Mitsubishi Grandis. Manual - part 572

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-386

equipment side.

(2) Resistance between C-106 A/C-ECU connector 

terminal Nos. 8 and 9

OK: 1 k

Ω or more

Q: Is the check result normal?

YES : 

<1 k

Ω or more> Follow diagnostic item 20, 

Diagnose CAN bus lines thoroughly. Refer 
to 

P.54D-526

.

NO : 

<Less than 1 k

Ω> Replace the A/C-ECU.

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. Resistance measurement at C-09 joint 
connector (CAN2).

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 

AC204740

AC204740

AC204740

AC204740

AC204740

AC204740

AC204740

AC204740DT

Equipment side: C-106

Test
harness

AC310620

Connector: C-221

Junction block 
(Rear view)

<RHD>

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)

AC310628AY

Connector: C-09 <RHD>

C-09 (GR)

Harness side

AC310620

Connector: C-221

Junction block 
(Rear view)

<RHD>

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)

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-387

disconnected.

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

terminal Nos. 5 and 16

OK: More than 2 

Ω

CAUTION

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

P.54D-8

.

Q: Is the check result normal?

YES : 

<More than 2 

Ω> Go to Step 13.

NO : 

<2 

Ω or less> Repair the wiring harness 

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

STEP 13. Resistance measurement at C-221 
ETACS-ECU connector.

CAUTION

A digital multimeter should be used. For details 
refer to 

P.54D-8

.

(1) Remove the ETACS-ECU, and measure at the 

equipment side.

(2) Resistance between C-221 ETACS-ECU 

connector terminal Nos. 72 and 73

OK: 1 k

Ω or more

Q: Is the check result normal?

YES : 

<1 k

Ω or more> Follow diagnostic item 20, 

Diagnose CAN bus lines thoroughly. Refer 
to 

P.54D-526

.

NO : 

<Less than 1 k

Ω> Replace the 

ETACS-ECU.

AC204740DG

Harness side: C-09

Test
harness

Test
harness

AC310620

Connector: C-221

Junction block 
(Rear view)

<RHD>

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)

AC204740

69

60

51

55

64

71

62

53

61

70

52

63

54

73

67

66

65

72

56 57

68

74

59

58

AC204740

AC204740

AC204740

AC204740

AC204740DU

Equipment side: C-221

Test
harness

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-388

STEP 14. 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 15.

NO : 

Repair the defective connector.

STEP 15. Resistance measurement at the C-37 
jumper 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 connector, and measure at its 

jumper connector (at the centre display 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) Resistance between C-37 jumper connector 

terminal Nos. 3 and 4

OK: 1 k

Ω or more

Q: Is the check result normal?

YES : 

<1 k

Ω or more> Go to Step 19 .

NO : 

<Less than 1 k

Ω> Go to Step 16 .

STEP 16. 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 17 .

NO : 

Repair the defective connector.

AC310628AZ

Connector: C-37 <RHD>

AC310628AZ

Connector: C-37 <RHD>

AC312553 AF

Harness side: C-37

Test 
harness

Test 
harness

AC310631AY

Connector: C-07 <RHD>

Harness side

C-07 (B)

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-389

STEP 17. Resistance measurement at the C-37 
jumper 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 centre display connector and the 

jumper connector, and measure at the jumper 
connector (at the centre display 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) Resistance between C-37 jumper connector 

terminal Nos. 3 and 4

OK: More than 2 

Ω

CAUTION

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

P.54D-8

.

Q: Is the check result normal?

YES : 

<More than 2 

Ω> Go to Step 18.

NO : 

<2 

Ω or less> Repair the wiring harness 

between the jumper connector and the 
centre display connector.

STEP 18. Resistance measurement at C-07 centre 
display connector.

CAUTION

A digital multimeter should be used. For details 
refer to 

P.54D-8

.

(1) Remove the centre display connector, and 

AC310631AY

Connector: C-07 <RHD>

Harness side

C-07 (B)

AC310628AZ

Connector: C-37 <RHD>

AC312553 AF

Harness side: C-37

Test 
harness

Test 
harness

AC310631AY

Connector: C-07 <RHD>

Harness side

C-07 (B)