Mitsubishi 380. Manual - part 113

INPUT SIGNAL PROCEDURES

SIMPLIFIED WIRING SYSTEM (SWS)

54B-449

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 connector as described in GROUP 00E, Harness 
Connector Inspection 

P.00E-2

.

Q: Is the wiring harness between door lock key cylinder 

switch connector E-14 (terminals 2) and ground in good 
condition?
YES : No action is necessary and testing is complete.
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. If the 
systems described in "CIRCUIT OPERATION" work 
normally, the input signal from the door lock key 
cylinder switch should be normal.

STEP 5. 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 6.
NO :  Repair or replace the damaged component(s). Refer 

to GROUP 00E, Harness Connector Inspection 

P.00E-2

. If the systems described in "CIRCUIT 

OPERATION" work normally, the input signal from the 
door lock key cylinder switch should be normal.

16DB310A

CONNECTOR: C-12

16DB307A

CONNECTOR: C-217

HARNESS SIDE

25

26

27

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29

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24

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42

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44

JUNCTION BLOCK

(REAR VIEW)

INPUT SIGNAL PROCEDURES

SIMPLIFIED WIRING SYSTEM (SWS)

54B-450

STEP 6. Check the wiring harness between door lock key 
cylinder switch connector E-14 (terminals 1 and 3) and 
ETACS-ECU connector C-217 (terminals 25 and 42).

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 connector as described in GROUP 00E, Harness 
Connector Inspection 

P.00E-2

.

Q: Is the wiring harness between door lock key cylinder 

switch connector E-14 (terminals 1 and 3) and 
ETACS-ECU connector C-217 (terminals 25 and 42) in 
good condition?
YES : Replace the ETACS-ECU. If the systems described in 

"CIRCUIT OPERATION" work normally, the input 
signal from the door lock key cylinder switch should 
be normal.

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. If the 
systems described in "CIRCUIT OPERATION" work 
normally, the input signal from the door lock key 
cylinder switch should be normal.

16DB307A

CONNECTOR: C-217

HARNESS SIDE

25

26

27

28

29

21

22

23

24

30

31

32

33

34

35

36

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42

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44

JUNCTION BLOCK

(REAR VIEW)

16DB465A

E-14 (B)

HARNESS SIDE

CONNECTOR: E-14

16DB310A

CONNECTOR: C-12

INPUT SIGNAL PROCEDURES

SIMPLIFIED WIRING SYSTEM (SWS)

54B-451

INSPECTION PROCEDURE N-5: ETACS-ECU does not receive any signal from the front door lock 
actuator.

.

CIRCUIT OPERATION

The ETACS-ECU operates the following functions or 
systems according to signal from the front door lock 
actuator:

• Central door locking system

• Keyless entry system

• Dome lamp <front door lock actuator (RH)>

.

TECHNICAL DESCRIPTION (COMMENT)

If the signal is not normal, the functions or systems 
described in "CIRCUIT OPERATION" do not work 
normally.

.

TROUBLESHOOTING HINTS

• Refer to circuit diagrams GROUP-

90

• Refer to configuration diagrams GROUP-

80

• The front 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

16DB322A

CONNECTOR:C-26

16DB310A

CONNECTOR: C-12

16DB307A

CONNECTOR: C-217

HARNESS SIDE

25

26

27

28

29

21

22

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31

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44

JUNCTION BLOCK

(REAR VIEW)

16DB320A

CONNECTOR: E-15

E-15 (B)

HARNESS SIDE

16DB308A

E-05 (B)

HARNESS SIDE

CONNECTOR: E-05

INPUT SIGNAL PROCEDURES

SIMPLIFIED WIRING SYSTEM (SWS)

54B-452

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 the input signal (by using the pulse check 
mode of the monitor).
Check the input signals from the front door lock actuators.

CAUTION

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 diagnostic tool MB991958. Refer to "How to 

connect SWS monitor 

P.54B-13

."

(2) 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."

(3) Check that diagnostic tool MB991958 sounds.

Q: When the front door lock actuators are operated, does 

the diagnostic tool MB991958 sound?
When the front door lock actuator (RH) is operated, the 
diagnostic tool MB991958 does not sound. : Go to Step 

2.

When the front door lock actuator (LH) is operated, the 
diagnostic tool MB991958 does not sound. : Go to Step 

8.

STEP 2. Check front door lock actuator (RH) connector 
E-15 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 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 
front door lock actuator (RH) should be normal.

00DB076A

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

16DB308A

E-05 (B)

HARNESS SIDE

CONNECTOR: E-05