Mitsubishi 380. Manual - part 116

INPUT SIGNAL PROCEDURES

SIMPLIFIED WIRING SYSTEM (SWS)

54B-461

DIAGNOSIS

Required Special Tool:

• 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 door lock switch (incorporated 
in the power window main switch and front power window sub 
switch).

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 door lock switch (incorporated in the power 

window main switch and front power window sub 
switch) is operated, does the diagnostic tool MB991958 
sound?
When the door lock switch (incorporated in the power 
window main switch) is operated, the diagnostic tool 
MB991958 does not sound. : Go to Step 2.
When the door lock switch (incorporated in the front 
power window sub switch) is operated, the diagnostic 
tool MB991958 does not sound. : Go to Step 8.

STEP 2. Check power window main switch connector E-04 
for loose, corroded or damaged terminals, or terminals 
pushed back in the connector. 
Q: Is power window main switch connector E-04 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 central door locking system works 

normally, input signal from the door lock switch 
(power window main switch) should be normal.

00DB076A

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

16DB332A

3

9

4

12

14

6

13

5

1110

8

2

7

1

HARNESS SIDE

CONNECTOR:E-04

INPUT SIGNAL PROCEDURES

SIMPLIFIED WIRING SYSTEM (SWS)

54B-462

STEP 3. Check the door lock switch (power window main 
switch).
Remove the power window main switch. Refer to GROUP 42, 
Door, Door Glass and Regulator 

P.42-39

. Then check continu-

ity between the switch terminals.

Q: Is the door lock switch (power window main switch) in 

good condition?
YES : Go to Step 4.
NO :  Replace the power window main switch. If the central 

door locking system works normally, input signal from 
the door lock switch (power window main switch) 
should be normal.

STEP 4. Check the ground circuit to the power window 
main switch. Measure the resistance at power window 
main switch connector E-04.
(1) Disconnect power window main switch connector E-04 and 

measure the resistance available at the wiring harness side 
of the connector.

(2) Measure the resistance value between terminal 2 and 

ground.

• The resistance should be 2 ohms or less.

Q: Is the measured resistance 2 ohms or less?

YES : Go to Step 6.
NO :  Go to Step 5.

SWITCH 
POSITION

TESTER 
CONNECTION

SPECIFIED 
CONDITION

LOCK

5 

− 2

Less than 2 ohms

OFF

5 

− 2, 13 − 2

Open circuit

UNLOCK

13 

− 2

Less than 2 ohms

5

4

6

13

3

2

1

14

12

11

10

9

8

7

AC006121

16DB332A

3

9

4

12

14

6

13

5

1110

8

2

7

1

HARNESS SIDE

CONNECTOR:E-04

3

9

4

12

14

6

13

5

1110

8

2

7

1

16DB467A

CONNECTOR  E-04

(HARNESS SIDE)

INPUT SIGNAL PROCEDURES

SIMPLIFIED WIRING SYSTEM (SWS)

54B-463

STEP 5. Check the wiring harness between power window 
main switch E-04 (terminal 2) and ground.

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 power window main 

switch connector E-04 (terminal 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 central 
door locking system works normally, input signal from 
the door lock switch (power window main switch) 
should be normal.

STEP 6. 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 7.
NO :  Repair or replace the damaged component(s). Refer 

to GROUP 00E, Harness Connector Inspection 

P.00E-2

. If the central door locking system works 

normally, input signal from the door lock switch 
(power window main switch) should be normal.

16DB332A

3

9

4

12

14

6

13

5

1110

8

2

7

1

HARNESS SIDE

CONNECTOR:E-04

16DB310A

CONNECTOR: C-12

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)

INPUT SIGNAL PROCEDURES

SIMPLIFIED WIRING SYSTEM (SWS)

54B-464

STEP 7. Check the wiring harness between power window 
main switch connector E-04 (terminals 5 and 13) and 
ETACS-ECU connector C-217 (terminals 33 and 34).

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 power window main 

switch connector E-04 (terminals 5 and 13) and 
ETACS-ECU connector C-217 (terminals 33 and 34) in 
good condition?
YES : Replace the ETACS-ECU. If the central door locking 

system works normally, input signal from the door lock 
switch (power window main 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 central 
door locking system works normally, input signal from 
the door lock switch (power window main 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

37

38

39

40

41

42

43

44

JUNCTION BLOCK

(REAR VIEW)

16DB332A

3

9

4

12

14

6

13

5

1110

8

2

7

1

HARNESS SIDE

CONNECTOR:E-04

16DB310A

CONNECTOR: C-12