Mitsubishi Evolution X. Manual — part 1106

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-59

CAUTION

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

P.54C-7

.

(1) Disconnect joint connector (CAN4), and measure the

resistance at the wiring harness side of joint connector
(CAN4).

(2) Measure the resistance between joint connector (CAN4)

terminal 6 and body ground.

OK: 1 kilo ohm or more

(3) Measure the resistance between joint connector (CAN4)

terminal 19 and body ground.

OK: 1 kilo ohm or more

Q: Do all the resistances measure 1 kilo ohm or more?

YES : Go to Step 9.
NO : Go to Step 16.

STEP 9. Check the wiring harness between joint connector
(CAN3) C-127 and joint connector (CAN2) C-104 for a short
to ground. Measure the resistance at joint connector
(CAN3) C-127.

CAUTION

Disconnect the negative battery terminal. For details refer
to

P.54C-7

.

CAUTION

A digital multimeter should be used. For details refer to

P.54C-7

.

CAUTION

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

P.54C-7

.

(1) Disconnect joint connector (CAN3), and measure the

resistance at the wiring harness side of joint connector
(CAN3).

AC709707

TEST
HARNESS

Harness side: A-14

BD

AC709707BE

TEST
HARNESS

Harness side: A-14

DIAGNOSIS

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CONTROLLER AREA NETWORK (CAN)

54C-60

(2) Measure the resistance between joint connector (CAN3)

terminal 5 and body ground.

OK: 1 kilo ohm or more

(3) Measure the resistance between joint connector (CAN3)

terminal 16 and body ground.

OK: 1 kilo ohm or more

Q: Do all the resistances measure 1 kilo ohm or more?

YES : Check intermediate connector A-13, and repair if

necessary. If the intermediate connector is in good
condition, repair the wiring harness between joint
connector (CAN3) C-127 and joint connector (CAN4)
A-14.

NO : Check intermediate connector C-131, and repair if

necessary. If the intermediate connector is in good
condition, repair the wiring harness between joint
connector (CAN3) C-127 and joint connector (CAN2)
C-104.

STEP 10. Using scan tool MB991958, diagnose the CAN
bus line. (checking the steering wheel sensor for internal
short to ground)

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.

AC709707

TEST
HARNESS

Harness side: C-127

BF

AC709707BG

TEST
HARNESS

Harness side: C-127

DIAGNOSIS

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CONTROLLER AREA NETWORK (CAN)

54C-61

(1) Disconnect steering wheel sensor connector C-209.
(2) Connect scan tool MB991958 to the data link connector.
(3) Turn the ignition switch to the "ON" position.

(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 steering wheel

sensor connector C-209 and joint connector (CAN2)
C-104.

NO : Check steering wheel sensor connector C-209, and

repair if necessary. If the steering wheel sensor
connector is in good condition, replace the steering
wheel sensor.

AC608435

Data link connector

MB991827

MB991824

MB991910

AB

AC709542 AC

: Red section on screen

M.U.T.

J/C (3)

J/C (2)

KOS/WCM

SRS

A/C

AUDIO

MMCS

Sat Radio

HFM

OCM

METER

ASC

ENGINE

J/C (1)

ETACS

<M/T>

SAS

S-AWC

AC709543 AC

: Red section on screen

M.U.T.

J/C (3)

J/C (2)

KOS/WCM

SRS

A/C

AUDIO

MMCS

Sat Radio

HFM

OCM

METER

ASC

LEVER

J/C (1)

ETACS

<TC-SST>

SAS

S-AWC

J/C (4)

TC-SST

ENGINE

DIAGNOSIS

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CONTROLLER AREA NETWORK (CAN)

54C-62

STEP 11. Using scan tool MB991958, diagnose the CAN
bus line. (checking the S-AWC-ECU for internal short to
ground)

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 S-AWC-ECU connector C-46.
(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