relay ISUZU TROOPER 1995 Workshop Manual

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HARNESS
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ENGINE
ROOM
HAR~NESS
~:~i 16
RELAY
& FUSE
BOX
20
(FL-1,
FL-2,
FL-3,
FL-6,
F ) -------------"-
~/ /
BATTERY"------,//
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TAILGATE
HARNESS
(RH)
\,
TAILGATE
HARNESS
(LH)
R-3 R-4
RR
DOOR
HARNESS
ILHl
FRT
DOOR
HARNESS
(LH)

H-22 H-23 H-24
BODY
HARNESS
FUSE
BOX
(C-1
-C-241
ENGINE
ROOM
HARNESS
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8-38 CHASSIS ELECTRICAL
GENERAL DESCRIPTION
SYSTEM REPAIR
START AND CHARGING
CHASSIS ELECTRIC L 8-38
The system consists ofthe starter switch, starter, generator, starter relay, clutch start SW (M/T), mode SW (A/T),
heater & AJC relay.
When the starter SW is set to the "ST" position with the AJT select lever at "P" (Parking) or "N" (Neutral)~ osition
(Mode SW "ON"), or the clutch pedal depressed (Clutch start SW "ON"), the battery positive voltage is ~pplied
to the starter solenoid coil through the starter relay to start the starter. At the same time, the starter re ay cuts
off the blower motor and the AJC circuit.
OPERATION OF THE CIRCUIT
STARTER RELAY
<~
STARTER
BATTERY(+)
~ .. ~ ~ ST OFF
~A!fJ-D I I -r-1 I I I I I
STARTER SW ·sTn
CLUTCH START SW (MfTl ·ow (When clutch pedal is depressed)
,-------+----------.GENERATOR
~ '; L.-----+----------. A/C RELAY
¢!) (MrrJ
D r---I
I
I r--r-MODE SW (A/T) I ~ I y, ·oNn I /~ (When shift lever I is at P or N position)
D I -r-I L ___
D
NOTE: Arrow marks • c:::::> • indicate the direction of current
Fig. 8-54
•

, cCi" 00 I (11
(11
(
CLUTCH
START
SW
(M/Tl
ANTI-THEFT
CONTROLLER
STARTER
RELAY:
STARTER
" ~-
X-17
P-2
-, '
RELAY
& FUSE
BOX
(FL-1,
FL-2)
""" "'
P-1
'
----------
... / ,.,
BATTERY
If
I
GROUND: BODY
/ H-41
,_
(
STARTERSW
( RELAY:
HEATER
&AIC
FUSE
BOX
(C-1,C-8,C-19,C-20)
CLUTCH
PEDAL
(M{T)
MODE
SW.
(A/11
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rw
0.85Y
----------------~o~.s~rw~~~-------------l ~13r---------~o-~s~rw~~~--------~
.,
., d
., le '"'
BOOY-LH II
GENERATOR
0.85Y
0.85Y
3W
RELAY;
CHASSIS ELECTRICAL 8-41
SHIFT LOCK CONTROLLER (5) (TO PAGE 8-2021
WARNING LIGHTS (METER) (TO PAGE 8-291 I
5W
HEATER & AIR CONOmONING
~
C-19 C-20 25A 10AAIC SLOWER
~N !~ b(ll ~ol ;~ cr:!l :::><0 ~t :f ~g (g

OFF
SW position Terminal No.
ON: Clutch pedal depressed
OFF: Clutch pedal released
Fig. 8-62
B REMOVAL (FIG.S-63)
2
Preparation: Disconnect the battery ground cable.
Fig. 8-63
1. Clutch start switch
Disconnect the connector
Loosen the lock nut, then turn the clutch start
switch counterclockwise.
B INSTALLATION
To install, follow the removal steps in the reverse
order.
STARTER RELAY
~ INSPECTION
ltgl Check to see if there is any continuity between
the relay terminals. (Fig. 8-64)
Replace the relay with a correct one when the
result of inspection is found abnormal.
CHASSIS ELECTRICAL 8-45
CD-®······ · · Continuity
@-G)· . · · · · .. No continuity
(When battery voltage is applied between®-@)
CD-®· · · · · · · · No continuity
@-G)· · · · · · · · Continuity
NOTE:
For relay removal, refer to "Connector Handling"
under "NOTES FOR WORKING ON ELECTRICAL
ITEMS"
in this section.
®JI ®~~
@~
®
Fig. 8-64
HEATER & AIR CONDITIONING RELAY
~ INSPECTION
l'fll Check to see if there is any continuity between
~ the relay terminals. (Fig. 8-65)
Replace the relay when the result of inspection is
found abnormal.
®-G) ..... · .. No continuity
(When battery voltage is applied between CD-@)
®-G) .... · · .. Continuity
Fig. 8-65

