Mitsubishi Galant. Manual — part 716

SWS DIAGNOSIS

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-259

Inspection Procedure N-15: Column switch: The windshield mist wiper switch, windshield
intermittent wiper switch, windshield low-speed wiper switch, windshield high-speed wiper switch or
windshield washer switch signal is not sent to the ETACS-ECU.

CIRCUIT OPERATION
The ETACS-ECU uses the input signal from the
column switch (windshield wiper and washer switch)
to operate various functions.

TECHNICAL DESCRIPTION (COMMENT)
The column switch (windshield wiper and washer
switch) input signal is used to operate the windshield
wiper and washer. If the signal fails, windshield wiper
and washer will not work normally.

TROUBLESHOOTING HINTS

•

Malfunction of the column switch (windshield
wiper and washer switch)

•

Malfunction of the ETACS-ECU

•

Damaged harness wires or connectors

DIAGNOSIS

Required Special Tools:

•

MB991223: Test Harness Set

STEP 1. Check the ignition switch positions.

Q: Does a diagnostic trouble code set when the ignition

switch is at any of the positions?
YES : Carry out the troubleshooting by referring to the

Diagnostic Trouble Code Chart. Refer to

P.54B-8

.

NO : Go to Step 2.

AC004263

Windshield Wiper and Windshield Washer Switch Input Circuit

SWS DIAGNOSIS

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-260

STEP 2. Check the windshield wiper and washer switch.

Q: Is the windshield wiper and washer switch in good

condition?
YES : Go to Step 3.
NO : Replace it. The input signal from the column switch

(windshield wiper and washer switch) should be able
to be checked and the windshield wiper and washer
should work normally.

STEP 3. Replacement of ECU
(1)Replace the column switch (turn-signal light and lighting

switch).

(2)The input signal from the column switch (windshield wiper

and washer switch) should be able to be checked and the
windshield wiper and washer should work normally.

Q: Is the input signal from the column switch (windshield

wiper and washer switch) input normally?
YES : There is no action to be taken.
NO : Replace the ETACS-ECU. The input signal from the

column switch (windshield wiper and washer switch)
should be able to be checked and the windshield
wiper and washer should work normally.

SWITCH
POSITION

TESTER
CONNECTION

SPECIFIED
CONDITION

OFF

−

No continuity

Windshield mist
wiper switch

22

−

32

Continuity

Windshield
intermittent wiper
switch

22

−

31

Continuity

Windshield
low-speed wiper
switch

22

−

30

Continuity

Windshield
high-speed wiper
switch

21

−

23

Continuity

Windshield
washer switch

22

−

23

Continuity

AC003178

UPPER SIDE

AB

SWS DIAGNOSIS

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-261

Inspection Procedure N-16: The windshield intermittent wiper interval adjusting knob signal is not
sent to the ETACS-ECU.

CIRCUIT OPERATION
The ETACS-ECU calculates the windshield
intermittent wiper interval according to the resistance
of the windshield intermittent wiper interval adjusting
knob, which is incorporated in the column switch
(windshield wiper and windshield washer switch).

TECHNICAL DESCRIPTION (COMMENT)
If the windshield intermittent wiper interval adjusting
knob is defective, the windshield intermittent wiper
interval can not be adjusted.

TROUBLESHOOTING HINTS

•

Malfunction of the column switch

•

Malfunction of the ETACS-ECU

•

Damaged harness wires or connectors

DIAGNOSIS

Required Special Tools:

•

MB991223: Test Harness Set

Windshield Intermittent Wiper Intervals Adjusting Knob Input Circuit

AC004264

AC003078 AB

CONNECTOR: C-60

COLUMN SWITCH

AC003082AC

JUNCTION BLOCK
(FRONT VIEW)

CONNECTOR: C-82

SWS DIAGNOSIS

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-262

STEP 1. Check the windshield intermittent wiper interval
adjusting knob and column switch body.
Check the resistance at terminal numbers 27 and 28. The
resistance should change smoothly from approximately 0

Ω

("FAST" position) to approximately 1 k

Ω

("SLOW" position).

Q: Is the windshield intermittent wiper interval adjusting

knob in good condition?
YES : Go to Step 2.
NO : Replace the it. Check that the input signal from the

windshield intermittent wiper interval adjusting knob
can be checked and the wiper interval can be
adjusted.

STEP 2. Check column switch connector C-60 and ETACS-
ECU connector C-82 for damage.
Q: Is column switch connector C-60 and ETACS-ECU

connector C-82 in good condition?
YES : Go to Step 3.
NO : Repair or replace them. Refer to GROUP 00E,

Harness Connector Inspection

P.00E-2

. Check that

the input signal from the windshield intermittent wiper
interval adjusting knob can be checked and the wiper
interval can be adjusted.

AC003178

UPPER SIDE

AB

AC003078 AB

CONNECTOR: C-60

COLUMN SWITCH

AC003082AC

JUNCTION BLOCK
(FRONT VIEW)

CONNECTOR: C-82