stop start ISUZU TROOPER 1995 Service Manual

6E2-136 DRIVEABILITY AND EMISSIONS
CHART C-3
EVAPORATIVE EMISSION CANISTER PURGE VALVE CHECK
Circuit Description:
Evaporative emission canister purge is controlled by a solenoid that allows manifold and/or ported vacuum to
purge the canister when energized. The Engine Control Module (ECM) supplies a ground to energize the solenoid
(purge "ON"). The purge solenoid control by the ECM is turned "ON" or "OFF" under specific engine conditions.
The purge
solenoid is turned "ON" when all of the following conditions are met.
• Data link connector is ungrounded.
• Engine run time after start more than 20 seconds.
• Engine coolant temperature above 60°C.
• Vehicle speed is above 9 mile per hour.
Also, if the diagnostic test terminal is grounded with the engine stopped, the purge solenoid is energized (purge
"ON").
Test Description:
Numbers below refer to circled numbers on the diagnostic chart.
1. Check to see if the solenoid is opened or closed. The solenoid is normally de-energized in this step, so it
should be closed.
2. Checks to determine if solenoid was open due to electrical CKT problem or defective solenoid.
3. Completes functional check by grounding test terminal. This should normally energize the solenoid opening
the
valve which should allow the vacuum to drop (purge "ON").
Diagnostic Aids:
Make a visual check of vacuum hose(s). Check throttle body for possible cracked, or plugged vacuum block.
Malfunction
indicator lamp for possible mechanical problem.
EVAPORATIVE
EMISSION CANISTER
PURGE SOLENOID N.C.
L__ _____ WHT/RED -----;
ENGINE FUSE
BLKJYEL~ 15A ~
IGNITION
Fig. 6E2-88
ENGINE
CONTROL
MODULE (ECM)
EVAPORATIVE EMISSION
CANISTER
PURGE SOLENOID
CONTROL DRIVER
•

DRIVEABILITV AND EMISSIONS 6E2-137
CHART C-3
EVAPORATIVE EMISSION CANISTER PURGE VALVE CHECK
Q) • IGNITION "OFF"
• IGNITION "ON" ENGINE STOPPED. (DO NOT CRANK ENGINE BEFORE FOLLOWING STEPS BELOW).
• DISCONNECT THROTTLE BODY TO EVAPORATE EMISSION CANISTER PURGE SOLENOID VACUUM
HOSE FROM SOLENOID.
•
APPLY VACUUM (10" HYDRAGYRUM OR 34 kPa) TO SOLENOID.
SOLENOID SHOULD HOLD VACUUM. DOES IT?
~ $
• GROUND DIAGNOSTIC TEST TERMINAL. @ • DISCONNECT SOLENOID ELECTRICAL CONNECTOR. ® • VACUUM SHOULD DROP. • APPLY VACUUM TO
SOLENOID AS IN STEP 1. DOES IT? SOLENOID
SHOULD HOLD VACUUM. DOES IT?
I
$ $ $ $
• INSTALL VACUUM GAUGE • DISCONNECT SOLENOID CHECK FOR SHORT TO I FAULTY SOLENOID. J TO HOSE PREVIOUSLY ELECTRICAL CONNECTOR. BROUND IN WHT
/RED DISCONNECTED FROM
• CONNECT TEST LIGHT WIRE. IF CIRCUIT IS SOLENOID. BETWEEN HARNESS
OK,
ENGINE CONTROL
• START ENGINE. TERMINALS. TEST LIGHT MODULE IS FAULTY. •
STABILIZE ENGINE SPEED AT SHOULD LIGHT. DOES IT?
ABOUT 2500.
• MOMENTARILY SNAP
THROTTLE OPEN AND LET
$
RETURN TO IDLE.
~
VERIFY THAT ABOUT 10" HYDRAGYRUM (34 kPa) OF VACUUM IS AVAILABLE AT FAULTY PURGE I PROBE EACH HARNESS
EVAPORATE EMISSION
SOLENOID. TERMINAL WITH A TEST
CANISTER PURGE SOLENOID, LIGHT TO GROUND.
IS IT?
