Mitsubishi 380. Manual - part 42

SYMPTOM PROCEDURES

SIMPLIFIED WIRING SYSTEM (SWS)

54B-165

DIAGNOSIS

Required Special Tool:

• MB991223: Harness Set

STEP 1. Check power window main switch connector E-04 
and front power window regulator motor (RH) connector 
E-03 for loose, corroded or damaged terminals, or 
terminals pushed back in the connector.
Q: Are power window main switch connector E-04 and 

front power window regulator motor (RH) connector 
E-03 in good condition?
YES : Go to Step 2.
NO :  Repair or replace the damaged component(s). Refer 

to GROUP 00E, Harness Connector Inspection 

P.00E-2

. When the power window main switch is 

operated, the front power window (RH) should lower 
or raise normally.

STEP 2. Check the power window main switch.
(1) Remove the power window main switch. Refer to GROUP 

42, Door, Door Glass and Regulator 

P.42-39

.

(2) Check continuity while power window main switch is moved 

to "UP" and "DOWN" position.

Q: Is the power window main switch normal?

YES : Go to Step 3.
NO :  Replace the power window main switch. When the 

power window main switch is operated, the front 
power window (RH) should lower or raise normally.

16DB337A

 

CONNECTORS:E-04,E-03

3

9

4

12

14

6

13

5

1110

8

2

7

1

HARNESS SIDE

E-04

E-03

E-04

E-03(GR)

HARNESS SIDE

FRONT (RH) 
SWITCH 
POSITION

TESTER 
CONNECTION

SPECIFIED 
CONDITION

UP

12 

− 10, 14 − 2

Less than 2 ohms

OFF

12 

− 14, 12 − 2,    

14 

− 2

DOWN

12 

− 2, 14 − 10

16DB338A

12

7

1

8

2

10

9

3

11

13

5

4

14

6

SYMPTOM PROCEDURES

SIMPLIFIED WIRING SYSTEM (SWS)

54B-166

STEP 3. Check the front power window regulator motor 
(RH).
(1) Remove the front power window regulator motor (RH). 

Refer to GROUP 42, Door, Door Glass and Regulator 

P.42-39

.

(2) Connect a battery to the motor terminal, and check that the 

motor runs freely.

Q: Is the front power window regulator motor (RH) normal?

YES : Go to Step 4.
NO :  Replace the front power window regulator motor 

(RH). When the power window main switch is 
operated, the front power window (RH) should lower 
or raise normally.

STEP 4. Check the wiring harness between power window 
main switch connector E-04 (terminals 12 and 14) and front 
power window regulator motor (RH) connector E-03 
(terminals 2 and 1).
Q: Is the wiring harness between power window main 

switch connector E-04 (terminals 12 and 14) and front 
power window regulator motor (RH) connector E-03 
(terminals 2 and 1) 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. When the 
power window main switch is operated, the front 
power window (RH) should lower or raise normally.

BATTERY CONNECTION

SLIDER POSITION

• Connect terminal 1 to the 

negative battery terminal

• Connect terminal 2 to the 

positive battery terminal

UP

• Connect terminal 2 to the 

negative battery terminal

• Connect terminal 1 to the 

positive battery terminal

DOWN

1 2

AC204901AB

16DB337A

 

CONNECTORS:E-04,E-03

3

9

4

12

14

6

13

5

1110

8

2

7

1

HARNESS SIDE

E-04

E-03

E-04

E-03(GR)

HARNESS SIDE

SYMPTOM PROCEDURES

SIMPLIFIED WIRING SYSTEM (SWS)

54B-167

INSPECTION PROCEDURE D-4: Power Window: Power windows do not work normally by operating 
the front passenger's or rear passenger's sub switches.

.

16DB339A

C-26

C-13

CONNECTORS: C-26,C-13

16DB340A

CONNECTORS: C-12,C-28

C-12

C-28

16DB342A

E-12

E-13 (GR)

E-17

E-16 (GR)

CONNECTORS: E-13, E-12, E-17, E-16

16DB343A

E-04

E-06

E-07

CONNECTORS: E-04, E-07, E-06

AC400532

AB

CONNECTOR: D-19

AC400530

CONNECTOR: D-36

AC

SYMPTOM PROCEDURES

SIMPLIFIED WIRING SYSTEM (SWS)

54B-168

CIRCUIT OPERATION

power window regulator motors raise and lower the 
door windows when the front passenger's or rear 
passenger's sub switch is moved to "UP" or "DOWN" 
position.

.

TECHNICAL DESCRIPTION (COMMENT)

A power window sub switch or power window regula-
tor motor may be defective. Or, the power window 
lock switch (incorporated in the power window main 
switch in the driver’s door) may remain pressed in 
the "LOCK" position.

.

TROUBLESHOOTING HINTS

• Refer to circuit diagrams GROUP-

90

• Refer to configuration diagrams GROUP-

80

• The power window main switch may be defective

• The front power window sub switch may be 

defective

• The rear power window sub switches may be 

defective

• The front power window regulator motor (RH) 

may be defective

• The rear power window regulator motors may be 

defective

• The wiring harness or connectors may have 

loose, corroded, or damaged terminals, or termi-
nals pushed back in the connector

DIAGNOSIS

Required Special Tool:

• MB991223: Harness Set

STEP 1. 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 2.
NO :  Repair or replace the damaged component(s). Refer 

to GROUP 00E, Harness Connector Inspection 

P.00E-2

. When the front power window sub switch 

(LH) is operated, the front power window (LH) should 
raise and lower normally.

16DB332A

3

9

4

12

14

6

13

5

1110

8

2

7

1

HARNESS SIDE

CONNECTOR:E-04