Mitsubishi Lancer Evolution IX. Manual — part 430

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI)

13A-195

Code No. P0513: Immobilizer System

OPERATION

• The signals are sent and received between

engine-ECU (terminal No. 98) and immobi-
lizer-ECU (terminal No. 7).

FUNCTION

• Engine-ECU sends or receives the control sig-

nals to or from immobilizer-ECU to certify the
ignition key.

NOTE:

.

•

If the registered ignition keys are close each
other when starting the engine, radio interfer-
ence may cause this code to be displayed.

•

This code may be displayed when registering
the key encrypted code.

TROUBLE JUDGMENT

Check Condition

• Ignition switch: "ON"

Judgment Criterion

• When the communication error between the

engine-ECU and the immobilizer-ECU continues
for 2 seconds or more.

PROBABLE CAUSES

• Open/short circuit in immobilizer system circuit or

loose connector contact

• Failed immobilizer-ECU

• Failed engine-ECU

1

2

3 4 5 6 7

AK501818

2

1

3 4

80

87

81

94

85

82

84

93

86

98

99

74

92

73

83

88

91

95

97

96

100

89

78

71

90

76 77

75

72
79

3

98

7

21

C-207

MU801547

C-117

(MU803783)

Engine-ECU

Immobilizer system circuit

Immobilizer-ECU

GR

R-W

C-207-1

C-207-1

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

AB

C-124

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI)

13A-196

DIAGNOSIS PROCEDURE

STEP 1. Connector check: C-207
immobilizer-ECU connector and C-117
engine-ECU connector

Q: Is the check result normal?

YES :

Go to Step 2 .

NO :

Repair or replace the connector.

STEP 2. Check harness between C-207 (terminal
No. 7) immobilizer-ECU connector and C-117
(terminal No. 98) engine-ECU connector.

NOTE: Before checking harness, check intermediate
connector C-124, and repair if necessary.

• Check output line for open/short circuit and dam-

age.

Q: Is the check result normal?

YES :

Go to Step 3 .

NO :

Repair the damaged harness wire.

AK305030

2

1

7 6 5 4 3

AB

Connector : C-207

Harness side
connector

C-207

AK501996

80

87

81

94

85

82

84

93

86

98

99

74

92

73

83

88

91

95

97 96

100

89

78

71

90

76

77

75

72
79

AB

Connector: C-117

C-117 (GR)

C-117 (GR)

Harness side connector

<L. H. drive vehicles>

<R. H. drive vehicles>

AK305030

2

1

7 6 5 4 3

AB

Connector : C-207

Harness side
connector

C-207

AK501996

80

87

81

94

85

82

84

93

86

98

99

74

92

73

83

88

91

95

97 96

100

89

78

71

90

76

77

75

72
79

AB

Connector: C-117

C-117 (GR)

C-117 (GR)

Harness side connector

<L. H. drive vehicles>

<R. H. drive vehicles>

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI)

13A-197

STEP 3. Check the trouble symptoms.

Q: Does trouble symptom persist?

YES :

Go to Step 4 .

NO :

Intermittent malfunction (Refer to GROUP
00

− How to Use

Troubleshooting/Inspection Service Points

P.00-5

).

STEP 4. Replace the immobilizer-ECU.

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

trouble symptoms.

Q: Does trouble symptom persist?

YES :

Replace the engine-ECU.

NO :

The check is end.

Code No. P0551: Power Steering Fluid Pressure Switch System

CONDITION

• The battery voltage is applied to the power steer-

ing fluid pressure switch (terminal No. 1) from the
engine-ECU (terminal No. 54).

AK501819

1

65

43
50

42
49

41
48
60 61

64

46 47
58 59
67 68

45

56
66

52

51

44

53

62

54

63

57

55

R-W

R-W

54

Power steering fluid
pressure switch

A-40

1

Power steering fluid pressure switch circuit

C-119

(MU803782)

Engine-ECU

5 <A-13> (*1) or
15 <C-31> (*2)

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

NOTE

*1: L.H. drive vehicles
*2: R.H. drive vehicles

AB

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI)

13A-198

FUNCTION

• It is detected whether a load is applied on the

power steering fluid pump by steering or not, and
the signal is inputted to the engine-ECU. When
the power steering fluid pressure switch "ON" sig-
nal (a large load on the power steering fluid
pump) is inputted, the engine-ECU provides the
idle-up control.

TROUBLE JUDGMENT

Check Conditions

• The engine coolant temperature is 30°C or

higher.

• Drive for 4 seconds or more with the vehicle

speed is 50 km/h or more. Stop the vehicle (vehi-
cle speed is 1.5 km/h or less). Repeat 10 times is
more.

Judgment Criterion

• The power steering fluid pressure switch remains

in "ON" position.

PROBABLE CAUSES

• Failed power steering fluid pressure switch

• Open/short circuit in power steering fluid pres-

sure switch circuit or loose connector contact

• Failed engine-ECU

DIAGNOSIS PROCEDURE

NOTE:

.

*1: L.H. drive vehicles
*2: R.H. drive vehicles

STEP 1. Connector check: A-40 power steering
fluid pressure switch connector

Q: Is the check result normal?

YES :

Go to Step 2 .

NO :

Repair or replace the connector.

STEP 2. Perform voltage measurement at A-40
power steering fluid pressure switch connector.

• Disconnect connector, and measure at harness

side.

• Ignition switch: "ON"

• Voltage between terminal No. 1 and earth.

OK: System voltage

Q: Is the check result normal?

YES :

Go to Step 8 .

NO :

Go to Step 3 .

1

AK502001AB

Connector: A-40

Harness side
connector

A-40 (B)

1

AK502001AB

Connector: A-40

Harness side
connector

A-40 (B)