Mitsubishi Outlander (2013+). Manual — part 726

TROUBLESHOOTING

CONTROLLER AREA NETWORK (CAN)

54C-40

disconnected.

(3) Resistance between ETACS-ECU connector

terminal No.17 (CAN_H) and body earth by
backprobing

OK: 1 k

Ω or more

(4) Resistance between ETACS-ECU connector

terminal No.16 (CAN_L) and body earth by
backprobing

OK: 1 k

Ω or more

Q: Is the check result normal?

YES <Resistance value is 1 k

Ω or more in both

CAN_H and CAN_L> :

Go to Step 3.

NO <Resistance value is less than 1 k

Ω in either

CAN_H or CAN_L> :

Perform diagnosis item 7

"Diagnose shorts in the earth to
CAN-C-Mid". Refer to

P.54C-48

.

STEP 3. Check the CAN-C-Mid for short to each
other. Resistance measurement at ETACS-ECU
connector by backprobing.

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) 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

.

(2) Ensure that the negative battery terminal is

disconnected.

(3) Resistance between ETACS-ECU connector

terminal Nos.16 and 17 by backprobing

OK: 60

± 10 Ω

Q: Is the check result normal?

YES :

The trouble can be an intermittent

malfunction (Refer to GROUP 00

− How to

use Troubleshooting/inspection Service
Points

− How to Cope with Intermittent

Malfunction ).

NO <Resistance value is less than 60

± 10 Ω> :

Perform diagnosis Item 8 "Diagnose shorts
between CAN_H and L lines (CAN-C-Mid)".
Refer to

P.54C-56

.

NO <Resistance value is 1 k

Ω or more> :

Check

the wires between ETACS-ECU connector
and joint connector (CAN-LO) for open
circuit, and check the terminal resistors in
the combination meter and the ETACS-ECU
for open circuit. Then repair or replace if
necessary.

Diagnosis Item 6: Diagnose shorts in the power supply to 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 CONDITIONS

The M.U.T.-III judges the trouble when it is impossi-
ble to receive the periodically sent data and the volt-
age of CAN_H or CAN_L line is more than 4.0 V.

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

TROUBLESHOOTING

CONTROLLER AREA NETWORK (CAN)

54C-41

DIAGNOSIS PROCEDURE

STEP 1. Check the CAN-C-Mid. Voltage
measurement at ETACS-ECU connector.

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

.

NOTE: This inspection allows you to check that there
is a short to power supply in either CAN_H line or
CAN_L line. Thus, in the following steps, check the
CAN-C-Mid that is defective.
(1) Disconnect combination meter connector and

ETACS-ECU connector, and measure the voltage
at the harness side of ETACS-ECU connector.

(2) Connect the negative battery terminal, and turn

the ignition switch to the ON position.

(3) Voltage between ETACS-ECU connector terminal

No.17 (CAN_H) and body earth

OK: 4.0 V or less

(4) Voltage between ETACS-ECU connector terminal

No.16 (CAN_L) and body earth

OK: 4.0 V or less

(5) Disconnect the negative battery terminal.

Q: Is the check result normal?

YES :

<Both of the measurement results show 4.0

V or less> Go to Step 25.

NO :

<Either of CAN_H line or CAN_L line the
measurement results show more than 4.0
V> Go to Step 2.

STEP 2. Check the CAN-C-Mid between joint
connector (CAN-LO) and the ETACS-ECU.
Voltage 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 joint connector (CAN-LO), 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 joint connector (CAN-LO)

terminal No.11 (CAN_H) and body earth

OK: 4.0 V or less

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

terminal No.22 (CAN_L) and body earth

OK: 4.0 V or less

(5) Disconnect the negative battery terminal.

Q: Is the check result normal?

YES :

<4.0 V or less> Go to Step 3.

NO :

<More than 4.0 V> Repair the wiring
harness between joint connector (CAN-LO)
and the ETACS-ECU connector.

STEP 3. Check the CAN-C-Mid between joint
connector (CAN-LO) and the A/C-ECU. Voltage
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 joint connector (CAN-LO), 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 joint connector (CAN-LO)

terminal No.6 (CAN_H) and body earth

OK: 4.0 V or less

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

terminal No.17 (CAN_L) and body earth

OK: 4.0 V or less

(5) Disconnect the negative battery terminal.

Q: Is the check result normal?

YES :

<4.0 V or less> Go to Step 6.

NO :

<More than 4.0 V> Go to Step 4.

STEP 4. M.U.T.-III CAN bus diagnostics [A/C-ECU
connector disconnected]
(1) Disconnect A/C-ECU connector, and diagnose by

TROUBLESHOOTING

CONTROLLER AREA NETWORK (CAN)

54C-42

using the M.U.T.-III.

ACC00053

M.U.T.

: Red section on screen

JC

ETACS

KOS

AUDIO

SRS

OSS

ABS/ASC

CVT

ENGINE

EPS

SAS

AWC

MMCS

A/C

ETG

METER

Corner

JC

JC

AB

(2) Diagnose CAN-C-Mid, and check if M.U.T.-III

screen is as shown in the illustration.

