Mitsubishi Grandis. Manual — part 493

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-70

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 17

"Diagnose CAN bus lines thoroughly." Refer
to

P.54D-452

.

NO :

<1.0 V or more> Repair the wiring harness
between the jumper connector and the
centre display connector.

STEP 41. Connector check: C-119 SRS-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 42 .

NO :

Repair the defective connector.

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)

AC310613

BD

Connector: C-119
<LHD>

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

AC310615

AU

Harness side

Connector: C-09 <LHD>

C-09 (GR)

AC310613

BD

Connector: C-119
<LHD>

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

AC209365KK

Harness side: C-09

Test
harness

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-71

terminal No.1 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 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)

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 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 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)

AC310615

AU

Harness side

Connector: C-09 <LHD>

C-09 (GR)

AC209365KL

Harness side: C-09

Test harness

AC310615

AU

Harness side

Connector: C-09 <LHD>

C-09 (GR)

AC209365KN

Harness side: C-09

Test
harness

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-72

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 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 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).

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)

AC302572AD

Connector: A-07

Harness side

AC302572AD

Connector: A-07

Harness side

AC209365KG

Harness side: A-07

Test harness

AC209365KM

Harness side: A-07

Test harness

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-73

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 50 .

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.

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.

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