2005 MITSUBISHI 380 service

54B-1
GROUP 54B
SIMPLIFIED WIRING
SYSTEM (SWS)
CONTENTS
GENERAL DESCRIPTION. . . . . . . . .54B-2
COMMUNICATION METHOD . . . . . . . . . . 54B-2
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . 54B-2
SPECIAL TOOL . . . . . . . . . . . . . . . . .54B-8
SWS DIAGNOSIS . . . . . . . . . . . . . . .54B-10
GENERAL DESCRIPTION . . . . . . . . . . . . . 54B-10
BEFORE CARRYING OUT
TROUBLESHOOTING . . . . . . . . . . . . . . . . 54B-10
DIAGNOSTIC FUNCTION . . . . . . . . . . . . . 54B-10
SWS DIAGNOSTIC TROUBLESHOOTING
STRATEGY . . . . . . . . . . . . . . . . . . . . . . . . . 54B-12
HOW TO CONNECT SWS MONITOR . . . . 54B-13
HOW TO CHECK ECUS . . . . . . . . . . . . . . . 54B-15
SERVICE DATA CHECK . . . . . . . . . . . . . . 54B-15
PULSE CHECK . . . . . . . . . . . . . . . . . . . . . . 54B-24
DIAGNOSTIC TROUBLE CODE
CHART . . . . . . . . . . . . . . . . . . . . . . . .54B-25
DIAGNOSTIC TROUBLE CODE
PROCEDURES . . . . . . . . . . . . . . . . .54B-25
SYMPTOM CHART . . . . . . . . . . . . . .54B-57
INPUT SIGNAL CHART . . . . . . . . . . .54B-61
SYMPTOM PROCEDURES . . . . . . . .54B-63
TONE ALARM . . . . . . . . . . . . . . . . . . . . . . . 54B-94
GENERAL DESCRIPTION CONCERNING
THE TONE ALARM. . . . . . . . . . . . . . . . . . . 54B-94
CENTRAL DOOR LOCKING SYSTEM. . . . 54B-118GENERAL DESCRIPTION CONCERNING
CENTRAL DOOR LOCKING SYSTEM . . . . 54B-118
POWER WINDOWS . . . . . . . . . . . . . . . . . . 54B-148
GENERAL DESCRIPTION CONCERNING
THE POWER WINDOWS . . . . . . . . . . . . . . 54B-148
KEYLESS ENTRY SYSTEM . . . . . . . . . . . . 54B-187
GENERAL DESCRIPTION CONCERNING
THE KEYLESS ENTRY SYSTEM . . . . . . . . 54B-187
SUNROOF . . . . . . . . . . . . . . . . . . . . . . . . . . 54B-209
GENERAL DESCRIPTION CONCERNING
THE SUNROOF . . . . . . . . . . . . . . . . . . . . . 54B-209
WINDSHIELD WIPER AND WASHER . . . . 54B-223
GENERAL DESCRIPTION CONCERNING
THE WINDSHIELD WIPER AND WASHER 54B-223
HEADLAMP AND TAILLAMP . . . . . . . . . . . 54B-257
GENERAL DESCRIPTION CONCERNING
THE HEADLAMPS AND TAILLAMPS . . . . . 54B-257
FLASHER TIMER . . . . . . . . . . . . . . . . . . . . 54B-309
GENERAL DESCRIPTION CONCERNING
THE FLASHER TIMER . . . . . . . . . . . . . . . . 54B-309
FOG LAMP . . . . . . . . . . . . . . . . . . . . . . . . . 54B-339
GENERAL DESCRIPTION CONCERNING
THE FOG LAMPS . . . . . . . . . . . . . . . . . . . . 54B-339
INTERIOR LAMP . . . . . . . . . . . . . . . . . . . . . 54B-355
GENERAL DESCRIPTION CONCERNING
THE INTERIOR LAMP . . . . . . . . . . . . . . . . 54B-355
INPUT SIGNAL PROCEDURES . . . . .54B-405
CHECK AT ECU TERMINAL . . . . . . .54B-480
ON-VEHICLE SERVICE . . . . . . . . . . .54B-486
CONFIGURATION FUNCTION . . . . . . . . . . 54B-486

