Mitsubishi Lancer Evolution X. Manual — part 31

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-149

STEP 2. Check the wiring harness between joint connector
(CAN1) C-105 and radio and CD player or CD changer
connector C-107 for open circuit.

CAUTION

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

P.54C-7

.

(1) Disconnect joint connector (CAN1) C-105 and radio and CD

player or CD changer connector C-107, and check the
wiring harness.

(2) Check the wiring harness between joint connector (CAN1)

C-105 (terminal 5) and radio and CD player or CD changer
connector C-107 (terminal 23)

OK: Continuity exists (2 Ω or less)

(3) Check the wiring harness between joint connector (CAN1)

C-105 (terminal 16) and radio and CD player or CD changer
connector C-107 (terminal 33)

OK: Continuity exists (2 Ω or less)

Q: Is the wiring harness between joint connector (CAN1)

C-105 and radio and CD player or CD changer connector
C-107 in good condition?
YES : Check the power supply circuit of the radio and CD

player or CD changer. Refer to GROUP 54A, radio
and CD player − Diagnosis <radio and CD player>

P.54A-356

.

NO : Repair the wiring harness between joint connector

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

AC709707

AC709707 CF

Harness side: C-105

TEST
HARNESS

Harness side: C-107

TEST HARNESS

AC709707 CG

Harness side: C-105

Harness side: C-107

TEST
HARNESS

TEST HARNESS

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-150

DIAGNOSTIC ITEM 21: Diagnose when the scan tool cannot receive the data sent by CAN box unit.

CAUTION

When servicing a CAN bus line, ground yourself by touching a metal object such as an unpainted
water pipe. If you fail to do so, a component connected to the CAN bus line may be damaged.

CAN-B Communication Circuit

ETACS-ECU

INTERFACE
CIRCUIT

INTERFACE
CIRCUIT

CAN DRIVE
CIRCUIT

HANDS FREE
MODULE

OCCUPANT
CLASSIFICATION-
ECU

SATELLITE
RADIO TUNER

RADIO AND CD
PLAYER

NOTE

VEHICLES WITHOUT MITSUBISHI MULTI-COMMUNICATION SYSTEM (MMCS)
VEHICLES WITH MITSUBISHI MULTI-COMMUNICATION SYSTEM (MMCS)

CAN
TRANSCEIVER
CIRCUIT

CAN BOX UNIT

JOINT CONNECTOR
(CAN1)

FRONT SEAT
ASSEMBLY (LH)

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-151

.

FUNCTION

If the scan tool MB991958 cannot communicate with
the CAN box unit, this diagnosis result will be set.

.

TROUBLE JUDGMENT CONDITIONS

If a communication flag is not set for the CAN box
unit, the ETACS-ECU determines that there is a fail-
ure.

.

TROUBLESHOOTING HINTS

• Malfunction of the connector [joint connector

(CAN1), CAN box unit connector improperly con-
nected]

• Malfunction of the wiring harness [open circuit

between the CAN box unit connector and the joint
connector (CAN1), power supply circuit to the
CAN box unit]

• Malfunction of the CAN box unit

DIAGNOSIS

Required Special Tools:

• MB991223: Harness Set
• MB992006: Extra Fine Probe

STEP 1. Check joint connector (CAN1) C-105, CAN box unit
connector C-15 and intermediate connector C-108 for
loose, corroded or damaged terminals, or terminals
pushed back in the connector.

CAUTION

The strand end of the twisted wire should be within 10 cm
(4 inches) from the connector. For details refer to

P.54C-7

.

Q: Are joint connector (CAN1) C-105, CAN box unit

connector C-15 and intermediate connector C-108 in
good condition?
YES : Go to Step 2.
NO : Repair the damaged parts.

AC708951BP

Connectors: C-15, C-108

C-15

C-108

AC708950

Connector: C-105

BL

DIAGNOSIS

TSB Revision

CONTROLLER AREA NETWORK (CAN)

54C-152

STEP 2. Check the wiring harness between joint connector
(CAN1) C-105 and CAN box unit connector C-15 for open
circuit.

CAUTION

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

P.54C-7

.

(1) Disconnect joint connector (CAN1) C-105 and CAN box unit

connector C-15, and check the wiring harness.

(2) Check the wiring harness between joint connector (CAN1)

C-105 (terminal 5) and CAN box unit connector C-15
(terminal 8)

OK: Continuity exists (2 Ω or less)

(3) Check the wiring harness between joint connector (CAN1)

C-105 (terminal 16) and CAN box unit connector C-15
(terminal 9)

OK: Continuity exists (2 Ω or less)

Q: Is the wiring harness between joint connector (CAN1)

C-105 and CAN box unit connector C-15 in good
condition?
YES : Check the power supply circuit of the CAN box unit.

Refer to GROUP 54A, Diagnosis <MMCS>

P.54A-457

.

NO : Repair the wiring harness between joint connector

(CAN1) C-105 and CAN box unit connector C-15.

AC709707

AC709707 CH

Harness side: C-105

Harness side: C-15

TEST
HARNESS

TEST HARNESS

AC709707 CI

Harness side: C-105

Harness side: C-15

TEST
HARNESS

TEST
HARNESS