Mitsubishi Colt Ralliart. Manual — part 17

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4A9>

13A-22

INSPECTION PROCEDURE FOR
DIAGNOSIS CODES

Code No. P0011: Variable Valve Timing System

FUNCTION

• The engine-ECU <M/T> or engine-CVT-ECU

<CVT> checks whether the variable valve timing
system has malfunction.

TROUBLE JUDGMENT

Check Conditions

• Engine is running.

• Oil feeder control valve operation: OFF

• The oil feeder control valve is normal <M/T>.

• Camshaft position sensor and crank angle sensor

are normal <M/T>.

Judgment Criteria

• For 10 seconds, the phase angle of the intake

camshaft is 15

° or more.

• For 4 seconds, the electrical current of the oil

feeder control valve monitor is abnormal <CVT>.

Check Condition

• Ignition switch is in "ON" position <M/T>.

Judgment Criterion

• Variable Valve Timing monitor current is abnor-

mal <M/T>.

Check Condition

• Ignition switch is in "ON" position <M/T>.

Judgment Criteria

• The battery voltage is 9.0 V or more <M/T>.

• Variable Valve Timing monitor current is abnor-

mal <M/T>.

Check Condition

• Ignition switch is in "ON" position <M/T>.

Judgment Criteria

• The battery voltage is 9.0 V or more <M/T>.

• The oil feeder control valve is in ON position

<M/T>.

• Variable Valve Timing monitor current is abnor-

mal <M/T>.

POSSIBLE CAUSES

• Failed oil feeder control valve

• Oil passage of variable valve timing control sys-

tem clogged

• Variable valve timing sprocket operation system

stuck

• Failed engine-ECU <M/T> or engine-CVT-ECU

<CVT>

DIAGNOSIS PROCEDURE

STEP 1. Check oil feeder control valve

• Check oil feeder control valve (Refer to

P.13A-365

).

Q: Is the check result normal?

YES :

Go to Step 2 .

NO :

Replace oil feeder control valve.

STEP 2. Check for oil passage of variable valve
timing control system clogged

Q: Is the check result normal?

YES :

Go to Step 3 .

NO :

Repair.

STEP 3. Check for variable valve timing sprocket
operation system stuck

Q: Is the check result normal?

YES :

Go to Step 4 .

NO :

Repair.

STEP 4. M.U.T.-III diagnosis code

• Reconfirmation of diagnosis code.

Q: Is the check result normal?

YES :

Replace engine-ECU <M/T> or

engine-CVT-ECU <CVT>.

NO :

Intermittent malfunction (Refer to Group 00
− How to Use Troubleshooting/Inspection
Service Points

− How to Cope with

Intermittent Malfunctions

P.00-13

).

Main

Index

Group

TOC

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4A9>

13A-23

Code No. P0105: Manifold Absolute Pressure Sensor System

OPERATION

• A power voltage of 5 V is applied to the manifold

absolute pressure sensor power terminal (termi-
nal No. 2) from the engine-ECU <M/T> or
engine-CVT-ECU <CVT> (terminal No. 32) and
earthed to the engine-ECU <M/T> or
engine-CVT-ECU <CVT> (terminal No. 33) from
the manifold absolute pressure sensor (terminal
No. 4).

• The sensor signal is inputted to the engine-ECU

<M/T> or engine-CVT-ECU <CVT> (terminal No.
17) from the manifold absolute pressure sensor
output terminal (terminal No. 1).

FUNCTION

• The manifold absolute pressure sensor converts

the manifold absolute pressure into a voltage sig-
nal and inputs the signal to the engine-ECU
<M/T> or engine-CVT-ECU <CVT>.

• In response to the signal, the engine-ECU <M/T>

or engine-CVT-ECU <CVT> corrects the fuel
injection amount, etc.

