2005 MITSUBISHI 380 trunk

SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-374
STEP 15. Check trunk lamp connector D-10, ETACS-ECU
connectors C-218 and C-219 for loose, corroded or
damaged terminals, or terminals pushed back in the
connector.
Q: Is trunk lamp connector D-10, ETACS-ECU connectors
C-218 and C-219 in good condition?
YES : Go to Step 16.
NO : Repair or replace the damaged component(s). Refer
to GROUP 00E, Harness Connector Inspection
P.00E-2. Check that the trunk lamp illuminates
normally.
STEP 16. Check the trunk lamp bulb.
Q: Is the trunk lamp bulb in good condition?
YES : Go to Step 17.
NO : Replace the trunk lamp bulb. Check that the trunk
lamp illuminates normally.

SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-375
STEP 17. Check the wiring harness between trunk lamp
connector D-10 (terminals 1 and 2) and ETACS-ECU
connector C-219 (terminal 6) or C-218 (terminal 46).

SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-376
NOTE: Also check intermediate connector C-28 and junction
block connector C-204 for loose, corroded, or damaged termi-
nals, or terminals pushed back in the connector. If intermediate
connector C-28 or junction block connector C-204 is damaged,
repair or replace the damaged component(s) as described in
GROUP 00E, Harness Connector Inspection P.00E-2.
Q: Is the wiring harness between trunk lamp connector
D-10 (terminals 1 and 2) and ETACS-ECU connector
C-219 (terminal 6) or C-218 (terminal 46) in good
condition?
YES : Replace the trunk lamp. Check that the trunk lamp
illuminates normally.
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. Check that
the trunk lamp illuminates normally.
INSPECTION PROCEDURE K-3: Interior lamp: Dome lamp dimming function does not work normally.
NOTE: This troubleshooting procedure requires the
use of diagnostic tool MB991958 and SWS monitor
kit MB991813. For details on how to use the SWS
monitor, refer to "How to connect SWS monitor
P.54B-13."
.

SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-380
STEP 5. Check the input signal (by using the pulse check
mode of the monitor).
Check the input signals from the following switches:
Key reminder switch
Door switches
Trunk lid latch assembly
(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, or the
trunk lid is operated, does diagnostic tool MB991958
sound?
Buzzer of diagnostic tool MB991958 sounds normally. :
Replace the ETACS-ECU. Verify that the dome lamp
dimming function works normally.
Diagnostic tool MB991958 does not sound when the
ignition key is removed and reinserted : Refer to
Inspection Procedure N-1 "ETACS-ECU does not
receive a signal from the key reminder switch
P.54B-432."
Diagnostic tool MB991958 does not sound whenever a
door switch is operated : Refer to Inspection Procedure
N-3 "ETACS-ECU does not receive any signal from
any of the door switches P.54B-440."
When the trunk lid is opened and closed, diagnostic
tool MB991958 does not sound. : Refer to Inspection
Procedure N-7 "ETACS-ECU does not receive any
signal from trunk lid latch assembly P.54B-469." ITEM NAME CONDITION
key reminder switch Remove and reinsert the ignition
key
door switches Open or close one of the doors
trunk lid latch assembly Open or close the trunk lid

SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-390
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. Check the interior lamps.
If the interior lamp switch is moved to the "door interlock posi-
tion", the interior lamps should illuminate when either door is
opened.
Q: Do the interior lamp illuminate normally?
All the interior lamps illuminate normally. : Go to Step 2.
None of the interior lamps illuminate normally. : Refer to
Inspection Procedure K-1 "The dome lamp do not
illuminate and go out normally P.54B-359."
Some of the interior lamps do not illuminate normally. :
Refer to Inspection Procedure K-2 "The front dome
lamp, rear dome lamp or trunk lamp do not illuminate
or go out normally P.54B-366."
STEP 2. Check the adjustment function.
Q: Has a setting other than "No auto-shutoff" been
selected for the interior lamp automatic shutdown
function by the adjustment function?
YES : Go to Step 3.
NO : Set the interior lamp automatic shutdown function to
another setting other than "No auto-shutoff".

SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-393
STEP 5. Check the input signal (by using the pulse check
mode of the monitor).
Check the following switches and input signals:
Door switches
Interior lamp loaded signal
(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 any door switch, interior lamp or the trunk lid
latch is operated, does diagnostic tool MB991958
sound?
Buzzer of diagnostic tool MB991958 sounds normally. :
Replace the ETACS-ECU. Verify that the dome lamp
illuminates normally.
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
P.54B-440."
When one of the interior lamps is illuminated,
diagnostic tool MB991958 does not sound : Refer to
Inspection Procedure N-9 "ETACS-ECU does not
receive any interior lamp loaded signal P.54B-474." ITEM NAME CONDITION
interior lamp loaded
signalTurn on one of the interior lamps
door switch Open or close one of the doors

INPUT SIGNAL PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-469
INSPECTION PROCEDURE N-7: ETACS-ECU does not receive any signal from the trunk lid latch
assembly.
.
CIRCUIT OPERATION
The ETACS-ECU operates the trunk lamp according
to signal from the trunk lid latch assembly.
.
TECHNICAL DESCRIPTION (COMMENT)
The trunk lid latch assembly input signal is used to
operate the trunk lamp. If the signal fails, this func-
tion will not work normally.
.
TROUBLESHOOTING HINTS
Refer to circuit diagrams GROUP-90
Refer to configuration diagrams GROUP-80
The trunk lid latch assembly may be defective
The ETACS-ECU may be defective
The wiring harness or connectors may have
loose, corroded, or damaged terminals, or termi-
nals pushed back in the connector

INPUT SIGNAL PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-470
DIAGNOSIS
.
Required Special Tool:
MB991223: Harness Set
STEP 1. Check trunk lid latch assembly connector F-05 for
loose, corroded or damaged terminals, or terminals
pushed back in the connector.
Q: Is trunk lid latch assembly connector F-05 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. If the functions described in "CIRCUIT
OPERATION" work normally, the input signal from the
trunk lid latch assembly should be normal.
STEP 2. Check the trunk lid latch assembly.
Remove the trunk lid latch assembly. Refer to GROUP 42,
Trunk lid, Trunk lid latch inspection P.42-65.
Q: Is the trunk lid latch assembly in good condition?
YES : Go to Step 3.
NO : Replace the trunk lid latch assembly. The input signal
from the trunk lid latch assembly should be able to be
checked and the functions, which are described in the
"Technical Description (comment)," should work
normally.
STEP 3. Check ETACS-ECU connector C-217 for loose,
corroded or damaged terminals, or terminals pushed back
in the connector.
Q: Is ETACS-ECU connector C-217 in good condition?
YES : Go to Step 4.
NO : Repair or replace the damaged component(s). Refer
to GROUP 00E, Harness Connector Inspection
P.00E-2. If the functions described in "CIRCUIT
OPERATION" work normally, the input signal from the
trunk lid latch assembly should be normal.
LEVER POSITION TESTER
CONNECTIONSPECIFIED
CONDITION
ON (Latch open) 2
Ground Less than 2 ohms
OFF (Latch shut) 2
Ground Open circuit