Mitsubishi Lancer (4A9 engine). Manual — part 279

TROUBLESHOOTING

CONTROLLER AREA NETWORK (CAN)

54C-140

YES :

Repair the wiring harness between C-23

KOS-ECU connector and C-04 joint
connector (CAN1).

NO :

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

STEP 45. M.U.T.-III CAN bus diagnostics
(checking the radio and CD player for internal
short)

CAUTION

Strictly observe the specified wiring harness
repair procedure. For details refer to .
Disconnect C-103 radio and CD player connector,
and diagnose the CAN bus line.

ACB01921AC

M.U.T.

JC

JC

SAS

AT/

CVT

EPS

ENGINE

ABS/

ASC

: Red section on screen

AS&G

ETACS

JC

KOS/
WCM

SRS

A/C

AUDIO

METER

MMCS

Levelling

Cor ner

OK: The display of the M.U.T.-III is as shown
in the figure.

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

illustration?
YES :

Repair the wiring harness between C-103

radio and CD player connector and C-04
joint connector (CAN1).

NO :

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 46. M.U.T.-III CAN bus diagnostics
(checking the CAN box unit for internal short)

CAUTION

Strictly observe the specified wiring harness
repair procedure. For details refer to .
Disconnect C-54 CAN box unit connector, and diag-
nose the CAN bus line.

ACB01921AC

M.U.T.

JC

JC

SAS

AT/

CVT

EPS

ENGINE

ABS/

ASC

: Red section on screen

AS&G

ETACS

JC

KOS/
WCM

SRS

A/C

AUDIO

METER

MMCS

Levelling

Cor ner

OK: The display of the M.U.T.-III is as shown
in the figure.

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

illustration?
YES :

Repair the wiring harness between C-54

CAN box unit connector and C-04 joint
connector (CAN1).

NO :

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.

STEP 47. Trouble symptom check
Diagnose the CAN bus line, and check that normal
condition is displayed.

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

CAN COMMUNICATION-RELATED DIAGNOSIS CODE (U-CODE) TABLE

CONTROLLER AREA NETWORK (CAN)

54C-141

CAN COMMUNICATION-RELATED DIAGNOSIS CODE (U-

CODE) TABLE

M1548300302393

Code
No.

Diagnostic item

Output ECU

Action

U0001

Bus Off (CAN-C)

Engine-ECU, AS&G-ECU, A/T-ECU,
CVT-ECU, ABS-ECU, ASC-ECU,
Electric power steering-ECU, Headlamp
automatic levelling-ECU, ETACS-ECU,
corner sensor/back sensor-ECU

CAN main bus line
diagnostics

U0019

Bus Off (CAN-B)

KOS-ECU, WCM, SRS-ECU,
Combination meter, Radio and CD
player, CAN box unit, ETACS-ECU, A/C-
ECU

U0100

Engine time-out

AS&G-ECU, A/T-ECU, CVT-ECU, ABS-
ECU, ASC-ECU, Electric power steering-
ECU, Headlamp automatic levelling-
ECU, Combination meter, ETACS-ECU,
corner sensor/back sensor-ECU

U0101

CVT/AT time-out

Engine-ECU <Except 1800-Diesel>,
ASC-ECU, ETACS-ECU

U0121

ABS/ASC time-out

Engine-ECU, AS&G-ECU, A/T-ECU,
CVT-ECU, Electric power steering-ECU,
Headlamp automatic levelling-ECU,
ETACS-ECU, corner sensor/back
sensor-ECU

U0125

G and yaw rate sensor message
time-out error/message error

ASC-ECU

U0126

Steering wheel sensor time-out

ASC-ECU, ETACS-ECU

U0131

EPS CAN timeout

Engine-ECU <1600, 1800, 2000>,
ETACS-ECU

U0141

ETACS-ECU time-out

Engine-ECU, AS&G-ECU, A/T-ECU,
CVT-ECU, ABS-ECU, ASC-ECU,
Electric power steering-ECU, KOS-ECU,
WCM, SRS-ECU, Headlamp automatic
levelling-ECU, Combination meter,
Radio and CD player, CAN box unit, A/C-
ECU, corner sensor/back sensor-ECU

U0151

SRS time-out

KOS-ECU, WCM, Combination meter,
Radio and CD player, CAN box unit,
ETACS-ECU, A/C-ECU

CAN COMMUNICATION-RELATED DIAGNOSIS CODE (U-CODE) TABLE

CONTROLLER AREA NETWORK (CAN)

54C-142

U0155

Meter time-out

KOS-ECU, WCM, SRS-ECU, Radio and
CD player, CAN box unit, ETACS-
ECU,A/C-ECU

CAN main bus line
diagnostics

U0164

A/C time-out

kOS-ECU, WCM, SRS-ECU,
Combination meter, Radio and CD
player, CAN box unit, ETACS-ECU

U0167

CAN immobilizer
(communication)

Engine-ECU <Except 1800-Diesel>

U0168

WCM/KOS time-out

SRS-ECU, Combination meter, Radio
and CD player, CAN box unit, ETACS-
ECU, A/C-ECU

U0181

Headlamp automatic levelling-
ECU CAN timeout

ETACS-ECU

U0184

Audio unit time-out

KOS-ECU, WCM, SRS-ECU,
Combination meter, ETACS-ECU, A/C-
ECU

U0245

Audio visual navigation unit
time-out

KOS-ECU, WCM, Combination meter,
ETACS-ECU

U0401

Engine malfunction detected

ASC-ECU, Electric power steering-ECU Diagnose CAN main

bus lines and confirm
input signals.

U0415

Vehicle speed (CAN message)
data input malfunction

Engine-ECU <1600, 1800-Petrol, 2000>

U0428

Communication error in steering
wheel sensor

ASC-ECU

U1003

G and yaw rate sensor bus-off

ASC-ECU

U1004

AS&G-ECU time-out

Engine-ECU <1600, 1800-Diesel>,
ETACS-ECU

U1005

Corner sensor/back sensor-
ECU CAN timeout

ETACS-ECU

U1108

Additional CAN B ECU detected ETACS-ECU

U1120

Bus line (CAN-C) low input

U1121

Bus line (CAN-C) high input

U1180

Combination meter time-out

AS&G-ECU

CAN main bus line
diagnostics

U1201

Vehicle speed signal error

U1414

Defective coding data

SRS-ECU

U1415

Coding not completed/Data fail

CVT-ECU, ABS-ECU, ASC-ECU, KOS-
ECU, WCM, SRS-ECU, Electric power
steering-ECU, Headlamp automatic
levelling-ECU, Combination meter,
Radio and CD player, CAN box unit, A/C-
ECU

U1417

Implausible coding data

CVT-ECU, ABS-ECU, ASC-ECU,
Electric power steering-ECU, KOS-ECU,
WCM, Headlamp automatic levelling-
ECU, CAN box unit

Code
No.

Diagnostic item

Output ECU

Action

55-1

GROUP 55

HEATER, AIR

CONDITIONER AND

VENTILATION

CONTENTS

HEATER, AIR CONDITIONER AND VENTILATION . . . . . . . . .

55A

AUTOMATIC AIR CONDITIONER . . . . . . . . . . . . . . . . . . . . . . .

55B