Mitsubishi Lancer Evolution IX. Manual - part 447

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI)

13A-263

STEP 9. Connector check: C-119 engine-ECU 
connector

Q: Is the check result normal?

YES : 

Check intermediate connector C-123, and 

repair if necessary. If intermediate 
connector is normal, check and repair 
harness between C-208 (terminal No. 9) 
ignition switch connector and C-119 
(terminal No. 68) engine-ECU connector.

• Check output line for open/short 

circuit.

NO : 

Repair or replace the connector.

STEP 10. M.U.T.-II/III data list

• Refer to Data List Reference Table 

P.13A-372

.

a. Item No. 22: Crank angle sensor 

Q: Is the check result normal?

YES : 

Go to Step 11 .

NO : 

Check crank angle sensor system (Refer to 
Code No. P0335 

P.13A-155

).

AK501994

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46

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59

67

68

45

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66

52 51

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53

62

54

63

57

55

AB

Connector: C-119

C-119 (GR)

C-119 (GR)

Harness side connector

<L. H. drive vehicles>

<R. H. drive vehicles>

AK305251

1

2

3

4

5

6

Harness side connector

Connector: C-208

C-208

<L. H. drive vehicles>

<R. H. drive vehicles>

C-208

AB

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI)

13A-264

STEP 11. Check injector for operating sound.

• Check injector for operating sound (Refer to 

P.13A-406

).

Q: Can operating sound be heard? 

YES : 

Go to Step 12 .

NO : 

Check the injector system of the defective 

cylinder

(Refer to Code No. 0201: No. 1 injector system 

P.13A-105

).

(Refer to Code No. 0202: No. 2 injector system 

P.13A-111

).

(Refer to Code No. 0203: No. 3 injector system 

P.13A-117

).

(Refer to Code No. 0204: No. 4 injector system 

P.13A-123

).

STEP 12. Check ignition coil spark

Q: Is the check result normal?

YES : 

Go to Step 13 .

NO : 

Check ignition circuit system (refer to 
inspection procedure 30 <L. H. drive 
vehicles>

P.13A-356

 or inspection 

procedure 31 <R. H. drive 
vehicles>

P.13A-363

).

STEP 13. Replace the engine-ECU.

• After replacing the engine-ECU, re-check the 

trouble symptoms.

Q: Does trouble symptom persist? 

YES : 

Check for foreign matters (water, kerosene, 

etc.) in fuel and replace if necessary. 

NO : 

The check is end.

Inspection Procedure 7: Starting Impossible (Initial Combustion but no Complete Combustion),  
Starting (Long Time to Start)

COMMENTS ON TROUBLE SYMPTOM

• Failure is possibly caused by poor ignition, incor-

rect air-fuel ratio at cranking, improper fuel pres-
sure or other faults.

PROBABLE CAUSES

• Failed battery

• Failed ignition system

• Failed fuel system

• Failed air-fuel ratio control system

• Failed idle speed control system

• Failed intake system

• Failed exhaust gas cleaning system

• Throttle valve fouled around

• Timing belt not in place

• Compression pressure improper

• Failed engine-ECU

DIAGNOSIS PROCEDURE

STEP 1. Check battery condition.

Q: Have the battery terminal been disconnected? 

YES : 

After warm-up engine, idle for about 10 

minutes.

NO : 

Go to Step 2 .

STEP 2. Check battery voltage.

• Measure battery voltage at cranking.

OK: 8 V or higher 

Q: Is the check result normal?

YES : 

Go to Step 3 .

NO : 

Check battery (Refer to GROUP 54A 

− 

Battery 

− On-vehicle Service − Battery Test 

P.54A-5

).

STEP 3. M.U.T.-II/III diagnosis code

Q: Diagnosis code set?

YES : 

Inspection chart for diagnosis codes (Refer 

to 

P.13A-17

).

NO : 

Go to Step 4 .

STEP 4. M.U.T.-II/III data list

• Refer to Data List Reference Table 

P.13A-372

.

a. Item No. 13: Intake air temperature sensor 
b. Item No. 21: Engine coolant temperature sen-

sor 

c. Item No. 25: Barometric pressure sensor

Q: Are the check results normal?

YES : 

Go to Step 5 .

NO : 

Perform the diagnosis code classified check 
procedure for the sensor that has shown an 
abnormal data value (Refer to Inspection 
Chart for Diagnosis Codes 

P.13A-17

).

