Mitsubishi MOTORS Eclipse 1997 User manual

BACKUP
Service Manual
ECLIF=SE/
ECI-I’SE
1997
Volume 2
Electrical
FOREWORD
This Service Manual has been prepared with the
latest service information available at the time
of publication. It is subdivided into various group
categories and each section contains diagnostics,
disassembly, repair, and installation procedures
along with complete specifications and tightening
references. Use of this manual will aid in properly
performing any servicing necessary to maintain or
restore the high levels of performance and reliability
designed into these outstanding vehicles.
This BACKUP DSM manual IS to be used ONLY as a BACKUP. Please DO NOT REDISTRIBUTE
WHOLE SECTIONS. This BACKUP was sold to you under the fact that you do indeed OWN
a GENUINE DSM MANUAL. It CANNOT BE considered a REPLACEMENT (Unless your original
manual was lost or destroyed.)
Please See README.N or README.HTML for additional Information.
Thank you. G~mm~emymanual@hotma~l.com
II
WE SUPPORT
VOLUNTARY TECHNICIAN
CERTIFICATION THROUGH
II
General
.........................
Component Locations
...........
Configuration Diagrams
.........
Circuit Diagrams
................
Engine Electrical
...............
Chassis Electrical ..............
Alphabetical Index
.............
NOTE:
For information concerning all compo-
nents other than the electrical system,
refer to Volume 1 “Chassis & Body” of
this paired Service Manual.
A
MITSUBISHI
MOTOR SALES OF AMERIC Inc.
Mitsubishi Motors Corporation resewes the right to make changes in
design or to make additions to or improvements in its products without
imposing any obligations upon itself to install them on its products
previously manufuctured.
@1996 Mitsubishi Motors Corporation Printed
in U.S.A.

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2
GENERAL - Harness Connector Inspection
Harness connector’
Harness for
checking the
contact pressure
of connector
pins
A 01 A0579
-I
HARNESS CONNECTOR <INSPECTION
ooiooa9oo48
CONNECTOR CONTINUITY AND VOLTAGE TEST
Follow the steps below to avoid causing poor connector con-
tact and/or reduced waterproof performance of connectors
when checking ,@ontinu/ty and/or voltage at connectors of
waterproof connectors..
“a
(1) If checking is performed with the circuit in the state of
continuity, be sure to use the special tool (harness connec-
tor). Never insert a test bar from the harness side, because
to do so will reduce the waterproof performance and result
in corrosion.
(2) If the connector is disconnected for checking and the
facing part is the female pin side, the harness for checking
the contact pressure of connector pins should be used.
Never force the insertion of a test bar, because to do
so will cause poor or .improper, contact.
(3) If the facing part is the male pin side, contact the test
bar directly to the pins. Care must be taken not to short-cir-
cuit the connector pins.
IMPROPER TERMINAL ENGAGEMENT CHECK
When the terminal stopper of the connector is out of order,
engagement of the male and female terminals becomes im-
proper even when the connector itself is engaged perfectly
and terminal sometimes slips out to rear side of connector.
Make sure, that each terminal does not come off the connector
by pulling each harness wire.
CONNECTOR TERMINAL ENGAGEMENT AND
DISENGAGEMENT
A connector that engages loosely can be repaired by removing
the female terminal from the connector housing and raising
its lance to establish securer engagement. Removal of the
connector terminal used for MFI and ELC4 AK control circuit
can be done in the following manner.
COMPUTER CONNECTOR
(1) Insert a screwdriver [1.4 mm (.06 in.) width] as shown
in the figure, disengage front holder, and remove it.
. . . ,
&i :,”
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‘I

