Mitsubishi Galant. Manual — part 676

SWS DIAGNOSIS

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-99

STEP 1. Check the windshield wiper operation.

Q: Does the windshield wiper work normally?

YES : Go to Step 2 <when using scan tool MB991502> or 3

<when using a voltmeter>.

NO : Solve the problem first. Refer to

P.54B-82

.

STEP 2. Check the input signal (by using scan tool
MB991502).
Check the input signal from the windshield washer switch.

CAUTION

To prevent damage to scan tool MB991502, always turn the
ignition switch to the "LOCK" (OFF) position before
connecting or disconnecting scan tool MB991502.
(1)Connect scan tool MB991502 to the data link connector.
(2)Check that the tone alarm of scan tool MB991502 sounds

when the input signal enters.

Q: Does the tone alarm of scan tool MB991502 sound when

the input signal enters?
YES : Go to Step 4.
NO : Check the input signal circuit from the windshield

washer switch. Refer to Inspection Procedure N-15
(

P.54B-260

).

STEP 3. Check the input signal (by using a voltmeter).
Check the input signal from the windshield washer switch.
(1)Use special tool MB991529 to connect a voltmeter between

ground terminal 4 or 5 and ETACS-ECU terminal 9 of the
data link connector.

(2)Check that the voltmeter indicator deflects once when the

input signal enters.

Q: Does the voltmeter indicator deflect?

YES : Go to Step 4.
NO : Check the input signal circuit from the windshield

washer switch. Refer to Inspection Procedure N-15
(

P.54B-260

).

STEP 4. Check the washer motor.
(1)Disconnect the washer motor connector A-33.
(2)Fill the washer tank with water.
(3)Check that the water squirts out strongly when battery

positive voltage is applied to terminals 1 and 2.

Q: Is the washer motor in good condition?

YES : Go to Step 5.
NO : Replace it. The windshield washer should work

normally.

AC003081 AB

16 PIN

MB991502

AC003083

16 PIN

AB

ETACS-ECU
TERMINAL

GROUNDED TERMINAL

MB991529

AC003168 AB

CONNECTOR A-33

SWS DIAGNOSIS

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-100

STEP 5. Check the washer motor ground circuit at the
washer motor connector A-33.
(1)Disconnect the washer motor connector A-33 and measure

at the harness side.

(2)Measure the resistance between terminal 2 and ground.

Q: Is the resistance between terminal 2 and ground less

than 2 ohm?
YES : Go to Step 8.
NO : Go to Step 6.

STEP 6. Check washer motor connector A-33 for damage.
Q: Is washer motor connector A-33 in good condition?

YES : Go to Step 7.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection

P.00E-2

. The windshield

washer should work normally.

STEP 7. Check the harness wire between washer motor
connector A-33 and ground.
Q: Is the harness wire between washer motor connector A-

33 and ground in good condition?
YES : There is no action to be taken.
NO : Repair it. The windshield washer should work

normally.

AC003169 AB

CONNECTOR A-33
(HARNESS SIDE)

AC003129 AC

CONNECTOR: A-33

AC003129 AC

CONNECTOR: A-33

SWS DIAGNOSIS

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-101

STEP 8. Check washer motor connector A-33 and front-
ECU connector A-09X for damage.
Q: Are washer motor connector A-33 and front-ECU

connector A-09X in good condition?
YES : Go to Step 9.
NO : Repair or replace them. Refer to GROUP 00E,

Harness Connector Inspection

P.00E-2

. The

windshield washer should work normally.

AC003129 AC

CONNECTOR: A-33

ACX02500 AD

BATTERY

CONNECTOR: A-09X

SWS DIAGNOSIS

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-102

STEP 9. Check the harness wires between washer motor
connector A-33 and front-ECU connector A-09X.
NOTE: After checking intermediate connector C-05, check the
wires. If intermediate connector C-05 is damaged, repair or
replace it. Refer to GROUP 00E, Harness Connector
Inspection

P.00E-2

.

Q: Are the harness wires between washer motor connector

A-33 and front-ECU connector A-09X in good condition?
YES : There is no action to be taken.
NO : Repair them. The windshield washer should work

normally.

AC003129 AC

CONNECTOR: A-33

ACX02500 AD

BATTERY

CONNECTOR: A-09X

AC003089 AC

CONNECTOR: C-05