I I
$
$
LIGHT "ON" ONE LIGHT
"ON" BOTH I NO LIGHT J
I I
OPEN WHT/RED REPAIR SHORT I OPEN BLK/ I NO SEE "DIAGNOSTIC
WIRE OR TO VOLTAGE IN VEL PROBLEM ~~.ON FACING FAULTY ENGINE WHT/RED WIRE.
FOUND. p . CONTROL
MODULE.
CLEAR DIAGNOSTIC TROUBLE CODES AND CONFIRM "CLOSED LOOP" OPERATION AND NORMAL "CHECK ENGINE" MALFUNCTION
INDICATOR LAMP OPERATION.

7 A-24 AUTOMATIC TRANSMISSION (4l30-E)
MECHANICAL/HYDRAULIC DIAGNOSIS SYMPTOMS INDEX
rr PERFORM PRELIMINARY INSPECTION FIRST! , -
CHART SYMPTOMS PAGE
1
NO ENGINE START IN NEUTRAL OR PARK 7A-25
2
NO FORWARD GEARS IN ANY RANGE/NO REVERSE 7A-26
3
NO ENGINE BRAKE IN ANY RANGE 7A-27
4
POOR SHIFTING IN ALL GEARS (ALL HARSH OR ALL SOFT) 7A-28
Sa DELAYS IN DRIVE AND REVERSE 7A-29
5b DELAYS
IN REVERSE ONLY
6 DIAGNOSTIC TROUBLE CODE (DTC) 61 7A-30
7 HARSH 1-2
SHIFT 7A-31
8 HARSH 3-4
SHIFT
9a 3-2 DOWNSHIFT
COMPLAINT
9b HARSH SHIFT WHEN SHIFTING INTO "D" OR ACCELERATING 7A-32 FROM STOP
9c COASTDOWN HARSH SHIFT OR CLUNK AT 3-2 DOWNSHIFT
10 INTERMITTENT 4TH TO 2ND GEAR DOWNSHIFT AT STEADY SPEED 7A-33
11 ENGINE FLARE AT SHIFTING
DURING TURNING ONLY 7A-34
12 ENGINE FLARE DURING 1-2 OR 2-3 SHIFT
13 SHUDDER ONLY DURING TORQUE CONVERTER CLUTCH (TCC) APPLYING 7A-35
14
POSSIBLE CAUSES OF TRANSMISSION NOISE 7A-36
15a
POSSIBLE CAUSES OF LOW LINE PRESSURE 7A-37
15b
POSSIBLE CAUSES OF HIGH LINE PRESSURE 7A-38
16
POSSIBLE CAUSES OF TRANSMISSION FLUID LEAKS It 7A-39
= -NOTE:
Numbers with parenthesis on the following charts refer to Parts List at end of this ~n.
•

TECH1 OPERATING FLOW CHART
TECH1 START
IGNITION SWITCH ON
ISUZU 90-94
TRANSMISSION/ASS (YES)
(YES)
'
DISPLAY CAPTURED
OAT A FROM LAST (YES) SNAPSHOT?
(YES/NO)
(NO)
'
ISUZU 90-94
TRANSMISSION/ASS SELECT MODEL YEAR: 199?
(4)
'
SELECT MODEL: NHR, UT
MODEL YEAR: 1994 (YES/NO)
(NO)
'
SELECT MODEL: UBS(G), UC, UX
MODEL YEAR: 1994 (YES/NO)
(YES) t
STOP ENGINE TURN ON IGNITION (YES)
(YES)
'
SELECT ELECTRONIC DRIVE
TRAIN SYSTEM? (YES/NO)
(YES)
' SELECT BY YES i ,J.. *4L30E (DE)
(YES)
' WAITING FOR DATA ON 4L30E (DE)
'
COMPARE ISUZU
PART-NO
XXXXXXXX WITH CHART 3 (YES/NO) See CHART 3J)f"'"'"
page 2A +~.
__, -
AUTOMATIC TRANSMISSION (4L30-E) 7 A-53
MASTER CARTRIDGE
IS MISSING OR MALFUNCTIONING
SNAPSHOT MODE
TECH1 SEARCH
FORTC?
(YES/NO)
(NO)
'
BATIERY VOLTAGE 12.5 v BAROMETER SENSOR
0.45 BARO
(YES)
' NO TROUBLE CODES
SELECT MODE FO: OAT A LIST F1: NOT USED F2: TROUBLE CODE
rt ,J..)
