Mitsubishi Grandis. Manual - part 544

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-274

disconnected.

(3) Resistance between C-125 intermediate 

connector terminal No.27 and body earth

OK: 1 k

Ω or more

Q: Is the check result normal?

YES : 

<1 k

Ω or more> Go to Step 5.

NO : 

<less than 1 k

Ω> Go to Step 22.

STEP 5. 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 6.

NO : 

Repair a defective connector or replace the 
joint connector.

STEP 6. 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.

CAUTION

When measuring the resistance, disconnect the 
negative battery terminal. For details refer to 

P.54D-8

.

(2) Ensure that the negative battery terminal is 

disconnected.

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

AC209364LE

Male side: C-125

Test harness

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

AB

Short pin

AC310628AY

Connector: C-09 <RHD>

C-09 (GR)

Harness side

AC209364LI

Harness side: C-09

Test
harness

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-275

terminal No.17 and body earth

OK: 1 k

Ω or more

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

terminal No.19 and body earth

OK: 1 k

Ω or more

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

terminal No.16 and body earth

OK: 1 k

Ω or more

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

terminal No.20 and body earth

OK: 1 k

Ω or more

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

terminal No.15 and body earth

OK: 1 k

Ω or more

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

terminal No.14 and body earth

OK: 1 k

Ω or more

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

terminal No.18 and body earth

OK: 1 k

Ω or more

Q: Are the check result normal?

AC209364LF

Harness side: C-09

Test harness

AC209364MF

Harness side: C-09

Test
harness

AC209364MG

Harness side: C-09

Test harness

AC209364LM

Harness side: C-09

Test
harness

AC209364ML

Harness side: C-09

Test
harness

AC209364LG

Harness side: C-09

Test
harness

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-276

YES <all of the measurement results show 1 k

Ω or 

more> : 

Go to Step 21.

NO <The resistance between terminal No.17 and 
body earth is less than 1 k

Ω> : 

Go to Step 7.

NO <The resistance between terminal No.19 and 
body earth is less than 1 k

Ω> : 

Go to Step 8.

NO <The resistance between terminal No.16 and 
body earth is less than 1 k

Ω> : 

Go to Step 10.

NO <The resistance between terminal No.20 and 
body earth is less than 1 k

Ω> : 

Go to Step 12.

NO <The resistance between terminal No.15 and 
body earth is less than 1 k

Ω> : 

Go to Step 16.

NO <The resistance between terminal No.14 and 
body earth is less than 1 k

Ω> : 

Go to Step 18.

NO <The resistance between terminal No.18 and 
body earth is less than 1 k

Ω> : 

Go to Step 20.

STEP 7. 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 joint connector (CAN2) and the 

combination meter connector, and measure at 

the wiring harness side.

CAUTION

When measuring the resistance, disconnect the 
negative battery terminal. For details refer to 

P.54D-8

.

(2) Ensure that the negative battery terminal is 

disconnected.

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

terminal No.17 and body earth

OK: 1 k

Ω or more

CAUTION

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

P.54D-8

.

Q: Is the check result normal?

YES : 

<1 k

Ω or more> Follow diagnostic item 20, 

Diagnose CAN bus lines thoroughly. Refer 
to 

P.54D-526

.

NO : 

<less than 1 k

Ω> Repair the wiring harness 

between the 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.

AC310628AY

Connector: C-09 <RHD>

C-09 (GR)

Harness side

AC310628AY

Connector: C-09 <RHD>

C-09 (GR)

Harness side

AC209364LI

Harness side: C-09

Test
harness

AC310631AB

Connectors: C-106 <RHD>

Harness side

DIAGNOSIS

CONTROLLER AREA NETWORK (CAN)

54D-277

STEP 9. 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 joint connector (CAN2) and the 

A/C-ECU connector, and measure at the wiring 
harness side.

CAUTION

When measuring the resistance, disconnect the 
negative battery terminal. For details refer to 

P.54D-8

.

(2) Ensure that the negative battery terminal is 

disconnected.

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

terminal No.19 and body earth

OK: 1 k

Ω or more

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 20 

"Diagnose CAN bus lines thoroughly." Refer 
to 

P.54D-526

.

NO : 

<1.0 V or more> Repair the wiring harness 
between the joint connector (CAN2) and the 
A/C-ECU connector.

STEP 10. Connector check: C-221 ETACS-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 11.

NO : 

Repair the defective connector.

AC310628AY

Connector: C-09 <RHD>

C-09 (GR)

Harness side

AC310631AB

Connectors: C-106 <RHD>

Harness side

AC209364LF

Harness side: C-09

Test harness

AC310620

Connector: C-221

Junction block 
(Rear view)

<RHD>

AC

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Harness side

C-221(GR)