1993 MITSUBISHI 3000GT Etacs unit

Downloaded from www.Manualslib.com manuals search engine 54-78CHASSIS ELECTRICAL - Lighting System
OPERATION light>l
Battery voltage is always applied to the dome light. When the dome light switch is turned to “ON”,
the dome light will remain lit. After either door is opened if the dome light switch is at “DOOR” position,the dome light will come on.
lWith the dome light turned on (with the ignition switch in the OFF position and with the dome light
switch in the DOOR position), close all doors, and the timer circuit in the ETACS unit will be activatedto gradually vary the voltage for approx. 6 seconds owing to the duty control, and the voltage will
be output to transistor Tr. Since the voltage applied to the dome light gradually decreases, the dome
light will be dimmed.lIf the ignition switch is turned to “ON” while the dome light is lit (while the timer is activated), the
timer circuit will be opened to turn “OFF” transistor Tr. This will immediately turn off the dome light
without dimming. light>-lBattery voltage is always applied to the foot lights and ignition key illumination light.
With the ignition switch in the OFF position, open any door, and all lights will come on.
l
With all lights turned on (with the ignition switch in the OFF position), close all doors, and the timercircuit inside the ETACS unit will operate in the same manner as the dome light to dim all lights.
When the ignition switch is placed in the ON position with all lights turned on (with the timer in operation),the same operation as the dome light will take place.
TROUBLESHOOTING HINTS
Phenomenon
Dome light does not come on
when
a door is opened with the
dome light switch in the DOOR
position.
Check the door switch input signal.
Check the door switch. (Refer to GROUP 42 -
The foot lights and ignitionl
key cylinder illumination
Check the dome light switch.
light illuminate.
lCheck the dome light bulb.
Dome light, foot lights and ignition key illumination light go out
l
at once when doors are closed.Check the door switch input signal.(Refer to P.54-80.)Even if ignition switch is turned on while lights are being
l
dimmed,lightsdo notout at the same time.
Check the ignition switch input signal.
go
(Refer toP.54-80.)
COMPONENT LOCATION
Data ‘link
connect&
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Downloaded from www.Manualslib.com manuals search engine With voltmeterData link connector
’‘:’ ’ ’- Data linkGround ETA,CS 21~33300002230
54-80CHASSIS ELECTRICAL - Lighting System
INPUT SIGNAL

When using the scan tool (MUT) or voltmeter
Using the scan tool or voltmeter, check whether or not the
input signals from each switch are being input to the ETACS
unit.
(1) Connect the scan tool to the data link connector located
at the right side of the junction block or connect the voltme-
ter between the ETACS terminal and the ground terminal.
(2) Check if the buzzer of the scan tool sounds or the needleof the voltmeter moves when each switch is operated.
If the buzzer sounds or the needle moves, the input signalsare being input to the ETACS unit, so that switch can
be considered to be functioning normally. If not, the switch
or switch input circuit is faulty. Check the switch and the
switch input circuit.
When using the MUT-II
cup to 1993 models>
Y2OFOl6400002231
#\,I kQwnd\ \U2OFO163

When using the scan tool (MUT-II)
(1) Connect the scan tool to the data link connector. When
connecting the scan tool to a vehicle up to 1993 models,
use the adapter harness supplied together.
Caution
Turn off the ignition switch beforehand whenever thescan tool is connected or disconnected.
(2) If the scan tool makes a peep sound when each switchis operation (turned ON/OFF), the input signal to ECU
is normally sent from the switch circuit system.
When using the voltmeter
(1)Connect a voltmeter to the ETACS terminal and the ground
terminal of the data link connector using the special tool.
(2) If the voltmeter pointer deflects once when each switchis operated (turned ON/OFF), the input signal to ECU
is normally sent from the switch circuit system.
Ii3
\ ~
id ~
!Lj
[ TSB Revision

Downloaded from www.Manualslib.com manuals search engine 54-200CHASSIS ELECTRICAL - Rear Window Defogger
OPERATIONl
If the defogger switch is turned to “ON” when the generator is generating electricity (L terminal exceeds
10 V.) with the ignition switch at the “ON” position, the timer circuit in the ETACS unit will be operated
to keep the transistor “on” for 11 minutes to close the contact point of the defogger relay. When the
defogger relay is “on”,the defogger and mirror heater will be activated. Moreover, the indicator lightof the defogger switch is lit to inform that the defogger and mirror heater are activated.
lWhen 11 minutes have passed, the defogger and mirror heater will stop activating even if the defoggerswitch is at “ON”. When the defogger and mirror heater are activated (the timer is activated), they
will also stop activating even if the defogger switch is set at “ON” again or if the generator stops
generating electricity (the terminal is 3.5 V or less.)
NOTE
The light automatic shut-off system is valid for the illumination light of the defogger switch. (Refer to
P.54-37.)
TROUBLESHOOTING HINTS
NOTE
For the troubleshooting hints of the automatic light shut-OFF system, refer to P.54-38.
COMPONENT LOCATION
Datalink. connector
216FO125
Data link connector

\V16FO496 1
es.-‘) blocky,6Fww
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Downloaded from www.Manualslib.com manuals search engine 54-202CHASSIS ELECTRICAL - Rear Window Defogger
With voltmeterData link connector
When using the MUT-IICUD to 1993 models>
Y2OFO16400002231
Ground
INPUT SIGNAL

When using the scan tool
(MUT) or voltmeter
Using the scan tool or voltmeter, check whether or not the
input signals from each switch are being input to the ETACS
unit.
(1) Connect the scan tool to the data link connector located
at the right side of the junction block or connect the voltme-
ter between the ETACS terminal and the ground terminal.
(2) Check if the buzzer of the scan tool sounds or the needle
of the voltmeter moves when each switch is operated.
If the buzzer sounds or the needle moves, the input signalsare being input to the ETACS unit, so that switch can
be considered to be functioning normally. If not, the switch
or switch input circuit is faulty. Check the switch and the
switch input circuit.

