Mitsubishi Grandis. Manual — part 563

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-350

disconnected.

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

terminal Nos. 3 and 6

OK: 120

± 20 Ω

Q: Is the check result normal?

YES :

<All the measurement results are within the

normal value> Follow diagnostic item 18
"Diagnose CAN bus lines thoroughly." Refer
to

P.54D-476

.

NO :

<The resistance between terminal Nos. 3
and 6 measures less than 120

± 20 Ω>

Repair the wiring harness between the joint
connector (CAN1) and the intermediate
connector.

STEP 37. Connector check: A-04 ASC-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 38.

NO :

Repair the defective connector.

AC204740

AC204740

AC204740

AC204740

AC204740

AC204740

AC204740DK

Harness side: A-07

Test
harness

Test
harness

AC310401

Connector: A-04 <LHD>

Harness side

AL

A-04

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-351

STEP 38. Resistance 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

ASC-ECU connector, and measure at the wiring
harness side.

(2) Ignition switch: OFF (LOCK)

CAUTION

When measuring the resistance, disconnect the
negative battery terminal. For details refer to

P.54D-8

.

(3) Ensure that the negative battery terminal is

disconnected.

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

terminal Nos. 2 and 5

OK: More than 2

Ω

CAUTION

Strictly observe the specified wiring harness
repair procedure. For details refer to

P.54D-8

.

Q: Is the check result normal?

YES :

<More than 2

Ω> Go to Step 39.

NO :

<2

Ω or less> Repair the wiring harness

between joint connector (CAN1) and the
ASC-ECU connector.

AC310401

Connector: A-04 <LHD>

Harness side

AL

A-04

AC302572AD

Connector: A-07

Harness side

AC204740

AC204740

AC204740

AC204740

AC204740

AC204740

AC204740DL

Harness side: A-07

Test
harness

Test
harness

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-352

STEP 39. Resistance measurement at A-04
ASC-ECU connector.

CAUTION

A digital multimeter should be used. For details
refer to

P.54D-8

.

(1) Connect special tool MB991974 to the ASC-ECU

connector, and measure by using the check
connector (connect the ECU side only).

(2) Resistance between special tool MB991974

check connector terminal Nos. 11 and 15.

OK: 1 k

Ω or more

Q: Is the check result normal?

YES :

<1 k

Ω or more> Follow diagnostic item 18,

Diagnose CAN bus lines thoroughly. Refer
to

P.54D-476

.

NO :

<Less than 1 k

Ω> Replace the ASC-ECU.

STEP 40. Resistance 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) Ignition switch: OFF (LOCK)

CAUTION

When measuring the resistance, disconnect the
negative battery terminal. For details refer to

P.54D-8

.

(3) Ensure that the negative battery terminal is

AC310401

Connector: A-04 <LHD>

Harness side

AL

A-04

AC304012

MB991984

Check connector

AC

ASC-ECU

AC204740

1

3

4

5

6

7

8

9

10

11

2

13 12

16

17

18

19

20

21

22

23

24

15

25

14

26

AC204740

AC204740

AC204740

AC204740BD

Special tool MB991974:
Check connector

Check
harness

AC302572AD

Connector: A-07

Harness side

AC310613

AD

Connector: C-125 <LHD>

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-353

disconnected.

(4) Measure the continuity between A-07 joint

connector (CAN1) terminal Nos. 1 and 4.

OK: More than 2

Ω

CAUTION

Strictly observe the specified wiring harness
repair procedure. For details refer to

P.54D-8

.

Q: Is the check result normal?

YES :

<2 more than

Ω> Follow diagnostic item 18,

Diagnose CAN bus lines thoroughly. Refer
to

P.54D-476

.

NO :

<2

Ω or less> Repair the wiring harness

between joint connector (CAN1) and the
intermediate connector.

AC204740

AC204740

AC204740

AC204740

AC204740

AC204740

AC204740DN

Harness side: A-07

Test
harness

Test
harness