Q: Does M.U.T.-III screen correspond to the

illustration?
YES :

Repair the wiring harness between joint

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

NO :

Check the A/C-ECU connector, and repair if
necessary. If the A/C-ECU connector is in
good condition, go to Step 5.

STEP 5. M.U.T.-III CAN bus diagnostics (retest the
system)
Diagnose CAN-C-Mid, and check if M.U.T.-III screen
shows normal state.

Q: Is the check result normal?

YES :

The trouble can be an intermittent

malfunction (Refer to GROUP 00

− How to

use Troubleshooting/inspection Service
Points

− How to Cope with Intermittent

Malfunction ).

NO :

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. Check the CAN-C-Mid between joint
connector (CAN-LO) and the electric tailgate
control unit <vehicles with electric tailgate>.
Voltage measurement at joint connector
(CAN-LO).

NOTE: Steps 6 to 8 are only for vehicles with electric
tailgate. On vehicles without it, go to Step 9.

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) Connect the negative battery terminal, and turn

the ignition switch to the ON position.

(3) Voltage between joint connector (CAN-LO)

terminal No.8 (CAN_H) and body earth

OK: 4.0 V or less

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

terminal No.19 (CAN_L) and body earth

OK: 4.0 V or less

(5) Disconnect the negative battery terminal.

Q: Is the check result normal?

YES :

<4.0 V or less> Go to Step 9.

NO :

<More than 4.0 V> Go to Step 7.

STEP 7. M.U.T.-III CAN bus diagnostics [electric
tailgate control unit connector disconnected]
(1) Disconnect electric tailgate control unit connector,

and diagnose by using the M.U.T.-III.

ACC00053

M.U.T.

: Red section on screen

JC

ETACS

KOS

AUDIO

SRS

OSS

ABS/ASC

CVT

ENGINE

EPS

SAS

AWC

MMCS

A/C

ETG

METER

Corner

JC

JC

AB

(2) Diagnose CAN-C-Mid, and check if M.U.T.-III

screen is as shown in the illustration.

Q: Does M.U.T.-III screen correspond to the

illustration?
YES :

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 :

Check the electric tailgate control unit
connector, and repair if necessary. If the
electric tailgate control unit connector is in
good condition, go to Step 8.

STEP 8. M.U.T.-III CAN bus diagnostics (retest the
system)
Diagnose CAN-C-Mid, and check if M.U.T.-III screen
shows normal state.

Q: Is the check result normal?

TROUBLESHOOTING

CONTROLLER AREA NETWORK (CAN)

54C-43

YES :

The trouble can be an intermittent

malfunction (Refer to GROUP 00

− How to

use Troubleshooting/inspection Service
Points

− How to Cope with Intermittent

Malfunction ).

NO :

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 9. Check the CAN-C-Mid between joint
connector (CAN-LO) and the corner sensor/back
sensor-ECU <vehicles with reversing sensor
system>. Voltage measurement at joint
connector (CAN-LO).

NOTE: Steps 9 to 11 are only for vehicles with
reversing sensor 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) Connect the negative battery terminal, and turn

the ignition switch to the ON position.

(3) Voltage between joint connector (CAN-LO)

terminal No.4 (CAN_H) and body earth

OK: 4.0 V or less

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

terminal No.15 (CAN_L) and body earth

OK: 4.0 V or less

(5) Disconnect the negative battery terminal.

Q: Is the check result normal?

YES :

<4.0 V or less> Go to Step 12.

NO :

<More than 4.0 V> Go to Step 10.

STEP 10. M.U.T.-III CAN bus diagnostics [corner
sensor/back sensor-ECU connector
disconnected]
(1) Disconnect corner sensor/back sensor-ECU

connector, and diagnose by using the M.U.T.-III.

ACC00053

M.U.T.

: Red section on screen

JC

ETACS

KOS

AUDIO

SRS

OSS

ABS/ASC

CVT

ENGINE

EPS

SAS

AWC

MMCS

A/C

ETG

METER

Corner

JC

JC

AB

(2) Diagnose CAN-C-Mid, and check if M.U.T.-III

screen is as shown in the illustration.

Q: Does M.U.T.-III screen correspond to the

illustration?
YES :

Repair the wiring harness between joint

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

NO :

Check the corner sensor/back sensor-ECU
connector, and repair if necessary. If the
corner sensor/back sensor-ECU connector
is in good condition, go to Step 11 .

STEP 11. M.U.T.-III CAN bus diagnostics (retest
the system)
Diagnose CAN-C-Mid, and check if M.U.T.-III screen
shows normal state.

Q: Is the check result normal?

YES :

The trouble can be an intermittent

malfunction (Refer to GROUP 00

− How to

use Troubleshooting/inspection Service
Points

− How to Cope with Intermittent

Malfunction ).

NO :

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.