Mitsubishi Grandis. Manual - part 509

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-134

STEP 42. 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 joint connector (CAN2) and the 

SRS-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 C-09 joint connector (CAN2) 

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 19 

"Diagnose CAN bus lines thoroughly." Refer 
to 

P.54D-502

.

NO : 

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

STEP 43. 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) 

AC310628AY

Connector: C-09 <RHD>

C-09 (GR)

Harness side

AC310631AZ

Connector: C-119 <RHD>

Harness side

C-119 (Y)

48

37

26

42

31

45

34

47

36

46

35

44

33

43

32

25 24

39

28

41

30

40

29

38

27

23

21

22

A

B

AC209365KN

Harness side: C-09

Test
harness

AC310628AY

Connector: C-09 <RHD>

C-09 (GR)

Harness side

AC209365KF

Harness side: C-09

Test harness

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-135

terminal No.7 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 19 

"Diagnose CAN bus lines thoroughly." Refer 
to 

P.54D-502

.

NO : 

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

STEP 44. 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.11 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 19 

"Diagnose CAN bus lines thoroughly." Refer 
to 

P.54D-502

.

NO : 

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

STEP 45. 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 46 .

NO : 

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

AC310628AY

Connector: C-09 <RHD>

C-09 (GR)

Harness side

AC209365KV

Harness side: C-09

Test harness

AC302572AD

Connector: A-07

Harness side

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-136

STEP 46. 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.6 and body earth

OK: 4.0 V or less

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

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 52 .

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

Go to Step 47 .

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

Go to Step 48 .

STEP 47. 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 48 .

NO : 

Repair the defective connector.

AC302572AD

Connector: A-07

Harness side

AC209365KG

Harness side: A-07

Test harness

AC209365KM

Harness side: A-07

Test harness

AC310398

AC

Connector: A-16 <RHD>

A-16 (B)

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-137

STEP 48. 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.

Q: Is the check result normal?

YES : 

<1.0 V or less> Go to Step 49.

NO : 

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

STEP 49. 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 intermediate connector and the 

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

AC310398

AC

Connector: A-16 <RHD>

A-16 (B)

AC209365KG

Harness side: A-07

Test harness

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

AC209365KO

Male side: A-16

Test
harness