GENERAL -’ Harness Connector Inspdibn
Housing lance
16R1321
P
Needle
II
16R1322
Ho&sing lance
16Rl323
16Rl324
(2); Insert the harness terminal tv,Je repaired deeR jnt&Jffe
conneqtor from harness side- and%.nold it t&T:, I” :’
I ,+
#‘,i
*
(3) Insert the tip of Rhe screwdriver [1.4 mm ~(.06’in.)‘~k%kh”]
into the connector as sho$nin the figure, raise the housing
.lance slightly with it, and ‘pull”,out, the harness.
..;
Caution
I ,;
“,
T6ol ‘No. 753787-l supplied b;i AM$c&$ ,&kc!
instead of screwdriver.
,.
,,” ,,. ,‘I
.L, ,’
; ._ . . _
”
,,.:r,. < .,
‘.
, -I_’
_
,
^ ,_ _
(4) Insert a needle through .the hole provided on tfe terminal
_“I
and raise the centact paint of the male terminal.
_’
ROUND WATERPROOF Ci)NNEC’$fk
- ..‘.I ,+
(1). Remove the waterproofYkap by using a screv$$&r.
:
(2) Insert the tip of the screM$friver [1.4 mm (06 In.) ?r 2.0
mm (.08 in.) width] into the connec$r as shown tn the
figure, raise the housing lance slightly, with it, and pull
I--_ _=-. I
““’
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(3), Insert a screwdriver through the hdie provided en
terminal and raise the contact point of the male tern’
-2
,’
1 :,
,”
.i
,‘,,

4
GENERAL - Harness Connector Inspection
\‘ 16R1325
Housing lance
16Rl326
16Rl329
16R1326
27
Terminal lance OOOOO~OO
\
1 TSB
RECTANGULAR WATERPROOF CONNECTOR
(1) Disengage the front holder by using a screwdriver and
remove it.
(2) Insert the tip of a screwdriver rO.8 mm (.03 in.) width]
into the connector as shown in the figure, push it lightly
to raise the housing lance, and pull out the harness.
*If the right size screwdriver is not available, convert a
conventional driver to the proper size.
(3) Press the contact point of the male terminal down by
holding a screwdriver [1.4 mm (.06 in.) width] as shown
in the figure.
1
evision

