Mitsubishi Galant 9G. Manual — part 73

SYMPTOM PROCEDURES

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SIMPLIFIED WIRING SYSTEM (SWS)

54B-288

STEP 5. Check the windshield washer motor.
(1) Disconnect windshield washer motor connector A-29, and

check at windshield washer motor connector side.

(2) Fill the windshield washer tank with washer fluid.

(3) When battery voltage is applied between terminals 1 and 2,

washer fluid should spray out.

Q: Does the windshield washer motor operate normally?

YES : Go to Step 6.
NO : Replace the windshield washer motor. Verify that the

windshield washer works normally.

AC305206AK

CONNECTOR: A-29

HARNESS SIDE

AC307196

2

1

SYMPTOM PROCEDURES

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SIMPLIFIED WIRING SYSTEM (SWS)

54B-289

STEP 6. Check the ground circuit to the windshield washer
motor. Measure the resistance at the windshield washer
motor connector A-29.
(1) Disconnect windshield washer motor connector A-29 and

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

(2) Measure the resistance value between terminal 1 and

ground.

• The resistance should be 2 ohms or less.

Q: Is the measured resistance 2 ohms or less?

YES : Go to Step 8.
NO : Go to Step 7.

STEP 7. Check the wiring harness between windshield
washer motor connector A-29 (terminal 1) and ground.
Q: Is the wiring harness between windshield washer motor

connector A-29 (terminal 1) 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. Verify that
the windshield washer works normally.

STEP 8. 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 9.
NO : Repair or replace the damaged component(s). Refer

to GROUP 00E, Harness Connector Inspection

P.00E-2

. Verify that the windshield washer works

normally.

AC305206AK

CONNECTOR: A-29

HARNESS SIDE

AC209364GR

CONNECTOR A-29
(HARNESS SIDE)

AC305206AK

CONNECTOR: A-29

HARNESS SIDE

AC305977

CONNCTOR: A-12X

AI

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22

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24

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27

28

29

30

31

RELAY BOX SIDE

SYMPTOM PROCEDURES

TSB Revision

SIMPLIFIED WIRING SYSTEM (SWS)

54B-290

STEP 9. Check the wiring harness between windshield
washer motor connector A-29 (terminal 2) and front-ECU
connector A-12X (terminal 31).
Q: Is the wiring harness between windshield washer motor

connector A-29 (terminal 2) and front-ECU connector
A-12X (terminal 31) 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 washer works normally.

HEADLIGHT AND TAILLIGHT

GENERAL DESCRIPTION CONCERNING THE HEADLIGHTS AND TAILLIGHTS

M1549021300264

The following ECUs affect the functions and control
of the headlights and the taillights.

AC305977

CONNCTOR: A-12X

AI

21

22

23

24

25

26

27

28

29

30

31

RELAY BOX SIDE

AC305206AK

CONNECTOR: A-29

HARNESS SIDE

FUNCTION

CONTROL ECU

Taillights

Front-ECU, column switch

Headlights

ETACS-ECU, front-ECU, column switch

High-beam indicator light

ETACS-ECU, column switch

Headlight automatic-shutoff function

ETACS-ECU, front-ECU, column switch

Dimmer automatic reset function

Front-ECU, column switch

SYMPTOM PROCEDURES

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SIMPLIFIED WIRING SYSTEM (SWS)

54B-291

Taillights and headlights illumination

.

Taillights
If the column switch sends a taillight switch "ON" signal to the
front-ECU, the front-ECU turns on its taillight relay, causing the
taillights to illuminate.
NOTE: This description covers the taillights only. In actual driv-
ing, the taillights may be turned off due to the headlight auto-
matic shut-off function. For the details of the headlight
automatic shut-off function, refer to .

.

Headlights

If the column switch sends a headlight switch "ON"
signal to the front-ECU, the front-ECU turns on its
headlight relay (LOW), causing the low-beam head-
lights to illuminate. If the dimmer switch is turned on
while the headlight relay (LOW) is on, the front-ECU
turns on the headlight relay (HIGH), causing the
high-beam headlights to illuminate.

NOTE: This description covers the headlights only. In
actual driving, the headlights may be turned off due
to the headlight automatic shut-off function. For the
details of the headlight automatic shut-off function,
refer to .

AC106502

ON

OFF

ON

OFF

Taillight
switch

Taillight
relay

AB

AC306461

Headlight switch

ON

OFF

Headlight (Low)

ON

OFF

ON

OFF

Headlight
relay (High)

ON

OFF

High-beam
indicator light

ON

OFF

Front ECU
acknowledge

Hi-beam

ACK

OTHERS

Passing/Dimmer
switch

ON

PASS

OFF

AB

<2-bulb type>

<4-bulb type>