Mitsubishi Montero (2002-2004). Manual — part 294
SYMPTOM PROCEDURES
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SWS SYMPTOM PROCEDURES
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DIAGNOSIS
Required Special Tools:
• MB991223: Harness Set
• MB991502: Scan Tool (MUT-II)
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 MB991502, always turn the
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991502.
(1) Connect scan tool MB991502 to the data link connector
(16-pin).
(2) Operate scan tool MB991502 according to the procedure
below to display "PULSE CHECK."
1. Select "SYSTEM SELECT."
2. Select "SWS."
3. Select "PULSE CHECK."
(3) When each function of the sunroof switch is operated
(turned on), check that scan tool MB991502 sounds.
Q: Does scan tool MB991502 sound when the sunroof
switch is operated?
YES : Replace the sunroof motor assembly. The sunroof
function should now work normally.
NO : Refer to Inspection Procedure O-9 "ETACS-ECU
does not receive a signal from "UP, ""OPEN" or
"CLOSE/DOWN" switch
INSPECTION PROCEDURE F-3: Sunroof: Sunroof timer function does not work normally.
NOTE: This troubleshooting procedure requires the
use of scan tool MB991502 and SWS monitor kit
MB991862. For details on how to use the SWS mon-
itor, refer to "How to use SWS monitor
.
AC101570AB
MB991502
16 PIN
COLUMN
SWITCH
CONNECTOR
Sunroof Timer Function
SYMPTOM PROCEDURES
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SWS SYMPTOM PROCEDURES
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CIRCUIT OPERATION
• The sunroof timer function works according to the
signals from the following switches:
• Ignition switch (IG1): OFF
• Driver’s and passenger’s door switch: OFF
• Vehicle condition
• Ignition switch: LOCK position
• Driver’s and passenger’s door: Closed
• When a front door is opened and closed while the
sunroof timer function is on, the sunroof operative
duration will be changed.
.
TECHNICAL DESCRIPTION (COMMENT)
If 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 driver's or passenger's 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
SYMPTOM PROCEDURES
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SWS SYMPTOM PROCEDURES
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DIAGNOSIS
Required Special Tools:
• MB991223: Harness Set
• MB991502: Scan Tool (MUT-II)
• MB991862: SWS Monitor Kit
STEP 1. Use scan tool MB991502 to select "ECU COMM
CHK" on the SWS monitor display.
Check the following ECUs:
• ETACS-ECU
• Sunroof motor assembly (sunroof-ECU)
CAUTION
To prevent damage to scan tool MB991502, always turn the
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991502.
(1) Connect scan tool MB991502 to the data link connector
(16-pin).
(2) Connect SWS monitor kit MB991862 to the data link
connector (13-pin).
(3) Turn the ignition switch to the "ON" position.
(4) Operate scan tool MB991502 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 MB991502 should show "OK" on the "ECU
COMM CHK" menus for the "ETACS ECU" and "SUNROOF
ECU" menus.
Q: Is "OK" displayed on the "ETACS ECU" and "SUNROOF
ECU" menus?
"OK" are displayed for all the items : Go to Step 2.
"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 "SUNROOF ECU" menu :
Refer to Inspection Procedure A-5 "Communication
with sunroof motor (sunroof-ECU) is not possible
AC204222AB
16-pin
13-pin
MB991502
MB991862
SYMPTOM PROCEDURES
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SWS SYMPTOM PROCEDURES
54Bb-226
STEP 2. Check the input signal by using "FUNCTION
DIAG." menu of the SWS monitor.
(1) Turn the ignition switch to the "OFF" position to check the
input signals from the following switches.
(2) Operate scan tool MB991502 according to the procedure
below to display "SUNROOF-OPE."
1. Select "SYSTEM SELECT."
2. Select "SWS."
3. Select "SWS MONITOR."
4. Select "FUNCTION DIAG."
5. Select "SUNROOF."
6. Select "SUNROOF-OPE."
(3) Check that normal conditions are displayed on the items
described in the table below.
Q: Are normal conditions displayed on the "IG SW (IG1)"
and "S/R ECU ACK"?
YES : Replace the sunroof motor assembly. The sunroof
timer function should now work normally.
NO :
• Normal condition is not displayed on the "IG
SW(IG1)": Refer to Inspection Procedure O-2
"ETACS-ECU does not receive a signal from the
ignition switch (IG1)
• Normal condition is not displayed on the "S/R
ECU ACK": Replace the sunroof motor assembly.
The sunroof timer function should now work
normally.
INSPECTION PROCEDURE F-4: Sunroof: Safety mechanism does not function.
.
TECHNICAL DESCRIPTION (COMMENT)
The sunroof motor assembly monitors load condition
according to the current, which runs in the motor. If a
predetermined current is exceeded, the sunroof
motor reverses due to safety mechanism. If the sun-
roof motor does not reverse when an excessive load
is applied, the sunroof motor assembly may be
defective.
.
TROUBLESHOOTING HINT
The sunroof motor assembly may be defective
.
DIAGNOSIS
Replace the sunroof motor assembly.
Verify the sunroof safety mechanism should now work nor-
mally.
ITEM NO.
ITEM NAME
NORMAL
CONDITION
ITEM 30
IG SW (IG1)
OFF
ITEM 72
S/R ECU ACK
NORMAL ACK
AC204222AB
16-pin
13-pin
MB991502
MB991862
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