Mitsubishi Grandis. Manual — part 499

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-94

terminal No.2 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 29. 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.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 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.

STEP 30. 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 31 .

NO :

Repair the defective connector.

AC302572AD

Connector: A-07

Harness side

AC310613

AD

Connector: C-125 <LHD>

AC209365KB

Harness side: A-07

Test
harness

AC310613

AD

Connector: C-125 <LHD>

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-95

STEP 31. 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

the ignition switch to the ON position.

(3) Voltage between C-125 intermediate connector

terminal No.26 and body earth

OK: 4.0 V or less

Q: Is the check result normal?

YES :

<4.0 V or less> Go to Step 32.

NO :

<more than 4.0 V> Go to Step 49.

STEP 32. 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 33 .

NO :

Repair a defective connector or replace the
joint connector.

AC310613

AD

Connector: C-125 <LHD>

AC209365KC

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

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-96

STEP 33. 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.7 and body earth

OK: 4.0 V or less

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

terminal No.2 and body earth

OK: 4.0 V or less

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

terminal No.3 and body earth

OK: 4.0 V or less

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

terminal No.5 and body earth

OK: 4.0 V or less

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

AC310615

AU

Harness side

Connector: C-09 <LHD>

C-09 (GR)

AC209365KF

Harness side: C-09

Test harness

AC209365KH

Harness side: C-09

Test
harness

AC209365KI

Harness side: C-09

Test
harness

AC209365KJ

Harness side: C-09

Test harness

AC209365KK

Harness side: C-09

Test
harness

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-97

terminal No.1 and body earth

OK: 4.0 V or less

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

terminal No.8 and body earth

OK: 4.0 V or less

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

terminal No.6 and body earth

OK: 4.0 V or less

(10)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 48 .

NO <The voltage between terminal No.7 and body
earth is more than 4.0 V> :

Go to Step 34 .

NO <The voltage between terminal No.2 and body
earth is more than 4.0 V> :

Go to Step 35 .

NO <The voltage between terminal No.3 and body
earth is more than 4.0 V> :

Go to Step 37 .

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

Go to Step 39 .

NO <The voltage between terminal No.1 and body
earth is more than 4.0 V> :

Go to Step 43 .

NO <The voltage between terminal No.8 and body
earth is more than 4.0 V> :

Go to Step 45 .

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

Go to Step 47 .

STEP 34. 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)

AC209365KR

Harness side: C-09

Test harness

AC209365KL

Harness side: C-09

Test harness

AC310613

BB

Connector: C-02 <LHD>

Harness side

AC310615

AU

Harness side

Connector: C-09 <LHD>

C-09 (GR)

AC209365KF

Harness side: C-09

Test harness