Mitsubishi Grandis. Manual — part 502

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-106

terminal No.5 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 56 .

NO <The voltage between terminal No.6 and body
earth is more than 4.0 V> :

Go to Step 51 .

NO <The voltage between terminal No.5 and body
earth is more than 4.0 V> :

Go to Step 54 .

STEP 51. 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 52 .

NO :

Repair the defective connector.

STEP 52. 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.6 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)

AC209365KG

Harness side: A-07

Test harness

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-107

Q: Is the check result normal?

YES :

<1.0 V or less> Go to Step 53.

NO :

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

STEP 53. 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

terminal No.6 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 54. 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 55 .

NO :

Repair the defective connector.

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

AC209365KO

Male side: A-16

Test
harness

AC310401

Connector: A-04 <LHD>

Harness side

AL

A-04

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-108

STEP 55. 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)

terminal No.5 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 (CAN1) and the
ASC-ECU connector.

STEP 56. 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

AC310401

Connector: A-04 <LHD>

Harness side

AL

A-04

AC302572AD

Connector: A-07

Harness side

AC209365KM

Harness side: A-07

Test harness

AC302572AD

Connector: A-07

Harness side

AC310613

AD

Connector: C-125 <LHD>

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-109

the ignition switch to the ON position.

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

terminal No.4 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 (CAN1) and the
intermediate connector.

AC209365KP

Harness side: A-07

Test harness