SELECT MODE F3: SNAPSHOT F4: CLEAR CODES F5: ACTUATOR TEST
(i ,J..) ,
SELECT MODE F6: NOT USED F7: NOT USED F8: ECU CONTROL
(YES) ...
Trouble Code which occured
first is displayed.

7A-108 AUTOMATIC TRANSMISSION (4l30·E)
DIAGNOSTIC TROUBLE CODE (DTC) 37
TORQUE MANAGEMENT SERIAL LINE FAULTY
This DTC flashes the CHECK TRANS indicator and
sets the
BACKUP MODE.
Circuit Description:
• Torque Management is a function that decreases
the engine
torque during transmission shifts. To
do so the Transmission Control Module (TCM)
exchanges
information on a wire with the Engine
Control Module (ECM) that governs the Engine.
This
wire is the Data Link Connector which is also
used by the Scan tool to communicate with the
TCM and the ECM.
r----
I I
I I
I I
I ,_
I C-91
I SERIAL DATA I RED
ca
I I '-._....;
Diagnostic .Aids:
• This
Diagnostic is not an electrical test done by
the TCM but a test between different information
("logic test").
•
Detection conditions:
CD Torque~ control failure detected
® Each time a shift occurs with the Torque
Management active, the TCM sends a
message
to the ECM. If the ECM does not
acknowledge this message, the DTC is stored.
• Action after the detection time: BACKUP MODE
• Recovery Gonditions: To recover, do an IGNITION
CYCLE.
NOTE:
CD When connecting the TECH1 to the data link
connector, be sure to turn off the ignition
switch.
® Since the torque management exchanges
information between the TCM and the ECM at
all times, the DTC37 is sometimes detects in the
following condition.
However,
this is not an abnormal condition.
• When the engine stops while driving and then
it is restarted.
• When the battery voltage goes down
excessively and the engine does not start
again.
When DTC37 is detected in the above
conditions,
turn off the ignition switch, correct
the
abnormal condition and erase the trouble
code.
II L
C-2 ~--I
r I ---- ----<+tC2 I
I I I '-" t
I I II' BLK/BLU
LT GRN/BLU (~ C
4 I
I I
r I I
I
I
I 3 I 2 I 1 I
---I ENGINE
... ---J CONTROL
MODULE
TRANSMISSION
DATA LINK CONNECTOR (C:-9) (ECM) CONTROL
MODULE (TCM)
•

7A-150 AUTOMATIC TRANSMISSION (4L30-E)
WIRING DIAGRAM
L--<~o-~~~~~~--~~~----~~~----~~--------------~G"IW~------------C«-9_0--iA4
D16
30A
D12
GfY ---~:at--B-'li BfY G(Y H-7 ,...-..~., 4,' ~ ~
RELAY ~' ~:iO 1 [my_ STOP LIGHT
2 3 I CRUISE MAIN '..BRAKES '' L------•CRUISE CONTROL (4) - ---vy UNIT (8) D1
~2
8-11+~---f4
~ 81~ Q._ ("'~2
~ IG1 18~ ~ ST ACC en 8-11
C-91 D9
C1
ECM MAIN RELAY
X-f~ ~X~~2 8 II• FENDER R/W : - : RiG H-42 C-90 '-----t--t------+-------!:!Lll----------< • ~( r fl A7 2 4 8 L....{+--AS
C-8
~A
H-13 BfY BfY 3 7 3
L-+-JB~~I,_IG __ __....,~4-B(Y ECM(A61 1 3 WARNING BOX TRANSMISSION
~T'~5'-'1:D----H-+~2~5 LfY ~~~ ~K TRANS 1-,17 Hr7 :~ C-~1 C10 C::
0 ~
"' <( u :!?
