1990 MITSUBISHI ECLIPSE Service Manual

3i
ELECTRICAL - Junction Block8-5JUNCTION
BLOCKThe junction block is a feature in which wiring
hamess
connections are centralized for simpler and more reliable wiringharness connections.
The junction block is provided under the instrumentdriver’s seat side.panelat the
CONSTRUCTION OF JUNCTION BLOCK
_.rheft-alarm
iom relay
To enginecompartment
wiring harness
. No connectionTo instrument
;;;+$ring
.’ ./%A0805relay
Rear side
NOTEThe alphabetical symbols on the connectors are associated with the
internal circuit diagrams
(PB-6).To bodywiring harness
he junction block is an integrated assembly ofltermediate connection connectors of wiring
har-ess, fuse box, and relay. On the front side of the
unction block, the connectors for connections from
le heater relay, fuse box, engine compartment
amess and instrument panel harness are provided.On the rear side, the connectors for connections
from the body harness are provided and are
con-
netted in the junction block as shown below.

__._._ -.. .-
8-6ELECTRICAL - Junction Block
INTERNAL CIRCUIT DIAGRAM
---
-
Illll IIII
I II Irr,Illll IIII
r
L”
NOTEThe alphabetical symbols on the connectors are associated with the
connector symbols
(P.8-5).

ELECTRICAL -Relavs, Control Units and Sensors
RELAYS, CONTROL UNITS AND SENSORSROBEAACThe relays, control units and sensor for the various systems are located as described below.
.ILTI-POINT FUEL INJECTION SYSTEM
NameSymbolNameSymbolAir-flow sensor (incorporated within
AMagnet clutch relayG
barometric-pressure sensor andintake air temperature sensor)
Crank angle sensor and top dead center sensorCMPI control relayJDetonation sensor
FMPI control unitK
EGR temperature sensorEOxygen sensorH

Engine coolant temperature sensor
BThrottle position sensorDIdle switch
DVehicle speed sensor (reed switch)I
NOTEThe “Name” column is arranged in alphabetical order.
orated within barometric
re sensor and Intake arr7 (incorporated within barometnc kpressure sensor and intake arrtemperature sensor)-4L 1mo721

8-8ELECTRICAL -Relays, Control Units and Sensors
(7 ! ’ Intake manifold
1, lyJJrI-
I .I
6FlJO85Z
I
/7~ 1J -6FUO8281
b MPI control

33.- .1S~IUlj~%L...i-.ELECTRICAL
- Relays, Control Units and Sensors
AUTOMATiC TRANSAXLE
Name:ontroi unit
Automatic transaxle fluid temperature
sensorMPI control unit
Pulse aenerator A
SymbolNameSymbol
DPulse generator BB
BThrottle position sensor
A
DVehicle speed sensor (reed switch)C
B
NOTEThe “Name” column is arranged in alphabetical order.
Automatic
transaxlfluid temperature sen
16440784
13AO721

_--__ .-
I8-10ELECTRICAL -Relays, Control Units and Sensors
I
1AUI‘O-CRUISE CONTROL SYSTEM
ps+%JVehicle speed sensor (reed switch)
AUTOMATIC SEAT BELT
NameAutomatic seat belt control unit
‘
SymbolNameSymbol
AAutomatic seat belt motor relay
A0

1ELECTRICAL
-Relays, Control Units and Sensors8-11HEATER AND AIR CONDITIONER
INameSymbolName
4ir conditioner control unitDCondenser fan motor relayAir inlet sensor
FEngine coolant temperature switch
Air therm0 sensor
FHeater relayBlower motor High relay
EMagnet clutch relay
$x$enser fan motor High-Low selectingCRadiator fan motor relay
NOTEThe “Name” column is arranged in alphabetical order.Symbol
C
A
G
C
B

__ .__-.... . - -----8-12ELECTRICAL
-Relays, Control Units and Sensors
Blower motor High relay,,,A,
HEADLIGHT (Pop-up System)-7
NameSymbolNameSymt
Headlight relay.APop-up motor relayA
Passing control relayB
NOTEThe “Name” column is arranged in alphabetical order.
+Junction \-- 1block\-