Mitsubishi Grandis. Manual - part 765

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI)

13A-311

YES : 

Replace engine-ECU <M/T> or 

engine-A/T-ECU <A/T>.

NO : 

Intermittent malfunction (Refer to GROUP 
00 

− How to Use 

Troubleshooting/Inspection Service Points 

P.00-5

).

STEP 4. Check crank angle sensor and camshaft 
position sensor mounted conditions.

Q: Is the check result normal? 

YES : 

Go to Step 5 .

NO : 

Repair.

STEP 5. Check timing marks of timing belt.

Q: Is the check result normal?

YES : 

Go to Step 6 .

NO : 

Align timing marks.

STEP 6. Check crank shaft sensing blead.

Q: Is the check result normal? 

YES : 

Go to Step 7 .

NO : 

Replace crank shaft sensing blead.

STEP 7. Check camshaft position sensing 
cylinder.

Q: Is the check result normal? 

YES : 

Go to Step 8 .

NO : 

Replace camshaft position sensing cylinder.

STEP 8. Replace crank angle sensor.

• After replacing the crank angle sensor, re-check 

the trouble symptoms.

Q: Does trouble symptom persist?

YES : 

Go to Step 9 .

NO : 

Check end.

STEP 9. Replace camshaft position sensor.

• After replacing the camshaft position sensor, 

re-check the trouble symptoms.

Q: Does trouble symptom persist?

YES : 

Replace engine-ECU <M/T> or 

engine-A/T-ECU <A/T>.

NO : 

Intermittent malfunction (Refer to GROUP 
00 

− How to Use 

Troubleshooting/Inspection Service Points 

P.00-5

).

Inspection Procedure 17: Run On (Dieseling)

COMMENT ON TROUBLE SYMPTOM

• Failure is possibly caused by leakage from 

injector.

PROBABLE CAUSE

• Failed injector

• Failed engine-ECU <M/T>

• Failed engine-A/T-ECU <A/T>

DIAGNOSIS PROCEDURE

STEP 1. Check injector for spray condition.

• Check each injector for spray condition (Refer to 

P.13A-393

).

Q: Does trouble symptom persist?

YES : 

Replace engine-ECU <M/T> or 

engine-A/T-ECU <A/T>.

NO : 

Replace injector.

Inspection Procedure 18: Odor, White Smoke, Black Smoke, and High-Concentration CO/HC during 
Idling

COMMENT ON TROUBLE SYMPTOM

• Failure is possibly caused by improper air-fuel 

ratio, deteriorated catalyst, failed ignition system, 
failed fuel system, failed compression pressure or 
other faults.

PROBABLE CAUSE

• Incorrect air/fuel ratio

• Failed ignition system

• Failed fuel system

• Failed intake and exhaust system

• Failed emission control system

• Failed compression pressure

• Failed catalytic converter

• Failed engine-ECU <M/T>

• Failed engine-A/T-ECU <A/T>

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI)

13A-312

DIAGNOSIS PROCEDURE

STEP 1. MUT-III diagnosis code

Q: Diagnosis code set?

YES : 

Inspection chart for diagnosis code (Refer 

to 

P.13A-20

).

NO : 

Go to Step 2 .

STEP 2. Check injector for operating sound.

• Check injector for operating sound (Refer to 

P.13A-393

).

Q: Can operating sound be heard?

YES : 

Go to Step 3 .

NO : 

Check the injector system of the defective 

cylinder.

 (Refer to, Code No. P0201: No. 1 injector 

system

P.13A-115

) 

 (Refer to, Code No. P0202: No. 2 injector 

system

P.13A-120

) 

 (Refer to, Code No. P0203: No. 3 injector 

system

P.13A-125

) 

 (Refer to, Code No. P0204: No. 4 injector 

system

P.13A-130

) 

STEP 3. Check ignition timing.

• Check ignition timing. (Refer to GROUP 11A − 

On-vehicle Service 

− Ignition Timing Check 

P.11A-11

).

Q: Is the check result normal?

YES : 

Go to Step 4 .

NO : 

Check for offset ignition timing (Refer to 
Inspection Procedure 16 

P.13A-309

).

STEP 4. MUT-III data list

• Refer to Data List Reference Table 

P.13A-363

.

a. Item 12: Air flow sensor
b. Item 13: Intake air temperature sensor

c. Item 21: Engine coolant temperature 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 Code 

P.13A-20

).

STEP 5: MUT-III data list

• Refer to Data List Reference Table 

P.13A-363

.

a. Item 25: Barometric pressure sensor

Q: Is the check result normal?

YES : 

Go to Step 6 .

NO : 

Replace engine-ECU <M/T> or 
engine-A/T-ECU <A/T>.

STEP 6. Check air intake from intake hose and 
inlet manifold.

Q: Is the check result normal?

YES : 

Go to Step 7 .

NO : 

Repair.

STEP 7. Check for emission leakage from 
exhaust manifold.

Q: Is the check result normal?

YES : 

Go to Step 8 .

NO : 

Repair.

STEP 8. Check throttle body (throttle valve 
portion) for contamination.

Q: Is the check result normal?

YES : 

Go to Step 9 .

NO : 

Clean throttle body (throttle valve portion) 
(Refer to 

P.13A-383

).

