Mitsubishi Grandis. Manual - part 617

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-566

disconnected.

(4) Continuity between A-16 intermediate connector 

terminal No.6 and C-112 engine-ECU <M/T> or 
engine-A/T-ECU <A/T> connector terminal 

No.61.

OK: 2 

Ω or less

(5) Continuity between A-16 intermediate connector 

terminal No.12 and C-112 engine-ECU <M/T> or 
engine-A/T-ECU <A/T> connector terminal 
No.62.

OK: 2 

Ω or less

CAUTION

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

P.54D-8

.

Q: Is the check result normal?

YES : 

<All the resistances measure 2 

Ω or less> 

Power supply to the engine-ECU <M/T> or 
engine-A/T-ECU <A/T> may be suspected. 
Diagnose the engine control system. Refer 
to 

P.13A-321

.

NO : 

<Either or all of the resistances measure 
more than 2 

Ω> Repair the wiring harness 

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

AC312553

Harness side: C-112

Test
harness

AS

Male side: A-16

Test
harness

AC312553

Harness side: C-112

Test
harness

AT

Test
harness

Male side: A-16

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-567

Diagnostic Item 24: Diagnose the lines between CAN main bus line and the ABS-ECU <Vehicles 
without ASC>

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.

ABS-ECU

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-568

TROUBLE JUDGMENT

If the MUT-III can not received signal from the 
ABS-ECU, 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 ABS-ECU may 
be defective.

POSSIBLE CAUSES

• Damaged harness wires and connectors

• Malfunction of the ABS-ECU

ABS-ECU

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-569

DIAGNOSTIC PROCEDURE

STEP 1. Connector check: A-07 joint connector 
(CAN1) connector and A-03 ABS-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

.

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 2 .

NO : 

Repair a defective connector or replace the 
joint connector (front wiring harness 
assembly).

STEP 2. Resistance measurement at A-07 joint 
connector (CAN1) and A-03 ABS-ECU 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 (CAN1) and the 

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

AC302572AD

Connector: A-07

Harness side

AC310401

Connector: A-03 <LHD>

Harness side

AK

AC310398

AI

Connector: A-03 <RHD>

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

AC302572AD

Connector: A-07

Harness side

AC310401

Connector: A-03 <LHD>

Harness side

AK

AC310398

AI

Connector: A-03 <RHD>

Harness side