'----~
"' ":' 0'> J:
IXl ~ a: ~
I~ A10 AJT OIL TEMP 2
8
A
2
LfY 1-9~ ~1-9 GR/W H;9 BiG C-90 89 1~ POW. : 8 ~3 , A9
- -~· PiG c(-A11 WIN. 7 19 INDICATOR LIGHT (METER) POWER & WINTER SWITCH
_,. POW. 8-30 ViR H-,>,7:;-----'V"-'iR.!..,_ ___ c<-~9-0-l B8 C15 II-v 3, :7 • BODY of~~ ~-o-WIN. 1 ,' ViG -----.+.,.,176 __ ____;;V.:..;iG=-----<+'-----1 B
6 CONTROL C16 ,4 ILLUMINATION~' ~ '~RELAY: TAIL (4) CONTROLLER(3) 2 -~ 5
ABS ~c~4----------------__yV:J..:!:!._/W ______________ ___:C<-~9:..::0-l B 10 CONTROL UNIT 16 CRUISE CONTROL
RiB H-8 C-43
4 RiB 5(D)
UNIT Q;·>-9------"G,_,Ri_,L_~:+--;-----'G""R""iL::,_ ___ c,-+-9-0----j 84
MODE SWITCH
IT-MISSION)
C-43
2(F) ~ ' 8(A), '
BACKUP LAMP
RiL
t
PiL
p
C-91 ( D7 : D6
B3
C14
C7
MODULE D14
: D5 : C5 ( D4 C6
B5
7(B)'
X-17-l-~J,-~L -v-: 6((:1§': :
r! -v-u-3tGi'', STARTER H-~..._:4---4r::J-Mo~-_B~;~;8 LJR C;~434--o-_,_-o---+---<·' L ---1 8 1 [::::J 2 15 4(H) u---~< 1 '
CRUISE CONTROL UNIT RELAY;A/C (4)
DB
(TCM) 812
A12
811
C8
....
'
Fig.7A·11 I
------------------------~~
•

CHASSIS ELECTRICAL 8-1
·SECTION 8
CHASSIS ELECTRICAL
'\f CAUTION: .
When fasteners are removed, always reinstall them at the same location from which they were removed.
If a fastener needs to be replaced, use the correct part number fastener for that application. If the correct
part number fastener is not
available, a fastener of equal size and strength (or stronger) may be used.
Fasteners that are not reused, and those requiring thread
locking compound, will be called out. The correct
torque
values must be used when installing fasteners that require it. If the above conditions are not
followed, parts or system damage could result.
CONTENTS
General Information .................................... 8-2
Notes for Working on Electrical
Items .................................................... 8-2
Symbols and Abbreviations ................. 8-8
Symbols ............................................ 8-8
Abbreviations ................................... 8-9
Parts for Electrical Circuit ..................... 8-10
Wiring ............................................... 8-10
Fuse .................................................. 8-11
Fusible Link ....................................... 8-12
Circuit Breaker ................................... 8-12
Relay ................................................. 8-12
Relay Specifications and
Configurations ................................ 8-13
Diode ................................................. 8-14
Connector ......................................... 8-15
Reading the Circuit Diagram ................ 8-17
Main Data and Specifications .................... 8-19
Bulb Specifications ................................ 8-19
Fuse,
Fusible Link and
Circuit Breaker Location ..................... 8-21
Fuse
Block Circuit .................................. 8-22
Reference Table of Fuse, Fusible
Link and Circuit Breaker ..................... 8-23
Relay Location ....................................... 8-27
Diode Location .......................................
8-28
Grounding Point .................................... 8-29
Reference Table ................................ 8-29
Location ............................................ 8-31
Cable Harness Routing .......................... 8-34
System Repair .............................................. 8-38
Start and Charging ................................ 8-38
Engine Control Module
(ECM) ................................................... 8-47
Headlight and Fog Light ........................ 8-58
Front Side Marker Light, Parking Light,
Taillight, License Plate Light and
Illumination Light .............................. 8-76
Stoplight and Rear Defogger .............. 8-92
Turn Signal Light, Hazard
Warning
Light, Cornering Light,
Backup
Light and Horn ..................... 8-106
Dome Light, Luggage room Light,
Courtesy Light, Map Light,
Seat Belt Switch and
Warning Buzzer ................................. 8-128
Power Door Lock ................................. 8-142
Power
Window .................................... 8-156
Cruise
Control ...................................... 8-172
Anti-Lock Brake
System (ABS) ........... 8-178
Rear
Wheel Anti-Lock Brake
System (RWAL) ................................. 8-185
Transmission
Control Module
(TCM) ................................................. 8-192
A/T Shift Lock ...................................... 8-200
Windshield
Wiper/Washer and
Rear
Wiper/Washer .......................... 8-205
Headlight wiper /washer ..................... 8-232
Audio, Auto Antenna,
Cigarette
Lighter and digital clock ... 8-246
Power Door Mirror ............................... 8-254
Anti-theft System ................................ 8-270
Meter and Warning/Indicator Light ... 8-288
A/T Shift Indicator ............................... 8-336
Heater and
Air Conditioning ............... 8-340
Sun
Roof ............................................... 8-346
Power Seat ........................................... 8-360
Seat
Heater .......................................... 8-37 4
Supplemental Restraint
System (SRS) -AIR BAG ................... 8-382

READING THE CIRCUIT DIAGRAM
In this manual, each system has its own parts location
illustration,
circuit diagram and connector list used in
the circuit diagram.
