56 

− 64 km/h (35 − 40 mph).

5. While keeping the accelerator pedal opening degree constant, keep the vehicle speed at 56 

− 64 

km/h (35 

− 40 mph) and travel for 90 seconds or more. (During monitor)

6. Fully close the throttle and decelerate, and keep the deceleration state for 10 seconds. Then, 

quickly accelerate until the vehicle speed reaches 56 

− 64 km/h (35 − 40 mph). Then, repeat steps 

5 and 6, and complete six monitor sessions.

7. Return the vehicle to the shop, then turn the ignition switch to "LOCK" (OFF) position.

8. Confirm that the diagnostic trouble code (DTC) is not output.
9. If DTC P0421 is output, refer to DTC P0421 

− Warm Up Catalyst Efficiency Below Threshold 

(cylinder 1,  4) 

P.13A-598

.

If DTC P0431 is output, refer to DTC P0431 

− Warm Up Catalyst Efficiency Below Threshold 

(cylinder 2,  3) 

P.13A-602

.

AKX01347

(3)

(2)

(1)

(4)

(5)

(5)

(6)

(6)

(6)

(5)

(5)

(7)

300 SECONDS OR MORE
72 - 97 km/h (45 - 60 mph)

PREPARATION
PERIOD

ENGINE 
START

IGNITION 
SWITCH: 
"LOCK"
(OFF)

1 ST
MON-
ITOR

FULL
DECEL-
ERATION

FULL
DECEL-
ERATION

FULL
DECEL-
ERATION

2 ND
MON-
ITOR

6 TH
MON-
ITOR

90 SECONDS OR MORE

56 - 64 km/h (35 - 40 mph)

97
(60)

64
(40)

32
(20)

0

100

50

0

VEHICLE 
SPEED
km/h (mph)

AKX01347AB

CALCULATED
LOAD (%)

 

 

 

 

 

 

 

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