Mitsubishi Colt Ralliart. Manual — part 300

TROUBLESHOOTING

CONTROLLER AREA NETWORK (CAN)

54D-29

Q: Is the check result normal?

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

Repair the wiring harness between joint

connector (CAN1) and intermediate
connector (B-40).

NO <The voltage between terminal No.2 or 4 and
body earth is more than 4.0 V> :

Repair the wiring

harness between joint connector (CAN1)
and diagnosis connector.

NO <The voltage between terminal No.3 or 8 and
body earth is more than 4.0 V> :

Repair the wiring

harness between joint connector (CAN1)
and combination meter connector.

NO <The voltage between terminal No.6 or 12 and
body earth is more than 4.0 V> :

Go to Step 5.

NO <The voltage between terminal No.7 or 11 and
body earth is more than 4.0 V> :

Go to Step 4.

STEP 4. M.U.T.-III CAN bus diagnostics (B-133
ETACS-ECU connector disconnected)

CAUTION

A digital multimeter should be used. For details
refer to

P.54D-5

CAUTION

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

P.54D-5

AC313826 AB

Connector: B-133

Harness side

B-133 (GR)

(1) Disconnect the ETACS-ECU connector, and

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

AC206268AJ

<Vehicles without ASC>

METER/AC

ETACS

M.U.T.

J/C(1)

J/C(2)

ABS

EPS

ENG/CVT

: Red section on screen

AC206268AK

<Vehicles with ASC>

METER/AC

ETACS

SAS

M.U.T.

J/C(1)

J/C(2)

ASC

EPS

YR/G

ENG/CVT

: Red section on screen

(2) Check that the M.U.T.-III indications correspond

to the illustration.

Q: Is the check result normal?

YES :

<M.U.T.-III indications correspond to the

illustration> Repair the wiring harness
between joint connector (CAN1) and
ETACS-ECU connector.

NO :

<M.U.T.-III indications do not correspond to
the illustration> Check the ETACS-ECU
connector, and repair if necessary. If the
ETACS-ECU connector is in good condition,
power supply to the ETACS-ECU may be
suspected. Diagnose the SWS system.
Refer to GROUP 54B

− Troubleshooting

P.54B-43

Main

Index

Group

TOC

TROUBLESHOOTING

CONTROLLER AREA NETWORK (CAN)

54D-30

STEP 5. M.U.T.-III CAN bus diagnostics (B-142
steering wheel sensor connector disconnected)

CAUTION

A digital multimeter should be used. For details
refer to

P.54D-5

CAUTION

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

P.54D-5

AC601077AB

Connector: B-142

Harness side

(1) Disconnect the steering wheel sensor connector,

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

AC206268AK

<Vehicles with ASC>

METER/AC

ETACS

SAS

M.U.T.

J/C(1)

J/C(2)

ASC

EPS

YR/G

ENG/CVT

: Red section on screen

(2) Check that the M.U.T.-III indications correspond

to the illustration.

Q: Is the check result normal?

YES :

<M.U.T.-III indications correspond to the

illustration> Repair the wiring harness
between joint connector (CAN1) and
steering wheel sensor connector.

NO :

<M.U.T.-III indications do not correspond to
the illustration> Check the steering wheel
sensor connector, and repair if necessary. If
the steering wheel sensor connector is in
good condition, power supply to the steering
wheel sensor may be suspected. Diagnose
the ASC system. Refer to GORUP 35C

−

Troubleshooting

P.35C-102

STEP 6. Voltage measurement at B-01 joint
connector (CAN2).

CAUTION

A digital multimeter should be used. For details
refer to

P.54D-5

CAUTION

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

P.54D-5

AC313820AF

Connector: B-01

(1) Disconnect joint connector (CAN2), and measure

at the wiring harness side.

(2) Connect the negative battery terminal, and turn

the ignition switch to the ON position.

(3) Measure the voltage between each of B-01 joint

connector (CAN2) terminals and body earth.

Main

Index

Group

TOC

TROUBLESHOOTING

CONTROLLER AREA NETWORK (CAN)

54D-31

<CAN_H>

•

AC204738

AC204738NC

Harness side: B-01

Test
harness

Terminal No.1 and body earth <vehicles with

ASC>

•

AC313907

AC313907AN

Harness side: B-01

Test
harness

Terminal No.2 and body earth

•

AC313907AR

Harness side: B-01

Test
harness

Terminal No.8 and body earth

•

AC313907

AC313907AS

Harness side: B-01

Test
harness

Terminal No.9 and body earth

OK: 4.0 V or less

<CAN_L>

•

AC313907

AC313907AP

Harness side: B-01

Test
harness

Terminal No.4 and body earth

•

AC204738

AC204738ND

Harness side: B-01

Test harness

Terminal No.5 and body earth <vehicles with

ASC>

•

AC313907

AC313907AU

Harness side: B-01

Test
harness

Terminal No.10 and body earth

•

AC313907

AC313907AT

Harness side: B-01

Test
harness

Terminal No.11 and body earth

OK: 4.0 V or less

(4) Disconnect the negative battery terminal.

Main

Index

Group

TOC

TROUBLESHOOTING

CONTROLLER AREA NETWORK (CAN)

54D-32

Q: Is the check result normal?

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

Repair the wiring harness between joint

connector (CAN2) and intermediate
connector (B-40).

NO <The voltage between terminal No.1 or 5 and
body earth is more than 4.0 V> :

Go to Step 9.

NO <The voltage between terminal No.2 or 4 and
body earth is more than 4.0 V> :

Go to Step 7.

NO <The voltage between terminal No.8 or 11 and
body earth is more than 4.0 V> :

Go to Step 8.

NO <The voltage between terminal No.9 or 10 and
body earth is more than 4.0 V> :

Repair the wiring

harness between joint connector (CAN2)
and engine-ECU <M/T> or
engine-CVT-ECU <CVT>.

STEP 7. M.U.T.-III CAN bus diagnostics (A-05
ABS-ECU <vehicles without ASC> or ASC-ECU
<vehicles with ASC> connector disconnected)

AC601294

A-05 (B)

Harness side

<ABS-ECU>

<ASC-ECU>

Connector: A-05

(1) Disconnect the ABS-ECU <vehicles without

ASC> or ASC-ECU <vehicles with ASC>
connector, and diagnose by using the M.U.T.-III.

AC206268AJ

<Vehicles without ASC>

METER/AC

ETACS

M.U.T.

J/C(1)

J/C(2)

ABS

EPS

ENG/CVT

: Red section on screen

AC206268AK

<Vehicles with ASC>

METER/AC

ETACS

SAS

M.U.T.

J/C(1)

J/C(2)

ASC

EPS

YR/G

ENG/CVT

: Red section on screen

(2) Check that the M.U.T.-III indications correspond

to the illustration.

Q: Is the check result normal?

YES :

<M.U.T.-III indications correspond to the

illustration> Repair the wiring harness
between joint connector (CAN2) and
ABS-ECU <vehicles without ASC> or
ASC-ECU < connector.

NO :

<M.U.T.-III indications do not correspond to
the illustration> Check the ABS-ECU
<vehicles without ASC> or ASC-ECU <
connector, and repair if necessary. If the
ABS-ECU <vehicles without ASC> or
ASC-ECU < connector is in good condition,
power supply to the ABS-ECU <vehicles
without ASC> or ASC-ECU < may be
suspected. Diagnose the ABS or ASC
system. Refer to GROUP 35B

−

Troubleshooting

P.35B-60

<vehicles without

ASC> or GROUP 35C

− Troubleshooting

P.35C-86

<vehicles with ASC>.

Main

Index

Group

TOC