Mitsubishi 380. Manual — part 39

SYMPTOM PROCEDURES

SIMPLIFIED WIRING SYSTEM (SWS)

54B-153

STEP 2. Check the input signal by using "DATA LIST"
menu of the SWS monitor.
Turn the ignition switch to the "ON" position before checking
input signals from the ignition switch (IG1).
(1) Operate the diagnostic tool MB991958 according to the

procedure below to display "ETACS ECU."
a. Select "Interactive Diagnosis."
b. Select "System Select."
c. Select "SWS."
d. Select "SWS MONITOR."
e. Select "Data List."
f.

Select "ETACS ECU."

(2) Check that normal conditions are displayed for the items

described in the table below.

Q: Does the diagnostic tool MB991958 display "IG SW

(IG1)" as normal condition?
YES : Go to Step 3.
NO : Refer to Inspection Procedure M-2 "ETACS-ECU

does not receive any signal from the ignition switch
(IG1)

P.54B-408

."

STEP 3. Check power window relay connector C-203 for
loose, corroded or damaged terminals, or terminals
pushed back in the connector.

Q: Is power window relay connector C-203 in good

condition?
YES : Go to Step 4.
NO : Repair or replace the damaged component(s). Refer

to GROUP 00E, Harness Connector Inspection

P.00E-2

. The power windows function should now

work normally.

ITEM NO.

ITEM NAME

NORMAL CONDITION

ITEM 30

IG SW (IG1)

ON

00DB076A

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

AC302210

COLUMN SWITCH
CONNECTOR

COLUMN SWITCH
CONNECTOR AT
HARNESS SIDE

MB991812

AB

SYMPTOM PROCEDURES

SIMPLIFIED WIRING SYSTEM (SWS)

54B-154

STEP 4. Check the power window relay.

Q: Is the power window relay normal?

YES : Go to Step 5.
NO : Replace the power window relay. Verify that the

power windows work normally.

STEP 5. Check the battery power supply circuit to the
power window relay. Measure the voltage at power window
relay connector C-203.
(1) Disconnect power window relay connector C-203 and

measure the voltage available at the junction block side of
the connector.

(2) Measure the voltage between terminal 5 and ground.

• The voltage should measure approximately 12 volts

(battery positive voltage).

Q: Is the measured voltage approximately 12 volts (battery

positive voltage)?
YES : Go to Step 7.
NO : Go to Step 6.

BATTERY
CONNECTION

TESTER
CONNECTION

SPECIFIED
CONDITION

Not applied

4

− 5

Open circuit

• Connect terminal 1

to the positive
battery terminal

• Connect terminal 3

to the negative
battery terminal

4

− 5

Less than 2
ohms

AC401493

1

3

4

5

1 2

4
5

3

AB

1

2

3

4
5

AC201553

CONNECTOR: C-203
(JUNCTION BLOCK SIDE)

AE

SYMPTOM PROCEDURES

SIMPLIFIED WIRING SYSTEM (SWS)

54B-155

STEP 6. Check the wiring harness between power window
relay connector C-203 (terminal 5) and fusible link (5).

NOTE: Also check junction block connector C-212 for loose,
corroded or damaged terminals, or terminals pushed back in
the connectors. If junction block connector C-212 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 power window relay

connector C-203 (terminal 5) and fusible link (5) 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. The power
windows function should now work normally.

AC305015

FUSIBLE LINK No.5

AC

16DB330A

JUNCTION BLOCK SIDE

C-203

C-212

HARNESS SIDE

CONNECTORS: C-203,C-212

SYMPTOM PROCEDURES

SIMPLIFIED WIRING SYSTEM (SWS)

54B-156

STEP 7. Check the ground circuit to the power window
relay. Measure the resistance at power window relay
connector C-203.
(1) Disconnect power window relay connector C-203 and

measure the resistance available at the junction block side
of the connector.

(2) Measure the resistance value between terminal 3 and

ground.

• The resistance should be 2 ohms or less.

Q: Is the measured resistance 2 ohms or less?

YES : Go to Step 9.
NO : Go to Step 8.

STEP 8. Check the wiring harness between power window
relay connector C-203 (terminal 3) and ground.

NOTE: Also check junction block connector C-211 for loose,
corroded or damaged terminals, or terminals pushed back in
the connector. If junction block connector C-211 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 power window relay

connector C-203 (terminal 3) 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. The power
windows function should now work normally.

AC209364FU

CONNECTOR C-203
(JUNCTION BLOCK SIDE)

16DB331A

3

4
5

1

2

JUNCTION BLOCK SIDE

C-203

HARNESS SIDE

C-211

CONNECTORS: C-203,C-211