GENERAL - How to Diag~d&&
6
HOW TO DIAGNOSE
The most important point in troubleshooting is to deterimine “Probable Causes”. Once the probable causes
are determined, parts to be checked can be limited to those associated with such ‘probable causes.
Therefore, unnecessary checks can be ‘eliminated. The determination of the probable causes must be
based on a theory and be supported by facts and must not be based on intuition only.
TROUBLESHOOTING STEPS
If an attempt is made to solve a problem without going through correct steps, for troubleshooting, the
problem symptoms could become more complicated, resulting in failure to determine the-causes correctly
Observation of Problem Symptoms
2 Determination of Probable Causes
\
Checking of Parts Associated with
Repair and Confirmation
I
In determining the probable causes, it is necessary to check
the wiring diagram to understand the circuit as: asystem.
Knowledge of switches, relays and other parts is necessary
for accurate determination. The causes of ‘simiiar’problems
in the past must be taken into account.
.’ ‘.
.:
“._i
‘, 1
Troubleshooting is carried out by making step by step checks /
until the true cause is found. Always go through the proce-
dures considering what check is to be made where for the
best results.
‘,
After the problems are corrected, be sure to check that the
system operates correctly. Also check that new problems
have not been caused by the repair.
-_
INFORMATION FOR DIAGNOSIS
This manual contains the cable diagrams as well as the individual circuit drawings, operational explanations,
and troubleshooting hints for each component required to facilitate the task of troubleshooting. The’
information is complied in the following manner:
(1) Cable diagrams show the connector positions, etc., on the actual vehicle as well as the harness
path.
(2) Circuit drawings show the configuration of the circuit with all switches in their normal positions.“.
(3) Operational explanations include circuit .drawings of voltage flow when the switch- is ‘operated and
how the component operates in reaction.
~
(4) Troubleshooting hints include numerous examples of problems which might occur, tratid backward:
in a common-sense manner to the origin of the trouble. Problems whose origins may not be found
in this manner are pursued through the various system circuits.
NOTE
Components of ECI, ETACS, ECS, etc. with ECU do not include 3 and 4 above. For this information,
refer to a manual which includes details of these components.
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6
GENERAL - How to Diaanose
1660222
0
C
V
I%!
50
Selector knob
.
Pointer
zrl
QQ
\
Jo L
-3 DCV
1660224
1680225
16BO226
INSPECTION
1. Visual and aural checks
”
Check relay operation, blower motor rotation, light illumina-
tion, etc. visually or aurally. The flow of current is invisible
but can be checked by the operation of the parts.
,
2. Simple check&
I’
For example, if a headlight does not come on and a
faulty fuse or poor grounding f6 suspected, &place the
fuse with a new one or ground the light to the body by
a jumper wire to determine which part is responsible for
the problem.
3. Checking with instruments
Use an appropriate instrument in ‘an adequate range and
read the indication correctly. You, must have sufficient
knowledge and experience to handle instruments correct-
ly.
: s
,,
_ ,b t
INSPECTION INSTRUMENTS
For inspection, use the following instruments:
1. Test lights
A test light consists of a 12V bulb and lead wires.’ . It
is used to check voltages or shortcircuits.
> “I,,’ .ZL
2. Self-power test light
A self-power test light consists of a bulb, battery and
lead wires connected in series. It is used to check continu-
ity or grounding.
I
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GENERAL - How to Diaanoie
3. Jumper wire
- “-. I/,
A jumper wire is used to close an open circuit. Never
use one to connect a power supply directly to a bad. 4
. .
-
-
1
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1. ’
-9.;
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4%
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Voltmeter
1
A voltmeter is used to measure the circuit voltage. Normal-;
ly, the positive (red lead) probe is applied to the point
of voltage measurement and the negative. (black lead):
probe to the body ground.
’
I
1680227
4.
lOBO226
I.
Ohmmeter
. -.-
An ohmmeter is used’ to check continufty or measure
resistance of a switch or coil. ’ If the measuring range
hasbeen changed, the iero point must be:adJusted before
measurement.
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“*; 1 i ‘CI
i >jSC
‘, .
.: 0
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., 75.
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1.’ .Normal open OF normal clash $&h ’
j
Switches are classified into those which make the circuit’
open’and those which make the circuit closed when off.
,..
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Current does not flow Current flows
16x0691
OOODO4Dl
16X0690
‘(NC) type
ON
NQmal CIC
OFF
a
I
a
Current flows Current does not flow
16X0600
00000402
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8 GENERAL - How to Diigksd
i
l6AOZS3
12 3
m
4 5 6
16W666
00000403
Coil
Iron
piece
Cover
Iron
core
Contact
1680231
Power supply
Relay
Fuse
i
i
Switch
Light
o:{ON
T -
16A025a
Normal open (NO) type
I
4
1
Deenergized state Energized state
Current does not flow
ml
a
Current flows
10x0665
00000404
2. Switch connection
This figure illustrates a complex switch. The continuity
between terminals at each position is, asdndicated in the’
,_ ‘I
,,
table below.
” ;
Position
) Terminal No.
I:
1
* 2 ‘3
,4.. .d 6
OFF
1 st stage
J,o ]
I I
IO+-0
2nd stage
A
3rd &age , 0 n 0
I,
’
4th stage 0 n
I d,
0
-’ NOTE
.“;:’ ,
0-0 denotes continuity between -terminals.
, ,.-
.; ,, ’
CHECKING RELAYS . ‘: ”
1. When current flows through the,.coit of a,relay,; its core
is magnetized to ‘attract the irdrv!piece, closing (ON) the
contact at the tip of the iron pie@,,-Whe~n~ the coil current
’ is turned off, the iron piece returns to its originatposition
by a spring, opening the contact (QFF).
1
‘,
i ,
^I’
_r/
“,.. .
: 2. By using a relay, a heavy current can ,be turned on and
off by a switch of small capacity. For example,- in the,
circuit shown here, when the ‘switch iq turned on (closed),
current flows to the coil of the relay. Then, its contact
is turned on (closed) and the light comes on. The current
flowing at this time to the switch is the relay coil yrrent:
only, and is very small.
’
.~
3. The relays may be classified into the normal open-type ’
and the normal close-type’by their contact construction.
NOTE
The deenergized’state means that no current is flowing’
through the coil and the energized state means that current’
is flowing through the CM.
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Normal close (NC) type
Deenergized state
3 1
-
OIli
a
Curt&t fi2ows
16x0602
Energized state
3 1
--
4lal
X
Current ioes*not Row
16X0$63
00000405
-izz= Fuse b’ock
I
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EEGI
- -
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Testjabs
State of fuse blown due to overcurrent
1600237
When ‘a normal:.close-$pe relay as ill&r&d h&e is
checked, there should be continuiw between terminal4
.1 and 2 and between terminals 3 and 4 vt/hqn-the rela#
is deeqergized, and the contifiirity shoqlg b&‘f&tbet\roeen
terminals 3 and, 4 when the batter)GMage is aeplied
to the terminals 1 and 2. ,A re’!, y cab; be dhecked in
“t
this manner. It cannot be deftirm ne if
a%4ay is okay
or faulty by checking its state or$y when it is deendrgized
r (or energized).
_
‘I.
s
” .
State of fuse blown due to thermal fatigue
CHECKING FUSES
A blade type fuse has test taps provided tqDallow checkin$
of the fuse itself without removing it from Ihe -f&e block;
The fuse i’s okay if the test light comes, ore $@&~‘,l~s one
” lead is connected to the test taps (one $t a tip@ and the
other lead is grounded. (Chapge.the ig,nltlon switch m$ition
so that the fuee circuit becomes live.)
I
CAUTIONS IN EVENT ‘OF BLOWN FUSE ‘-
-
When a fuse is blown, there are two, probable cai& ai
follows: One is that it’is blown dire 10 flow # curr,,bt ‘exceeding
its rating. The other is that it is blowti dtie$e’.re@@ed on/off
current flowing through it. Which of thetwo ca$e$ &.resppnsi-
ble can be easily determined by visual che’i=k as .de&nbed
below.
2 ii
(1) Fuse blown due to current exceeding’ rating
The illustration shows the state of $fu$e bldwn due ta
this cause.
In this case, do not r&lace ttie fuse with
a new one hastily since a current heavy :enough to,,-blow
the fus&‘has flowed through it, First, check the &cuit
use only a fase of the for shot=& and check for abnormal,
electric parts. After correcting shorts dr replacing parts,
use only. a fuse of the same capacity as a replacement.
Never use a fuse of lager capacity than the one that
has blown;; If such a fuse is used, electric parts or wirings
could be damaged before the fuse blows in the event
an 0vRrcurrent occurs again.
(2) Fuse blown due to repeated current on/off
,
The illustration shows the state of a fuse blown due to’
repeated current on/off.
Normally, i this Q$e of problem
occurs after a fairly long period of use and is less frequent
than the above type.
In this casi~+,~ simply repj@e with
a new fuse of the same capacity. ’
.’
_ ,-! .
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I

