Mitsubishi Grandis. Manual — part 490

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-58

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 17

"Diagnose CAN bus lines thoroughly." Refer
to

P.54D-452

.

NO :

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

STEP 18. 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.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 17

"Diagnose CAN bus lines thoroughly." Refer
to

P.54D-452

.

NO :

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

STEP 19. 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)

AC310615

AU

Harness side

Connector: C-09 <LHD>

C-09 (GR)

AC209365JV

Harness side: C-09

Test
harness

AC310615

AU

Harness side

Connector: C-09 <LHD>

C-09 (GR)

AC209365JX

Harness side: C-09

Test
harness

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-59

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 17

"Diagnose CAN bus lines thoroughly." Refer
to

P.54D-452

.

NO :

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

STEP 20. 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 21 .

NO :

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

STEP 21. 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)

AC302572AD

Connector: A-07

Harness side

AC302572AD

Connector: A-07

Harness side

AC209365JY

Harness side: A-07

Test
harness

AC209365JZ

Harness side: A-07

Test
harness

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-60

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 27 .

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

Go to Step 22 .

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

Go to Step 25 .

STEP 22. 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 23 .

NO :

Repair the defective connector.

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 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.

AC310403

AC

Connector: A-16 <LHD>

A-16 (B)

AC302572AD

Connector: A-07

Harness side

AC310403

AC

Connector: A-16 <LHD>

A-16 (B)

AC209365JY

Harness side: A-07

Test
harness

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-61

Q: Is the check result normal?

YES :

<1.0 V or less> Go to Step 24.

NO :

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

STEP 24. 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 its
male-side intermediate connector (at the control
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

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 17

"Diagnose CAN bus lines thoroughly." Refer
to

P.54D-452

.

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 25. Connector check: A-03 ABS-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 26 .

NO :

Repair the defective connector.

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

AC310403

AC

Connector: A-16 <LHD>

A-16 (B)

AC209365KA

Male side: A-16

Test
harness

AC310401

Connector: A-03 <LHD>

Harness side

AK