Mitsubishi 380. Manual — part 61

SYMPTOM PROCEDURES

SIMPLIFIED WIRING SYSTEM (SWS)

54B-241

TECHNICAL DESCRIPTION (COMMENT)

If the windshield wipers do not stop at predetermined
park position, the windshield wiper motor or the
front-ECU may be defective.

.

TROUBLESHOOTING HINTS

• Refer to circuit diagrams GROUP-

90

• Refer to configuration diagrams GROUP-

80

• The wiring harness or connectors may have

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

• The windshield wiper motor may be defective

• The front-ECU may be defective

DIAGNOSIS

Required Special Tool:

• MB991223: Harness Set

STEP1. Check windshield wiper motor connector A-03 for
loose, corroded or damaged terminals, or terminals
pushed back in the connector.

Q: Is windshield wiper motor connector A-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

. Verify that the windshield wiper works

normally.

16DB425A

A-03 (B)

CONNECTOR: A-03

SYMPTOM PROCEDURES

SIMPLIFIED WIRING SYSTEM (SWS)

54B-242

STEP 2. Check the windshield wiper motor.
(1) Disconnect windshield wiper motor connector A-03.

(2) Connect the vehicle battery to the windshield wiper motor

connector as shown, and operate the windshield wiper at
low speed. While the windshield wiper is working,
disconnect the battery at positions other than the
predetermined park position to stop the windshield wiper
motor.

(3) When the battery is connected as shown, the motor should

run at low speed, and then stop at the predetermined park
position.

Q: Does the windshield wiper motor operate normally?

YES : Go to Step 3.
NO : Replace the windshield wiper motor. The windshield

wiper should now stop at the predetermined park
position.

16DB425A

A-03 (B)

CONNECTOR: A-03

16DB428A

STOP POSITION CHECK

(A) LOW SPEED

(B) AUTOMATICAL STOP

SYMPTOM PROCEDURES

SIMPLIFIED WIRING SYSTEM (SWS)

54B-243

STEP 3. Check the ignition switch (ACC) circuit to the
windshield wiper motor. Measure the voltage at windshield
wiper motor connector A-03.
(1) Disconnect windshield wiper motor connector A-03 and

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

(2) Turn the ignition switch to the "ACC" position.

(3) Measure the voltage between terminal 3 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 5.
NO : Go to Step 4.

STEP 4. Check the wiring harness between windshield
wiper motor connector A-03 (terminal 3) and the ignition
switch (ACC).

16DB425A

A-03 (B)

CONNECTOR: A-03

16DB429A

CONNECTOR A-03
(HARNESS SIDE)

16DB425A

A-03 (B)

CONNECTOR: A-03

SYMPTOM PROCEDURES

SIMPLIFIED WIRING SYSTEM (SWS)

54B-244

NOTE: Also check intermediate connector C-29 for loose, cor-
roded, or damaged terminals, or terminals pushed back in the
connector. If intermediate connector C-29 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 windshield wiper motor

connector A-03 (terminal 3) and the ignition switch
(ACC) 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. Verify that
the windshield wiper works normally.

STEP 5. Check front-ECU connector A-12X for loose,
corroded or damaged terminals, or terminals pushed back
in the connector.
Q: Is front-ECU connector A-12X 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

. The windshield wiper should stop at the

predetermined park position.

16DB353A

CONNECTOR: C-29

AC305977

CONNCTOR: A-12X

AI

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RELAY BOX SIDE