AK402676

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2

3 4

19

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1213

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8 9

L

10

37
52 53 54 555657585960616263646566

38 39 404142434445464748495051

22 23 24 252627282930313233343536

7

5

3

1

6

4

2

AC

Engine-ECU <M/T> or
engine-CVT-ECU <CVT>

5 V

Manifold absolute
pressure sensor

BR-W

W-L

Y

2

1

4

Manifold Absolute Pressure Sensor Circuit

32

33

17

A-114

A-106

Wire colour code
B: Black LG: Light green G: Green L: Blue W: White Y: Yellow SB: Sky blue BR: Brown O: Orange GR: Gray
R: Red P: Pink V: Violet Pu: Purple

Main

Index

Group

TOC

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4A9>

13A-24

TROUBLE JUDGMENT

Check Condition

• 2 seconds later after the ignition switch has been

in ON position or the engine has started up

Judgment Criterion

• The sensor output voltage is 4.7 V <M/T> or 4.5

V <CVT> or more (barometric pressure above
114 kPa or equivalent) for 4 seconds.

Check Conditions

• 2 seconds later after the ignition switch has been

in ON position or the engine has started up.

• State of vehicle stop or throttle position sensor

(main) output voltage is 1.3 V or more.

Judgment Criterion

• The sensor output voltage is 0.2 V or less (baro-

metric pressure below 5 kPa or equivalent) for 4
seconds.

PROBABLE CAUSES

• Failed manifold absolute pressure sensor

• Open/short circuit in manifold absolute pressure

sensor circuit or loose connector contact

• Failed engine-ECU <M/T> or engine-CVT-ECU

<CVT>

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III data list

• Refer to Data List Reference Table

P.13A-331

.

a. Item 32: Manifold absolute pressure sensor

Q: Is the check result normal?

YES :

Intermittent malfunction (Refer to GROUP

00

− How to Use

Troubleshooting/Inspection Service Points

−

How to Cope with Intermittent Malfunctions

P.00-13

).

NO :

Go to Step 2 .

STEP 2. Connector check: A-106 manifold
absolute pressure sensor connector

Q: Is the check result normal?

YES :

Go to Step 3 .

NO :

Repair or replace the connector.

STEP 3. Perform voltage measurement at A-106
manifold absolute pressure sensor connector.

• Disconnect and measure at harness side.

• Ignition switch: ON

• Voltage between terminal No. 2 and earth.

OK: 4.9

− 5.1 V

Q: Is the check result normal?

YES :

Go to Step 9 .

NO :

Go to Step 4 .

AK402005

4

3

2 1

AC

A-106

Connector: A-106

A-106 Harness side
connector

AK402005

4

3

2 1

AC

A-106

Connector: A-106

A-106 Harness side
connector

Main

Index

Group

TOC

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4A9>

13A-25

STEP 4. Perform voltage measurement at A-114
engine-ECU connector or engine-CVT-ECU
connector.

• Disconnect engine-ECU <M/T> or

engine-CVT-ECU <CVT> connector, and connect
special tool power plant ECU check harness
(MB991987), and then measure the voltage on
the check connector.

• Ignition switch: ON

• Voltage between terminal No. 32 and earth.

OK: 4.9

− 5.1 V

Q: Is the check result normal?

YES :

Go to Step 5 .

NO :

Go to Step 6 .

STEP 5. Connector check: A-114 engine-ECU
connector or engine-CVT-ECU connector

Q: Is the check result normal?

YES :

Check and repair harness between A-106

(terminal No. 2) manifold absolute pressure
sensor connector and A-114 (terminal No.
32) engine-ECU connector or
engine-CVT-ECU connector.

• Check power supply line for open

circuit.

NO :

Repair or replace the connector.

AK402745

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L

AE

A-114

Connector:

A-114

Engine-ECU <M/T> or
engine-CVT-ECU <CVT>

Battery

A-114 Special tool power plant ECU check
harness

AK402745

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4

2

5

3

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9

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AD

A-114

Connector:

A-114

Harness side connector

Engine-ECU <M/T> or
engine-CVT-ECU <CVT>

Battery

AK402005

4

3

2 1

AC

A-106

Connector: A-106

A-106 Harness side
connector

Main

Index

Group

TOC