PARTS LOCATION: The parts location shows the
location of the parts CD and the connector® used in
each harness routing ® (fig. 8-40).
PARTS LOCATION
EBCM-,
RR ABS SPEED SENSOR (RHI "',~ M-11 ,,
C-39 M-12~'-, RELAY: UPSHIFT-2 ~
CHASSIS ELECTRICAL 8-17
CIRCUIT DIAGRAM: The circuit diagram shows the
powersupply@the load or loads® and the grounding
point(s)
® (Fig. 8-41 ).
CONNECTOR LIST: The connector configuration
shows
each connector's configuration (J) and the pin
number® (Fig. 8-42).
RELAY & FUSE BO~"'
7
~<-:;;;:~:~:_::0:;;::::'=l-\,.-..:._::::;;,...6
IFL-1, FL-2, FL-6, F-91 , "" ;;~~~~~~~;g~~k~
C-33
C-34
Fig. 8-40
STARTERSW
RR ABS SPEED SENSOR ILHI
C-94 DATA LINK CONNECTOR
GSENSOR
FUSE BOX IC-3, C-4, C-10, C-141
BRAKE SW IW/CRUISE CONTROL! STOPLIGHT SW (W/0 CRUISE CONTROL!
FRT ABS SPEED SENSOR ILHI

CHASSIS ELECTRICAL 8-21
FUSE, FUSIBLE LINK AND CIRCUIT BREAKER LOCATION
ooooo 112~12~1~1~1
00 E
EEr 00 ~
Relay & fuse box
SJOOO 7-6
I lw ;;::;~ Fuse box ~ ~
1l1~~ ~lff~UIH~Inll
w~ F-a FL-4 ~
00 FL·S~ r---, F-11 'l2~J1~ 1~1&11~11~1,\l~31hl1~1
0
0
FL-6 'F-i2
I' ~
\a~ a~;
0000
0000
I ~
l/
~
j
~/~/ e:;?' v II I / / .I / /
('-/ .
~~
-~-~;,a~ ~~ --.:_
~~~~ -
Relay & Fuse box Fuse box
Fuse
Fuse Fuse
No. Capacity Indication on label No. Capacity Indication on label No. Capacity Indication on label
F-1 --C-1 10A STARTER RELAY
C-14 15A STOP A!f CONT
F-2 10A 02 SENSOR HEATER C-2 15A (SEAT HEATER)
C-15 20A (AUDIO [8))
F-3
15A HORN HAZARD C-3 15A
TURN BACK C-16 10A CLOCK (8] ROOM
F-4
15A H/LAMP-LH C-4 10A ELEC.IGN. C-17 25A RR DEFOG
F-5
15A H/LAMP-RH C-5
15A FRTWIPER & C-18 20A (DOOR LOCK)
F-6 --WASHER C-19
25A BLOWER
F-7
- -C-6 10A RRWIPER & C-20 10A (AIR
CON)
F-8
15A (FRT.FOG) WASHER C-21 10A SRS-1
F-9 20A ABS C-7 10A (H/LAMP C-22 10A SRS-2
F-10
15A FUEL PUMP WIPER) C-23 lOA SRS-3
F-11 -
-C-8 15A ENGINE C-24 10A SRS-4
F-12
15A TAIL C-9 15A IGN. COIL CIRCUIT BREAKER
FUSIBLE
LINK
C-10 10A METER GAUGE
C/8-1 --FL-1 80A MAIN C-11 10A
(AUDIO IACC])
C/8-2 30A (P/W, P/S, S/R)
FL-2 50 A KEYSW MIRROR
FL-3 30A ECM C-12 20A CIGARETTE 02: Oxygen
