Mitsubishi Galant (2004+). Manual — part 267
SYMPTOM PROCEDURES
TSB Revision
SIMPLIFIED WIRING SYSTEM (SWS)
54B-259
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
Check the input signal (by using the pulse check mode of
the monitor).
Check the input signals from the sunroof 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 scan tool MB991958.Refer to "How to connect
."
(2) Operate the scan tool MB991958 according to the
procedure below to display "Pulse check."
a. Select "Interactive Diagnosis."
b. Select "System select."
c. Select "SWS."
d. Select "Pulse Checking."
(3) When each function of the sunroof switch is operated
(turned on), check that scan tool MB991958 sounds.
Q: Does scan tool MB991958 sound when the sunroof
switch is operated?
YES : Replace the sunroof motor assembly. Check that the
sunroof works at all positions normally.
NO : Refer to Inspection Procedure M-8 "ETACS-ECU
does not receive any signal from the up, open or
close/down switch
."
AC305412
AB
MB991910
DATA LINK
CONNECTOR
MB991824
MB991827
SYMPTOM PROCEDURES
TSB Revision
SIMPLIFIED WIRING SYSTEM (SWS)
54B-260
INSPECTION PROCEDURE F-3: Sunroof: Sunroof Timer Function does not Work Normally.
NOTE: This troubleshooting requires use of scan tool
MB991958 and SWS monitor kit MB991813. For
details of how to use the SWS monitor, refer to "How
to use SWS monitor
.
CIRCUIT OPERATION
• The sunroof timer function works according to the
signals from the following switches:
• Ignition switch (IG1): OFF
• Front door switch: OFF
• Vehicle condition
• Ignition switch: LOCK position
• Front door: Closed
• When the driver’s door is opened and closed
while the sunroof timer function is on, the sunroof
operative duration will be changed.
.
TECHNICAL DESCRIPTION (COMMENT)
Is the sunroof timer function does not work normally,
the input circuits from the switches described in
"CIRCUIT OPERATION", the sunroof motor assem-
bly, the ETACS-ECU or the SWS communication line
may be defective.
.
TROUBLESHOOTING HINTS
• The front door switch may be defective
• The sunroof motor assembly may be defective
• The wiring harness or connectors may have
loose, corroded, or damaged terminals, or termi-
nals pushed back in the connector
DIAGNOSIS
Required Special Tools:
• MB991223: Test 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
SUNROOF-ECU
SUNROOF MOTOR
ASSEMBLY
·
FRONT DOOR
SWITCH (LH)
· IGNITION SWITCH (IG1)
· SUNROOF ECU ACK
INPUT SIGNAL
Sunroof Timer Function
SYMPTOM PROCEDURES
TSB Revision
SIMPLIFIED WIRING SYSTEM (SWS)
54B-261
STEP 1. Use scan tool MB991958 to select "ECU COMM
Check" on the SWS monitor display.
Check the following ECUs:
• ETACS-ECU
• Sunroof-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. 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 special tool. Refer to "How to connect SWS
monitor
."
(2) Turn the ignition switch to the "LOCK" (OFF) position.
(3) Operate the 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" menus for both the "ETACS ECU" and the
"SUNROOF ECU" menus.
Q: Is "OK" displayed for both the "ETACS ECU" and
"SUNROOF ECU" menus?
"OK" is displayed for all the items : Go to Step 2.
"NG" is displayed for the "ETACS ECU" menu : Refer to
Inspection Procedure A-3 "Communication with the
ETACS-ECU is not possible
"NG" is displayed for the "SUNROOF ECU" menu :
Refer to Inspection Procedure A-5 "Communication
with the sunroof-ECU is not possible
AC305411AB
MB991910
DATA LINK
CONNECTOR
MB991827
MB991824
MB991806
MB991812
AC302210
COLUMN SWITCH
CONNECTOR
COLUMN SWITCH
CONNECTOR AT
HARNESS SIDE
MB991812
AB
SYMPTOM PROCEDURES
TSB Revision
SIMPLIFIED WIRING SYSTEM (SWS)
54B-262
STEP 2. Check the input signal by using "FUNCTION
DIAG." menu of the SWS monitor.
Observe how the input signal is changed when the ignition
switch is turned from the ON position to the "LOCK" (OFF)
position.
(1) Operate the MUT-III according to the procedure below to
display "SUNROOF-OPE."
a. Select "Interactive Diagnosis."
b. Select "System select."
c. Select "SWS."
d. Select "SWS MONITOR."
e. Select "Function Diag."
f. Select "SUNROOF."
g. Select "SUNROOF-OPE."
(2) Check that normal conditions are displayed for the items
described in the table below.
Q: Does the MUT-III display the items "IG SW (IG1)" and
"S/R ECU ACK" as normal condition?
Normal conditions displayed for all the items : Replace
the sunroof motor assembly. Check that the sunroof
timer function works normally.
Normal condition is not displayed for the "IG SW (IG1)" :
Refer to Inspection Procedure M-2 "ETACS-ECU
does not receive a signal from the ignition switch
(IG1)
Normal condition is not displayed for the "S/R ECU
ACK" : Replace the sunroof motor assembly. Check that the
sunroof timer function works normally.
ITEM NO.
ITEM NAME
NORMAL
CONDITION
ITEM 30
IG SW (IG1)
OFF
ITEM 72
S/R ECU ACK
NORMAL ACK
AC305411AB
MB991910
DATA LINK
CONNECTOR
MB991827
MB991824
MB991806
MB991812
AC302210
COLUMN SWITCH
CONNECTOR
COLUMN SWITCH
CONNECTOR AT
HARNESS SIDE
MB991812
AB
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