Mitsubishi Outlander (2013+). Manual - part 730

TROUBLESHOOTING

CONTROLLER AREA NETWORK (CAN)

54C-56

Diagnosis Item 8: Diagnose shorts between CAN_H and L lines (CAN-C-Mid).

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 com-
ponent connected to the CAN bus line may be 
broken.

• When the ETACS-ECU of vehicles without 

KOS is replaced, the encrypted code of the 
ignition key needs to be registered to the 
ETACS-ECU. (If the encrypted code is not reg-
istered, the engine cannot be started. Regis-
ter the encrypted code as described in 
GROUP 54A, Immobilizer System 

− How to 

Register Key ID .)

TROUBLE JUDGEMENT

When all of the following conditions are met, the 
M.U.T.-III determines that a short circuit is present 
between CAN_L and CAN_H lines.

• The M.U.T.-III cannot receive the periodic trans-

mission data from any ECUs.

• The voltage between CAN-C-Mid (CAN_L and 

CAN_H lines) is 1.0 V or more, 4.0 V or less.

• The resistance at CAN-C-Mid (CAN_L and 

CAN_H lines) is 2 

Ω or less.

TROUBLESHOOTING HINTS

• Malfunction of the wiring harness

• Malfunction of the connector

• Malfunction of the ETACS-ECU

• Malfunction of the A/C-ECU

• Malfunction of the KOS-ECU <Vehicles with 

KOS>

• Malfunction of the OSS-ECU <Vehicles with 

OSS>

• Malfunction of the CAN box unit <vehicles with 

MMCS>

• Malfunction of the radio and CD player <vehicles 

with radio and CD player>

• Malfunction of the corner sensor/back sen-

sor-ECU <vehicles with reversing sensor sys-
tem>

• Malfunction of the electric tailgate control unit 

<vehicles with electric tailgate>

• Malfunction of the combination meter

DIAGNOSIS PROCEDURE

STEP 1. Connector check: joint connector 
(CAN-LO)

CAUTION

The strand end of the twist wire should be within 
10 cm from the connector. For details refer to 

P.54C-5

.

AC209350

1

12

2

13

3

14

4

15

5

16

6

17

7

18

8

19

9

20

10

21

11

22

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

When checking the joint connector, ensure that its 
wiring harness side and its short pins are not dam-
aged.

Q: Is the check result normal?

YES : 

Go to Step 2

NO : 

Repair a defective connector or replace the 
joint connector.

STEP 2. Resistance measurement at joint 
connector (CAN-LO).

CAUTION

A digital multimeter should be used. For details 
refer to 

P.54C-5

.

CAUTION

The test wiring harness should be used. For 
details refer to 

P.54C-5

.

(1) Disconnect the connector, and measure at the 

wiring harness side.

(2) Turn the ignition switch to the LOCK (OFF) 

position.

CAUTION

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

P.54C-5

.

(3) Ensure that the negative battery terminal is 

disconnected.

(4) Resistance between joint connector (CAN-LO) 

TROUBLESHOOTING

CONTROLLER AREA NETWORK (CAN)

54C-57

terminal Nos.11 and 22

OK: 120 

± 20 Ω

CAUTION

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

P.54C-5

.

Q: Is the check result normal?

YES : 

<Within 120 

± 20 Ω> Go to Step 4.

NO  : 

<Not within 120 

± 20 Ω> Go to Step 3.

STEP 3. Resistance measurement at ETACS-ECU 
connector.

CAUTION

A digital multimeter should be used. For details 
refer to 

P.54C-5

.

(1) Remove the ETACS-ECU, and measure at the 

equipment side.

(2) Resistance between ETACS-ECU connector 

terminal Nos.16 and 17

OK: 120 

± 20 Ω

CAUTION

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

P.54C-5

.

Q: Is the check result normal?

YES : 

<Within 120 

± 20 Ω> Repair the wiring 

harness between joint connector (CAN-LO) 
and the ETACS-ECU connector.

NO : 

<Not within 120 

± 20 Ω> Check the 

ETACS-ECU connector, and repair if 
necessary. If the ETACS-ECU connector is 
in good condition, replace the ETACS-ECU.

STEP 4. Resistance measurement at joint 
connector (CAN-LO).

CAUTION

A digital multimeter should be used. For details 
refer to 

P.54C-5

.

