Mitsubishi 380. Manual - part 480

MULTIPOINT FUEL INJECTION (MPI) DIAGNOSIS

MULTIPOINT FUEL INJECTION (MPI)

13A-12

PROCEDURE 1

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

03DB261A

(3)

(2)

(1)

(4)

(5)

(5)

(6)

(6)

(6)

(5)

(5)

(7)

5 MINUTES OR MORE

72 - 97 km/h 

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

1.5 MINUTES OR MORE

56 - 64 km/h 

97

64

32

0

100

50

0

VEHICLE 

SPEED

km/h 

03DB261A

CALCULATED

LOAD (%)

MULTIPOINT FUEL INJECTION (MPI) DIAGNOSIS

MULTIPOINT FUEL INJECTION (MPI)

13A-13

.

Test 
procedure

1. Engine: start
2. Accelerate until the vehicle speed is 72 km/h.
3. Travel for 5 minutes or more while keeping the vehicle speed at 72 

− 97 km/h.

4. Decelerate until the vehicle speed is within 56 

− 64 km/h.

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

56 

− 64 km/h and travel for 1.5 minutes 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. 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 (Bank 1) .
If DTC P0431 is output, refer to DTC P0431 

− Warm - Up Catalyst Efficiency Below 

Threshold (Bank 2) .

CATALYTIC CONVERTER MONITOR

MULTIPOINT FUEL INJECTION (MPI) DIAGNOSIS

MULTIPOINT FUEL INJECTION (MPI)

13A-14

PROCEDURE 2

.

HEATED OXYGEN SENSOR MONITOR

DTC

P0133, P0139, P0153, P0159.

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 5 minutes or more. You 
must complete this drive twice. 

Inspection 
conditions

• Engine coolant temperature: 80°C or more

• Atmospheric temperature: −10°C or more

Test 
procedure

1. Engine: start
2. Accelerate until the vehicle speed is 56 

− 64 km/h.

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

56 

− 64 km/h and travel for 2 minutes or more.

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 a DTC is displayed, refer to Diagnostic Trouble Code Chart 

P.13A-17

.

03DB262A

(3)

(2)

(1)

(4)

2 MINUTES OR MORE

 56 - 64 km/h 

ENGINE 

START

IGNITION 

SWITCH: "LOCK"

(OFF)

DURING MONITOR

97

64

32

0

100

50

0

VEHICLE SPEED

km/h 

CALCULATED

LOAD (%)

MULTIPOINT FUEL INJECTION (MPI) DIAGNOSIS

MULTIPOINT FUEL INJECTION (MPI)

13A-15

PROCEDURE 3

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

DTC

• Main components: P0106, P0107, P0108, P0134, P0154, P0300, P0301, P0302, P0303, 

P0304, P0305, P0306, P0506, P0507

• Sensors and switches: P0101, P0102, P0103, P0111, P0112, P0113, P0116, P0117, 

P0118, P0125, P0335, P0340, P0461. 

• Wire breakage and short circuit: P0130, P0131, P0132, P0135, P0136, P0137, P0138, 

P0140, P0150, P0151, P0152, P0155, P0156, P0157, P0158, P0160, P0161, P0201, 
P0202, P0203, P0204, P0205, P0206, P0443.

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 10 minutes. You must 
complete this drive twice.

NOTE: Drive according to the graph below.

Inspection 
conditions

• Engine coolant temperature: 80°C 

• Atmospheric temperature: -10°C or more

Test 
procedure

1. Engine: start
2. Accelerate until the vehicle speed is 56 - 64 km/h and travel for 5 minutes or more. 
3. Return the vehicle to shop.
4. After stopping the vehicle, continue idling for 5 minutes, then turn the ignition switch to 

"LOCK" (OFF) position.

5. Confirm that the diagnostic trouble code (DTC) is not output.
6. If a DTC is displayed, refer to Diagnostic Trouble Code Chart 

P.13A-17

.

03DB263A

(3)

(2)

(1)

(4)

5 MINUTES OR MORE

56 - 64 km/h 

ENGINE: IDLING

TRANSMISSION: NEUTRAL

5 MINUTES

ENGINE START

IGNITION 

SWITCH:"LOCK"

(OFF)

64

32

0

100

50

0

VEHICLE 

SPEED

km/h 

CALCULATED

LOAD (%)