Mitsubishi Galant (2004+). Manual - part 323

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-483

INSPECTION PROCEDURE L-1: Can not customize the functions by operating the multi center display
(middle-grade type).

NOTE: This troubleshooting procedure requires the
use of scan tool MB991958 and SWS monitor kit
MB991813. For details on how to use the SWS mon-
itor, refer to "How to use SWS monitor

P.54B-15

CIRCUIT OPERATION
The ETACS-ECU enables/disables the functions and
changes their operation time, based on the informa-
tion sent from the multi center display (middle-grade
type)

TECHNICAL DESCRIPTION (COMMENT)
If it is impossible to customize the functions by oper-
ating the multi center display (middle-grade type),
connector(s) or wiring harness in the CAN bus lines,
the ETACS-ECU or the multi center display unit (mid-
dle-grade type) may be defective.

TROUBLESHOOTING HINTS

• Trouble in input signal system

• The wiring harness or connectors may have

loose, corroded, or damaged terminals, or termi-
nals pushed back in the connector

• Malfunction of the multi center display (mid-

dle-grade type)

• The ETACS-ECU may be defective

DIAGNOSIS

Required Special Tools:

• MB991223: Harness Set

• MB991958: Scan Tool (MUT-III Sub Assembly)

• MB991824: Vehicle Communication Interface (V.C.I.)

• MB991827: MUT-III USB Cable

• MB991910: MUT-III Main Harness A

• MB991813: SWS Monitor Kit

• MB991806: SWS Monitor Cartridge

• MB991812: SWS Monitor Harness (For Column-ECU)

• MB991822: Probe Harness

ETACS-
ECU

MULTI CENTER
DISPLAY
(MIDDLE-GRADE TYPE)

CAN COMMUNICATION LINE
(CAN_L LINE)

CAN COMMUNICATION LINE
(CAN_H LINE)

Configuration Function

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-484

STEP 1. Using scan tool MB991958, diagnose the CAN bus
line.

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.Refer to "How to connect

SWS monitor

P.54B-13

(2) Turn the ignition switch to the "ON" position.
(3) Diagnose the CAN bus line.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the CAN bus line found to be normal?

YES : Go to Step 2.
NO : Repair the CAN bus line (Refer to GROUP 54C,

Diagnosis

P.54C-14

STEP 2. Using scan tool MB991958, read the diagnostic
trouble code related to the multi center display
(middle-grade type).

(1) Turn the ignition switch to the "ON" position.
(2) Check if the multi center display (middle-grade type) sets a

DTC.

(3) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the DTC set?

YES : Diagnose the multi center display (middle-grade type)

unit. Refer to

P.54A-237

NO : Go to Step 3.

AC305412

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

AC305412

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

SYMPTOM PROCEDURES

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SIMPLIFIED WIRING SYSTEM (SWS)

54B-485

STEP 3. Use scan tool MB991958 to select "ECU COMM
Check" on the SWS monitor display.

Check the ETACS-ECU.

CAUTION

Connect special tool MB991910 before connecting special
tool MB991812. Be sure to connect special tool MB991806
after turning on special tool MB991824.
(1) Connect the SWS monitor. Refer to "How to connect SWS

monitor

P.54B-13

(2) Turn the ignition switch to the "ON" position.
(3) Operate scan tool MB991958 according to the procedure

below to display "ECU COMM Check."
a. Select "Interactive Diagnosis."
b. Select "System select."
c. Select "SWS."
d. Select "SWS MONITOR."
e. Select "ECU COMM Check."

(4) Scan tool MB991958 should show "OK" on the "ECU

COMM Check" menu for the "ETACS ECU" menu.

Q: Is "OK" displayed for the "ETACS ECU" menu?

YES : Go to Step 4.
NO : Refer to Inspection Procedure A-3 "Communication

with the ETACS-ECU is not possible

P.54B-79

STEP 4. Replace the multi center display (middle-grade
type).
(1) Replace the multi center display (middle-grade type).
(2) Check if it is possible to customize the functions by

operating the new multi center display (middle-grade type).

Q: Is it possible to customize the functions by operating

the multi center display (middle-grade type)?
YES : No action is necessary and testing is complete.
NO : Replace the ETACS-ECU. Check that it is possible to

customize the functions by operating the multi center
display (middle-grade type).

AC305411AB

MB991910

DATA LINK

CONNECTOR

MB991827

MB991824

MB991806

MB991812

AC302210

COLUMN SWITCH
CONNECTOR

COLUMN SWITCH
CONNECTOR AT
HARNESS SIDE

MB991812

Continue

INPUT SIGNAL PROCEDURES

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SIMPLIFIED WIRING SYSTEM (SWS)

54B-486

54B

INPUT SIGNAL PROCEDURES

INSPECTION PROCEDURE M-1: ETACS-ECU does not receive any signal from the ignition switch
(ACC).

IGNITION
SWITCH (ACC)

RELAY
BOX

JUNCTION
BLOCK

ETACS-
ECU

JUNCTION BLOCK SIDE

Ignition Switch (ACC) Input Circuit

AC305231

CONNECTOR: C-29

AC305415

CONNECTOR: C-214

AC305413AB

CONNECTOR: C-219

JUNCTION BLOCK

(REAR VIEW)

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