Mitsubishi Colt Ralliart. Manual - part 709

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4G1>

13B-161

Code No. P0443: Purge Control Solenoid Valve System

OPERATION

• Power is supplied to the purge control solenoid 

valve (terminal No. 2) from the engine control 
relay (terminal No. 4).

• The engine-ECU (terminal No. 38) makes the 

power transistor in the unit be in ON position, and 
that makes currents go to the purge control sole-
noid valve (terminal No. 1).

AK402707

3

1

2

4

1 2

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

Engine
control
relay

B-106

4

2

38

Engine-ECU

To engine-ECU

    A-108
MU802779

B-112

A-17

B-108

Purge control
solenoid valve

1

2

4

6

Purge Control Solenoid Valve Circuit

R

R

L-R

3

1

A-114

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

  P: Purple

1

1

R

Fusible link

16

20A

J/B

AD

Main

Index

Group

TOC

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4G1>

13B-162

FUNCTION

• In response to a signal from the engine-ECU, the 

purge control solenoid valve controls the flow rate 
of the purge air to be introduced into the surge 
tank.

TROUBLE JUDGEMENT

Check Conditions

• While engine is being cranked

• Battery voltage is more than 10 V and is less than 

16 V.

Judgement Criterion

• The surge voltage of solenoid coil is not detected 

when the purge control solenoid valve is turned in 
OFF position from ON.

PROBABLE CAUSES

• Failed purge control solenoid valve

• Open/short circuit in or damage to the purge con-

trol solenoid valve circuit or loose connector con-
tact

• Failed engine-ECU

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III actuator test

• Item 08: Purge control solenoid valve

OK: Operating sound can be heard and the 
valve vibrates.

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-108 purge control 
solenoid valve connector

Q: Is the check result normal?

YES : 

Go to Step 3 .

NO : 

Repair or replace.

STEP 3. Perform resistance measurement at 
A-108 purge control solenoid valve connector.

• Disconnect connector, and measure at solenoid 

valve side.

• Resistance between terminals No. 1 and No. 2.

OK: 30 

− 34 Ω (at 20°C) 

Q: Is the check result normal?

YES : 

Go to Step 4 .

NO : 

Replace purge control solenoid valve.

STEP 4. Perform voltage measurement at A-108 
purge control solenoid valve connector.

• Disconnect connector and measure at harness 

side.

• Ignition switch: ON

• Voltage between terminal No. 2 and earth.

OK: System voltage 

Q: Is the check result normal?

YES : 

Go to Step 6 .

NO : 

Go to Step 5 .

AK402119

1

2

AC

Connector: A-108

Harness side 
connector

A-108(B)

AK402119

1

2

AC

Connector: A-108

Harness side 
connector

A-108(B)

AK402119

1

2

AC

Connector: A-108

Harness side 
connector

A-108(B)

Main

Index

Group

TOC

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4G1>

13B-163

STEP 5. Connector check: B-106 engine control 
relay connector

Q: Is the check result normal?

YES : 

Check intermediate connectors A-17 and 

B-112, and repair if necessary. If 
intermediate connectors are normal, check 
and repair harness between A-108 (terminal 
No. 2) purge control solenoid valve 
connector and B-106 (terminal No. 4) 
engine control relay connector.

• Check power supply line for 

open/short circuit.

NO : 

Repair or replace.

STEP 6. Perform voltage measurement at A-114 
engine-ECU connector.

• Disconnect connector and measure at harness 

side.

• Ignition switch: ON

• Voltage between terminal No. 38 and earth.

OK: System voltage 

Q: Is the check result normal?

YES : 

Go to Step 8 .

NO : 

Go to Step 7 .

3

2

1

4

AK402084

J/B side 
connector

B-106

Connector: B-106
J/B (front side)

AC

AK402119

1

2

AC

Connector: A-108

Harness side 
connector

A-108(B)

AK402745

6

4

2

5

3

1

9

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66

L

AF

A-114

Connector: 

A-114

Harness side connector

Engine-ECU

Battery

Main

Index

Group

TOC

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI) <4G1>

13B-164

STEP 7. Connector check: A-114 engine-ECU 
connector

Q: Is the check result normal?

YES : 

Check and repair harness between A-108 

(terminal No. 1) purge control solenoid valve 
connector and A-114 (terminal No. 38) 
engine-ECU connector.

• Check output line for open/short 

circuit.

NO : 

Repair or replace.

STEP 8. Connector check: A-114 engine-ECU 
connector

Q: Is the check result normal?

YES : 

Go to Step 9 .

NO : 

Repair or replace.

AK402745

6

4

2

5

3

1

9

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57

58

59

60

61

62

63

64

65

66

L

AF

A-114

Connector: 

A-114

Harness side connector

Engine-ECU

Battery

AK402119

1

2

AC

Connector: A-108

Harness side 
connector

A-108(B)

AK402745

6

4

2

5

3

1

9

7

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52

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61

62

63

64

65

66

L

AF

A-114

Connector: 

A-114

Harness side connector

Engine-ECU

Battery

Main

Index

Group

TOC