When using the scan tool (MUT-II)
(1) Connect the scan tool to the data link connector. When
connecting the scan tool to a vehicle up to 1993 models,
use the adapter harness supplied together.
Caution
Turn off the ignition switch beforehand whenever thescan tool is connected or disconnected.
(2) If the scan tool makes a peep sound when each switchis operated (turned ON/OFF), the input signal to ECU
is normally sent from the switch circuit system. 1994 models>
When using the voltmeter
(1)Connect a voltmeter to the ETACS terminal and the ground
terminal of the data link connector using the special tool.
(2) If the voltmeter pointer deflects once when each switchis operated (turned ON/OFF), the input signal to
.ECU
is normally sent from the switch circuit system.
U2OFO163
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Downloaded from www.Manualslib.com manuals search engine CHASSIS ELECTRICAL - Theft-alarm Svstem
TROUBLESHOOTING(UP TO 1993 MODELS)
CIRCUIT DIAGRAM
HEADLIGHT
RELAY
0---------_
IGNITIONIGNITIONSWITCH(IG1)SW1 TCH(ACC)
63
10A
0
15A
c-77)16(c-80)
0.85, B-W
FJ$
B-W
----------1
xSOCI
0.85L
L
Lt
2R-L12R-L1(R.2
’ I
R-B
L
8
3520 53,\---------__ --------__
\II
1"2 /2R ;I----- --A3‘3
1.25R
0
1.25R
3_----,,6
1625R,8,C
I---.*HI
Y
+
LI
E
-B
1A
0.85R-W
(c-01)
0.85R-W
jLIGHTAUTOMATIC 0SHUT-OFF
UNIT
.----------------------
lO(c-65) ETACS UNITI
- -
E54#
G#~O L[r
R-c
R-c
nr-
- -
(LH)(RH)
DOOR TWITCH
;zk77)(c-80)(c-82) (E-15)(m) (E-21)
gj 1~~~~~~~~~
HR15MOOAA
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Downloaded from www.Manualslib.com manuals search engine CHASSIS ELECTRICAL - Theft-alarm System54-209 ~
i
FUSIB ELINK 6
'T 2,,-B ,
5W-BJ/B,,l (c-68)\
T,,
RBI 11;;‘I‘I
' THEFT-ALARMi HORN RELAYI
I(c-72)II
R-E
L
G-E
-0FFJ
3
14(c-76)
R-E
IIiA
(c-78)
L-G1
G-R
_____-_________--
18G-E
L
DIODE
c-12
R-E
L-G
ETACS UNIT
I(c-66) 58
G-E
HORN(LH) (RH)mi-HORNCLOCK
SPRING
GR
(12E
1
HORN
SWITCH
28
d- --z- -
qE!GFm KFn (A-47) (A-48) (A-49) @FEZ) mJ2)(c-57)
II Ei q a q q p---qpq9 ~10~11~~12/13~14115116l1?~~16~19
(c-68) (c-12) (c-76) 673(c-80)
/EiJq @ mmE=FL
HR15MOOBB
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Downloaded from www.Manualslib.com manuals search engine CHASSIS ELECTRICAL - Theft-alarm System54-211
ii
FUSIBLE LINK@I
/
LJ
5W-B+
,,l (c-68) HORN,\J/B
IOD ORSTORAGE
CONNECTOR
(A-11X)
V1,\,\/
ED“11 (C-71) ~~~“10(c-77)“10.85R-B“3F
NATION
1 CENTRAL DOOR t(E-17)GR 571A
LOCKING B-L51----____-________-_______________ --------------- ----------J,EQ(c-66)
ETACSUNIT
0
2BBI I
t
----JL----
2B l6(F)B 5
2B
1-
HRlJMOlAB
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Downloaded from www.Manualslib.com manuals search engine CHASSIS ELECTRICAL - Theft-alarm System54-213 1
FUSIB ELINK sb
~,J/B ‘;/I (c-68),DEDICATED
FUSE
R-B
0
1R-B5
6,,10A
RB[ 11;;
I‘
(c-78)
L-G
R-E
[
G-E
ON
14(c-76)
R-EG-R
(c-02)
7___-________---_8
G-Bi
58
D,'p,"," R-B
(A-26)
iEEi-HORN
(A-27)
G-B
L-G
ETACS UNIT(c-66)
LIFTGATE
CYLINDER
LOCK
SWITCH
(F-23)
,70
1B
1i;yTEfiTE
(c-57)
2G-R
(A-47)
1iv
GR
HORN(LH) (RH)
1
>
CLOCK
SPRING
C-lIA
9
GR
(F-24)2B
1
HORN
SWITCH
2Bdr
(A-06X)0
ii3
1423 q
5
cc-ss)
al/a1
@F-m (A-47) Gz3 (A-49) GF53 (c-02)(c-57)
m Lizi lla q la /fim$mqmj
oF7-ia(c-76)(m(c-80)

/
LJ
HRlBMOlBB
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