.~·-
, ca· CIO I O'l O'l
ENGINE
COOLANT TEMPERATURE SENSOR
VSV:
INTAKE
AIR~""-"-,
FUEL
~,
'"-
E-22
INJECTOR
No.5
'~~
FUEL
~
"':·.E-23
INJECTOR
No.3
"-
'"<
FUEL
"-
·,,,
E-~
4 /'
INJECTOR
No.'1'~-
1~4 "...

.......
. .......
' '
/
BODY
ASM
"-..'-
>
DIS / / E-18
ICM !POWER)
THROTILE '
E-~5·.-..,
.. '-, ·,/
r
E-2~,,
/E-5v~~;>o~~
--vsv:EGR
FUEL
INJECTOR
No.6
E-11
~E-10 ~FUEL
INJECTOR
No.4
E-27-+
"'
:1
~
.........
_
'-......
"·INTAKE
AIR TEMPERATURE SENSOR
ECM EGR EVAP
lAC
ICM MAP TP vsv )
X
·"
~
FUEL
INJECTOR
No.2
VSV: EVAP CANISTER
E28
E29
RESISTOR:UPSHIFT-M/T

CRANKSHAFT
POSITION
SENSOR
MAP
SENSOR RELAY:UPSHIFT-M/T ,
ENGINE
CONTROL
MODULE
EXHAUST GAS RECIRCULATION
EVAPORATIVE EMISSION IDLE
AIR CONTROL
IGNITION CONTROL
MODULE
MANIFOLD ABSOLUTE PRESSURE
THROTILE POSITION VACUUM
SWITCHING
VALVE
DIODE-AfT
'...,
RELAY:
ECM
MAIN
~"'-.,'...,
RELAY:FUEL
PUMP
'....
'
RELAY
& FUSE BOX
(FL-1,FL-2,FL-3,F-2,F-10)
BATIERY~
H-41 H-42~
KNOCK SENSOR
MODULE
)
DATA
LINK
CONNECTOR
VEHICLE
SPEED
SENSOR
(METER)
MALFUNCTION INDICATOR LIGHT (CHECK ENGINE) UPSHIFT INDICATOR LIGHT
(METER)-M/T
STARTER
SW
·~FUEL
PUMP
EVAP CANISTER
)
~
co I
~
~ co
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0
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(
FUEL INJECTOR
No.1
/
FUEL INJECTOR
No.5
FUEL INJECTOR
No.3
I
\/.
ICM
CPOWERl
_/
E-27
cp
I
CRANKSHAFT
~
POSITION SENSOR
ECM
: ENGINE
CONTROL
MODULE
EGR
:EXHAUST
GAS
RECIRCULATION
lAC
: IDLE
AIR
CONTROL
ICM
: IGNmON
CONTROL
MODULE
MAP
: MAN
I FORD
ABSOLUTE
PRESSURE
VSV
:VACUUM
SWITCHING
VALVE
(
VSV:EGR I VSV:
EVAPORATIVE
EMISSION
CANISTER
THROTTLE
POSmON
SENSOR
~FUEL
INJECTOR
No.6
FUEL
INJECTOR
No.4
FUEL
INJECTOR
No.2
ICMCCRl ICMCCONTl
RESISTOR:UPSHIFT-MIT RELAY:UPSHIFT-1-MIT
DIODECAITl
RELAY:
ECM
MAIN
RELAY:FUEL
PUMP
RELAY
& FUSE
BOX
CFL-1,FL-2,FL-3,F-2,F-10l
H-41 H-42
POWER
STEERING
PRESSURE
SW.
H-33
VEHICLE
SPEED
SENSOR (METER) MALFUNCTION INDICATOR
LIGHT
(CHECK
ENGINE)
UPSHIFT
INDICATOR
LIGHT
CMETERl-MfT
(
/STARTER
SW.
F-4
/
DATA
LINK
I
d .
'v_AR__
FUEL
PUMP
CONNECTOR~
!P
~;~·
/~
,,
1-9
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8-56 CHASSIS ElECTRICAl
STARTER SWITCH NOTE:
Refer
to START AND CHARGING in this section. For relay
removal, refer to "Connector H ndling" ~
under "NOTES FOR WORKING ON ELE TRICAL .,..........
DATA LINK CONNECTOR ITEMS" in this section.
The data
link connector (white) is used to retrieve the
diagnostic
trouble codes stored from the engine UPSHIFT-1 RELAY
control module. The data link connector is installed at .----------------+----.
inside of the instrument panel driver lower cover.
(Fig. 8-72)
Fig. 8-72
FUEL PUMP RELAY
ENGINE CONTROL MODULE MAIN
RELAY
,-------,
"" __!.___./, ' 4 '<)I ~
~! Q)__l__1__j" ' L _____ _j
Fig. 8-73
~ INSPECTION
Check to see if there is any continuity between
the
relay terminals. (Fig. 8-73)
Replace the relay when the result of inspection
is found
abnormal.
®-@ · · · · · · · · No continuity
(When battery voltage is applied between CD-@)
®-@ · · · · · · · · Continuity
m
:
Fig. 8-74
~ INSPECTION
ltgl Check to see if there is any continuity b tween
the
relay terminals. (Fig. 8-7 4)
Replace the relay when the result of ins ~
is found abnormal.
DIODE
Terminal No. 4 3
Connection A (±) 8
pattern 8 8 (±)
Fig.
8-75
..