10
GENERAL - How to Diagnose
Power supply
-r
Motor
CABLES AND WIRES CHECK ;
1. Check connections for looseness, rust and stains.
2. Check’terminals and wires for corrosion by battery electro-
lyte, etc.
3. Check terminals and wires for open circuit or impending
open circuit.
4. Check wire insulation and coating for damage, cracks
and degrading.
5. Check ,conductive parts of terminals for contact with other
metallic parts (vehicle body and other parts).
6. Check grounding parts to verify that there is complete
continuity between attaching bolt(s) and vehicle body.
7. Check for incorrect wiring.
8. Check that wirings are clamped to prevent contact with
sharp corners of the vehicle body, etc. or hot parts (exhaust
manifold, pipe, etc.).
9. Check that wirings are clamped .firmly to secure enough
clearance from the fan pulley, fan belt, and other rotating
or moving parts.
10. Check that the wirings between the fixed parts such as
the vehicle body and the vibrating’ parts such as the engine
are made with adequate allowahce for vibrations.
BATTERY HANDLING
When checking or servicing does not require ‘power %om
the on-vehicle battery, be sure to disconnect the cable from
the battery (-) terminal. This is to prevent problems that
could be caused by a short circuit. Disconnect the
(k) terminal
first and reconnect it last.
8’
GENERAL ELECTRICAL SYSTEM CHECK
A circuit consists of the power supply, switch, relay, load,
ground, etc. There are various methods to check a circuit
including an overall check, voltage check, short-circuit check,
and continuity check. Each of
# these methods is briefly
described in the following:
1. VOLTAGE CHECK
(1) Ground one lead wire of the test light. If a voltmeter
is used instead of the test light, ground the grounding
side lead wire.
(2) Connect the other lead wire of the test light to the
power side terminal of the switch connector. The
test light should come on or the voltmeter should
indicate a voltage.
(3) Then, connect the test light or voltmeter to the motor
connector.
The test light should not come on, or
the voltmeter should indicate no voltage. When the
switch is turned on in this state, the test light should
come on, or the voltmeter should indicate a voltage,
with motor starting to run.
(4) The circuit illustrated here is normal. If there is any
problem, such as the motor failing to run, check volt-
ages beginning at the connector nearest to the motor
until the faulty’ part is identified.
1 TSB Revision

