Mitsubishi Grandis. Manual — part 620

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-578

Diagnostic Item 27: Diagnose the lines from the main bus line to the combination meter <RH drive
vehicles>

CAUTION

When servicing a CAN bus line, earth yourself by
touching a metal object such as an unpainted
water pipe. If you fail to do, a component
connected to the CAN bus line may be broken.

TROUBLE JUDGMENT

If the MUT-III can not received signals from the
combination meter, CAN bus line connector(s) are
broken or an open circuit has occurred.

COMMENTS ON TROUBLE SYMPTOM

The wiring harness wire or connectors may have
loose, corroded, or damage terminals, or terminals
pushed back in the connector, or the combination
meter may be defective.

ENGINE-ECU<M/T>
ENGINE·A/T-ECU<A/T>

COMBINATION
METER

Wire colour code
B : Black LG : Light green G : Green L : Blue W : White Y : Yellow SB : Sky blue
BR : Brown O : Orange GR : Gray R : Red P : Pink V : Violet

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-579

POSSIBLE CAUSES

• Damaged harness wires and connectors

• Malfunction of the combination meter

DIAGNOSTIC PROCEDURE

STEP 1. Connector check: C-09 joint connector
(CAN2) connector and C-02 combination meter
connector

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: Are the check result normal?

YES :

Go to Step 2 .

NO :

Repair a defective connector or replace the
joint connector.

STEP 2. Resistance measurement at C-09 joint
connector (CAN2) and C-02 combination meter
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 joint connector (CAN2) and the

combination meter 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

AC310631AX

Connector: C-02 <RHD>

Harness side

C-02

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

AC310631AX

Connector: C-02 <RHD>

Harness side

C-02

AC310628AY

Connector: C-09 <RHD>

C-09 (GR)

Harness side

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-580

disconnected.

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

terminal No.6 and C-02 combination meter

connector terminal No.24

OK: 2 ohms or less

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

terminal No.17 and C-02 combination meter
connector terminal No.23

OK: 2 ohms or less

CAUTION

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

P.54D-8

.

Q: Are the check result normal?

YES :

<All the resistances measure 2

Ω or less>

Power supply to the combination meter
connector may be suspected. Diagnose the
combination meter. Refer to

P.54A-55

.

NO :

<Either or all of the voltages measure more
than 2

Ω> Repair the wiring harness

between joint connector (CAN2) and the
combination meter connector.

AC312553 AJ

Harness side: C-09

Test
harness

Harness side: C-02

Test
harness

AC312553 AL

Harness side: C-09

Harness side: C-02

Test
harness

Test
harness

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-581

Diagnostic Item 28: Diagnose the lines from the main bus line to the centre display <LH drive
vehicles>

CAUTION

When servicing a CAN bus line, earth yourself by
touching a metal object such as an unpainted
water pipe. If you fail to do, a component
connected to the CAN bus line may be broken.

ENGINE-ECU<M/T>
ENGINE·A/T-ECU<A/T>

COMBINATION
METER

CENTER
DISPLAY

Wire colour code
B : Black LG : Light green G : Green L : Blue W : White Y : Yellow SB : Sky blue
BR : Brown O : Orange GR : Gray R : Red P : Pink V : Violet