Mitsubishi Grandis. Manual — part 547

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-286

intermediate connector, and measure at the
wiring harness side.

CAUTION

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

P.54D-8

.

(2) Ensure that the negative battery terminal is

disconnected.

(3) Resistance between A-16 intermediate connector

terminal No.12 and body earth

OK: 1 k

Ω or more

CAUTION

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

P.54D-8

.

Q: Is the check result normal?

YES :

<1 k

Ω or more> Follow diagnostic item 20,

Diagnose CAN bus lines thoroughly. Refer
to

P.54D-526

.

NO :

<less than 1

Ω> Repair the wiring harness

between the intermediate connector and the
engine-ECU <M/T> or engine-A/T-ECU
<A/T> connector.

STEP 27. 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 28.

NO :

Repair the defective connector.

STEP 28. 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.

CAUTION

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

P.54D-8

.

(2) Ensure that the negative battery terminal is

AC209364

AC209364

AC209364

Male side: A-16

AC209364EF

Test
harness

AC310398

AJ

Connector: A-04 <RHD>

A-04

Harness side

AC302572AD

Connector: A-07

Harness side

AC310398

AJ

Connector: A-04 <RHD>

A-04

Harness side

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-287

disconnected.

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

terminal No.2 and body earth

OK: 1 k

Ω or more

CAUTION

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

P.54D-8

.

Q: Is the check result normal?

YES :

<1 k

Ω or more> Follow diagnostic item 20,

Diagnose CAN bus lines thoroughly. Refer
to

P.54D-526

.

NO :

<less than 1 k

Ω> Repair the wiring harness

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

STEP 29. 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.

CAUTION

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

P.54D-8

.

(2) Ensure that the negative battery terminal is

AC209364

Harness side: A-07

AC209364LO

Test
harness

AC302572AD

Connector: A-07

Harness side

AC310628AB

Connector: C-125 <RHD>

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-288

disconnected.

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

terminal No.1 and body earth

OK: 1 k

Ω or more

CAUTION

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

P.54D-8

.

Q: Is the check result normal?

YES :

<1 k

Ω or more> Follow diagnostic item 20,

Diagnose CAN bus lines thoroughly. Refer
to

P.54D-526

.

NO :

<less than 1 k

Ω> 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.

STEP 31. Resistance 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).

CAUTION

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

P.54D-8

.

(2) Ensure that the negative battery terminal is

disconnected.

(3) Resistance between C-125 intermediate

connector terminal No.26 and body earth

OK: 1 k

Ω or more

Q: Is the check result normal?

YES :

<1 k

Ω or more> Go to Step 32.

NO :

<less than 1 k

Ω> Go to Step 49.

AC209364

AC209364

AC209364

AC209364

Harness side: A-07

AC209364LQ

Test
harness

AC310628AB

Connector: C-125 <RHD>

AC310628AB

Connector: C-125 <RHD>

AC209364

Male side: C-125

Test harness

AC209364

AC209364

AC209364

AC209364

AC209364LR

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-289

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.

STEP 33. Resistance 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.

CAUTION

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

P.54D-8

.

(2) Ensure that the negative battery terminal is

disconnected.

(3) Resistance between C-09 joint connector (CAN2)

terminal No.6 and body earth

OK: 1 k

Ω or more

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

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

AC209364LX

Harness side: C-09

Test
harness

AC209364ME

Harness side: C-09

Test harness