2005 MITSUBISHI 380 Workshop Manual

SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-161
INSPECTION PROCEDURE D-2: Power Window: The power window timer function does not work
normally.
NOTE: This troubleshooting procedure requires use
of diagnostic tool MB991958 and SWS monitor kit
MB991813. For details on how to use the SWS mon-
itor, refer to "How to connect SWS monitor
P.54B-13."
.
CIRCUIT OPERATION
The ETACS-ECU operates the power window timer
function according to the following signals:
Ignition switch (IG1)
Front door switch
.
TECHNICAL DESCRIPTION (COMMENT)
If the power window timer function does not work
normally, its input circuit, the ETACS-ECU or the
front-ECU may be defective.
.
TROUBLESHOOTING HINTS
Refer to circuit diagrams GROUP-90
Refer to configuration diagrams GROUP-80
The wiring harness or connectors may have
loose, corroded, or damaged terminals, or termi-
nals pushed back in the connector
The ETACS-ECU may be defective

SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-162
DIAGNOSIS
Required Special Tools:
MB991223: Harness Set
MB991958: diagnostic 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: Test Probe Harness
STEP 1. Use diagnostic tool MB991958 to select "ECU
COMM Check" on the SWS monitor display.
Check the ETACS-ECU.
To prevent damage to diagnostic tool MB991958, always
turn the ignition switch to the "LOCK" (OFF) position
before connecting or disconnecting diagnostic tool
MB991958. Connect special tool MB991910 before con-
necting 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 P.54B-13."
(2) Turn the ignition switch to the "ON" position.
(3) Operate the diagnostic 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) diagnostic 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 2.
NO : Refer to Inspection Procedure A-3 "Communication
with the ETACS-ECU is not possible P.54B-74."

SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-163
STEP 2. Check the input signal by using "DATA LIST"
menu of the SWS monitor.
Turn the ignition switch to the "ON" position before checking
input signals from the ignition switch (IG1).
(1) Operate diagnostic tool MB991958 according to the
procedure below to display "ETACS ECU."
a. Select "Interactive Diagnosis."
b. Select "System select."
c. Select "SWS."
d. Select "SWS MONITOR."
e. Select "Data List."
f. Select "ETACS ECU."
(2) Check that normal conditions are displayed for the items
described in the table below.
Q: Does the diagnostic tool MB991958 display the items
"IG SW (IG1)", "FRONT DOOR SW" as normal
condition?
Normal condition displayed for all the items : Replace
the ETACS-ECU. Verify that the power window timer
works normally.
Normal condition is not displayed for "IG SW (IG1)" :
Refer to Inspection Procedure M-2 "ETACS-ECU
does not receive any signal from the ignition switch
(IG1) P.54B-408."
Normal condition is not displayed for "FRONT DOOR
SW" : Refer to Inspection Procedure M-4 "ETACS-ECU
does not receive any signal from the front door
switches P.54B-413." ITEM NO. ITEM NAME NORMAL CONDITION
ITEM 30 IG SW (IG1) OFF
ITEM 32 FRONT DOOR SW

SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-164
INSPECTION PROCEDURE D-3: Power Window: Only the front door window (RH) does not work by
operating power window main switch.
.
CIRCUIT OPERATION
The front power window regulator motor (RH) lower
or raises the door window (RH) when the power win-
dow main switch is moved to "UP" or "DOWN" posi-
tion.
.
TECHNICAL DESCRIPTION (COMMENT)
The power window main switch or the front power
window regulator motor (RH) may be defective.
.
TROUBLESHOOTING HINTS
Refer to circuit diagrams GROUP-90
Refer to configuration diagrams GROUP-80
The power window main switch may be defective
The front power window regulator motor (RH)
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
SIMPLIFIED WIRING SYSTEM (SWS)54B-165
DIAGNOSIS
Required Special Tool:
MB991223: Harness Set
STEP 1. Check power window main switch connector E-04
and front power window regulator motor (RH) connector
E-03 for loose, corroded or damaged terminals, or
terminals pushed back in the connector.
Q: Are power window main switch connector E-04 and
front power window regulator motor (RH) connector
E-03 in good condition?
YES : Go to Step 2.
NO : Repair or replace the damaged component(s). Refer
to GROUP 00E, Harness Connector Inspection
P.00E-2. When the power window main switch is
operated, the front power window (RH) should lower
or raise normally.
STEP 2. Check the power window main switch.
(1) Remove the power window main switch. Refer to GROUP
42, Door, Door Glass and Regulator P.42-39.
(2) Check continuity while power window main switch is moved
to "UP" and "DOWN" position.
Q: Is the power window main switch normal?
YES : Go to Step 3.
NO : Replace the power window main switch. When the
power window main switch is operated, the front
power window (RH) should lower or raise normally.
FRONT (RH)
SWITCH
POSITIONTESTER
CONNECTIONSPECIFIED
CONDITION
UP 12
10, 14 2 Less than 2 ohms
OFF 12
14, 12 2,
14
2
DOWN 12
2, 14 10

SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-166
STEP 3. Check the front power window regulator motor
(RH).
(1) Remove the front power window regulator motor (RH).
Refer to GROUP 42, Door, Door Glass and Regulator
P.42-39.
(2) Connect a battery to the motor terminal, and check that the
motor runs freely.
Q: Is the front power window regulator motor (RH) normal?
YES : Go to Step 4.
NO : Replace the front power window regulator motor
(RH). When the power window main switch is
operated, the front power window (RH) should lower
or raise normally.
STEP 4. Check the wiring harness between power window
main switch connector E-04 (terminals 12 and 14) and front
power window regulator motor (RH) connector E-03
(terminals 2 and 1).
Q: Is the wiring harness between power window main
switch connector E-04 (terminals 12 and 14) and front
power window regulator motor (RH) connector E-03
(terminals 2 and 1) in good condition?
YES : No action is necessary and testing is complete.
NO : The wiring harness may be damaged or the
connector(s) may have loose, corroded or damaged
terminals, or terminals pushed back in the connector.
Repair the wiring harness as necessary. When the
power window main switch is operated, the front
power window (RH) should lower or raise normally. BATTERY CONNECTION SLIDER POSITION
Connect terminal 1 to the
negative battery terminal
Connect terminal 2 to the
positive battery terminalUP
Connect terminal 2 to the
negative battery terminal
Connect terminal 1 to the
positive battery terminalDOWN

SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-167
INSPECTION PROCEDURE D-4: Power Window: Power windows do not work normally by operating
the front passenger's or rear passenger's sub switches.
.

SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-168
CIRCUIT OPERATION
power window regulator motors raise and lower the
door windows when the front passenger's or rear
passenger's sub switch is moved to "UP" or "DOWN"
position.
.
TECHNICAL DESCRIPTION (COMMENT)
A power window sub switch or power window regula-
tor motor may be defective. Or, the power window
lock switch (incorporated in the power window main
switch in the driver’s door) may remain pressed in
the "LOCK" position.
.
TROUBLESHOOTING HINTS
Refer to circuit diagrams GROUP-90
Refer to configuration diagrams GROUP-80
The power window main switch may be defective
The front power window sub switch may be
defective
The rear power window sub switches may be
defective
The front power window regulator motor (RH)
may be defective
The rear power window regulator motors 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 Tool:
MB991223: Harness Set
STEP 1. Check power window main switch connector E-04
for loose, corroded or damaged terminals, or terminals
pushed back in the connector.
Q: Is power window main switch connector E-04 in good
condition?
YES : Go to Step 2.
NO : Repair or replace the damaged component(s). Refer
to GROUP 00E, Harness Connector Inspection
P.00E-2. When the front power window sub switch
(LH) is operated, the front power window (LH) should
raise and lower normally.