Mitsubishi Grandis. Manual — part 488

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-50

the ignition switch to the ON position.

(3) Voltage between C-126 diagnosis connector

terminal No.14 and body earth

OK: 4.0 V or less

(4) Voltage between C-126 diagnosis connector

terminal No.6 and body earth

OK: 4.0 V or less

(5) Disconnect the negative battery terminal.

Q: Is the check result normal?

YES <all of the measurement results show 4.0 V or
less> :

Follow diagnostic Item 17, Diagnose CAN

bus lines thoroughly. Refer to

P.54D-452

.

NO <The voltage between terminal No.14 and body
earth is more than 4.0 V> :

Go to Step 3 .

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

Go to Step 28 .

STEP 3. Connector check: C-125 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 4 .

NO :

Repair the defective connector.

STEP 4. Voltage measurement at the C-125
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 connector, and measure at its

male-side intermediate connector (at the front
wiring harness side).

(2) Connect the negative battery terminal, and turn

AC209365JP

8

16

15

7

5

13 14

6

12

4

2

10 11

3

9

1

Harness side: C-126
(Front side)

Test
Harness

AC209365

Harness side: C-126
(Front side)

Test
harness

JO

Y

8

16

15

7

5

1314

6

12

4

2

1011

3

9

1

AC310613

AD

Connector: C-125 <LHD>

AC310613

AD

Connector: C-125 <LHD>

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-51

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.18 and body earth

OK: 4.0 V or less

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

AC209365JQ

Male side: C-125

Test harness

AC310615

AU

Harness side

Connector: C-09 <LHD>

C-09 (GR)

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

AC310615

AU

Harness side

Connector: C-09 <LHD>

C-09 (GR)

AC209365JR

Harness side: C-09

Test
harness

AC209365JW

Harness side: C-09

Test
harness

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-52

terminal No.13 and body earth

OK: 4.0 V or less

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

terminal No.14 and body earth

OK: 4.0 V or less

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

terminal No.16 and body earth

OK: 4.0 V or less

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

terminal No.12 and body earth

OK: 4.0 V or less

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

terminal No.17 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.18 and body
earth is more than 4.0 V> :

Go to Step 7 .

NO <The voltage between terminal No.13 and body
earth is more than 4.0 V> :

Go to Step 8 .

NO <The voltage between terminal No.14 and body
earth is more than 4.0 V> :

Go to Step 10 .

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

Go to Step 12 .

NO <The voltage between terminal No.12 and body
earth is more than 4.0 V> :

Go to Step 16 .

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

Go to Step 18 .

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

AC209365JS

Harness side: C-09

Test
harness

AC209365JT

Harness side: C-09

Test
harness

AC209365JU

Harness side: C-09

Test
harness

AC209365JV

Harness side: C-09

Test
harness

AC310615

AU

Harness side

Connector: C-09 <LHD>

C-09 (GR)

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-53

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.18 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 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.

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)

AC209365JR

Harness side: C-09

Test
harness

AC310613

AB

Connector: C-106 <LHD>

Harness side

AC310615

AU

Harness side

Connector: C-09 <LHD>

C-09 (GR)

AC310613

AB

Connector: C-106 <LHD>

Harness side

AC209365JW

Harness side: C-09

Test
harness