2005 MITSUBISHI 380 Workshop Manual

SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-137
STEP 12. Check the rear door lock actuator (LH).
Remove the rear door lock actuator (LH). The illustration shows
when the door lock actuator is viewed from outside the door.
Refer to GROUP 42
Door Handle and Latch P.42-46.
Q: Does the rear door lock actuator (LH) work normally?
YES : Go to Step 13.
NO : Replace the rear door lock actuator (LH). Verify that
all the doors can be locked and unlocked normally.
STEP 13. 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 14.
NO : Repair or replace the damaged component(s). Refer
to GROUP 00E, Harness Connector Inspection
P.00E-2. Verify that all the doors can be locked and
unlocked normally. LEVER
POSITIONBATTERY
CONNECTIONLEVER
OPERATION
At the "LOCK"
position
Connect terminal 6
to the negative
battery terminal
Connect terminal 4
to the positive
battery terminalThe lever moves
from the "LOCK"
position to the
"UNLOCK"
position.
At the
"UNLOCK"
position
Connect terminal 4
to the negative
battery terminal
Connect terminal 6
to the positive
battery terminalThe lever moves
from the
"UNLOCK" position
to the "LOCK"
position.

SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-138
STEP 14. Check the wiring harness between ETACS-ECU
connector C-219 (terminals 12 and 13) and rear door lock
actuator (LH) connector E-18 (terminals 4 and 6).
NOTE: Also check intermediate connector D-19 and junction
block connector C-204 for loose, corroded, or damaged termi-
nals, or terminals pushed back in the connector. If intermediate
connector D-19 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 ETACS-ECU connector
C-219 (terminals 12 and 13) and rear door lock actuator
(LH) connector E-18 (terminals 4 and 6) 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 the wiring harness as necessary. Verify that all
the doors can be locked and unlocked.

SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-139
STEP 15. Check rear door lock actuator (RH) connector
E-08 for loose, corroded or damaged terminals, or
terminals pushed back in the connector.
Q: Is rear door lock actuator (RH) connector E-08 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. Verify that all the doors can be locked and
unlocked normally.
STEP 16. Check the rear door lock actuator (RH).
Remove the rear door lock actuator (RH). The illustration
shows when the door lock actuator is viewed from outside the
door. Refer to GROUP 42
Door Handle and Latch P.42-46.
Q: Does the rear door lock actuator (RH) work normally?
YES : Go to Step 17.
NO : Replace the rear door lock actuator (RH). Verify that
all the doors can be locked and unlocked normally.
LEVER
POSITIONBATTERY
CONNECTIONLEVER
OPERATION
At the "LOCK"
position
Connect terminal
4 to the negative
battery terminal
Connect terminal
6 to the positive
battery terminalThe lever moves
from the "LOCK"
position to the
"UNLOCK"
position.
At the
"UNLOCK"
position
Connect terminal
6 to the negative
battery terminal
Connect terminal
4 to the positive
battery terminalThe lever moves
from the
"UNLOCK" position
to the "LOCK"
position.

SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-140
STEP 17. 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 18.
NO : Repair or replace the damaged component(s). Refer
to GROUP 00E, Harness Connector Inspection
P.00E-2. Verify that all the doors can be locked and
unlocked normally.
STEP 18. Check the wiring harness between ETACS-ECU
connector C-219 (terminals 12 and 13) and rear door lock
actuator (RH) connector E-08 (terminals 6 and 4).

SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-141
NOTE: Also check junction block connector C-204 and inter-
mediate connectors D-36 for loose, corroded, or damaged ter-
minals, or terminals pushed back in the connector. If junction
block connector C-204 or intermediate connector D-36 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 (terminals 12 and 13) and rear door lock actuator
(RH) connector E-08 (terminals 6 and 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 the wiring harness as necessary. Verify that all
the doors can be locked and unlocked normally.

SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-142
INSPECTION PROCEDURE C-3: Central Door Locking System: All the Doors do not Lock or Unlock
with just the Door Lock Switch Operation.
.
TECHNICAL DESCRIPTION (COMMENT)
The door lock switch (incorporated in the power win-
dow main switch and front power window sub switch)
or the ETACS-ECU may be defective.
.
TROUBLESHOOTING HINTS
Refer to circuit diagrams GROUP-90
Refer to configuration diagrams GROUP-80
Trouble in input signal system
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 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
Check the input signal (by using the pulse check mode of
the monitor).
Check the input signals from the door lock switch (incorporated
in the power window main switch and front power window sub
switch):
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 the special tool. Refer to "How to connect SWS
monitor P.54B-13."
(2) When the driver's or the front passenger's door lock switch
is moved from "LOCK" to "UNLOCK" and vice versa, check
if diagnostic tool MB991958 sounds or not.
(3) 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."
Q: Does diagnostic tool MB991958 sound when the driver's
or the front passenger's door lock switch is moved from
"LOCK" to "UNLOCK" and vice versa?
YES : Replace the ETACS-ECU. Check that all the doors
should be locked and unlocked by the door lock
switch.
NO : Refer to Inspection Procedure N-6 "ETACS-ECU
does not receive any signal from the door lock switch
(incorporated in the power window main switch and
front power window sub switch) P.54B-460."

SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-143
INSPECTION PROCEDURE C-4: Central Door Locking System: All the Doors do not Lock or Unlock
with just the Door Lock Key Cylinder Key Operation.
.
TECHNICAL DESCRIPTION (COMMENT)
The door lock key cylinder switch or the ETACS-ECU
may be defective.
.
TROUBLESHOOTING HINTS
Refer to circuit diagrams GROUP-90
Refer to configuration diagrams GROUP-80
Trouble in input signal system
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 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
Check the input signal (by using the pulse check mode of
the monitor).
Check the input signals from the door lock key cylinder switch.
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 the special tool. Refer to "How to connect SWS
monitor P.54B-13."
(2) When the doors are locked and unlocked by using the
driver's door lock key cylinder, check that diagnostic tool
MB991958 sounds.
(3) 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."
Q: When the doors are locked and unlocked by using the
driver's door lock key cylinder, does diagnostic tool
MB991958 sound?
YES : Replace the ETACS-ECU. Check that all the doors
should be locked and unlocked by using driver door
lock key cylinder switch.
NO : Refer to Inspection Procedure N-4 "ETACS-ECU
does not receive any signal from the door lock key
cylinder switch P.54B-446."

SYMPTOM PROCEDURES
SIMPLIFIED WIRING SYSTEM (SWS)54B-144
INSPECTION PROCEDURE C-5: Central Door Locking System: Forgotten Key Prevention Function
does not Work Normally.
NOTE: This troubleshooting procedure requires use
of diagnostic tool MB991958 and SWS monitor kit
MB991813. For details on how to use the SWS mon-
itor, refer to "How to connect SWS monitor
P.54B-13."
.
CIRCUIT OPERATION
The ETACS-ECU operates the forgotten key preven-
tion function according to the following switches:
Key reminder switch: OFF
Front door switch: ON
Front door lock actuator switch: being turned on
The ETACS-ECU operates the forgotten key preven-
tion function under the following conditions:
Ignition key: inserted into the ignition key cylinder
Front door: open
Front door lock: being locked
.
TECHNICAL DESCRIPTION (COMMENT)
If the function does not work normally, the input cir-
cuit system from the switches or the ETACS-ECU
may be defective (refer to "CIRCUIT OPERATION").
.
TROUBLESHOOTING HINTS
Refer to circuit diagrams GROUP-90
Refer to configuration diagrams GROUP-80
Trouble in input signal system
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