Mitsubishi Montero (2004+). Manual — part 708

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-89

STEP 2. Use scan tool MB991958 to select "ECU COMM
CHK" on the SWS monitor display.

Check the following ECUs:

• ETACS-ECU

• RV meter

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 the special tool. Refer to "How to connect SWS

monitor

P.54B-7

(2) Connect SWS monitor kit MB991862 to the data link

connector (13-pin).

(3) Turn the ignition switch to the "LOCK" (OFF) position.
(4) Operate scan tool MB991958 according to the procedure

below to display "ECU COMM CHK."

1. Select "SYSTEM SELECT."
2. Select "SWS."
3. Select "SWS MONITOR."
4. Select "ECU COMM CHK."

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

COMM CHK" menus for both the "ETACS ECU" and the
"CENTER DISP." menus.

Q: Is "OK" displayed on both the "ETACS ECU" and

"CENTER DISP." menu?
"OK" are displayed for all the items : Go to Step 3.
"NG" is displayed on the "ETACS ECU" menu : Refer to

Inspection Procedure A-3 "Communication with
ETACS-ECU is not possible

P.54B-42

."

"NG" is displayed on the "CENTER DISP." menu : Refer

to Inspection procedure A-6 "Communication with RV
meter is not possible

P.54B-69

."

AC309091

MB991911

MB991827

MB991824

AB

MB991806

MB991862

DATA LINK
CONNECTOR
(16-PIN)

DATA LINK
CONNECTOR
(13-PIN)

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-90

STEP 3. Check the input signal by using "FUNCTION
DIAG." menu of the SWS monitor.

Turn the ignition switch to the "ON" position to check the input
signals from the following switches.
Operate scan tool MB991958 according to the procedure below
to display "CENTR. DIS. ALM."

1. Select "SYSTEM SELECT."
2. Select "SWS."
3. Select "SWS MONITOR."
4. Select "FUNCTION DIAG."
5. Select "BUZZER."
6. Select "CENTR. DIS. ALM."

When the RV meter display switch is operated, check that nor-
mal conditions are displayed on the items described in the table
below.

Q: Are normal conditions displayed on the "BUZZER" and

"beep data"?
Normal conditions are displayed for all the items :

Replace the ETACS-ECU. Verify that the RV meter
operating sound function works normally.

The scan tool does not show the respective normal
condition for item "BUZZER." : Replace the ETACS-ECU.

Verify that the RV meter operating sound function
works normally.

The scan tool does not show the respective normal
condition for item "beep data." : Refer to Inspection

Procedure O-10 "ETACS-ECU does not receive
signals from any control switches

P.54B-542

."

ITEM NO.

ITEM NAME

NORMAL
CONDITION

ITEM 43

BUZZER

ON

ITEM 60

beep data

ON (2 kHz)

AC309091

MB991911

MB991827

MB991824

AB

MB991806

MB991862

DATA LINK
CONNECTOR
(16-PIN)

DATA LINK
CONNECTOR
(13-PIN)

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-91

CENTRAL DOOR LOCKING SYSTEM

GENERAL DESCRIPTION CONCERNING THE CENTRAL DOOR LOCKING SYSTEM

M1549021100088

The following ECUs affect the functions and control
of the central door locking system.

Door lock function

.

Operating the driver’s or front passenger’s door lock key
cylinder
When you insert the ignition key to the driver’s or front passen-
ger’s door lock key cylinder and turn the key clockwise to lock
the door, the ETACS-ECU energizes its door lock relay for 0.5
second to activate all the door lock actuators. Then all the
doors will be locked.

.

FUNCTION

CONTROL ECU

Door lock function

Operating the driver’s or front passenger’s door lock key
cylinder

ETACS-ECU

Operating the driver’s or front passenger’s door lock switch
Operating the driver’s door inside lock knob

Door unlock function

Operating the driver’s door lock key cylinder
Operating the front passenger’s door lock key cylinder
Operating the driver’s or front passenger’s door lock switch

Forgotten key prevention function

AC203730AB

ON

(LOCK)

OFF

DRIVER'S OR
PASSENGER'S
DOOR LOCK
KEY CYLINDER
SWITCH

0.5 second

OFF

ON

LOCK RELAY
OUTPUT

ALL DOOR'S
LOCK
ACTUATOR

UNLOCK

LOCK

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-92

Operating the driver’s or front passenger’s door lock
switch
When the door is locked by driver’s or front passenger’s door
lock switch, the ETACS-ECU energizes its door lock relay for
0.5 second to activate all the door lock actuators. Then all the
doors will be locked.

.

Operating the driver’s door inside lock knob
When the door is locked by driver's door inside lock knob, the
ETACS-ECU energizes its door lock relay for 0.5 second to
activate all the door lock actuators. Then all the doors will be
locked.

Door unlock function

.

Operating the driver’s door lock key cylinder
When you insert the ignition key to the driver’s door lock key
cylinder and turn the key counterclockwise to unlock the door,
the ETACS-ECU energizes its door unlock relay for 0.5 second
to activate only the driver’s door lock actuator. Then only the
driver’s door will be unlocked.
When you turn the key counterclockwise again, the
ETACS-ECU energizes its door unlock relay for 0.5 second to
activate all the door lock actuator. Then all the doors will be
unlocked.

.

AC203009

ON(LOCK)

ON(UNLOCK)

OFF

t: 0.5 second

OFF

ON

DRIVER'S OR
FRONT
PASSENGER'S
DOOR LOCK
SWITCH

LOCK RELAY
OUTPUT

ALL DOOR'S
LOCK ACTUATOR

UNLOCK

LOCK

AC

t

AC202980AC

UNLOCK

LOCK

t: 0.5 second

OFF

ON

UNLOCK

LOCK

t

DRIVER'S DOOR
INSIDE LOCK KNOB

LOCK RELAY OUTPUT

ALL DOOR'S LOCK
ACTUATOR

AC200017AD

ON

(UNLOCK)

OFF

DRIVER'S
DOOR LOCK
KEY CYLINDER
SWITCH

t: 0.5 second

BACK DOOR
LOCK
ACTUATOR

OFF

ON

UNLOCK RELAY
OUTPUT

LOCK

UNLOCK

LOCK

UNLOCK

DRIVER'S
DOOR LOCK
ACTUATOR

UNLOCK

LOCK

t

PASSESNGER'S
DOOR LOCK
ACTUATOR

t