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