Mitsubishi Lancer Evolution IX. Manual — part 445

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI)

13A-255

Inspection Procedure 5: Starting Impossible (No Initial Combustion)

OPERATION

• If the ignition switch is turned to "START" posi-

tion, battery voltage is applied to starter (terminal
No. 1).

• If the ignition switch is turned to "START" posi-

tion, battery voltage is applied to engine-ECU
(terminal No. 68) from ignition switch. Because of
this, engine-ECU detects that the engine is
cranked.

COMMENT ON TROUBLE SYMPTOM

• Failure is possibly caused by failed starter itself

or failed related circuit.

PROBABLE CAUSES

• Failed battery

• Failed starter motor

• Open/short circuit in starter associated circuit or

loose connector contact

AK501826

1

1

1 2 3
4 5 6

M

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60 61

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46 47
58 59
67 68

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Battery

OFF

ON

AB

Starter

B-19

B-21

(MU801211)

C-119

(MU803782)

C-208

B-R

B-R

B-R

B-R

B-Y

B-L

68

R

IG2

ST

LOCK

ACC

IG1

Ignition switch

Starter circuit

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 PU: Purple

Engine-ECU

5

7

C-123

3

B-14

1

B-21

1

B-19

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI)

13A-256

DIAGNOSIS PROCEDURE

STEP 1. Check battery voltage.

• Measure battery voltage at cranking.

OK: 8 V or higher

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-5

).

STEP 2. M.U.T.-II/III data list

• Item No. 18: Cranking signal

OK:

ON (Ignition switch: ST)
OFF (Ignition switch: ON)

Q: Is the check result normal?

YES :

Go to Step 8 .

NO :

Go to Step 3 .

STEP 3. Connector check: C-119 engine-ECU
connector

Q: Is the check result normal?

YES :

Go to Step 4 .

NO :

Repair or replace the connector.

STEP 4. Perform voltage measurement at C-119
engine-ECU connector.

• Disconnect connector, and measure at the har-

ness side.

• Ignition switch: ST

• Voltage between terminal No. 68 and earth.

OK: System voltage

Q: Is the check result normal?

YES :

Go to Step 7 .

NO :

Go to Step 5 .

AK501994

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AB

Connector: C-119

C-119 (GR)

C-119 (GR)

Harness side connector

<L. H. drive vehicles>

<R. H. drive vehicles>

AK501994

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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-257

STEP 5. Connector check: C-208 ignition switch
connector

Q: Is the check result normal?

YES :

Go to Step 6 .

NO :

Repair or replace the connector.

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-258

STEP 6. Check ignition switch.

• Check ignition switch (Refer to GROUP 54A −

Ignition Switch

− Ignition Switch − Inspection

P.54A-30

).

Q: Is the check result normal?

YES :

Check intermediate connectors C-123, and

repair if necessary. If intermediate
connectors are normal, check and repair
harness between C-119 (terminal No. 68)
inhibitor switch connector and C-208
(terminal No. 5) ignition switch connector.

• Check power supply line for

open/short circuit.

NO :

Replace the ignition switch.

AK501994

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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