Mitsubishi Colt Ralliart. Manual - part 15

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4A9>

13A-14

DRIVE CYCLE

The following five drive cycle patterns are performed on the diagnosis codes monitored during the vehicle 
driving. The vehicle driving requires the patterns to identify the fault. In other words, doing such a drive allows 
to regenerate any kind of trouble which involves illuminating the engine warming lamp (check engine lamp) 
and to verify the repair procedure has eliminated the trouble [the engine warming lamp (check engine lamp) is 
no longer illuminated].

CAUTION

Two technicians should always be in the vehicle when carrying out a test drive.
NOTE: Check that the diagnosis code is not output before traveling in the Drive cycle pattern. Erase the diag-
nosis code if it has been output.
DRIVE CYCLE PATTERN LIST

Procedure

Monitor item

Diagnosis code

1

Catalytic converter monitor

P0421

2

Oxygen sensor (front) monitor

P0130

3

Other monitor

P0135, P0136, P0141, 
P0201, P0202, P0203, 
P0204, P0301, P0302, 
P0303, P0304, P0325, 
P0638

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TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4A9>

13A-15

Procedure 1

Catalytic converter monitor
Diagnosis 
code No.

P0421

Drive cycle 
pattern

One trip monitor [from start to ignition switch to "LOCK" (OFF) position] will be completed 
while traveling with the following drive cycle pattern. It will take 16 minutes or more.

Inspection 
condition

• Atmospheric temperature: −10°C or more

Test 
procedure

1. Engine: start
2. Accelerate until the vehicle speed is 90 km/h or more.
3. Travel for 6 minutes or more while keeping the vehicle speed at 90 km/h or more.
4. Decelerate until the vehicle speed is within 80 km/h or less.
5. While traveling at 55 

− 80 km/h for 10 minutes or more, fully close the throttle at least once 

in 2 minutes and decelerate for 10 seconds or more.

• Do not repeat deceleration too often.

• Vehicle speed may go below 55 km/h after the deceleration.

• Stopping and braking are permitted. (If stopped or drive at 55 km/h or less for more 

than 5 minutes the monitoring may be stopped. In this case please restart monitoring 
from the beginning.)

6. After completing the above deceleration, bring the vehicle speed back to 55 

− 80 km/h and 

keep it in the range until starting the deceleration again.

• Repeat the above deceleration at least 5 times.

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

AK301815

10 minutes or more

Ignition switch : 
"LOCK" (OFF)
position

Engine Start

Vehicle
speed

6 minutes or more

90 km/h or more

55 - 80 km/h

(1)

(5,6)

(4)

(3)

(2)

(7)

Time

Stopping and braking
permitted

AB

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TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4A9>

13A-16

Procedure 2

Oxygen sensor (front) monitor
Diagnosis 
code No.

P0130

Drive cycle 
pattern

One trip monitor [from start to ignition switch to "LOCK" (OFF) position] will be completed 
while traveling with the following drive cycle pattern. It will take 16 minutes or more.

Inspection 
conditions

• Engine coolant temperature: After engine warm up

• Atmospheric temperature: −10°C or more

Test 
procedure

1. Engine: start
2. Accelerate until the vehicle speed is 55 

− 80 km/h.

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

55 

− 80km/h and travel for 16 minutes or more.

• Stopping and braking during this operation are permitted.

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

AK301816AB

16 minutes or more

Ignition switch : 
"LOCK" (OFF)
position

Engine Start

Vehicle
speed

55 - 80 km/h

(1)

(4)

(3)

(2)

Time

Stopping and braking
permitted

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TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4A9>

13A-17

Procedure 3

READINESS TEST STATUS

The engine-ECU <M/T> or engine-CVT-ECU <CVT> 
monitors the following main diagnosis items, judges 
if these items are in good condition or not, and the 
stores its history. this history can be read out by 
using M.U.T.-III. (If the ECU has judged a item 
before, the M.U.T.-III displays "Complete").

In addition, if diagnosis codes are erased or the bat-
tery cable is disconnected, this history will also be 
erased (the memory will be reset).

• Catalyst: P0421

• Oxygen sensor: P0130, P0136

• Oxygen sensor heater: P0135, P0141

Other monitor
Diagnosis 
code No.

P0135, P0136, P0141, P0201, P0202, P0203, P0204, P0301, P0302, P0303, P0304, 
P0325, P0638

Drive cycle 
pattern

One trip monitor [from start to ignition switch to "LOCK" (OFF) position] will be completed 
while traveling with the following drive cycle pattern. It will take 21 minutes or 
more.

Inspection 
conditions

• Engine coolant temperature: After engine warm up

• Atmospheric temperature: −10°C or more

Test 
procedure

1. Engine: start
2. Accelerate until the vehicle speed is 55 km/h.
3. While keeping the accelerator pedal opening degree constant, keep the vehicle speed at 

55 km/h and travel for 16 minutes or more.

4. Return the vehicle to the shop.
5. After stopping the vehicle, continue idling for 5 minutes, and then turn the ignition switch 

to "LOCK" (OFF) position.

AK301817

16 minutes or more

Ignition switch : 
"LOCK" (OFF)
position

Engine Start

Vehicle
speed

55 km/h or more

(1)

(4)

(3)

(2)

(5)

Time

AC

5 minutes or more
Engine: Idling
Transmission: "P" range

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