GENERAL - How to Pia,gpose
2. SHORT-CIRCUIT CHECK
2;. ;:’
Because the fuse has blown, it is probable that there is a short circuit. Follow the procedures
below to narrow down the short-circuit location.
Take out the blown fuse and connect the test light to the
disconnected terminal (switch: OFF).
Short-circuit between the fuse block and the switch A.
1
Switch ON the switch. (The test light illuminates but the illumination
light does not.)
1
Disconnect the connector of the illumination light.
I
The test light remains illuminated. Yes
- Short-circuit between the switch and the illumination light B.
+
No
1 Short-circuit between the connector and the illumination light C. )
A
Power supply
.--._
light ,
(Remove the fuse.)
Illumination
light
5
16Aou)z
B
Power supply
(Remove the fuse.)
I.
T
Disconnect the load
Illumination
light
1
MAO503
I--’
C
Power supply
Test
light Fuse block
(Remove the fuse.)
Switch
Disconnect the load
Illumination
light IMOW
-c
00000741
Self power test light
(or ohmmeter)
J
3.
CONTINUITY CHECK
(1) When the switch is in the OFF position, the self power
test light must illuminate or the ohmmeter should read
0 ohm, only when the terminals 1 and 2 are
interconnected.
(2) When the switch is the ON position, the self power
test light should come on or the ohmmeter should
read 0 ohm, only when the terminals 3 and 4 are
interconnected.
r
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12
NOTES
,d
‘, i

