Mitsubishi Grandis. Manual — part 498

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-90

terminal No.17 and body earth

OK: Less than 1.0 V

(4) Disconnect the negative battery terminal.

CAUTION

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

P.54D-8

.

Q: Is the check result normal?

YES :

<less than 1.0 V> Follow diagnostic item 18

"Diagnose CAN bus lines thoroughly." Refer
to

P.54D-476

.

NO :

<1.0 V or more> Repair the wiring harness
between the joint connector (CAN2) and the
diagnosis connector.

STEP 21. Voltage 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 connector, and measure at the

wiring harness side.

(2) Connect the negative battery terminal, and turn

the ignition switch to the ON position.

(3) Voltage between C-09 joint connector (CAN2)

terminal No.15 and body earth

OK: Less than 1.0 V

(4) Disconnect the negative battery terminal.

CAUTION

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

P.54D-8

.

Q: Is the check result normal?

YES :

<less than 1.0 V> Follow diagnostic item 18

"Diagnose CAN bus lines thoroughly." Refer
to

P.54D-476

.

NO :

<1.0 V or more> Repair the wiring harness
between the joint connector (CAN2) and the
intermediate connector.

STEP 22. Connector check: 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

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

P.54D-8

.

When checking the joint connector, ensure that its
wiring harness side is not damaged.

Q: Is the check result normal?

YES :

Go to Step 23 .

NO :

Repair a defective connector or replace the
joint connector (front wiring harness
assembly).

AC310615

AU

Harness side

Connector: C-09 <LHD>

C-09 (GR)

AC209365JX

Harness side: C-09

Test
harness

AC302572AD

Connector: A-07

Harness side

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-91

STEP 23. Voltage 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) Connect the negative battery terminal, and turn

the ignition switch to the ON position.

(3) Voltage between A-07 joint connector (CAN1)

terminal No.3 and body earth

OK: 4.0 V or less

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

terminal No.2 and body earth

OK: 4.0 V or less

(5) Disconnect the negative battery terminal.

Q: Are the check result normal?

YES <all of the measurement results show 4.0 V or
less> :

Go to Step 29 .

NO <The voltage between terminal No.3 and body
earth is more than 4.0 V> :

Go to Step 24 .

NO <The voltage between terminal No.2 and body
earth is more than 4.0 V> :

Go to Step 27 .

STEP 24. Connector check: A-16 intermediate
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 25 .

NO :

Repair the defective connector.

AC302572AD

Connector: A-07

Harness side

AC209365JY

Harness side: A-07

Test
harness

AC209365JZ

Harness side: A-07

Test
harness

AC310403

AC

Connector: A-16 <LHD>

A-16 (B)

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-92

STEP 25. Voltage 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

intermediate connector, and measure at the
wiring harness side.

(2) Connect the negative battery terminal, and turn

the ignition switch to the ON position.

(3) Voltage between A-07 joint connector (CAN1)

terminal No.3 and body earth

OK: 1.0 V or less

(4) Disconnect the negative battery terminal.

Q: Is the check result normal?

YES :

<1.0 V or less> Go to Step 26.

NO :

<more than 1.0 V> Repair the wiring
harness between the joint connector
(CAN1) and the intermediate connector.

STEP 26. Voltage 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) Connect the negative battery terminal, and turn

the ignition switch to the ON position.

(3) Voltage between A-16 intermediate connector

AC302572AD

Connector: A-07

Harness side

AC310403

AC

Connector: A-16 <LHD>

A-16 (B)

AC209365JY

Harness side: A-07

Test
harness

AC310403

AC

Connector: A-16 <LHD>

A-16 (B)

AC310615

AS

Harness side

Connector: C-112 <LHD>

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

AC209365KA

Male side: A-16

Test
harness

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-93

terminal No.12 and body earth

OK: Less than 1.0 V

(4) Disconnect the negative battery terminal.

CAUTION

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

P.54D-8

.

Q: Is the check result normal?

YES :

<less than 1.0 V> Follow diagnostic item 18

"Diagnose CAN bus lines thoroughly." Refer
to

P.54D-476

.

NO :

<1.0 V or more> Repair the wiring harness
between the intermediate connector and the
engine-ECU <M/T> or engine-A/T-ECU
<A/T> connector.

STEP 27. 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 28 .

NO :

Repair the defective connector.

STEP 28. Voltage 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) Connect the negative battery terminal, and turn

the ignition switch to the ON position.

(3) Voltage between A-07 joint connector (CAN1)

AC310401

Connector: A-04 <LHD>

Harness side

AL

A-04

AC310401

Connector: A-04 <LHD>

Harness side

AL

A-04

AC302572AD

Connector: A-07

Harness side

AC209365JZ

Harness side: A-07

Test
harness