FL-6 40A (ASS 4/WHEEL ONLY) C-13 10A (ANTI THEFT)
Fig. 8-44

8-22 CHASSIS ELECTRICAL
FUSE BLOCK CIRCUIT
GENERATOR -------------------~s~w~------------~~s~w~--~~~~ r- / B L 1------CHARGE SIGNAL &W _/
FL-1 80A .-----, B 11.'1 MAIN
+ Lt--
l£h
~----/ IG~----------~O~.$~B/V~-----------,
3W REL~HT1NG 1J ---'"~L 3
RELA~PUMP 4 1...---. 12 2 B/0
1.25 B/0
SW
3RJ8
5W
~~~·~ F-1 0 0 F-2 10A
I F-315A
F-8
0 0 F-7 0 0 F-81SA
F-920A
9;nlaool
I
Oz SENSOR HEATER
HORN HAZARD
H/LAMP-LH
H/LAMP-RH
(FRT. FOG)
lABS) -I ABS
I ,--------__:<;;:R·.:.:W.::..Acc·L;;:-1 ____ ----Jv F-10 1SA 2 810
I
~ECM RELAY; ECM MAIN ¢~,...,..J>--+2'-'RIW~_::2~1-o.....-<:>-f-·4.:._ __ _. ~J~CTOR
L...-_.ECM
FL-t 40A ABS 4/WHEEL ONLY
"
.... ...
SW
5W
3 8IY
F-11 0 0 F-1215A
~------' FUSE BOX
CIB-2 30A ~.,.;
C-110A :
C-215A
C-31SA
C-410A
I
J
FUEL PUMP
TAIL
P/W, PIS. SIR
STARTER RELAY
(SEAT HEATER)
TURN BACK
ELEC.IGN.
e-s
15A 1 ""'-.0---t-----+----il FRT WIPER & WASHER
"""' -
I 3W/G
C-810A '---f-+----+.:3.:BIR::::..+---¢""''-£>---i-----f-----jl RR WIPER & WASHER
ABS HYORAULIC UNIT
STARTERSW
FL-2 _JJ OFF
~ ...
..:..AKEYSW 3 W/B ay ' o.N". 3UB
~~--~--~,~------~-0 ~~IG~2Y-----------~ o-: ST 3W/B 81 -.,IG1
FUSE BOX
I
I g1~ 1 J'-:::s:R:s-:1 =I RELAY; STARTER
STARTER I r-
L~---'~-j.t 3 B/V
I I 3UB
sw
C-710A
~';::--~--~-'---~~~HI~LA~M~P~W~IP~E~R~l~~ C-81SA ""'-'>--1---...__---i ENGINE
C-111SA I J~======~l IGN. COIL (G)
C-10 10A
C-1110A
k'-1:>----t----t
~==~I
METER GAUGE
""''-£>---f----------1 (AUDIO[ACC)) MIRROR
C-12 20A
::...1310A I
C-141SA -r"\'-1)----f----t
C-15 20A L,-.
CIGARETTE
(ANTITHEFT)
STOP A/T CONT.
(AUDIO[ B))
C-1810A """"-'-.0---f----------t_j CLOCK[B) ROOM
L---+------------------------iB lt~;_ ~=~~~:~:~::~~~: C-17 2SA I
G1820A
RR DEFOG
= sw (DOOR LOCK) RELAY; HEATER &A/C .:._ __________________ .:.:3~W'-'---------------------~2to~.....-4 3UR C-19 2SA ...... BLOWER
A/C : AIR CONDITIONING ECM : ENGINE CONTIIOL MODULE 0, :OXYGEN ABS
:ANTI-LOCK
BRAKE BYBTEM
RWAL: REAR WHEEL ANTI-LOCK BRB : SUPPLEMENTAL RESTRAINT SYSTEM
C-20 10A (AIR CON)
Fig. 8-45
•