CONTENTS
701o8ooo198
Control Unit
‘<<, ,J
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . i . . . . . . . . . d..m..
DiodeDiode
1. 1, 1. 1,
.; . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ;.;L.;..*; .; . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ;.;L.;..*;
::
I,, .*- “‘“‘“, :i I,, .*- “‘“‘“, :i
,f >’ _ I ,f >’ _ I
*, _: *, _:
,._, ‘. ,._, ‘.
1s1s
..,Qi ? ..,Qi ?
Fusible Link and Fuse ’ Fusible Link and Fuse ’
!!
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..;.. .‘.‘.~.‘.‘. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..;.. .‘.‘.~.‘.‘.
’ < ’ <
-’ ‘- ,1 ?, i ~,” -’ ‘- ,1 ?, i ~,”
.>i ’ I I,,, .-.+ .>i ’ I I,,, .-.+
.I&.’ ;,$“\I , .I&.’ ;,$“\I ,
: 1 :x : 1 :x
; 4*x., ; 4*x.,
+- I +- I
!!
GroundingGrounding
. .. .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
,- “07 r.<- ,- “07 r.<-
,,
Grounding Cable
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
-_
Inspection Terminal
. . . . . . . . . . . . . . . . . . . . . . . . ..d..................
20
l6 - ..,;,
!,.“#“: A: .”
Other Devices <2.0L Engine (Non-turbo)> . . . . . . . . . . . . . . . . . . . . . . .
i
5
Other Devices <2.0L Engine (Turbo) and 2.4L Engine> A;‘.‘. ,. 2’:: ;. ‘: .’ ;‘1$ ‘“! :“i “‘:
.1 -,
_ ,’
, : $;” ;’
:.a.+
.,). 1 /)
,.,f .‘,’ ,,( ‘i!
!.I\, t
Relay
. . . . , . , . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..J?.h.‘.. . .i‘.‘i .“.-,
.
,‘_,,a
2p j
2” ‘. r
I
I’*-
‘-~:e ,”
,A
Sensor <2.0L Engine (Non-turbo)>
i: “.
: : j
‘ii
,,
. . . . . . . . . . . . . . . , . . . . . ii’j . . . . .
‘.
&z. “- ;:
,”
Sensor <2.0L Engine (Turbo)>
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
26
i
Sensor <2.4L Engine> .:
”
. . . . . . . . . . . . . . . . . . . . . ..i..................
31
Solenoid and Solenoid Valve
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
37

14
COMPONENT LOCATIONS - Fusible Link and Fuse
FUSIBLE LINK AND FUSE
‘_ i-
701600i0176
Name
Symbol Name Symbol
Dedicated fuses No. 1 - 12
A*1 Multi-purpose fuses
H
Dedicated fuse No. 13
,
D”2
i*3
I
,Fusible ,links f$). l-9 “’
w ’
:
i
:, -_ ,,
C2
F*”
I
Dedicated fuse (for auto-cruise control system) 1 G*2**3
,: I
NOTE
l l: 2.0L Engine (Non-turbo).
l 2: 2.0L Engine (Turbo).
*3: 2.4L Engine.
For details of fusible link and fuse, refer to CENTRALIZED JUNCTION
<2.0L Engine (Non-turbo)>
&4L Engine>
I245
<2.0L Engine (Turbo)>
1 TSB Revision
I

COMPONENT LOCATlOlilS - Fusible’~Lii& hid h&e
,,..
-, _ _
Dedicated fuses
//
i)/edikaied
--A3
/fuses No.5-12‘
Dedicated%.& EJ~
4 (for auto-cruise
_ control system)
fuses
1 TSB Revision

COMPONENT LOCATIONS - Inspection Terminal
INSPECTION TERMINAL
7o199qln
Name
Data link connector
Engine speed detection connector l
NOTE
l : 2.0L Engine (Turbo) and 2.4L Engine.
Symbol Name Symbdl
B
Fuel pump check connector *
A8
A
16X0733 16XO7Jl
00003774
n .,,
*
,+I
i
,:’
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1

COMPONENT LOCATIONS - GiOcChfi,h~~
‘W
, l*~. kI,I*-
,,
GROUNDING
<2.0L Engine (Non-turbo)>
<2.0L Engine (Turbo) and 2.4L Engine>
: ,
.“-
.,-.
.-
.1
NOTE
l-14 numbers correspond to body ground point No. in CIRCUIT DIAGRAMS.
”
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./ ‘_I

COMPONENT LOCATIONS - Grounding
.,
.i
I
A16XO766
I ’
A16XO776
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