Mitsubishi Grandis. Manual — part 697

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI)

13A-39

STEP 5. 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 6 .

NO :

Repair or replace.

STEP 6. Check harness between B-08 (terminal
No. 2) engine coolant temperature 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 C-116, and repair if necessary.

• Check earthing line for open circuit and damage.

Q: Is the check result normal?

YES :

Go to Step 7 .

NO :

Repair.

STEP 7. MUT-III data list

• Item 21: Engine coolant temperature sensor

OK:

Engine cold state: At ambient temperature

(atmospheric temperature) or equivalent.

Engine hot state: At 80

− 120 °C

Q: Is the check result normal?

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

AK300971

1

2

AC

Harness side connector

B-08 (B)

Connector: B-08

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-40

YES :

Intermittent malfunction (Refer to GROUP

00

− How to Use

Troubleshooting/Inspection Service Points

P.00-5

).

NO :

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

STEP 8. Perform voltage measurement at B-08
engine coolant temperature sensor connector.

• Disconnect connector, and measure at harness

side.

• Ignition switch: ON

• Voltage between terminal No. 1 and earth.

OK: 4.5

− 4.9 V

Q: Is the check result normal?

YES :

Go to Step 13 .

NO :

Go to Step 9 .

STEP 9. Perform voltage measurement at C-113
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.

• Disconnect B-08 engine coolant temperature

sensor.

• Ignition switch: ON

• Voltage between terminal No. 98 and earth.

OK: 4.5

− 4.9 V

Q: Is the check result normal?

YES :

Go to Step 10 .

NO :

Go to Step 11 .

AK300971

1

2

AC

Harness side connector

B-08 (B)

Connector: B-08

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

AK300971

1

2

AC

Harness side connector

B-08 (B)

Connector: B-08

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI)

13A-41

STEP 10. 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 and repair harness between B-08

(terminal No. 1) engine coolant temperature
sensor connector and C-113 (terminal No.
98) engine-ECU <M/T> connector or
engine-A/T-ECU <A/T> connector.

• Check output line for open circuit.

NO :

Repair or replace.

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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Harness side connector

AK300971

1

2

AC

Harness side connector

B-08 (B)

Connector: B-08

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-42

STEP 12. Check harness between B-08 (terminal
No. 1) engine coolant temperature sensor
connector and C-113 (terminal No. 98)
engine-ECU <M/T> connector or engine-A/T-ECU
<A/T> connector

• Check output line for short circuit.

Q: Is the check result normal?

YES :

Go to Step 7 .

NO :

Repair.

STEP 13. Perform voltage measurement at B-08
engine coolant temperature sensor connector.

• Use special tool test harness (MB991709) to

connect connector, and measure at pick-up
harness.

• Ignition switch: ON

• Voltage between terminal No. 1 and earth.

OK:

Engine coolant temperature at

−20°C: 3.9 − 4.5

V

Engine coolant temperature at 0

°C: 3.2 − 3.8 V

Engine coolant temperature at 20

°C: 2.3 − 2.9

V

Engine coolant temperature at 40

°C: 1.3 − 1.9

V

Engine coolant temperature at 60

°C: 0.7 − 1.3

V

Engine coolant temperature at 80

°C: 0.3 − 0.9

V

Q: Is the check result normal?

YES :

Go to Step 7 .

NO :

Go to Step 14 .

AK300971

1

2

AC

Harness side connector

B-08 (B)

Connector: B-08

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

AK300971

1

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AC

Harness side connector

B-08 (B)

Connector: B-08