Mitsubishi Grandis. Manual - part 737

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI)

13A-199

STEP 6. Connector check: C-113 engine-ECU 
<M/T> connector or engine-A/T-ECU <A/T> 
connector

Q: Is the check result normal?

YES : 

Check intermediate connector B-17, and 

repair if necessary (R. H. drive vehicles). If 
intermediate connector is normal, check and 
repair harness between B-20 (terminal No. 
3) power steering pressure sensor 
connector and C-113 (terminal No. 97) 
engine-ECU <M/T> connector or 
engine-A/T-ECU <A/T> connector.

• Check power supply line for damage.

NO : 

Repair or replace.

STEP 7. Connector check: C-113 engine-ECU 
<M/T> connector or engine-A/T-ECU <A/T> 
connector

Q: Is the check result normal?

YES : 

Go to Step 8 .

NO : 

Repair or replace.

AK305616AB

Connector: C-113

<L.H. drive vehicles>

<R.H. drive vehicles>

C-113 (GR)

C-113 (GR)

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Harness side connector

AK305622

1

2

3

AB

Connector: B-20

B-20 (B)

B-20 (B)

Harness side
connector

<L.H. drive vehicles>

<R.H. drive vehicles>

AK305616AB

Connector: C-113

<L.H. drive vehicles>

<R.H. drive vehicles>

C-113 (GR)

C-113 (GR)

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Harness side connector

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI)

13A-200

STEP 8. Check harness between B-20 (terminal 
No. 3) power steering fluid pressure sensor 
connector and C-113 (terminal No. 97) 
engine-ECU <M/T> connector or engine-A/T-ECU 
<A/T> connector.

NOTE: Before checking harness, check intermediate 
connector B-17, and repair if necessary (R. H. drive 
vehicles). 

.

•

Check power supply line for short circuit.

Q: Is the check result normal?

YES : 

Go to Step 9 .

NO : 

Repair.

STEP 9. MUT-III data list

• Refer to Data List Reference Table 

P.13A-363

a. Item B4: Power steering fluid pressure sensor 

Q: Is the check result normal?

YES : 

Intermittent malfunction (Refer to 

GROUP00 

− How to Use 

Troubleshooting/Inspection Service Points 

P.00-5

).

NO : 

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

STEP 10. Perform resistance measurement at 
B-20 power steering fluid pressure sensor

• Disconnect connector, and measure at harness 

side.

• Resistance between terminal No. 1 and earth.

OK: 2 

Ω or less

Q: Is the check result normal?

YES : 

Go to Step 13 . 

NO : 

Go to Step 11.

AK305622

1

2

3

AB

Connector: B-20

B-20 (B)

B-20 (B)

Harness side
connector

<L.H. drive vehicles>

<R.H. drive vehicles>

AK305616AB

Connector: C-113

<L.H. drive vehicles>

<R.H. drive vehicles>

C-113 (GR)

C-113 (GR)

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120

Harness side connector

AK305622

1

2

3

AB

Connector: B-20

B-20 (B)

B-20 (B)

Harness side
connector

<L.H. drive vehicles>

<R.H. drive vehicles>

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI)

13A-201

STEP 11. Connector check: C-113 engine-ECU 
<M/T> connector or engine-A/T-ECU <A/T> 
connector

Q: Is the check result normal?

YES : 

Go to Step 12 .

NO : 

Repair or replace.

AK305616AB

Connector: C-113

<L.H. drive vehicles>

<R.H. drive vehicles>

C-113 (GR)

C-113 (GR)

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120

Harness side connector

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI)

13A-202

STEP 12. Check harness between B-20 (terminal 
No. 1) power steering fluid pressure sensor 
connector and C-113 (terminal No. 96) 
engine-ECU <M/T> connector or engine-A/T-ECU 
<A/T> connector.
NOTE: Before checking harness, check intermediate 
connector B-17 (R. H. drive vehicles) and C-116, and 
repair if necessary.

• Check earthing line for open circuit and damage.

Q: Is the check result normal?

YES : 

Go to Step 9 .

NO : 

Repair.

STEP 13. Perform voltage measurement at C-112 
engine-ECU <M/T> connector or engine-A/T-ECU 
<A/T> connector.

• Measure engine-ECU <M/T> or engine-A/T-ECU 

<A/T> terminal voltage. 

• Ignition switch: ON 

• Voltage between terminal No. 84 and earth.

OK: 1V or less (Steering wheel: Not 
operated)
Voltage rises (Steering wheel: Operated)

Q: Is the check result normal?

YES : 

Go to Step17 .

NO : 

Go to Step 14 .

AK305622

1

2

3

AB

Connector: B-20

B-20 (B)

B-20 (B)

Harness side
connector

<L.H. drive vehicles>

<R.H. drive vehicles>

AK305616AB

Connector: C-113

<L.H. drive vehicles>

<R.H. drive vehicles>

C-113 (GR)

C-113 (GR)

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Harness side connector

AK305617

Connector: C-112 

C-112 (GR)

C-112 (GR)

AB

Harness side connector

<R.H. drive vehicles>

<L.H. drive vehicles>