Mitsubishi Evolution X. Manual - part 1151

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-239

STEP 58. Using scan tool MB991958, diagnose the CAN 
bus line. (trouble symptom check)

CAUTION

Strictly observe the specified wiring harness repair proce-
dure. For details refer to 

P.54C-7

.

CAUTION

To prevent damage to scan tool MB991958, always turn the 
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch to the "ON" position.

(3) Diagnose CAN bus lines, and check if the scan tool 

MB991958 screen is as shown in the figure.

OK: The display of the scan tool MB991958 is as 
shown in the figure.

Q: Does scan tool MB991958 screen correspond to the 

illustration?
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 

P.00-15

).

NO :  Check the ETACS-ECU connector C-301, and repair 

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

AC608435

Data link connector

MB991827

MB991824

MB991910

AB

AC709542 AB

: Red section on screen

M.U.T.

J/C (3)

SAS

J/C (2)

KOS/WCM

SRS

A/C

AUDIO

MMCS

Sat Radio

HFM

OCM

METER

ASC

ENGINE

J/C (1)

ETACS

<M/T>

S-AWC

AC709543 AB

: Red section on screen

M.U.T.

J/C (3)

SAS

J/C (2)

KOS/WCM

SRS

A/C

AUDIO

MMCS

Sat Radio

HFM

OCM

METER

ASC

LEVER

ENGINE

J/C (1)

ETACS

<TC-SST>

S-AWC

TC-SST

J/C (4)

CAN COMMUNICATION-RELATED DTC (U-CODE) TABLE

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-240

CAN COMMUNICATION-RELATED DTC (U-CODE) TABLE

M1548300300944

Code 
No.

Diagnostic item

Output ECU

Action

U0001

Bus Off (CAN-C)

ECM, S-AWC-ECU, TC-SST-ECU, Shift 
lever, ASC-ECU, ETACS-ECU

CAN main bus line 
diagnostics

U0019

Bus Off (CAN-B)

KOS-ECU or WCM, SRS-ECU, 
Combination meter, Radio and CD 
player or CD changer, CAN box unit, 
Hands-free module, Satellite radio tuner, 
ETACS-ECU, A/C-ECU

U0020

CAN-B Bus off performance

Occupant classification-ECU

U0021

CAN-B Bus (HI) circuit open

U0022

CAN-B Bus (HI) shorted to 
circuit ground

U0023

CAN-B Bus (HI) shorted to 
circuit power supply

U0024

CAN-B Bus (LO) circuit open

U0025

CAN-B Bus (LO) shorted to 
circuit ground

U0026

CAN-B Bus (LO) shorted to 
circuit power supply

U0100

Engine time-out

S-AWC-ECU, TC-SST-ECU, Shift lever, 
ASC-ECU, Combination meter, 
ETACS-ECU

U0101

TC-SST time-out

ECM, S-AWC-ECU, Shift lever, 
ASC-ECU, ETACS-ECU

U0103

Shift lever time-out

TC-SST-ECU, ETACS-ECU

U0121

ASC-ECU time-out

ECM, S-AWC-ECU, TC-SST-ECU, Shift 
lever, ETACS-ECU

U0125

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

ASC-ECU

U0126

Steering wheel sensor time-out

S-AWC-ECU, ASC-ECU, ETACS-ECU

U0136

S-AWC-ECU time-out

TC-SST-ECU, ASC-ECU, ETACS-ECU

U0141

ETACS-ECU time-out

ECM, S-AWC-ECU, TC-SST-ECU, Shift 
lever, ASC-ECU, KOS-ECU or WCM, 
SRS-ECU, Occupant classification-ECU, 
Combination meter, Radio and CD 
player or CD changer, CAN box unit, 
Hands-free module, Satellite radio tuner, 
A/C-ECU

CAN COMMUNICATION-RELATED DTC (U-CODE) TABLE

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-241

U0151

SRS time-out

KOS-ECU or WCM, Occupant 
classification-ECU, Combination meter, 
Radio and CD player or CD changer, 
CAN box unit, Hands-free module, 
Satellite radio tuner, ETACS-ECU, 
A/C-ECU

CAN main bus line 
diagnostics

U0154

Occupant Classification-ECU 
time-out

KOS-ECU or WCM, SRS-ECU, 
Combination meter, Radio and CD 
player or CD changer, CAN box unit, 
Hands-free module, Satellite radio tuner, 
ETACS-ECU, A/C-ECU

U0155

Meter time-out

KOS-ECU or WCM, SRS-ECU, 
Occupant classification-ECU, Radio and 
CD player or CD changer, CAN box unit, 
Hands-free module, Satellite radio tuner, 
ETACS-ECU, A/C-ECU

U0164

A/C time-out

KOS-ECU or WCM, SRS-ECU, 
Occupant classification-ECU, 
Combination meter, Radio and CD 
player or CD changer, CAN box unit, 
Hands-free module, Satellite radio tuner, 
ETACS-ECU

U0167

CAN immobilizer 
(communication)

ECM

U0168

WCM/KOS time-out

SRS-ECU, Occupant classification-ECU, 
Combination meter, Radio and CD 
player or CD changer, CAN box unit, 
Hands-free nodule, Satellite radio tuner, 
ETACS-ECU, A/C-ECU

U0184

Audio unit time-out

KOS-ECU or WCM, SRS-ECU, 
Occupant classification-ECU, 
Combination meter, Hands-free module, 
Satellite radio tuner, ETACS-ECU, 
A/C-ECU

U0195

Satellite radio tuner time-out

KOS-ECU or WCM, SRS-ECU, 
Occupant classification-ECU, Radio and 
CD player or CD changer, CAN box unit, 
Hands-free module, ETACS-ECU, 
A/C-ECU

U0197

Hands free module time-out

KOS-ECU or WCM, SRS-ECU, 
Occupant classification-ECU, 
Combination meter, Radio and CD 
player or CD changer, CAN box unit, 
Satellite radio tuner, ETACS-ECU, 
A/C-ECU

U0245

Audio visual navigation unit 
time-out

KOS-ECU or WCM, Occupant 
classification-ECU, Combination meter, 
Hands-free module, ETACS-ECU, 
A/C-ECU

Code 
No.

Diagnostic item

Output ECU

Action

CAN COMMUNICATION-RELATED DTC (U-CODE) TABLE

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-242

U0401

Engine malfunction detected

S-AWC-ECU, ASC-ECU

Diagnose CAN main 
bus lines and confirm 
input signals.

U0428

Communication error in steering 
wheel sensor

U0431

ETACS malfunction detected

S-AWC-ECU

U1003

G and yaw rate sensor bus-off

S-AWC-ECU, ASC-ECU

U1108

Excess CAN-B ECU detection

ETACS-ECU

U1120

Bus line (CAN-C) low input

U1121

Bus line (CAN-C) high input

U1180

Combination meter time-out

ECM

CAN main bus line 
diagnostics

U1412

Implausible vehicle speed signal 
received

KOS-ECU or WCM

Diagnose CAN main 
bus lines and confirm 
input signals.

U1414

Defective coding data

SRS-ECU

U1415

Coding not completed/Data fail

S-AWC-ECU, ASC-ECU, KOS-ECU or 
WCM, SRS-ECU, Combination meter, 
Radio and CD player or CD changer, 
CAN box unit, A/C-ECU

U1417

Implausible coding data

S-AWC-ECU, ASC-ECU, KOS-ECU or 
WCM, CAN box unit

Code 
No.

Diagnostic item

Output ECU

Action