Mitsubishi Colt Ralliart. Manual — part 304

TROUBLESHOOTING

CONTROLLER AREA NETWORK (CAN)

54D-45

STEP 9. M.U.T.-III CAN bus diagnostics (C-43 G
and yaw rate sensor connector disconnected)

AC601064

AB

C-43 (B)

Connector: C-43

Harness side

(1) Disconnect the G and yaw rate 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 (CAN2) and G and
yaw rate sensor connector.

NO :

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

− Troubleshooting

P.35C-105

.

STEP 10. M.U.T.-III CAN bus diagnostics (B-15
combination meter connector disconnected)

AC401055

AE

Connector: B-15

B-15 (B)

Harness side

(1) Disconnect the combination meter 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> Go to Step 12.

NO :

<M.U.T.-III indications do not correspond to
the illustration> Go to Step 11.

Main

Index

Group

TOC

TROUBLESHOOTING

CONTROLLER AREA NETWORK (CAN)

54D-46

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

Q: Is the check result normal?

YES :

<M.U.T.-III screen shows normal state> The

trouble can be an intermittent malfunction
(Refer to GROUP 00

− How to use

Troubleshooting/inspection Service Points

−

How to Cope with Intermittent Malfunction

P.00-13

).

NO :

<M.U.T.-III screen does not show normal
state> Check the combination meter
connector, and repair if necessary. If the
combination meter connector is in good
condition, refer to GROUP 54A

−

Combination meter

− Troubleshooting

P.54A-44

.

STEP 12. M.U.T.-III CAN bus diagnostics [A-08
engine-ECU <M/T> or engine-CVT-ECU <CVT>
connector disconnected]

AC509191

Connector: A-08

Harness side

AD

A-08 (GR)

(1) Disconnect the engine-ECU <M/T> or

engine-CVT-ECU <CVT> 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>The trouble can be an
intermittent malfunction (Refer to GROUP
00

− How to use Troubleshooting/inspection

Service Points

− How to Cope with

Intermittent Malfunction

P.00-13

).

NO :

<M.U.T.-III indications do not correspond to
the illustration> Go to Step 13.

Main

Index

Group

TOC

TROUBLESHOOTING

CONTROLLER AREA NETWORK (CAN)

54D-47

STEP 13. M.U.T.-III CAN bus diagnostics (retest
the system)
Diagnose CAN bus lines, and check if M.U.T.-III
screen shows normal state.

Q: Is the check result normal?

YES :

<M.U.T.-III screen shows normal state> The

trouble can be an intermittent malfunction
(Refer to GROUP 00

− How to use

Troubleshooting/inspection Service Points

−

How to Cope with Intermittent Malfunction

P.00-13

).

NO :

<M.U.T.-III screen does not show normal
state> Check the engine-ECU <M/T> or
engine-CVT-ECU <CVT>, and repair if
necessary. If the engine-ECU <M/T> or
engine-CVT-ECU <CVT> is in good
condition, refer to GROUP 13A

−

Troubleshooting

P.13A-281

<N/A> or

GROUP 13B

− Troubleshooting

P.13B-282

<T/C>.

Main

Index

Group

TOC

TROUBLESHOOTING

CONTROLLER AREA NETWORK (CAN)

54D-48

Diagnostic Item 3: Diagnose the lines between CAN_L and CAN_H for short circuit.

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 component connected to the CAN bus line may be broken.

ETACS-ECU

STEERING WHEEL
SENSOR

COMBINATION
METER

DIAGNOSIS CONNECTOR

EPS-ECU

ABS-ECU

G AND YAW
RATE
SENSOR

ENGINE-ECU <M/T> OR
ENGINE-CVT-ECU <CVT>

NOTE

: VEHICLES WITHOUT ASC
: VEHICLES WITH ASC

Wire colour code
B : Black LG : Light green G : Green L : Blue W : White Y : Yellow SB : Sky blue
BR : Brown O : Orange GR : Grey R : Red P : Pink V : Violet PU : Purple

Main

Index

Group

TOC