Mitsubishi 380. Manual — part 33

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.

16DB322A

CONNECTOR:C-26

16DB310A

CONNECTOR: C-12

16DB305A

C-219

C-217

CONNECTORS: C-217, C-219

JUNCTION BLOCK

(REAR VIEW)

16DB314A

CONNECTOR: D-36

16DB315A

CONNECTOR: D-19

16DB316A

CONNECTORS: E-15, E-18

E-15 (B)

E-18 (B)

16DB317A

CONNECOTRS: E-05, E-08

E-05 (B)

E-08 (B)

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.

16DB308A

E-05 (B)

HARNESS SIDE

CONNECTOR: E-05

SYMPTOM PROCEDURES

SIMPLIFIED WIRING SYSTEM (SWS)

54B-131

STEP 3. Check the front door lock actuator (RH).
Remove the front door lock actuator (RH). The illustration
shows when the door lock actuator is viewed from inside the
door. Refer to GROUP 42

− Door Handle and Latch

P.42-46

.

Q: Does the front door lock actuator (RH) work normally?

YES : Go to Step 4.
NO : Replace the front door lock actuator (RH). Verify that

all the doors can be locked and unlocked normally.

STEP 4. Check ETACS-ECU connectors C-217 and C-219
for loose, corroded or damaged terminals, or terminals
pushed back in the connector.
Q: Are ETACS-ECU connectors C-217 and C-219 in good

condition?
YES : Go to Step 5.
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.

LEVER
POSITION

BATTERY
CONNECTION

LEVER
OPERATION

At the "LOCK"
position

• Connect terminal 4

to the negative
battery terminal

• Connect terminal 6

to the positive
battery terminal

The 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 terminal

The lever moves
from the "UNLOCK"
position to the
"LOCK" position.

1 2 3

4 5 6

16DB318A

VIEW A

A

LOCK

UNLOCK

LEVER

16DB319A

CONNECTORS: C-217, C-219

JUNCTION BLOCK
(REAR VIEW)

C-217

C-219

HARNESS SIDE

C-217

C-219

JUNCTION BLOCK SIDE

21

22

23

24

25

26

27

28

29
383736353433 32 31 30

39

40

41

42

43

44

SYMPTOM PROCEDURES

SIMPLIFIED WIRING SYSTEM (SWS)

54B-132

STEP 5. Check the wiring harness between ETACS-ECU
connector C-217 (terminal 22) and front door lock actuator
(RH) connector E-05 (terminal 6).

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 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). Verify
that the central door locking system works normally.

16DB307A

CONNECTOR: C-217

HARNESS SIDE

25

26

27

28

29

21

22

23

24

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

JUNCTION BLOCK

(REAR VIEW)

16DB308A

E-05 (B)

HARNESS SIDE

CONNECTOR: E-05

16DB310A

CONNECTOR: C-12