Mitsubishi 380. Manual — part 37
SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)
54B-145
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.
CAUTION
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
."
(2) Turn the ignition switch to the "LOCK" (OFF) position.
(3) Operate 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
."
00DB076A
MB991910
DATA LINK
CONNECTOR
MB991824
MB991827
COLUMN SWITCH
CONNECTOR
COLUMN SWITCH
CONNECTOR AT
HARNESS SIDE
MB991812
SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)
54B-146
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 the 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 diagnostic tool MB991958 display "FRONT DOOR
SW" as normal condition?
YES : Go to Step 3.
NO : Refer to Inspection Procedure M-4 "ETACS-ECU
does not receive any signal from the front door
switches
."
ITEM NO.
ITEM NAME
NORMAL CONDITION
ITEM 32
FRONT DOOR SW ON
00DB076A
MB991910
DATA LINK
CONNECTOR
MB991824
MB991827
AC302210
COLUMN SWITCH
CONNECTOR
COLUMN SWITCH
CONNECTOR AT
HARNESS SIDE
MB991812
AB
SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)
54B-147
STEP 3. Check the input signal (by using the pulse check
mode of the monitor).
Check the following switches and input signals:
• Key reminder switch
• Door switches
(1) Operate diagnostic 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."
(2) Check if diagnostic tool MB991958 sounds or not.
Q: When the key reminder switch, any door switch is
operated, does diagnostic tool MB991958 sound?
Buzzer of diagnostic tool MB991958 sounds normally. :
Replace the ETACS-ECU. The forgotten key
prevention function should work normally.
When the ignition key is removed and inserted,
diagnostic tool MB991958 does not sound. : Refer to
Inspection Procedure N-1 "ETACS-ECU does not
receive any signal from the key reminder switch
."
When one of the doors is opened and closed,
diagnostic tool MB991958 does not sound : Refer to
Inspection Procedure N-3 "ETACS-ECU does not
receive any signal from any of the door switches
."
ITEM NAME
CONDITION
key reminder switch Remove and reinsert the ignition key
Door switches
Open or close one of the doors
00DB076A
MB991910
DATA LINK
CONNECTOR
MB991824
MB991827
SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)
54B-148
POWER WINDOWS
GENERAL DESCRIPTION CONCERNING THE POWER WINDOWS
M1549021900244
The following ECUs affect the functions and control
of the power windows.
• Refer to circuit diagrams GROUP-
• Refer to configuration diagrams GROUP-
FUNCTION
CONTROL ECU
Power window main
switch function
Raises the driver’s power window
Power window main switch
Lowers the driver’s power window
Power window main switch
Lowers the driver’s power window by one-touch down
function
Power window main switch
Raises the passenger’s power window
Power window main switch
Lowers the passenger’s power window
Power window main switch
Power window sub
switch function
Raises the passenger’s power window
Power window sub switch
Lowers the passenger’s power window
Power window sub switch
Power window timer function
ETACS-ECU
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