8-58 CHASSIS ELECTRICAL
HEADLIGHT AND FOG LIGHT
GENERAL DESCRIPTION
The circuit consists of the headlight, fog light, lighting switch, dimmer·passing switch, fog light switc~, high­
beam indicator,
lighting relay, tail relay and fog light relay. When the lighting switch is turned on by s~tting it
at the headlight position, the lighting relay is activated to turn on the headlight. The optical axis oft he hE ad light
can be turned up or down by operating the dimmer switch while the head light is on.
The passing switch is independent
of the lighting switch, and the optical axis ofthe passing light can bE turned
up only while the switch lever is pulled up and held in this state.
When the fog
light switch is turned on while the headlight on at low-beam, the fog light relay is acti ated to
turn on the fog light.
OPERATION OF THE CIRCUIT
BATTERY(+)
FOG LIGHT RELAY .--*-----1--,
1.~---g I
~
Wr
FOG rG LIGHT! '!r_., SW ,
FOG LIGHT "ON" (Only when dimmer• passing SW is at LO position) BATTERY(+)
BATTERY(+)
h~
I.A ~I
LIGHTING RELAY "ON" (When lighting SW is
ICb
at
headlight position)
HEADLIGHT
~· LO-HI
I
DIMMER• LO HI PASSING SW
I
.-~ ~J I I
I I
§D ~_. o ¢:!]
~-~ bt I I I I
I I 0 r--~: _____ ------
o;[X]E 0 o----~
r----------------
OFF
LIGHTING sw (HEADLIGHT
POSITION)
NOTE:
Arrow marks "c::::::>" indicate the direction of current
Fig. 8-77
J •

::!! CQ 00 I ....... 00
(
HEADLIGHT
HIGH
BEAM
INDICATOR
LIGHT
(METER)
RELAY:
FOG
LIGHT
RELAY
& FUSE
BOX

(FL-1,
F-4,
F-5, F-8,
F-12)
RELAY:
TAIL
"' "
.
RELAY:
LIGHTING
'"~
'
HEADLIGHT
(RH) FOG
LIGHT
(RH)
(
COMBINATION
SW
"',,,
HEADLIGHT
(LH)
!,--
FOG
LIGHTSW
C-16
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