Mitsubishi Grandis. Manual - part 596

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-482

diagnose by using the MUT-III.

(2) Check that the MUT-III indications correspond to 

the illustration.

Q: Is the check result normal?

YES : 

<MUT-III indications correspond to the 

illustration> Go to Step 10  .

NO : 

<MUT-III indications do not correspond to 
the illustration> Go to Step 11 .

STEP 10. Resistance measurement at C-09 joint 
connector (CAN2) and C-106 A/C-ECU connector.

CAUTION

A digital multimeter should be used. For details 
refer to 

P.54D-8

.

CAUTION

The test wiring harness should be used. For 
details refer to 

P.54D-8

.

(1) Disconnect the joint connector (CAN2) and the 

A/C-ECU connector, and measure at the wiring 
harness side.

(2) Ignition switch: OFF (LOCK)

CAUTION

When measuring the resistance, disconnect the 
negative battery terminal. For details refer to 

P.54D-8

.

(3) Ensure that the negative battery terminal is 

disconnected.

(4) Continuity between C-09 joint connector (CAN2) 

terminal No.2 and C-106 A/C-ECU connector 

AC309834

MUT

J/C (2)

METER

ETAC S

J/C (1)

ASC -ECU

ENG/AT-ECU

A/C -ECU

SRS-ECU

STR. A .

SNSR

C. DISPL AY

AO

 : Red section 

   on screen

AC310615

AU

Harness side

Connector: C-09 <LHD>

C-09 (GR)

AC310613

AB

Connector: C-106 <LHD>

Harness side

AC312553

Harness side: C-106

Test
harness

BA

Harness side: C-09

Test
harness

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-483

terminal No.8

OK: 2 

Ω or less

(5) Continuity between C-09 joint connector (CAN2) 

terminal No.13 and C-106 A/C-ECU connector 
terminal No.9

OK: 2 

Ω or less

CAUTION

Strictly observe the specified wiring harness 
repair procedure. For details refer to 

P.54D-8

.

Q: Are the check results normal?

YES : 

<All the resistances measure 2 

Ω or less> 

Power supply to the A/C-ECU may be 
suspected. Diagnose the air conditioner 
system. Refer to 

P.55-178

.

NO : 

<Either or all of the resistances measure 
more than 2 

Ω> Repair the wiring harness 

between the joint connector (CAN2) and the 
A/C-ECU connector.

STEP 11. Connector check: C-221 ETACS-ECU 
connector

CAUTION

The strand end of the twist wire should be within 
10 cm from the connector. For details refer to 

P.54D-8

.

Q: Is the check result normal?

YES : 

Go to Step 12 .

NO : 

Repair the defective connector.

STEP 12. MUT-III CAN bus diagnostics (C-221 
ETACS-ECU connector disconnected)

(1) Disconnect the ETACS-ECU connector, and 

diagnose by using the MUT-III.

(2) Check that the MUT-III indications correspond to 

the illustration.

Q: Is the check result normal?

AC312553

Harness side: C-106

Test
harness

BC

Harness side: C-09

Test
harness

AC310626

Connector: C-221

Junction block (Rear view)

<LHD>

AC

51

52

53

54

55

56

57

58

59

60

61

62

63

64

65

66

67

68

69

70

71

72

73

74

Harness side

C-221(GR)

AC310626

Connector: C-221

Junction block (Rear view)

<LHD>

AC

51

52

53

54

55

56

57

58

59

60

61

62

63

64

65

66

67

68

69

70

71

72

73

74

Harness side

C-221(GR)

AC309834

MUT

J/C (2)

METER

ETAC S

J/C (1)

ASC -ECU

ENG/AT-ECU

A/C -ECU

SRS-ECU

STR. A .

SNSR

C. DISPL AY

AL

 : Red section 

   on screen

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-484

YES : 

<MUT-III indications correspond to the 

illustration> Go to Step 13  .

NO : 

<MUT-III indications do not correspond to 
the illustration> Go to Step 14 .

STEP 13. Resistance measurement at C-09 joint 
connector (CAN2) and C-221 ETACS-ECU 
connector.

CAUTION

A digital multimeter should be used. For details 
refer to 

P.54D-8

.

CAUTION

The test wiring harness should be used. For 
details refer to 

P.54D-8

.

(1) Disconnect the joint connector (CAN2) and the 

ETACS-ECU connector, and measure at the 
wiring harness side.

(2) Ignition switch: OFF (LOCK)

CAUTION

When measuring the resistance, disconnect the 
negative battery terminal. For details refer to 

P.54D-8

.

(3) Ensure that the negative battery terminal is 

disconnected.

(4) Continuity between C-09 joint connector (CAN2) 

terminal No.3 and C-221 ETACS-ECU connector 
terminal No.72

OK: 2 

Ω or less

(5) Continuity between C-09 joint connector (CAN2) 

terminal No.14 and C-221 ETACS-ECU 

AC310615

AU

Harness side

Connector: C-09 <LHD>

C-09 (GR)

AC310626

Connector: C-221

Junction block (Rear view)

<LHD>

AC

51

52

53

54

55

56

57

58

59

60

61

62

63

64

65

66

67

68

69

70

71

72

73

74

Harness side

C-221(GR)

AC312553 BE

Harness side: C-09

Test
harness

Harness side: C-221

Test
harness

AC312553 BG

Harness side: C-09

Harness side: C-221

Test
harness

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-485

connector terminal No.73

OK: 2 

Ω or less

CAUTION

Strictly observe the specified wiring harness 
repair procedure. For details refer to 

P.54D-8

.

Q: Are the check results normal?

YES : 

<All the resistances measure 2 

Ω or less> 

Power supply to the ETACS-ECU may be 
suspected. Diagnose the SWS. Refer to 

P.54B-87

.

NO : 

<Either or all of the resistances measure 
more than 2 

Ω> Repair the wiring harness 

between the joint connector (CAN2) and the 
ETACS-ECU connector.

STEP 14. Connector check: C-07 centre display 
connector

CAUTION

The strand end of the twist wire should be within 
10 cm from the connector. For details refer to 

P.54D-8

.

Q: Is the check result normal?

YES : 

Go to Step 15 .

NO : 

Repair the defective connector.

STEP 15. MUT-III CAN bus diagnostics (C-07 
centre display connector disconnected)

(1) Disconnect the centre display connector, and 

diagnose by using the MUT-III.

(2) Check that the MUT-III indications correspond to 

the illustration.

Q: Is the check result normal?

YES : 

<MUT-III indications correspond to the 

illustration> Go to Step 16  .

NO : 

<MUT-III indications do not correspond to 
the illustration> Go to Step 27 .

STEP 16. Connector check: C-37 jumper 
connector

CAUTION

The strand end of the twist wire should be within 
10 cm from the connector. For details refer to 

P.54D-8

.

Check that the wiring harness of the jumper 
connector is not damaged.

Q: Is the check result normal?

YES : 

Go to Step 17 .

NO : 

Repair the defective connector.

AC310613

BC

Connector: C-07 <LHD>

Harness side

C-07 (B)

AC310613

BC

Connector: C-07 <LHD>

Harness side

C-07 (B)

AC309834

MUT

J/C (2)

METER

ETAC S

J/C (1)

ASC -ECU

ENG/AT-ECU

A/C -ECU

SRS-ECU

STR. A .

SNSR

C. DISPL AY

AP

 : Red section 

   on screen

AC310615

AV

Connector: C-37 <LHD>