Mitsubishi Grandis. Manual — part 575

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-398

STEP 33. Connector check: C-112 engine-ECU
<M/T> or engine-A/T-ECU <A/T> 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 34.

NO :

Repair the defective connector.

STEP 34. Resistance measurement at the A-16
intermediate 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 engine-ECU <M/T> or

engine-A/T-ECU <A/T> connector and the
intermediate 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) Resistance between A-16 intermediate connector

terminal Nos. 6 and 12

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 35.

NO :

<2

Ω or less> Repair the wiring harness

between the intermediate connector and the
engine-ECU <M/T> or engine-A/T-ECU
<A/T> connector.

AC310628AW

Harness side

Connector: C-112 <RHD>

C-112 (GR)

61

62

63

64

65

66

67

68

69

70

71

72

73

74

75

76

77

78

79

80

81

82

83

84

85

86

87

88

89

AC310398

AC

Connector: A-16 <RHD>

A-16 (B)

AC310628AW

Harness side

Connector: C-112 <RHD>

C-112 (GR)

61

62

63

64

65

66

67

68

69

70

71

72

73

74

75

76

77

78

79

80

81

82

83

84

85

86

87

88

89

AC204740

AC204740

AC204740

AC204740DM

Male side: A-16

Test
harness

Test
harness

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-399

STEP 35. Resistance measurement at C-112
engine-ECU <M/T> or engine-A/T-ECU <A/T>
connector.

CAUTION

A digital multimeter should be used. For details
refer to

P.54D-8

.

(1) Remove the engine-ECU <M/T> or

engine-A/T-ECU <A/T>, and measure at the
equipment side.

(2) Resistance at C-112 engine-ECU <M/T> or

engine-A/T-ECU <A/T> connector terminal Nos.
61 and 62

OK: 120

± 20 Ω

Q: Is the check result normal?

YES :

<Within 120

± 20 Ω> Follow diagnostic item

20, Diagnose CAN bus lines thoroughly.
Refer to

P.54D-526

.

NO :

<Not within 120

± 20 Ω> Replace the

engine-ECU <M/T> or engine-A/T-ECU
<A/T>.

STEP 36. Resistance measurement at the A-07
joint connector (CAN1).
NOTE: When checking A-07 joint connector (CAN1),
disassemble and check the engine compartment
relay box by referring to

P.54D-616

.

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 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

AC310628AW

Harness side

Connector: C-112 <RHD>

C-112 (GR)

61

62

63

64

65

66

67

68

69

70

71

72

73

74

75

76

77

78

79

80

81

82

83

84

85

86

87

88

89

AC312553

Equipment side: C-112

Test
harness

AC

Test
harness

AC302572AD

Connector: A-07

Harness side

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-400

disconnected.

(4) Resistance between A-07 joint connector (CAN1)

terminal Nos. 3 and 6

OK: 120

± 20 Ω

Q: Is the check result normal?

YES :

<All the measurement results are within the

normal value> Follow diagnostic item 20
"Diagnose CAN bus lines thoroughly." Refer
to

P.54D-526

.

NO :

<The resistance between terminal Nos. 3
and 6 measures less than 120

± 20 Ω>

Repair the wiring harness between the joint
connector (CAN1) and the intermediate
connector.

STEP 37. Connector check: A-04 ASC-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 38.

NO :

Repair the defective connector.

AC204740

AC204740

AC204740

AC204740

AC204740

AC204740

AC204740DK

Harness side: A-07

Test
harness

Test
harness

AC310398

AJ

Connector: A-04 <RHD>

A-04

Harness side

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-401

STEP 38. Resistance measurement at the A-07
joint connector (CAN1).
NOTE: When checking A-07 joint connector (CAN1),
disassemble and check the engine compartment
relay box by referring to

P.54D-616

.

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 (CAN1) and the

ASC-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 A-07 joint connector (CAN1)

terminal Nos. 2 and 5

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 39.

NO :

<2

Ω or less> Repair the wiring harness

between joint connector (CAN1) and the
ASC-ECU connector.

AC302572AD

Connector: A-07

Harness side

AC310398

AJ

Connector: A-04 <RHD>

A-04

Harness side

AC204740

AC204740

AC204740

AC204740

AC204740

AC204740

AC204740DL

Harness side: A-07

Test
harness

Test
harness