Mitsubishi Montero (2004+). Manual — part 764
SYMPTOM PROCEDURES
TSB Revision
SIMPLIFIED WIRING SYSTEM (SWS)
54B-313
STEP 2. Check the input signal by using "DATA LIST"
menu of the SWS monitor.
Turn the passing switch to the "ON" position before checking
input signals from the passing switch.
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
.
(2) Operate scan tool MB991958 according to the procedure
below to display "COLUMN ECU."
1. Select "SYSTEM SELECT."
2. Select "SWS."
3. Select "SWS MONITOR."
4. Select "DATA LIST."
5. Select "COLUMN ECU."
(3) Check that normal conditions are displayed on the items
described in the table below.
Q: Is normal condition displayed on the "PASSING SW"?
YES : Replace the front-ECU. When the passing switch is
operated, the headlights (low-beam and high-beam)
should illuminate normally.
NO : Refer to Inspection Procedure O-6 "ETACS-ECU
does not receive any signal from the passing switch
INSPECTION PROCEDURE J-5: Headlight and Taillight: Headlights do not illuminate when the lighting
switch is at "TAIL," and "PASSING" position, but illuminate at low-beam when the switch is at "HEAD"
position. At this position, the headlights cannot be changed into high beam by operating the dimmer
switch.
NOTE: This troubleshooting procedure requires the
use of scan tool MB991958 and SWS monitor kit
MB991862. For details on how to use the SWS mon-
itor, refer to "How to use SWS monitor"
.
TECHNICAL DESCRIPTION (COMMENT)
If the headlights illuminate at low-beam regardless of
the lighting switch positions, the headlight operation
is in fail-safe mode.
.
TROUBLESHOOTING HINTS
• The column switch may be defective
• The front-ECU may be defective
• The ETACS-ECU may be defective
• The wiring harness or connectors may have
loose, corroded, or damaged terminals, or termi-
nals pushed back in the connector
ITEM NO.
ITEM NAME
NORMAL CONDITION
ITEM 03
PASSING SW
ON
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-314
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
• MB991911: MUT-III Main Harness B
• MB991813: SWS Monitor Kit
• MB991806: SWS Monitor Cartridge
• MB991812: SWS Monitor Harness (For Column-ECU)
• MB991822: Probe Harness
Use scan tool MB991958 to select "ECU COMM CHK" on
the SWS monitor display.
Check the following ECUs:
• ETACS-ECU
• Column-ECU
• Front-ECU
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
.
(2) Turn the ignition switch to the "LOCK" (OFF) position.
(3) 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."
(4) Scan tool MB991958 should show "OK" on the "ECU
COMM CHK" menus for the "ETACS ECU", "COLUMN
ECU" and "FRONT ECU" menus.
Q: Is "OK" displayed on the "ETACS ECU", "COLUMN
ECU" and "FRONT ECU" menus?
"OK" are displayed for all the items : Replace the
front-ECU. Verify that the headlights and the taillights
illuminate normally.
"NG" is displayed on the "ETACS ECU" menu : Refer to
Inspection Procedure A-3 "Communication with
ETACS-ECU is not possible
"NG" is displayed on the "COLUMN ECU" menu : Refer
to Inspection Procedure A-2 "Communication with
column switch (column-ECU) is not possible
"NG" is displayed on the "FRONT ECU" menu : Refer to
Inspection procedure A-4 "Communication with
front-ECU is not possible
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-315
INSPECTION PROCEDURE J-6: Headlight and Taillight: Any of taillights, the position lights, the side
marker light or the license plate lights do not illuminate.
FRONT-ECU
RELAY
BOX
TAILLIGHT
RELAY
LICENSE
PLATE
LIGHT
ASSEMBLY
POSITION
LIGHT
(RH)
(LH)
(LH) (RH)
REARLIGHT
TAILLIGHT
: RH
REARLIGHT
TAILLIGHT
: LH
REAR
COMBINATION
LIGHT
(RH)
REAR
COMBINATION
LIGHT
(LH)
Taillights, Position Lights and License Plate Lights Circuit
SYMPTOM PROCEDURES
TSB Revision
SIMPLIFIED WIRING SYSTEM (SWS)
54B-316
.
TECHNICAL DESCRIPTION (COMMENT)
If the position lights, the taillights, the side marker
lights or the license plate lights do not illuminate,
their bulb may be defective.
.
TROUBLESHOOTING HINTS
• The position light bulb may be defective
• The stop/taillight bulb may be defective
• The side marker light bulb may be defective
• The license plate light bulb may be defective
• The wiring harness or connectors may have
loose, corroded, or damaged terminals, or termi-
nals pushed back in the connector
AC204183
CONNECTOR : A-07X
AG
AC204167
CONNECTOR : A-18
A-18(GR)
AN
AC204166
CONNECTOR : A-36
AO
A-36(GR)
AC204170
CONNECTORS : D-28, D-125
BR
D-28
D-125
AC204171
CONNECTOR : D-111
AG
AC204178
CONNECTOR : F-10
F-10(GR)
AJ
AC204179
CONNECTORS : G-02, G-09, G-10, G-12, G-16
G-02(B)
G-16(B)
G-12(B)
G-10
G-09(B)
AI
AC204182
CONNECTOR : I-04
AF
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