CAUTION

The test wiring harness should be used. For 
details refer to 

P.54C-5

.

(1) Disconnect the connector, and measure at the 

wiring harness side.

(2) Turn the ignition switch to the LOCK (OFF) 

position.

CAUTION

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

P.54C-5

.

(3) Ensure that the negative battery terminal is 

disconnected.

(4) Resistance between joint connector (CAN-LO) 

terminal Nos.6 and 17

OK: 1 k

Ω or more

CAUTION

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

P.54C-5

.

Q: Is the check result normal?

YES : 

<1 k

Ω or more> Go to Step 6.

NO : 

<Less than 1 k

Ω> Go to Step 5.

STEP 5. Resistance measurement at A/C-ECU 
connector.

CAUTION

A digital multimeter should be used. For details 
refer to 

P.54C-5

.

(1) Remove the A/C-ECU, and measure at the 

equipment side.

(2) Resistance between A/C-ECU connector terminal 

Nos.31 and 32

OK: 1 k

Ω or more

CAUTION

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

P.54C-5

.

Q: Is the check result normal?

YES : 

<1 k

Ω or more> Repair the wiring harness 

between joint connector (CAN-LO) and the 
A/C-ECU connector.

NO : 

<Less than 1 k

Ω> Check the A/C-ECU 

connector, and repair if necessary. If the 
A/C-ECU connector is in good condition, 
replace the A/C-ECU.

STEP 6. Resistance measurement at joint 
connector (CAN-LO).

NOTE: Steps 6 and 7 are only for vehicles with elec-
tric tailgate. On vehicles without it, go to Step 8.

CAUTION

A digital multimeter should be used. For details 
refer to 

P.54C-5

.

CAUTION

The test wiring harness should be used. For 
details refer to 

P.54C-5

.

(1) Disconnect the connector, and measure at the 

wiring harness side.

(2) Turn the ignition switch to the LOCK (OFF) 

position.

CAUTION

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

P.54C-5

.

(3) Ensure that the negative battery terminal is 

TROUBLESHOOTING

CONTROLLER AREA NETWORK (CAN)

54C-58

disconnected.

(4) Resistance between joint connector (CAN-LO) 

terminal Nos.8 and 19

OK: 1 k

Ω or more

CAUTION

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

P.54C-5

.

Q: Is the check result normal?

YES : 

<1 k

Ω or more> Go to Step 8.

NO : 

<Less than 1 k

Ω> Go to Step 7.

STEP 7. Resistance measurement at electric 
tailgate control unit connector.

CAUTION

A digital multimeter should be used. For details 
refer to 

P.54C-5

.

(1) Remove the electric tailgate control unit, and 

measure at the equipment side.

(2) Resistance between electric tailgate control unit 

connector terminal Nos.7 and 8

OK: 1 k

Ω or more

CAUTION

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

P.54C-5

.

Q: Is the check result normal?

YES : 

<1 k

Ω or more> Check the intermediate 

connector, and repair if necessary. If the 
intermediate connector is in good condition, 
repair the wiring harness between joint 
connector (CAN-LO) and the electric 
tailgate control unit connector.

NO : 

<Less than 1 k

Ω> Check the electric tailgate 

control unit connector, and repair if 
necessary. If the electric tailgate control unit 
connector is in good condition, replace the 
electric tailgate control unit.

STEP 8. Resistance measurement at joint 
connector (CAN-LO).

NOTE: Steps 8 and 9 are only for vehicles with 
reversing sensor system. On vehicles without it, go 
to Step 10.

CAUTION

A digital multimeter should be used. For details 
refer to 

P.54C-5

.

CAUTION

The test wiring harness should be used. For 
details refer to 

P.54C-5

.

(1) Disconnect the connector, and measure at the 

wiring harness side.

(2) Turn the ignition switch to the LOCK (OFF) 

position.

CAUTION

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

P.54C-5

.

(3) Ensure that the negative battery terminal is 

disconnected.

(4) Resistance between joint connector (CAN-LO) 

terminal Nos.4 and 15

OK: 1 k

Ω or more

CAUTION

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

P.54C-5

.

Q: Is the check result normal?

YES : 

<1 k

Ω or more> Go to Step 10.

NO : 

<Less than 1 k

Ω> Go to Step 9.

