Mitsubishi Galant. Manual - part 83

MULTIPORT FUEL INJECTION(MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-13

PROCEDURE 1

EVAPORATIVE EMISSION CONTROL SYSTEM LEAK MONITOR

DTC

P0442, P0450,P0451, P0455

Drive  cycle 
pattern

This monitor [from start to ignition switch to the "LOCK" (OFF) position] will be completed while traveling 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

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 P0442 is output, refer to DTC P0442 

−

 Evaporative Emission Control System Leak Detected

P.13A-

197

.

If DTC P0450 is output, refer to DTC P0450 

−

 Evaporative Emission Control System Pressure Sensor 

Malfunction

P.13A-221

.

If DTC P0451 is output, refer to DTC P0451 

−

 Evaporative Emission Control System Pressure Sensor Range/

performance

P.13A-234

.

If DTC P0455 is output, refer to DTC P0455 

−

 Evaporative Emission Control System Leak Detected (Gross 

Leak)

P.13A-248

.

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)

<REFERENCE>
THROTTLE
OPENING
ANGLE (%)

AKX01345 AB

MULTIPORT FUEL INJECTION(MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-14

PROCEDURE 2

FUEL TRIM MONITOR

DTC

P0171,P0172

Drive  cycle 
pattern

This monitor [from start to ignition switch to the "LOCK" (OFF) position] will be completed 
while traveling 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 

−

 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.

If DTC P0171 is output, refer to DTC P0171 

−

 System too lean (Bank1)

P.13A-144

 .If DTC 

P0172 is output, refer to DTC P0171 

−

 System too rich (Bank1)

P.13A-150

.

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)

<REFERENCE>
THROTTLE
OPENING
ANGLE (%)

AKX01346 AB

MULTIPORT FUEL INJECTION(MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-15

PROCEDURE 3

CATALYTIC CONVERTER MONITOR

DTC

P0421

Drive  cycle 
pattern

This monitor [from start to ignition switch to the "LOCK" (OFF) position] will be completed while 
traveling 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

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

−

 97 km/h (45 - 60 mph).

Decelerate until the vehicle speed is within 56 

−

 64 km/h (35 

−

 40 mph).

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)

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.

Return the vehicle to the shop, then turn the ignition switch to "LOCK" (OFF) position.
Confirm that the diagnostic trouble code (DTC) is not output.
If DTC P0421 is output, refer to DTC P0421 

−

 Warm Up Catalyst Efficiency Below Threshold (Bank 

1)

P.13A-194

.

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)

<REFERENCE>
THROTTLE
OPENING
ANGLE (%)

AKX01347AB

MULTIPORT FUEL INJECTION(MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-16

PROCEDURE 4

HEATED OXYGEN SENSOR MONITOR

DTC

P0130,P0133,P0136,P0139

Drive  cycle 
pattern

This monitor [from start to ignition switch to the "LOCK" (OFF) position] will be completed while 
traveling with the following drive cycle pattern. It will take 5 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

°

 C (176

°

 F) or more

•

Atmospheric temperature: -10

°

 C (14

°

 F) or more

•

Condition of A/T: Selector lever D range

Test procedure

Engine: start
Accelerate until the vehicle speed is 56 

−

 64 km/h (35 

−

 40 mph).

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

−

 64 km/

h (35 

−

 40 mph) and travel for 120 seconds or more. (During monitor)

 Return the vehicle to the shop, then turn the ignition switch  to "LOCK" (OFF) position.
Confirm that the diagnostic trouble code (DTC) is not output.
 If DTC P0130 is output, refer to DTC P0130 

−

 O

2

 Sensor Circuit Malfunction (Bank 1 Sensor 1) 

P.13A-105

.

 If DTC P0133 is output, refer to DTC P0133 

−

 O

2

 Sensor Circuit Slow Responce (Bank 1 Sensor 

1) 

P.13A-113

.

If DTC P0136 is output, refer to DTC P0136 

−

 O

2

 Sensor Circuit Malfunction (Bank 1 Sensor 

2)

P.13A-127

.

 If DTC P0139 is output, refer to DTC P0139 

−

 O

2

 Sensor Circuit Slow Responce (Bank 1 Sensor 

2) 

P.13A-135

.

AKX01348

AKX01348

(3)

(2)

(1)

(4)

120 SECONDS OR MORE
 56 - 64 km/h (35 - 40 mph)

ENGINE 
START

IGNITION 
SWITCH: "LOCK"
(OFF)

DURING MONITOR

97
(60)

64
(40)

32
(20)

0

100

50

0

VEHICLE SPEED
km/h (mph)

<REFERENCE>
THROTTLE
OPENING
ANGLE (%)

AKX01348 AB