Mitsubishi Grandis. Manual - part 491

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-62

STEP 26. Voltage measurement at the 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 

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

(2) Connect the negative battery terminal, and turn 

the ignition switch to the ON position.

(3) Voltage between A-07 joint connector (CAN1) 

terminal No.2 and body earth

OK: Less than 1.0 V

(4) Disconnect the negative battery terminal.

CAUTION

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

P.54D-8

.

Q: Is the check result normal?

YES : 

<less than 1.0 V> Follow diagnostic item 17 

"Diagnose CAN bus lines thoroughly." Refer 
to 

P.54D-452

.

NO : 

<1.0 V or more> Repair the wiring harness 
between the joint connector (CAN1) and the 
ABS-ECU connector.

STEP 27. Voltage measurement at the 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) Connect the negative battery terminal, and turn 

AC302572AD

Connector: A-07

Harness side

AC310401

Connector: A-03 <LHD>

Harness side

AK

AC209365JZ

Harness side: A-07

Test
harness

AC302572AD

Connector: A-07

Harness side

AC310613

AD

Connector: C-125 <LHD>

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-63

the ignition switch to the ON position.

(3) Voltage between A-07 joint connector (CAN1) 

terminal No.1 and body earth

OK: Less than 1.0 V

(4) Disconnect the negative battery terminal.

CAUTION

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

P.54D-8

.

Q: Is the check result normal?

YES : 

<less than 1.0 V> Follow diagnostic item 17 

"Diagnose CAN bus lines thoroughly." Refer 
to 

P.54D-452

.

NO : 

<1.0 V or more> Repair the wiring harness 
between the joint connector (CAN1) and the 
intermediate connector.

STEP 28. 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 29 .

NO : 

Repair the defective connector.

STEP 29. Voltage 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 intermediate connector (at the front 
wiring harness side).

(2) Connect the negative battery terminal, and turn 

the ignition switch to the ON position.

(3) Voltage between C-125 intermediate connector 

terminal No.26 and body earth

OK: 4.0 V or less

Q: Is the check result normal?

YES : 

<4.0 V or less> Go to Step 30.

NO : 

<more than 4.0 V> Go to Step 45.

AC209365KB

Harness side: A-07

Test
harness

AC310613

AD

Connector: C-125 <LHD>

AC310613

AD

Connector: C-125 <LHD>

AC209365KC

Male side: C-125

Test harness

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-64

STEP 30. 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 and its short pins are not 
damaged.

Q: Is the check result normal?

YES : 

Go to Step 31 .

NO : 

Repair a defective connector or replace the 
joint connector.

STEP 31. Voltage 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) Connect the negative battery terminal, and turn 

the ignition switch to the ON position.

(3) Voltage between C-09 joint connector (CAN2) 

terminal No.7 and body earth

OK: 4.0 V or less

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

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

AB

Short pin

AC310615

AU

Harness side

Connector: C-09 <LHD>

C-09 (GR)

AC209365KF

Harness side: C-09

Test harness

AC209365KH

Harness side: C-09

Test
harness

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-65

terminal No.2 and body earth

OK: 4.0 V or less

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

terminal No.3 and body earth

OK: 4.0 V or less

(6) Voltage between C-09 joint connector (CAN2) 

terminal No.5 and body earth

OK: 4.0 V or less

(7) Voltage between C-09 joint connector (CAN2) 

terminal No.1 and body earth

OK: 4.0 V or less

(8) Voltage between C-09 joint connector (CAN2) 

terminal No.6 and body earth

OK: 4.0 V or less

(9) Disconnect the negative battery terminal.

Q: Are the check result normal?

YES <all of the measurement results show 4.0 V or 
less> : 

Go to Step 44 .

NO <The voltage between terminal No.7 and body 
earth is more than 4.0 V> : 

Go to Step 32 .

NO <The voltage between terminal No.2 and body 
earth is more than 4.0 V> : 

Go to Step 33 .

NO <The voltage between terminal No.3 and body 
earth is more than 4.0 V> : 

Go to Step 35 .

NO <The voltage between terminal No.5 and body 
earth is more than 4.0 V> : 

Go to Step 37 .

NO <The voltage between terminal No.1 and body 
earth is more than 4.0 V> : 

Go to Step 41 .

NO <The voltage between terminal No.6 and body 
earth is more than 4.0 V> : 

Go to Step 43 .

STEP 32. Voltage 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 joint connector (CAN2) and the 

AC209365KI

Harness side: C-09

Test
harness

AC209365KJ

Harness side: C-09

Test harness

AC209365KK

Harness side: C-09

Test
harness

AC209365KL

Harness side: C-09

Test harness

AC310615

AU

Harness side

Connector: C-09 <LHD>

C-09 (GR)