STEP 9. Resistance measurement at corner 
sensor/back sensor-ECU connector.

CAUTION

A digital multimeter should be used. For details 
refer to 

P.54C-5

.

(1) Remove the corner sensor/back sensor-ECU, 

and measure at the equipment side.

(2) Resistance between corner sensor/back 

sensor-ECU connector terminal Nos.19 and 20

OK: 1 k

Ω or more

CAUTION

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

P.54C-5

.

Q: Is the check result normal?

YES : 

<1 k

Ω or more> Repair the wiring harness 

between joint connector (CAN-LO) and the 
corner sensor/back sensor-ECU connector.

NO : 

<Less than 1 k

Ω> Check the corner 

sensor/back sensor-ECU connector, and 
repair if necessary. If the corner sensor/back 
sensor-ECU connector is in good condition, 
replace the corner sensor/back 
sensor-ECU.

TROUBLESHOOTING

CONTROLLER AREA NETWORK (CAN)

54C-59

STEP 10. Resistance measurement at joint 
connector (CAN-LO).

NOTE: Steps 10 and 11 are only for vehicles with 
radio and CD player system. On vehicles without it, 
go to Step 12.

CAUTION

A digital multimeter should be used. For details 
refer to 

P.54C-5

.

CAUTION

The test wiring harness should be used. For 
details refer to 

P.54C-5

.

(1) Disconnect joint connector (CAN-LO), and 

measure at the wiring harness side.

(2) Turn the ignition switch to the LOCK (OFF) 

position.

CAUTION

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

P.54C-5

.

(3) Ensure that the negative battery terminal is 

disconnected.

(4) Resistance between joint connector (CAN-LO) 

terminal Nos.7 and 18

OK: 1 k

Ω or more

CAUTION

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

P.54C-5

.

Q: Is the check result normal?

YES : 

<1 k

Ω or more> Go to Step 12.

NO : 

<Less than 1 k

Ω> Go to Step 11.

STEP 11. Resistance measurement at radio and 
CD player connector.

CAUTION

A digital multimeter should be used. For details 
refer to 

P.54C-5

.

(1) Remove the radio and CD player, and measure at 

the equipment side.

(2) Resistance at radio and CD player connector 

terminal Nos.3 and 13

OK: 1 k

Ω or more

Q: Is the check result normal?

YES : 

<1 k

Ω or more> Repair the wiring harness 

between joint connector (CAN-LO) and the 
radio and CD player connector.

NO : 

<Less than 1 k

Ω> Check the radio and CD 

player connector, and repair if necessary. If 
the radio and CD player connector is in 
good condition, replace the radio and CD 
player.

STEP 12. Resistance measurement at joint 
connector (CAN-LO).

NOTE: Steps 12 and 13 are only for vehicles with 
MMCS. On vehicles without it, go to Step 14 .

CAUTION

A digital multimeter should be used. For details 
refer to 

P.54C-5

.

CAUTION

The test wiring harness should be used. For 
details refer to 

P.54C-5

.

(1) Disconnect joint connector (CAN-LO), and 

measure at the wiring harness side.

(2) Turn the ignition switch to the LOCK (OFF) 

position.

CAUTION

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

P.54C-5

.

(3) Ensure that the negative battery terminal is 

disconnected.

(4) Resistance between joint connector (CAN-LO) 

terminal Nos.3 and 14

OK: 1 k

Ω or more

CAUTION

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

P.54C-5

.

Q: Is the check result normal?

YES : 

<1 k

Ω or more> Go to Step 14.

NO : 

<Less than 1 k

Ω> Go to Step 13.

STEP 13. Resistance measurement at CAN box 
unit connector.

CAUTION

A digital multimeter should be used. For details 
refer to 

P.54C-5

.

(1) Remove the CAN box unit, and measure at the 

equipment side.

(2) Resistance at CAN box unit connector terminal 

Nos.13 and 14

OK: 1 k

Ω or more

Q: Is the check result normal?

YES : 

<1 k

Ω or more> Repair the wiring harness 

between joint connector (CAN-LO) and the 
CAN box unit connector.

NO : 

<Less than 1 k

Ω> Check the CAN box unit 

connector, and repair if necessary. If the 
CAN box unit connector is in good 
condition, replace the CAN box unit.