2005 MITSUBISHI 380 door lock

SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-122
INSPECTION PROCEDURE C-1: Central Door Locking System: The Central Door Locking System
does not Work at all.
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."
.
CIRCUIT OPERATION
The ETACS-ECU controls the central door lock
system, locking or unlocking all the doors by acti-
vating the central door lock relay (built into the
ETACS-ECU). The ETACS-ECU uses inputs from
the following components:
Front door lock actuator
Front door lock key cylinder switch
Door lock switch, which is incorporated in the
power window main switch or front power win-
dow sub switch
.
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-124
STEP 2. Check ETACS-ECU connector C-219 for loose,
corroded or damaged terminals, or terminals pushed back
in the connector.
Q: Is 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. Verify that the central door locking system
works normally.
STEP 3. Check the battery power supply circuit to the
ETACS-ECU. Measure the voltage at ETACS-ECU
connector C-219.
(1) Disconnect ETACS-ECU connector C-219 and measure the
voltage available at the junction block side of the connector.
(2) Measure the voltage between terminal 2 and ground.
The voltage should measure approximately 12 volts
(battery positive voltage)
Q: Is the measured voltage approximately 12 volts (battery
positive voltage)?
YES : Go to Step 5.
NO : Go to Step 4.

SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-125
STEP 4. Check the wiring harness between ETACS-ECU
connector C-219 (terminal 2) and fusible link (1).
NOTE: Also check junction block connector C-216 and inter-
mediate connector C-31 for loose, corroded, or damaged termi-
nals, or terminals pushed back in the connector. If junction
block connector C-216 or intermediate connector C-31 is dam-
aged, repair or replace the damaged component(s) as
described in GROUP 00E, Harness Connector Inspection
P.00E-2.
Q: Is the wiring harness between ETACS-ECU connector
C-219 (terminal 2) and fusible link (1) in good condition?
YES : No action is necessary and testing is complete.
NO : The wiring harness may be damaged or the connector
may have loose, corroded or damaged terminals, or
terminals pushed back in the connector. Repair the
wiring harness as necessary. Verify that the central
door locking system works normally.

SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-126
STEP 5. Check ETACS-ECU connectors C-217 and front
door lock actuator (RH) connector E-05 for loose, corroded
or damaged terminals, or terminals pushed back in the
connector.
Q: Are ETACS-ECU connectors C-217 and front door lock
actuator (RH) connector E-05 in good condition?
YES : Go to Step 6.
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 or replace the damaged component(s). Refer
to GROUP 00E, Harness Connector Inspection
P.00E-2. Verify that the central door locking system
works normally.
STEP 6. Check the wiring harness between ETACS-ECU
connector C-217 (terminal 22) and front door lock actuator
(RH) connector E-05 (terminal 6).

SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-127
NOTE: Also check intermediate connector C-12 for loose, cor-
roded, or damaged terminals, or terminals pushed back in the
connector. If intermediate connector C-12 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 ETACS-ECU connector
C-217 (terminal 22) and front door lock actuator (RH)
connector E-05 (terminal 6) in good condition?
YES : Go to Step 7.
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.
STEP 7. Check the wiring harness between ETACS-ECU
connector C-219 (terminal 12) and front door lock actuator
(RH) connector E-05 (terminal 4).

SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-128
NOTE: Also check intermediate connector C-12 and junction
block connector C-211 for loose, corroded, or damaged termi-
nals, or terminals pushed back in the connector. If intermediate
connector C-12 or junction block connector C-211 are dam-
aged, repair or replace the damaged component(s) as
described in GROUP 00E, Harness Connector Inspection
P.00E-2.
Q: Is the wiring harness between ETACS-ECU connector
C-219 (terminal 12) and front door lock actuator (RH)
connector E-05 (terminal 4) in good condition?
YES : Replace the ETACS-ECU. Verify that all the doors
can be locked and unlocked 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 or replace the damaged component(s). Verify
that the central door locking system works normally.

SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-129
INSPECTION PROCEDURE C-2: Central Door Locking System: Some Doors do not Lock or Unlock.
.
CIRCUIT OPERATION
The ETACS-ECU operates the central door lock
system according to the following signals:
Front door lock actuator switch
Door lock key cylinder switch
Door lock switch, which is incorporated in the
power window main switch or front power win-
dow sub switch
The ETACS-ECU locks or unlocks all the doors
(except liftgate and glass hatch lock) by operating
the central door lock relay (incorporated in the
ECU) in response to input signals.

SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-130
.
TECHNICAL DESCRIPTION (COMMENT)
The wiring harness between the door lock actuator or
the ETACS-ECU and the door lock actuator may be
defective.
.
TROUBLESHOOTING HINTS
Refer to circuit diagrams GROUP-90
Refer to configuration diagrams GROUP-80
The front door lock actuator or rear door lock
actuator 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
DIAGNOSIS
Required Special Tool:
MB991223: Harness Set
STEP 1. Check which door lock is defective.
Q: Which of the door locks is defective?
Driver's door : Go to Step 2.
Front passenger's door : Go to Step 7.
Rear door (LH) : Go to Step 11.
Rear door (RH) : Go to Step 15.
STEP 2. Check front door lock actuator (RH) connector
E-05 for loose, corroded or damaged terminals, or
terminals pushed back in the connector.
Q: Is front door lock actuator (RH) connector E-05 in good
condition?
YES : Go to Step 3.
NO : Repair or check the connector. Refer to GROUP 00E,
Harness Connector Inspection P.00E-2. Verify that all
the doors can be locked and unlocked normally.