Mitsubishi Grandis. Manual — part 348

IGNITION SWITCH

CHASSIS ELECTRICAL

54A-11

DIAGNOSTIC TROUBLE CODE
PROCEDURES

Code No.11 Trouble related to the communication with ignition key

DIAGNOSIS CODE SET CONDITIONS

This code is set if the ID code is sent to the
immobilizer ECU from the ignition key when the
ignition switch is turned to the ON position.

POSSIBLE CAUSES

• Damaged harness wires and connectors

• Malfunction of ignition key

• Malfunction of immobilizer ECU

DIAGNOSIS PROCEDURE

Step 1. Check that the engine is started with
another registered ignition key.

Q: Is the check result normal?

YES :

Replace the ignition key that cannot start

the engine with new registered ignition key.
Refer to

P.54A-26

.

NO :

Go to Step 2.

Step 2. MUT-III diagnosis code

Check that the immobilizer ECU sets a diagnosis
code.

Q: Is the diagnosis code set?

YES (diagnosis cede No.11 is set) :

Replace the

immobilizer ECU and register the ignition
key.

YES (diagnosis cede No.12 is set) :

Code No.12

The ignition key is unregistered or ID codes
do not match. Refer to

P.54A-11

.

NO :

The procedure is complete.

Code No.12 The ignition key is unregistered or ID codes do not match.

DIAGNOSIS CODE SET CONDITIONS

This code is set when the ignition key is not
registered with the immobilzer ECU.

POSSIBLE CAUSES

• The ignition key is not registered with the

immobilzer ECU.

• Malfunction of immobilizer ECU

DIAGNOSIS PROCEDURE

Resister the encrypted code.

Q: Was the encrypted code registered?

YES :

The procedure is complete.

NO :

Replace the immobilizer ECU and register
the encrypted code. (Refer to

P.54A-26

.)

Ignition Key Ring and Immobilizer-ECU Circuit

HIGH-FREQENCY
CIRCUIT

POWER
SOURCE

IMMOBILIZER-
ECU

TRANSPONDER

IGNITION SWITCH

CHASSIS ELECTRICAL

54A-12

Trouble symptom chart

M1543007201321

CAUTION

During diagnosis, a diagnosis code associated
with other system may be set when the ignition
switch is turned on with connector(s)
disconnected. On completion, confirm all
systems for diagnosis code(s). If diagnosis
code(s) are set, erase them all.

Trouble symptom

Inspection
procedure No.

Reference page

Diagnosis code No.P0513 is set to the MPI system or the
immobilizer ECU cannot communicate with the MUT-III.

1

P.54A-13

The ignition key cannot be registered with the MUT-III.

2

P.54A-17

The engine does not start. (cranking occurs but initial
combustion does not)

3

P.54A-21

Check the power supply and earth circuit to the immobilizer
ECU.

4

P.54A-21

IGNITION SWITCH

CHASSIS ELECTRICAL

54A-13

SYMPTOM PROCEDURES

Inspection procedure: 1 Diagnosis code No.P0513 is set to the MPI system or the immobilizer ECU
cannot communicate with the MUT-III.

COMMENTS ON TROUBLE SYMPTOM

The immobilizer ECU communicates with the MUT-III
via the engine-ECU <M/T> or the engine-A/T-ECU.

The communication error between the immobilizer
ECU and the engine-ECU <M/T> or the
engine-A/T-ECU may be occurred.

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

ENGINE-ECU <M/T>
OR
ENGINE-A/T-ECU <A/T>

ENGINE
CONTROL
RELAY

IMMOBILIZER-
ECU

POWER
SOURCE

Immobilizer-ECU Power Source, Earth and Engine-ECU <M/T> or Engine-A/T-ECU <A/T> Communication Line Circuit

NOTE

: LH drive vehicles
: RH drive vehicles

IGNITION SWITCH

CHASSIS ELECTRICAL

54A-14

POSSIBLE CAUSES

• Malfunction of immobilizer ECU power supply

and earth

• Damaged harness wires between the

engine-ECU <M/T> or the engine-A/T-ECU and
the immobilizer ECU

DIAGNOSTIC PROCEDURE

Step 1. Connector check: Key reminder switch
connector C-308 and engine-ECU <M/T> or
engine-A/T-ECU <A/T> connector C-112

Q: Are key reminder switch connector C-308 and

engine-ECU <M/T> or engine-A/T-ECU <A/T>
connector C-112 in good condition?

YES :

Go to Step 2.

NO :

Repair the defective connector.

AC310615

AS

Harness side

Connector: C-112 <LHD>

C-112 (GR)

61

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71

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73

74

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76

77

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79

80

81

82

83

84

85

86

87

88

89

AC310628AW

Harness side

Connector: C-112 <RHD>

C-112 (GR)

61

62

63

64

65

66

67

68

69

70

71

72

73

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77

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79

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82

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87

88

89

AC310153AE

Connector: C-308 <LHD>

Harness side

AC310183

AE

Connector: C-308 <RHD>

Harness side