Mitsubishi Grandis. Manual - part 595

 

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Mitsubishi Grandis. Manual - part 595

 

 

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-478

STEP 2. Resistance measurement at the C-126 
diagnosis 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) Measure at the diagnosis connector 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-126 diagnosis connector 

terminal Nos. 6 and 14

Q: How much resistance is measured?

 or less : 

Diagnose the lines between the 

CAN_L and H for short circuit. Refer to 

P.54D-328

.

No continuity : 

Diagnose the terminator resistors 

at both ends. Refer to 

P.54D-404

.

More than 2 

 (i.e. continuity exists) : 

Go to Step 3 

.

STEP 3. Connector check: 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

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: Is the check result normal?

YES : 

Go to Step 4 .

NO : 

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

STEP 4. MUT-III CAN bus diagnostics [A-07 joint 
connector (CAN1)]

(1) Disconnect the joint connector (CAN1), and 

AC310613

AO

Connector: C-126 <LHD>

Harness side 
(Front side)

C-126 (B)

AC311938 CC

Front side : C-126

Test
harness

Test
harness

AC302572AD

Connector: A-07

Harness side

AC302572AD

Connector: A-07

Harness side

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-479

check by using the MUT-III.

(2) Check that the MUT-III indications correspond to 

the illustration.

Q: Is the check result normal?

YES : 

<MUT-III indications correspond to the 

illustration> Go to Step 25  .

NO : 

<MUT-III indications do not correspond to 
the illustration> Go to Step 5 .

STEP 5. 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: Is the check result normal?

YES : 

Go to Step 6 .

NO : 

Repair a defective connector or replace the 
joint connector.

AC309834

MUT

J/C (2)

METER

ETAC S

J/C (1)

ASC -ECU

ENG/AT-ECU

A/C -ECU

SRS-ECU

STR. A .

SNSR

C. DISPL AY

AE

 : Red section 

   on screen

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

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-480

STEP 6. MUT-III CAN bus diagnostics (C-02 
combination meter connector disconnected)

(1) Disconnect the combination meter connector, 

and diagnose by using the MUT-III.

(2) Check that the MUT-III indications correspond to 

the illustration.

Q: Is the check result normal?

YES : 

<MUT-III indications correspond to the 

illustration> Go to Step 7  .

NO : 

<MUT-III indications do not correspond to 
the illustration> Go to Step 8 .

STEP 7. 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 

AC310613

BB

Connector: C-02 <LHD>

Harness side

AC309834

MUT

J/C (2)

METER

ETAC S

J/C (1)

ASC -ECU

ENG/AT-ECU

A/C -ECU

SRS-ECU

STR. A .

SNSR

C. DISPL AY

AD

 : Red section 

   on screen

AC310613

BB

Connector: C-02 <LHD>

Harness side

AC310615

AU

Harness side

Connector: C-09 <LHD>

C-09 (GR)

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-481

disconnected.

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

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

OK: 2 

 or less

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

terminal No.18 and C-02 combination meter 

connector terminal No.23

OK: 2 

 or less

CAUTION

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

P.54D-8

.

Q: Are the check results normal?

YES : 

<All the resistances measure 2 

Ω or less> 

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

P.54A-55

.

NO : 

<Either or all of the resistances measure 
more than 2 

Ω> Repair the wiring harness 

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

STEP 8. Connector check: C-106 A/C-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 9 .

NO : 

Repair the defective connector.

STEP 9. MUT-III CAN bus diagnostics (C-106 
A/C-ECU connector disconnected)

(1) Disconnect the A/C-ECU connector, and 

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

AC310613

AB

Connector: C-106 <LHD>

Harness side

AC310613

AB

Connector: C-106 <LHD>

Harness side

 

 

 

 

 

 

 

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