SPECIAL TOOL
SIMPLIFIED WIRING SYSTEM (SWS)54B-8
SPECIAL TOOLM1549000301035
TOOL TOOL NUMBER
AND NAMESUPERSESSION APPLICATION
MB991958
A: MB991824
B: MB991827
C: MB991910
D: MB991911
E: MB991914
F: MB991825
G: MB991826
MUT-III sub
assembly
A: Vehicle
communication
interface (V.C.I.)
B: MUT-III USB
cable
C: MUT-III main
harness a
(vehicles with
CAN
communication
system)
D: MUT-III Main
Harness B
(Vehicles without
CAN
communication
system)
E: MUT-III main
harness C (for
Daimler Chrysler
models only)
F: MUT-III
measurement
adapter
G: MUT-III trigger
harnessMB991824-KIT
NOTE: . G:
MB991826 MUT-III
Trigger Harness is not
necessary when
pushing V.C.I. ENTER
key.SWS communication line check
(ECU check and service data)
For vehicles with CAN
communication, use MUT-III
main harness A to send
simulated vehicle speed. If you
connect MUT-III main harness B
instead, the CAN
communication does not
function correctly.

SPECIAL TOOL
SIMPLIFIED WIRING SYSTEM (SWS)54B-9
MB991813
A: MB991806
B: MB991812
C: MB991822
SWS monitor kit
A: SWS monitor
cartridge
B: SWS monitor
harness (for
column-ECU)
C: Probe harness- SWS communication line check
(ECU check and service data)
MB991529
Diagnostic trouble
code check harnessTool not necessary if
the diagnostic tool
(MUT-III) is availableChecking input signal when using
a voltmeter
MB991223
A: MB991219
B: MB991220
C: MB991221
D: MB991222
Harness set
A: test harness
B: LED harness
C: LED harness
adaptor
D: ProbeGeneral service tools Making voltage and resistance
measurement during
troubleshooting
A: Connector pin contact
pressure inspection
B: Power circuit inspection
C: Power circuit inspection
D: Commercial tester connection TOOL TOOL NUMBER
AND NAMESUPERSESSION APPLICATION

SWS DIAGNOSIS
SIMPLIFIED WIRING SYSTEM (SWS)54B-12
HOW TO DIAGNOSE THE CAN BUS LINES
Required Special Tools:
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
To prevent damage to diagnostic tool MB991958, always
turn the ignition switch to the "LOCK" (OFF) position
before connecting or disconnecting diagnostic tool
MB991958.
1. Connect diagnostic tool MB991958 to the data link
connector.
2. Turn the ignition switch to the "ON" position.
3. Select "CAN bus diagnosis" from the start-up screen.
4. When the vehicle information is displayed, confirm that it
matches the vehicle being diagnosed.
If they match, go to step 8.
If not, go to step 5.
5. Select the "view vehicle information" button.
6. Enter the vehicle information and select the "OK" button.
7. When the vehicle information is displayed, confirm again
that it matches the vehicle being diagnosed.
If they match, go to step 8.
If not, go to step 5.
8. Select the "OK" button.
9. When the optional equipment screen is displayed, choose
the one which the vehicle is fitted with, and then select the
"OK" button.
SWS DIAGNOSTIC TROUBLESHOOTING STRATEGYM1549000500906
1. Gather information about the problem from the
customer.
2. Verify that the condition described by the
customer exists.
NOTE: If an error occurs in the SWS communica-
tion line, the ECU isolated from the communica-
tion line performs a fail-safe or backup operation,
so the problem may not match the one shown in
the Trouble Symptom Chart. However, the cause
of the failure can be tracked down by performing
the following troubleshooting with the SWS moni-
tor.
3. Version number and destination check
Check whether the SWS version number and
destination meet the vehicle specifications. If they
are different, replace the ETACS-ECU with a
correct one.
4. Use diagnostic tool MB991958 (MUT-III Sub
Assembly) to select "ECU COMM Check" on the
SWS monitor display.Check whether the communication status of the
input- or output-signal-side ECU associated with
the defective function is normal.
If "OK" is displayed for all related ECUs, they
communicate with each other normally and the
input or output signal circuit system may be
defective. Therefore, check SWS monitor service
data.
If "NG" is displayed for any of the related ECUs,
something may be wrong with the ECU for which
"NG" appears, its power supply or grounding sys-
tem, or a wiring harness or connector between
the SWS monitor and the ECU. Check the wiring
harness and connectors associated with the ECU
and examine the ECU itself.
5. Service data on the SWS monitor
Select the defective function from the
function-specific diagnostic menu, and check the
service data that appears for each function item.

