Mitsubishi Galant. Manual - part 197

MULTIPORT FUEL INJECTION(MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-13

PROCEDURE 3

CATALYTIC CONVERTER MONITOR

DTC

P0421, P0431

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

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 monitoring sessions.

7. Return the vehicle to the shop, then turn the ignition switch to the "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 (Bank 1)

P.13B-

264

.

If DTC P0431 is output, refer to DTC P0431 

−

 Warm Up Catalyst Efficiency Below Threshold (Bank 2)

P.13B-

266

.

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) <3.0L>

13B-14

PROCEDURE 4

HEATED OXYGEN SENSOR MONITOR

DTC

P0130,P0133,P0136,P0139,P0150,P0153,P0156,P0159

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 the "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.13B-107

.

If DTC P0133 is output,refer to DTC P0133 

−

 O

2

 Sensor Circuit Slow Responce (Bank 1 Sensor 1)

P.13B-116

.

If DTC P0136 is output,refer to DTC P0136 

−

 O

2

 Sensor Circuit Malfunction (Bank 1 Sensor 2)

P.13B-132

.

If DTC P0139 is output,refer to DTC P0139 

−

 O

2

 Sensor Circuit Slow Responce (Bank 1 Sensor 2)

P.13B-116

.

If DTC P0150 is output, refer to  DTC P0150 

−

 O

2

  Sensor Circuit Malfunction (Bank 2 Sensor 1)

P.13B-151

.

If DTC P0153 is output,refer to DTC P0153 

−

 O

2

 Sensor Circuit Slow Responce (Bank 2 Sensor 1)

P.13B-159

.

If DTC P0156 is output, refer to DTC P0156 

−

 O

2

 Sensor Circuit Malfunction (Bank 2 Sensor 2)

P.13B-174

.

If DTC P0159 is output,refer to DTC P0159 

−

 O

2

 Sensor Circuit Slow Responce (Bank 2 Sensor 2)

P.13B-182

.

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

MULTIPORT FUEL INJECTION(MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-15

PROCEDURE 5

EXHAUST GAS RECIRCULATION (EGR) SYSTEM MONITOR

DTC

P0401

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 10 minutes. You must complete this drive 
twice.

NOTE: . Vehicle speed and throttle opening angle should be within the shadedrange.

Inspection 
conditions

•

Engine coolant temperature: 80

°

C (176

°

F) or more

•

Atmospheric temperature: 5

°

C (41

°

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 56 

−

 64 km/h (35 

−

 40 mph).

3. Travel for 20 seconds or more while keeping the vehicle speed at 56 

−

 64 km/h (35 - 40 mph).

4. Fully close the throttle from an engine speed of 2,000 

−

 3,000 r/min, and decelerate to approx. 900 

r/min without applying the brakes. Do not steer the handle or turn the light ON/OFF during this 
time. (During monitor)

5. Accelerate until the vehicle speed reaches 56 

−

 64 km/h (35 

−

 40 mph), and travel for 20 seconds 

or more. Then, repeat steps 4 and 5 and complete 8 monitor sessions.

6. Return the vehicle to the shop, then turn the ignition switch to the "LOCK" (OFF) position.
7. Confirm that the diagnostic trouble code (DTC) is not output.
8. If DTC P0401 is output, refer to, DTC P0401 

−

 Exhaust Gas Recirculation Flow Insufficient 

Detected.

P.13B-256

   .

AKX01349

(2)

AKX01349

(3)

(5)

(5)

(5)

(5)

(2)

(1)

(4)

(4)

(4)

(4)

(4)

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

20 SECONDS OR MORE

1 ST
MON-
ITOR

7 TH
MON-
ITOR

8 TH
MON-
ITOR

2 ND
MON-
ITOR

ENGINE START

IGNITION 
SWITCH:"LOCK" 
(OFF)

FULL
DECEL-
ERATION

FULL
DECEL-
ERATION

FULL
DECEL-
ERATION

FULL
DECEL-
ERATION

FULL
DECEL-
ERATION

64
(40)

32
(20)

0

100

50

0

VEHICLE 
SPEED
km/h (mph)

<REFERENCE>
THROTTLE
OPENING
ANGLE (%)

AKX01349AB

MULTIPORT FUEL INJECTION(MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-16

PROCEDURE 6

OTHER MONITOR (Main components, sensors and switches, wire breakage and short circuit)

DTC

•

Main components: P0134, P0154,P0300, P0301, P0302, P0303, P0304, P0305, P0306, 
P0506,P0507,P1400

•

Sensors and switches: P0101,P0102,P0103,P0107,P0108,P0111,P0115,P0116,P0117, 
P0121,P0122,P0123, P0335, P0340, P0551

•

Wire breakage and short circuit: P0130, P0135, P0136, P0141, P0150, P0155, P0156, 
P0161, P0201, P0202, P0203, P0204, P0205, P0206, P0403, P0443, P0446, P1500