STEP 9. MUT-III data list

• Refer to Data List Reference Table 

P.13A-363

.

a. Item 11: Cylinder 1, 4 oxygen sensor (front)
b. Item 39: Cylinder 2, 3 oxygen sensor (front)

c. Item 59: Cylinder 1, 4 oxygen sensor (rear)

d. Item 69: Cylinder 2, 3 oxygen sensor (rear)

Q: Are the check results normal?

YES : 

Go to Step 10 .

NO : 

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

P.13A-20

).

STEP 10. Check Purge control solenoid valve 
itself.

• Check purge control solenoid valve itself (Refer 

to GROUP 17 

− Emission Control System − 

Evaporative Emission Control System 

− Purge 

Control Solenoid Valve Check 

P.17-62

).

Q: Is the check result normal?

YES : 

Go to Step 11 .

NO : 

Replace purge control solenoid valve.

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI)

13A-313

 STEP 11. Check EGR valve (stepper motor) itself.

• Check EGR valve (stepper motor) itself [Refer to 

GROUP 17 

− Emission Control System − 

Exhaust Gas Recirculation (EGR) System 

− EGR 

Valve (Stepper Motor) Check 

P.17-65

].

Q: Is the check result normal?

YES : 

Go to Step 12 .

NO : 

Replace EGR valve (stepper motor).

STEP 12. Fuel pressure measurement.

• Fuel pressure measurement (Refer to Fuel 

Pressure Test 

P.13A-383

).

Q: Is the check result normal?

YES : 

Go to Step 13 .

NO : 

Repair.

STEP 13. Check positive crankcase ventilation 
valve itself.

• Check positive crankcase ventilation valve itself 

(Refer to GROUP 17 

− Emission Control System 

− crankcase Emission Control System − Positive 
Crankcase Ventilation (PCV) Valve Check 

P.17-61

).

Q: Is the check result normal?

YES : 

Go to Step 14 .

NO : 

Replace positive crankcase ventilation 
valve.

STEP 14. Check spark plug.

Q: Is the check result normal?

YES : 

Go to Step 15 .

NO : 

Replace spark plug.

STEP 15. Check ignition coil itself.

• Check ignition coil itself (Refer to GROUP 16 − 

Ignition System 

− On-vehicle Service − Ignition 

Coil Check <

P.16-26

).

Q: Is the check result normal?

YES : 

Go to Step 16 .

NO : 

Replace ignition coil.

STEP 16. Check compression pressure.

• Check compression pressure (Refer to GROUP 

11A 

− On-vehicle Service − Compression 

Pressure Check 

P.11A-13

).

Q: Is the check result normal?

YES : 

Go to Step 17 .

NO : 

Repair.

STEP 17. Check injector for spraying condition.

• Check each injector for spray condition (Refer to 

P.13A-393

).

Q: Does trouble symptom persist?

YES : 

Go to Step 18 .

NO : 

Replace injector.

STEP 18. Replace catalytic converter.

• After replacing the catalytic converter, re-check 

the trouble symptoms.

Q: Does trouble symptom persist?

YES : 

Replace engine-ECU <M/T> or 

engine-A/T-ECU <A/T>.

NO : 

Check end

Inspection Procedure 19: Battery Run Down

COMMENT ON TROUBLE SYMPTOM

• Failure is possibly caused by failed alternator, 

failed generation control circuit or other faults.

PROBABLE CAUSE

• Failed battery

• Alternator G terminal short-circuited

• Failed alternator

• Failed engine-ECU <M/T>

• Failed engine-A/T-ECU <A/T>

DIAGNOSIS PROCEDURE

STEP 1. Check battery voltage.

• Measure battery voltage during cranking.

OK: 8 V or more

Q: Is the check result normal?

YES : 

Go to Step 2 .

NO : 

Check battery (Refer to GROUP 54A 

− 

Battery 

− On-vehicle Service − Battery Test 

P.54A-6

).

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI)

13A-314

STEP 2. Connector check: B-119 alternator 
connector

Q: Is the check result normal?

YES : 

Go to Step 3 .

NO : 

Repair or replace.

STEP 3. Perform voltage measurement at B-119 
alternator connector.

• Disconnect connector, and measure at harness 

side.

• Ignition switch: ON

• Voltage between terminal No. 3 and earth.

OK: System voltage

Q: Is the check result normal?

YES : 

Go to Step 5 .

NO : 

Go to Step 4 .

STEP 4. Connector check: C-307 ignition switch 
connector

Q: Is the check result normal?

YES : 

Check intermediate connectors B-17, C-02, 

C-202, and repair if necessary. If 
intermediate connectors are normal, check 
and repair harness between B-119 (terminal 
No. 3) alternator connector and C-307 
(terminal No. 2) ignition switch connector.

• Check power supply line for 

open/short circuit.

NO : 

Repair or replace.

AK300990

2

1

3

4

AC

B-119 (GR)

Connector: B-119

Harness side connector

AK300990

2

1

3

4

AC

B-119 (GR)

Connector: B-119

Harness side connector

1

2

3

4

5

6

AK305629

 C-307

 C-307

Connector: C-307

Harness side connector

<R.H.drive vehicle>

<L.H.drive vehicle>

AB

AK300990

2

1

3

4

AC

B-119 (GR)

Connector: B-119

Harness side connector