Mitsubishi Grandis. Manual — part 504

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-114

the ignition switch to the ON position.

(3) Voltage between C-125 intermediate connector

terminal No.27 and body earth

OK: 4.0 V or less

Q: Is the check result normal?

YES :

<4.0 V or less> Go to Step 5.

NO :

<more than 4.0 V> Go to Step 20.

STEP 5. Connector check: C-09 joint connector
(CAN2)

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 and its short pins are not
damaged.

Q: Is the check result normal?

YES :

Go to Step 6 .

NO :

Repair a defective connector or replace the
joint connector.

STEP 6. 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: 4.0 V or less

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

AC209365JQ

Male side: C-125

Test harness

AC310628AY

Connector: C-09 <RHD>

C-09 (GR)

Harness side

AC209350

1

12

2

13

3

14

4

15

5

16

6

17

7

18

8

19

9

20

10

21

11

22

AB

Short pin

AC310628AY

Connector: C-09 <RHD>

C-09 (GR)

Harness side

AC209365JV

Harness side: C-09

Test
harness

AC209365KQ

Harness side: C-09

Test
harness

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-115

terminal No.19 and body earth

OK: 4.0 V or less

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

terminal No.16 and body earth

OK: 4.0 V or less

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

terminal No.20 and body earth

OK: 4.0 V or less

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

terminal No.15 and body earth

OK: 4.0 V or less

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

terminal No.18 and body earth

OK: 4.0 V or less

(9) 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 19 .

NO <The voltage between terminal No.17 and body
earth is more than 4.0 V> :

Go to Step 7 .

NO <The voltage between terminal No.19 and body
earth is more than 4.0 V> :

Go to Step 8 .

NO <The voltage between terminal No.16 and body
earth is more than 4.0 V> :

Go to Step 10 .

NO <The voltage between terminal No.20 and body
earth is more than 4.0 V> :

Go to Step 12 .

NO <The voltage between terminal No.15 and body
earth is more than 4.0 V> :

Go to Step 16 .

NO <The voltage between terminal No.18 and body
earth is more than 4.0 V> :

Go to Step 18 .

AC209365JT

Harness side: C-09

Test
harness

AC209365KS

Harness side: C-09

Test
harness

AC209365JX

Harness side: C-09

Test
harness

AC209365JR

Harness side: C-09

Test
harness

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-116

STEP 7. 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

combination meter 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 19

"Diagnose CAN bus lines thoroughly." Refer
to

P.54D-502

.

NO :

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

STEP 8. Connector check: C-106 A/C-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 9 .

NO :

Repair the defective connector.

AC310631AX

Connector: C-02 <RHD>

Harness side

C-02

AC310628AY

Connector: C-09 <RHD>

C-09 (GR)

Harness side

AC209365JV

Harness side: C-09

Test
harness

AC310631AB

Connectors: C-106 <RHD>

Harness side

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-117

STEP 9. 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

A/C-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.19 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
A/C-ECU connector.

STEP 10. Connector check: C-221 ETACS-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 11 .

NO :

Repair the defective connector.

AC310631AX

Connector: C-02 <RHD>

Harness side

C-02

AC310628AY

Connector: C-09 <RHD>

C-09 (GR)

Harness side

AC209365KQ

Harness side: C-09

Test
harness

AC310620

Connector: C-221

Junction block
(Rear view)

<RHD>

AC

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52

53

54

55

56

57

58

59

60

61

62

63

64

65

66

67

68

69

70

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74

Harness side

C-221(GR)