Mitsubishi Galant (2004+). Manual — part 277
SYMPTOM PROCEDURES
TSB Revision
SIMPLIFIED WIRING SYSTEM (SWS)
54B-299
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.
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
CONTINUE
Continue
SYMPTOM PROCEDURES
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SIMPLIFIED WIRING SYSTEM (SWS)
54B-300
54B
HEADLIGHT AND TAILLIGHT
GENERAL DESCRIPTION CONCERNING HEADLIGHTS AND TAILLIGHTS
M1549021300112
The following ECUs affect the functions and control
of the headlights and the taillights.
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 .
.
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
AC106502
ON
OFF
ON
OFF
Taillight
switch
Taillight
relay
AB
SYMPTOM PROCEDURES
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SIMPLIFIED WIRING SYSTEM (SWS)
54B-301
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 .
High-beam indicator light
At the same time that the high-beams are illuminated, the
ETACS-ECU sends a signal to illuminate the high beam indica-
tor via the CAN bus line. The combination meter receives the
transmitted signal and turns the high-beam indicator on and off.
AC306461
Headlight switch
ON
OFF
Headlight (Low)
ON
OFF
ON
OFF
Headlight
relay (High)
ON
OFF
High-beam
indicator light
ON
OFF
Front ECU
acknowdge
Hi-beam
ACK
OTHERS
Passing/Dimmer
switch
ON
PASS
OFF
AB
<2-bulb type>
<4-bulb type>
SYMPTOM PROCEDURES
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SIMPLIFIED WIRING SYSTEM (SWS)
54B-302
Headlight automatic-shutdown function
Even if the lighting switch (taillights switch or headlight switch)
is ON, the headlights (including the taillights) will automatically
go off in the following conditions to prevent the battery from dis-
charging as a result of forgetting to turn off lights.
If the ignition key is turned from "ON" to "LOCK" (OFF) or
"ACC" position with the lighting switch turned ON, and this
state continues for three minutes, the light will automatically be
turned off. If the driver's seat door is opened during these three
minutes, the light will go off one second later.
NOTE: The headlight automatic-shutoff function can be cus-
tomized on vehicles equipped with a multi center display (mid-
dle grade type). Refer to
Dimmer automatic reset function
If the headlight switch is turned off while the high-beam head-
lights are on, the dimmer switch will be reset. Because of this,
the headlights will illuminate at low beam the next time that they
are turned on. The dimmer switch will be also reset if the dim-
mer switch is turned on unintentionally while the passing switch
is operated.
AC101466AB
T1: 3 minutes
T2: 1 second
ON
ON
ON
OFF
OFF
OFF
Ignition switch
(IG1)
Driver's door
switch
Taillight switch or
headlight switch
Illumination
output signal
ON
OFF
T1
T2
AC106399
ON
OFF
ON
OFF
Dimmer
switch
Headlight
switch
HIGH
LOW
OFF
Headlight
AC
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