Mitsubishi Grandis. Manual - part 584

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-434

Diagnostic Item 15: Diagnose the terminator resistor at one end <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.

TROUBLE JUDGMENT

The terminator resistor at one end of CAN bus lines 
is damaged when the resistance between the CAN 
bus lines (CAN_L and H lines) is 120 

± 20 Ω.

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 or the engine-A/T-ECU 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-435

TROUBLESHOOTING HINTS

• Damaged harness wires and connectors

• Malfunction of the combination meter

• Malfunction of the engine-ECU <M/T> or 

engine-A/T-ECU <A/T>

DIAGNOSTIC PROCEDURE

STEP 1. 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 2 .

NO : 

Repair the defective connector.

STEP 2. 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 connector (at the front 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) Resistance between C-125 intermediate 

connector terminal Nos.26 and 27

OK: 120

± 20 Ω

Q: Is the check result normal?

YES : 

<Within 120

± 20 Ω> Go to Step 3 .

NO : 

<120

± 20 Ω not within> Go to Step 7 .

AC310613

AD

Connector: C-125 <LHD>

AC310613

AD

Connector: C-125 <LHD>

AC204740

AC204740

AC204740

AC204740

AC204740DC

Male side: C-125

Test
harness

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-436

STEP 3. Connector check: C-09 joint connector 
(CAN2) 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 is not damaged.

Q: Are the check results normal?

YES : 

Go to Step 4 .

NO : 

Repair the connector, or replace the joint 
connector.

STEP 4. 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.

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

AC310613

BB

Connector: C-02 <LHD>

Harness side

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

AC

Short pin

AC310615

AU

Harness side

Connector: C-09 <LHD>

C-09 (GR)

AC204740DD

Harness side: C-09

Test
harness

Test
harness

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-437

terminal Nos. 7 and 18

OK: 120

± 20 Ω

Q: Is the check result normal?

YES : 

<120

± 20 within Ω> Diagnose CAN bus 

lines thoroughly. Refer to 

P.54D-16

.

NO : 

<120

± 20 Ω not within> Go to Step 5 .

STEP 5. 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 

disconnected.

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

terminal No.7 and C-02 combination meter 
connector terminal No.24

OK: 2 

Ω or less

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

terminal No.18 and C-02 combination meter 

AC310613

BB

Connector: C-02 <LHD>

Harness side

AC310615

AU

Harness side

Connector: C-09 <LHD>

C-09 (GR)

AC312553  AI

Harness side: C-09

Test
harness

Harness side: C-02

Test
harness

AC312553  AK

Harness side: C-09

Harness side: C-02

Test
harness

Test
harness