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI)

13A-265

STEP 5. Check start ability.

• With depressing the accelerator pedal slightly, 

and start the engine. 

Q: Is the start ability good?

YES : 

Go to Step 6 .

NO : 

Go to Step 7 .

STEP 6. Check idle speed control servo for 
operating sound.

• Check idle speed control servo for operating 

sound (Refer to 

P.13A-408

).

Q: Is the check result normal?

YES : 

Clean throttle body (throttle valve portion) 

(Refer to 

P.13A-395

).

NO : 

Check idle speed control servo system 
(Refer to Code No. P0505 

P.13A-190

).

STEP 7. M.U.T.-II/III actuator test

• Refer to Actuator Test Reference Table 

P.13A-378

.

a. Item No. 07: Fuel pump

OK: Operating sound of fuel pump can be 
heard.

Q: Is the check result normal?

YES : 

Go to Step 8 .

NO : 

Check fuel pump system (Refer to 
Inspection Procedure 24 

P.13A-313

).

STEP 8. Check air intake from intake hose and 
intake manifold.

Q: Is the check result normal?

YES : 

Go to Step 9 .

NO : 

Repair.

STEP 9. Check injector for operating sound.

• Check injector for operating sound at engine 

cranking (Refer to 

P.13A-406

).

Q: Can operating sound be heard?

YES : 

Go to Step 10 .

NO : 

Check the injector system of the defective 

cylinder

(Refer to Code No. 0201: No. 1 injector system 

P.13A-105

).

(Refer to Code No. 0202: No. 2 injector system 

P.13A-111

).

(Refer to Code No. 0203: No. 3 injector system 

P.13A-117

).

(Refer to Code No. 0204: No. 4 injector system 

P.13A-123

).

STEP 10. Check timing marks of timing belt.

Q: Is the check result normal?

YES : 

Go to Step 11 .

NO : 

Align timing marks.

STEP 11. Perform voltage measurement at C-119 
engine-ECU connector.

• Measure engine-ECU terminal voltage.

• Voltage between terminal No. 46 and earth also 

between terminal No. 58 and earth.

OK: System voltage

Q: Is the check result normal?

YES : 

Go to Step 13 .

NO : 

Go to Step 12 .

AK501994

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43
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49

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60

61

64

46

47

58

59

67

68

45

56
66

52 51

44

53

62

54

63

57

55

AB

Connector: C-119

C-119 (GR)

C-119 (GR)

Harness side connector

<L. H. drive vehicles>

<R. H. drive vehicles>

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI)

13A-266

STEP 12. Connector check: C-119 engine-ECU 
connector

Q: Is the check result normal?

YES : 

Check and repair harness between C-119 

(terminal No. 46 and No. 58) engine-ECU 
connector and body earth.

• Check earth line for open circuit and 

damage.

NO : 

Repair or replace the connector.

STEP 13. Connector check: B-103 and B-114 
ignition coil connectors.

Q: Is the check result normal?

YES : 

Go to Step 14 .

NO : 

Repair or replace the connector.

STEP 14. Check ignition coil spark.

Q: Is the check result normal?

YES : 

Go to Step 19 .

NO : 

Go to Step 15 .

STEP 15. Check spark plug.

Q: Is the check result normal?

YES : 

Go to Step 16 .

NO : 

Replace the spark plug.

STEP 16. Check spark plug cable itself.

• Check spark plug cable itself (Refer to GROUP 

16 

− Ignition System − On-vehicle Service 

P.16-29

).

Q: Is the check result normal?

YES : 

Go to Step 17 .

NO : 

Replace the spark plug cable.

STEP 17. Check ignition coil itself.

• Check ignition coil itself (Refer to GROUP 16 − 

Ignition System 

− On-vehicle Service 

P.16-28

).

Q: Is the check result normal?

YES : 

Go to Step 18 .

NO : 

Replace the ignition coil.

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61

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58

59

67

68

45

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66

52 51

44

53

62

54

63

57

55

AB

Connector: C-119

C-119 (GR)

C-119 (GR)

Harness side connector

<L. H. drive vehicles>

<R. H. drive vehicles>

AK305047

1

2

3

Connector : B-103, B-114

B-114(GR)

B-103(GR)

AB

Harness side 
connector