Mitsubishi Grandis. Manual - part 612

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-546

YES : 

<MUT-III indications correspond to the 

illustration> Go to Step 32  .

NO : 

<MUT-III indications do not correspond to 
the illustration> Go to Step 33 .

STEP 32. Resistance measurement at A-07 joint 
connector (CAN1) and A-04 ASC-ECU connector.
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.

(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 A-07 joint connector (CAN1) 

terminal No.2 and A-04 ASC-ECU connector 
terminal No.15

OK: 2 

Ω or less

(5) Continuity between A-07 joint connector (CAN1) 

terminal No.5 and A-04 ASC-ECU connector 

AC310398

AJ

Connector: A-04 <RHD>

A-04

Harness side

AC302572AD

Connector: A-07

Harness side

AC312553

Harness side: A-07

Test
harness

Test
harness

Harness side: A-04

BU

AC312553

Harness side: A-07

Test
harness

Harness side: A-04

BV 

Test
harness

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-547

terminal No.11

OK: 2 

Ω 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 ASC-ECU may be 
suspected. Diagnose the ASC system. 
Refer to 

P.35C-129

.

NO : 

<Either or all of the resistances measure 
more than 2 

Ω> Repair the wiring harness 

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

STEP 33. 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 is not damaged.

Q: Is the check result normal?

YES : 

Go to Step 34 .

NO : 

Repair a defective connector or replace the 
joint connector.

STEP 34. 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 35 .

NO : 

Repair the defective connector.

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

AC

Short pin

AC310628AB

Connector: C-125 <RHD>

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-548

STEP 35. Resistance measurement at C-125 
intermediate connector and 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.

(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-125 intermediate 

connector terminal No.26 and A-07 joint 
connector (CAN1) terminal No.4

OK: 2 

Ω or less

(5) Continuity between C-125 intermediate 

connector terminal No.27 and A-07 joint 

AC302572AD

Connector: A-07

Harness side

AC310628AB

Connector: C-125 <RHD>

AC312553 AU

Male side: C-125

Test harness

Harness side: A-07

Test
harness

AC312553

Male side: C-125

Test harness

 AV

Harness side: A-07

Test
harness

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-549

connector (CAN1) terminal No.1

OK: 2 

Ω 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 voltages measure 2 

Ω or less> Go 

to Step 36      .

NO : 

<Either or all of the resistances measure 
more than 2 

Ω> Repair the wiring harness 

between joint connector (CAN1) and the 
intermediate connector.

STEP 36. Resistance measurement at C-125 
intermediate connector and 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 joint connector (CAN2) and the 

intermediate 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-125 intermediate 

connector terminal No.26 and C-09 joint 

AC310628AY

Connector: C-09 <RHD>

C-09 (GR)

Harness side

AC310628AB

Connector: C-125 <RHD>

AC312553

AC312553 AN

Harness side: C-09

Test
harness

Female side: C-125

Test harness