ISUZU TROOPER 1995 Workshop Manual

CHASSIS ELECTRICAL 8-191
MEMO

8-192 CHASSIS ELECTRICAL
TRANSMISSION CONTROL MODULE (TCM)
GENERAL DESCRIPTION
The circuit consists of the starter switch, TCM, mode switch, brake switch, speed sensor, kick down switch,
Power and
Winter switches, Throttle Position (TP) sensor, Engine Control Module (ECM), barometer sensor,
adapter case, main case,
warning light (CHECK TRANS, NT OIL TEMP) and indicator light (WINTER DRIVE,
POWER DRIVE).
The TCM, based on the predetermined shifting characteristics and lockup operating valve, provides the
optimum shifting control to the varying vehicle running condition. The following input signals are sent to the
TCM: select lever position from the mode switch, running mode from the POWER & WINTER switches,
throttle opening from the TP sensor, vehicle speed from the vehicle speed sensor and engine speed from the
ECM are sent to the TCM. After receiving these signals, the TCM determines the vehicle running condition,
and
it sends output signals to each solenoid to control shifting.
When the
TCC solenoid is engaged, the lockup mechanism operates.
The shift
solenoid 2.3 and 1.2/3.4 selects the shift gear position.
The force
motor controls the line pressure to improve shifting.
Also, when the TCM detects an abnormal signal from the transmission or sensor, it will cause the "CHECK
TRANS"
light on the warning box to flash in order to inform the driver of the malfunction.
Refer to section 7 A "AUTOMATIC TRANSMISSION" for details.
•

, cE" 00 I I'J w 00

(
FRONT
CONSOLE
DIAGNOSIS
CONNECTOR
"~",
DATA
LINK
CONNECTOR,
·~
RELAY
& FUSE
BOX
(FL-1,
FL-2,
FL-3)
TPSENSOR H-42-
SPEED
SENSOR
ECM:
ENGINE
CONTROL
MODULE
ICM(CONT)
TCM:
TRANSMISSION
CONTROL
MODULE
TP
: THROTTLE
POSITION
ICM
: IGNITION
CONTROL
MODULE
~;
t I:;::==PI
v
/)
WARNING
BOX
' .
!I
/;;'
H-32
FUSE
BOX
(C-3,
C-4, C-8,
C-10,
C-14)
BRAKESW
KICKDOWNSW ACCELERATOR
PEDAL
BAROMETRIC
SENSOR
(
;g ~ en r-0 (") ~ 0 2
0 :::1: )> (I) (I) c;; m r­m ~ :;Q ~ co I .... (D w

8-194 CHASSIS ELECTRICAL
CIRCUIT DIAGRAM
+
I P~al ~~ ;71 BODY ENG. FRAME
5
~~ o-· 0"1 :;co s~
~~ gt::
i5 ~ ;I
~ :e :e "" ..: £!
ENGINE II M-16
DUCT II E·31 DOHC '
C-1 10A STARTER RELAY 0.85W/R 3 16A TURN, BACK
!i:
" ~~ ol!! 5! i5 0:
COMMON CHAMBER {
II r-8----------_LS9!:1~1_----------------------------_: !
::~ ___________ ;;:~'------------------------------------------------J 7
"' 0
10 H-26
WARNING
BOX
O.&W/R
0.86R/8
0.868/Y
~
~ !(!
~ 0
" ~ ""
FENDER·RH II C·39 1----------------------------------------------------'
Fig. 8-239
•

( ..
..
0 0 ~
~
x
~
--~~ ill ..
I
28
ILLUMINATION CONTROLLER
131
0.58
(TO PAGE
11-791
Nil~
I
'---"
1-11
~ ~s l!i ~~ -.. m i~ -z ;~ o., ~m
(
I
O.SV/W
E8CM
(161
(TO PAGE
11-1811
1
o.sGRJL
11:!;
~0u~~~~~~LUNITI21
I
O.SG
RELAY;
A/C COMPRESSOR
141
(TO PAGE
11-3421
0.58
...........
--~----~----------------------------------~~~~----~··~----~
ANTI-THEFT
CONTROLLER
(171
O.SL
(W/ANTI-THEFTI
,''
iTO PAGE
11-2721
4---------
-----
ECM
IC71
(TO PAGE
8-50,
52)
(
iii
(") :::t )> en en Ci5 m r­m (") -t ::I:J g r­eo I .... CD U'l

8-196 CHASSIS ELECTRICAL
CONNECTOR LIST
I B-1ol
'.( m ~
I B-261
-c(Q:)
,.....--J~ p
II~ ,.....,
•• .... AI AI .... ..... •• • .... .... •• ... It Ito 11111:1
'f'l-+
[IT] I C-181 I C-391 I C-431
~ ~!H~ re~ \1 8
I C-9ol I C-911
r--J
p
jl~ .....,
At A AJ .... At At'"' AI A12 .... .... • • ... . ... 11 112
f Ff
......JT2Jl_
4 3 2 1 ·~ 8 7 6 5 12 11 10 9
16 15 14 13
Fig. 8-240
•

CHASSIS ELECTRICAL 8-197
Fig. 8-241

8-198 CHASSIS ELECTRICAL
ENGINE CONTROL MODULE MAIN
RELAY
~ INSPECTION
1~1 Check to see if there is any continuity between
the relay terminals. (fig. 8-242)
Replace the relay when
the result of inspection
is
found abnormal.
®-@ ....... No continuity
(When battery voltage is applied between
G) and@)
®-@ ....... Continuity
Fig. 8-242
NOTE:
r-----~
®__1__/ o---!-@
I I CD I :
ill! ~ ' L _____ .J
For the relay removal, refer to "Connector Handling"
in the "NOTES FOR WORKING ON ELECTRICAL
ITEMS"
in this section.
•

CHASSIS ELECTRICAL 8-199
MEMO

8 -200 CHASSIS ELECTRIC'Al
A/T SHIFT LOCK
GENERAL DESCRIPTION
This circuit consists of the starter switch, stoplight switch (vehicle w/o cruise control), brake switch (vehicle
w/cruise control),
shift lock controller, stoplight, backup light and mode switch.
The shift lock system is designed not
to allow the shift lever to be shifted from the "P" position to any other
position
without depressing the brake pedal while the starter switch is turned on.
The solenoid pin at the
lower portion of the shift lever retracts when the brake pedal is not depressed, thus
causing the shift lever cam
to be locked by the link lever.
INTERNAL CIRCUIT OF SHIFT LEVER
J-1 JOINT CONNECTOR
SHIFT
LOCK
SOLENOID
B-32
PARKING POSITION
DETECTING SW
ILLUMINATION LIGHT
Fig. 8-243
SHIFT LOCK PARKING
SOLENOID POSITION
DETECTING
sw
JOINT CONNECTOR
CONTROLLER
SIDE
•