SWS DIAGNOSIS
SIMPLIFIED WIRING SYSTEM (SWS)54B-13
When the SWS communication line is monitored,
you can determine whether the problem lies in the
input or output signal circuit system by checking
whether communication data is correct:
If the switch condition does not meet the service
data display, the input signal is defective.
If the switch condition meets the service data dis-
play, the output signal system is defective.
Refer to circuit diagrams GROUP-90
Refer to configuration diagrams GROUP-80NOTE: In addition to the function-specific diag-
nostic menu, a service data menu is available for
SWS monitor service data to check all items for
each ECU.
6. Check the input signal circuit system
Check the relevant switch, sensor, input
signal-side ECU and their wiring harness and
connector.
7. Check the output signal circuit system
Check an output signal-side ECU, electrical load
components and their wiring harness and
connector.
HOW TO CONNECT SWS MONITORM1549014800706
Required Special Tools:
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: Probe Harness
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 the main harness A MB991910 before
connecting the SWS monitor harness (for column-ECU)
MB991812. Be sure to connect SWS monitor cartridge
MB991806 after turning on the V.C.I. MB991924.
1. Ensure that the ignition switch is at the "LOCK" (OFF)
position.
2. Start up the personal computer.
3. Connect special tool MB991827 to special tool MB991824
and the personal computer.
4. Connect special tool MB991910 to special tool MB991824.
5. Connect special tool MB991910 to the data link connector.

SWS DIAGNOSIS
SIMPLIFIED WIRING SYSTEM (SWS)54B-15
HOW TO CHECK ECUSM1549014900640
1. Use the diagnostic tool MB991958 (MUT-III Sub
Assembly) and the SWS monitor kit to check
ECUs.
2. The following ECUs can be checked by using the
diagnostic tool MB991958 (MUT-III Sub
Assembly) and the SWS monitor kit.NOTE: The "ECU COMM Check" function checks
the communication status of ECUs. "NG" does not
always mean ECU malfunction. If a malfunction is
found by the "ECU COMM Check", proceed to
"Symptom Procedure" (Refer to P.54B-57).
SWS monitor kit-compatible ECUs and their conditions
NOTE: .
*1: If the ignition switch is turned to "LOCK" (OFF)
or "ACC" when "NG" is displayed beside "ETACS
ECU" or the signal request line is abnormal, the
diagnostic tool shows "NG" beside the "COLUMN
ECU".
*2: When "NG" is displayed beside "ETACS
ECU", the diagnostic tool shows "NG" beside the
"FRONT ECU" and "SUNROOF ECU".
SERVICE DATA CHECKM1549015000714
Use the diagnostic tool MB991958 (MUT-III Sub
Assembly) and the SWS monitor kit to check
"Data List" or "Function Diag.". This "Data List" or
"Function Diag." check is applicable for signals,
which are transmitted and received through the
SWS communication line. For input signals, which
are not compatible with the SWS monitor kit, refer
to the Pulse Check procedure (by using the
diagnostic tool or voltmeter) P.54B-24.1. The following input signals can be checked by
using the diagnostic tool MB991958 (MUT-III Sub
Assembly) and the SWS monitor kit.
NOTE: If a problem is found in the "Service Data"
check, refer to Input Signal Chart P.54B-61.

