Mitsubishi Lancer Evolution X. Manual — part 59

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-261

STEP 54. Using scan tool MB991958, diagnose the CAN
bus line. (checking the A/C-ECU <vehicles with A/C> or
heater control unit <vehicles without A/C> for internal
failure)

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) Disconnect A/C-ECU connector C-22 <vehicles with A/C>

or heater control unit connector C-53 <vehicles without
A/C>.

(2) Connect scan tool MB991958 to the data link connector.
(3) Turn the ignition switch to the "ON" position.

AC608435

Data link connector

MB991827

MB991824

MB991910

AB

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-262

(4) 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 : Repair the wiring harness between joint connector

(CAN1) C-105 and A/C-ECU connector C-22
<vehicles with A/C> or heater control unit connector
C-53 <vehicles without A/C>.

NO : Check A/C-ECU connector C-22 <vehicles with A/C>

or heater control unit connector C-53 <vehicles
without A/C>, and repair if necessary. If the A/C-ECU
connector <vehicles with A/C> or heater control unit
connector <vehicles without A/C> is in good
condition, replace the A/C-ECU <vehicles with A/C>
or heater control unit <vehicles without A/C>.

AC709542 AD

: Red section on screen

M.U.T.

J/C (3)

J/C (2)

ASC

ENGINE

ETACS

<M/T>

SAS

S-AWC

J/C (1)

KOS/WCM

SRS

A/C

AUDIO

MMCS

Sat Radio

HFM

OCM

METER

AC709543 AD

: Red section on screen

M.U.T.

J/C (3)

J/C (2)

ASC

LEVER

ETACS

<TC-SST>

SAS

S-AWC

J/C (4)

TC-SST

ENGINE

J/C (1)

KOS/WCM

SRS

A/C

AUDIO

MMCS

Sat Radio

HFM

OCM

METER

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-263

STEP 55. Using scan tool MB991958, diagnose the CAN
bus line. (checking the radio and CD player or CD changer
for internal failure)

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) Disconnect radio and CD player or CD changer connector

C-107.

(2) Connect scan tool MB991958 to the data link connector.
(3) Turn the ignition switch to the "ON" position.

AC608435

Data link connector

MB991827

MB991824

MB991910

AB

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-264

(4) 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 : Repair the wiring harness between joint connector

(CAN1) C-105 and radio and CD player or CD
changer connector C-107.

NO : Check radio and CD player or CD changer connector

C-107, and repair if necessary. If the radio and CD
player or CD changer connector is in good condition,
replace the radio and CD player or CD changer.

AC709542 AD

: Red section on screen

M.U.T.

J/C (3)

J/C (2)

ASC

ENGINE

ETACS

<M/T>

SAS

S-AWC

J/C (1)

KOS/WCM

SRS

A/C

AUDIO

MMCS

Sat Radio

HFM

OCM

METER

AC709543 AD

: Red section on screen

M.U.T.

J/C (3)

J/C (2)

ASC

LEVER

ETACS

<TC-SST>

SAS

S-AWC

J/C (4)

TC-SST

ENGINE

J/C (1)

KOS/WCM

SRS

A/C

AUDIO

MMCS

Sat Radio

HFM

OCM

METER