trunk MITSUBISHI 380 2005 User Guide

SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-207
STEP 3. Check trunk lid latch assembly connector F-05
and ETACS-ECU connector C-217 for loose, corroded or
damaged terminals, or terminals pushed back in the
connector.
Q: Is trunk lid latch assembly connector F-05 and
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. Check that the headlamps illuminate
normally.
STEP 4. 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: Does the windshield washer motor operate normally?
YES : Go to Step 5.
NO : Replace the trunk lid latch assembly. Verify that the
windshield washer works normally.
LEVER POSITION TESTER
CONNECTIONSPECIFIED
CONDITION
ON (Latch open) 2
Ground Less than 2 ohms
OFF (Latch shut) 2
Ground Open circuit

SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-208
STEP 5. Check the wiring harness between trunk lid latch
assembly connector F-05 (terminal 1) and ETACS-ECU
connector C-217.
NOTE: Also check intermediate connector C-28 for loose, cor-
roded, or damaged terminals, or terminals pushed back in the
connector. If intermediate connector C-28 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 lid latch assembly
connector F-05 (terminal 1) and ETACS-ECU connector
C-217 in good condition?
YES : Replace the ETACS-ECU. All the doors can be locked
or unlocked by means of the transmitter.
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. The system
should communicate with the sunroof-ECU normally.

SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-366
INSPECTION PROCEDURE K-2: Interior Light: The front dome lamp, rear dome lamp or trunk lamp do
not illuminate or go out normally.
.
CIRCUIT OPERATION
The ETACS-ECU operates the dome lamp according
to the following signals:
Ignition switch (IG1): ON or OFF
Key reminder switch: ON or OFF
Door switches: ON or OFF
Trunk lid latch assembly: ON or OFF
Driver’s door lock actuator switch: LOCK or
UNLOCK
.

SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-367
TECHNICAL DESCRIPTION (COMMENT)
Is the dome lamp does not flash normally, a
burned-out dome lamp bulb, the input circuits from
the switches described in "CIRCUIT OPERATION",
the power supply line to the switches or the
ETACS-ECU may be defective.
.
TROUBLESHOOTING HINTS
Refer to circuit diagrams GROUP-90
Refer to configuration diagrams GROUP-80
The front dome lamp bulb may be defective
The rear dome lamp bulb may be defective
The trunk lamp bulb may be defective
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-368
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
STEP 1. Check which of the front dome lamp, rear dome
lamp or trunk lamp do not illuminate normally.
Q: Which of the front dome lamp, rear dome lamp or trunk
lamp fail to illuminate normally?
Front dome lamp and rear dome lamp : Go to Step 2.
Front dome lamp : Go to Step 4.
Rear dome lamp : Go to Step 9.
Tru n k l am p : Go to Step 14.
STEP 2. Check map lamp assembly connector D-02
, overhead console assembly connector
D-03 and ETACS-ECU connector C-219 for
loose, corroded or damaged terminals, or terminals
pushed back in the connector.
Q: Is map lamp assembly connector D-02 sunroof>, overhead console assembly connector D-03
and ETACS-ECU connector C-219 in
good condition?
YES : Go to Step 3.
NO : Repair or replace the damaged component(s). Refer
to GROUP 00E, Harness Connector Inspection
P.00E-2. Check that the front dome lamp and rear
dome lamp illuminates normally.

SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-373
STEP 13. Check the wiring harness between rear dome
lamp connector D-07 (terminals 1 and 2) and ETACS-ECU
connector C-219 (terminals 6 and 5).
Q: Is the wiring harness between rear dome lamp
connector D-07 (terminals 1 and 2) and ETACS-ECU
connector C-219 (terminals 6 and 5) in good condition?
YES : Replace the rear dome lamp. Check that the rear
dome 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 rear dome lamp illuminates normally.
STEP 14. Check the input signal (by using the pulse check
mode of the monitor).
Check the input signals from the trunk lid latch assembly.
Check whether diagnostic tool MB991958 sounds or not
when the trunk is opened.
(1) Operate diagnostic tool MB991958 according to the
procedure below to display "Pulse checking."
a. Select "Interactive Diagnosis."
b. Select "System Select."
c. Select "SWS."
d. Select "Pulse Checking."
Q: Does diagnostic tool MB991958 sound when the trunk is
opened and closed?
YES : Go to Step 15.
NO : Refer to Inspection Procedure N-7 "ETACS-ECU
does not receive any signal from the trunk lid latch
assembly P.54B-469."

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