The table below shows the service data and their
normal condition, which are displayed during the
"Data List."
.
ITEM
No.ECUS TO BE
CHECKEDDISPLAY ON
DIAGNOSTIC
TOOLNORMAL
CONDITI
ONECU CONDITION
80 Column switch
(column-ECU)COLUMN ECU
OK*
1All of the column switch, power supply,
ground and interconnecting
communication lines are normal
83 ETACS-ECU ETACS-ECU OK All of the ETACS-ECU switch, power
supply, ground and interconnecting
communication lines are normal
84 Front-ECU FRONT ECU
OK*
2All of the front-ECU, power supply, ground
and interconnecting communication lines
are normal
86 Sunroof motor
assembly
(sunroof-ECU)SUNROOF ECU
OK*
2All of the sunroof motor assembly, power
supply, ground and interconnecting
communication lines are normal

SWS DIAGNOSIS
SIMPLIFIED WIRING SYSTEM (SWS)54B-18
Front-ECU, P/W, S/R
NOTE: For item No.70, the diagnostic tool
MB991958 (MUT-III Sub Assembly) also displays
"NG" under "ECU COMM Check" when it displays
"NO ACK" under the front-ECU check.NOTE: For item No.72, the diagnostic tool
MB991958 (MUT-III Sub Assembly) also displays
"NG" under "ECU COMM Check" when it displays
"NO ACK" under the sunroof-ECU check.

The table below shows the service data and their
normal condition, which are displayed during the
"Function Diag." The column "Normal condition"
shows values that are shown when each operation is
made.
.
CHECK
ITEMITEM NO. DISPLAY ON
DIAGNOSTIC
TOOLCHECK CONDITION NORMAL
CONDITION
Response by
the
front-ECU70 FRONT ECU
ACKLighting switch: Other than OFF (excluding
when high-beam is on) or the wiper switch
is at position other than OFF (ignition
switch: ACC or ON)NORMAL ACK
Ignition switch: Other than ON
Lighting switch: OFF
Wiper switch: OFFSLEEP ACK
Lighting switch: HEAD
Headlights: at high beamHI-BEAM ACK
Other than the condition above NO ACK
Response by
the
sunroof-ECU72 S/R ECU ACK
1. Door switch: OFF
2. Ignition switch: ON
OFF
3. While sunroof is offNORMAL ACK

SLEEP ACK (after
approximately 30
seconds)
1. Ignition switch: ON or START
2. One of the sunroof switches is onINPUT CHECK to
NORMAL ACK
Other than the above conditions NO ACK

INPUT SIGNAL PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-473
DIAGNOSTIC PROCEDURE
Step 1. Pulse check
Check whether the ETACS-ECU receives signal from a trans-
mitter or not. For this check, you should use the 4-button-type
transmitter (integrated with a key), which has already been reg-
istered.
NOTE: For how to register the keyless entry transmitter
encrypted code, refer to GROUP 42
On-vehicle Service
P.42-73.
OK: The MUT-III sounds or the voltmeter needle fluctu-
ates.
Q: Is the check result normal?
YES : Go to Step 2.
NO : Go to Step 4.
Step 2. Check the transmitter battery.
Refer to GROUP 42
Keyless entry system P.42-70.
Q: Is the check result normal?
YES : Go to Step 3.
NO : Replace the keyless entry key integrated transmitter
battery.
Step 3. Register the encrypted code, and then retest the
system.
(1) Register the keyless entry transmitter again.
(2) Check that each signal is received from the keyless entry
transmitter.
Q: Is the check result normal?
YES : The trouble can be an intermittent malfunction (Refer
to GROUP 00
How to Cope with Intermittent
Malfunction P.00-14).
NO : Replace the keyless entry transmitter.
Step 4. Retest the system.
Check that each signal is received from the keyless entry key
integrated transmitter.
Q: Is the check result normal?
YES : The trouble can be an intermittent malfunction (Refer
to GROUP 00
How to Cope with Intermittent
Malfunction P.00-14).
NO : Replace the ETACS-ECU. System switch Check condition
Keyless entry transmitter
"LOCK/UNLOCK" switchWhen the switch is
turned from off to on
Keyless entry transmitter
"Panic" switchWhen the switch is
turned from off to on
Keyless entry transmitter
"Trunk" switchWhen the switch is
turned from off to on