torque ISUZU TROOPER 1995 Workshop Manual

7A-100 AUTOMATIC TRANSMISSION (4L30-E)
DIAGNOSTIC TROUBLE CODE (OTC) 33
TCC HIGH SHORT TO PLUS OR OPEN
(CONTINUED)
CONTINUED FR~
PREVIOUS~E A
I
OPEN?
• Ignition switch OFF.
• Disconnect TCM connector C-90 and C-91.
• Connect ohmmeter between connector C-91 terminal C7 and C1 (TCM ground).
IF: Display is between 17.5 and 18.5 ohms.
• Disconnect transmission adapter case connector M-6. • Connect ohmmeter between terminal 4(A) of female half of
connector and transmission which is used as ground. IF: Display between 17.5 and 18.5 ohms:
• Wire between connector C-91 terminal C7 and
adapter case connector is open or shorted to another wire.
• Repair.
• Wire between adapter case connector and solenoid is open. • Or wire between transmission (ground) and
solenoid is open. • Repair.
TCC: Torque Converter Clutch TCM: Transmission Control Module •
Disconnect solenoid connector. • Connect ohmmeter between
the two solenoid
terminals.
IF: Display is between 17.5 and 18.5 ohms.
•

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)
•

AUTOMATIC TRANSMISSION (4L30-E) 7A-109
DIAGNOSTIC
TROUBLE CODE (DTC) 37
TORQUE MANAGEMENT SERIAL LINE FAULTY
• Peform TECH1 SELF-TEST GOTHROUGH TECH1 CONNECTION. IF: TECH1 OK:
• Ignition switch OFF. • Disconnect TECH1.
• Connect ohmmeter between connector C-9 terminal 3
and ground.
IF: Display approx. 0 ohms :
• Ignition switch ON.
• Connect voltmeter between Connector C-9 terminal 1
and 3.
IF: Display battery voltage:
• Ignition switch OFF. • Connect ohmmeter between connector C-9 terminal2 and ECM connector C-2 terminal C2. • Then connect ohmmeter between TCM connector C-91 terminal CB and ECM connector C-2 terminal C2. IF: Display approx. 0 ohms:
• Check for short between connector C-9 terminal 2
and ground and between terminal 2 and B+. IF OK, GOTO TCM MEM·CAL REPLACEMENT.
See TECH1 OPERATOR'S MANUAL
Check wire for open.
Check Engine Control
Module (ECM)
and wire
to ECM and connector C-9.

7A-114 AUTOMATIC TRANSMISSION (4l30-E)
DIAGNOSTIC TROUBLE CODE (DTC) 43
TCC HIGH SHORT TO GROUND
This DTC does NOT flash the CHECK TRANS
indicator and does NOT set the BACKUP MODE.
Circuit Description:
• The Torque Converter Clutch (TCC) solenoid is a
simple ON/OFF solenoid connected to the
adapter case
valve body. When the solenoid is
energized
by the Transmission Control Module
(TCM), it opens a fluid port. When the port is
open,
line pressure actuates the converter clutch
control valve
which engages the torque converter
clutch by exhausting the fluid. The TCM engages
the
torque converter clutch only when all of the
following conditions exist:
G) The transmission is at operating temperature.
@ The brake pedal is released.
® The transmission is operating in second, third
or fourth gear.
® The engine is warm (more than 70°C).
@ The shift pattern requests TCC apply.
® Shift finished.
(f) No malfunction which will disable the TCC:
DTC33, DTC55 (only short to ground).
• The solenoid is activated by a current. This
current is produced
by applying a voltage to one
side (the High side) and a
ground to the other
side (low side).
• The High Side Driver (HSD) is a circuit of the TCM
that acts as a switch between the solenoid and
the supply voltage. The High side of the TCC
solenoid is used to turn the TCC ON or OFF
because the Low side is permanently connected
to the ground of the transmission. In BACKUP
MODE or when ignition OFF the TCC High Side is
turned OFIF.
• The TCM continually monitors the solenoid
connection of to its High Side Driver for either
low or high voltage.
• There is only one test of the HSD for TCC: when
the engine is cranked and the TCC is turned ON.
Diagnostic .Aids:
• This diagnostic is an electrical test done by the
TCM.
• Detection conditions:
G) The solenoid High side connected to TCM
terminal C7 is shorted to ground.
@ The condition needs to be present for 0.07
seconds after ignition switch ON.
•
Action after the detection time: TCC is turned
OFF.
• Recovery eonditions: To recover, do an IGNITION
CYCLE.
r - - --, C-S1 BRN/BLU H-10 TORQUE I >-----__:_---<1 ~ ~'---------4-(A~) \1, M-6
g~~i~~TER I C7 II --1-- -- ---, AUTOMATIC
SOLENOID 1 TRANSMISSION
I
I
CONTROL
I I
I {I? GROUND I I C1 )
l---~ 01
TRANSMISSION CONTROL
MODULE (TCM)
I
: II
I
TORQUE CONVE:RTER CLUTCH
SOLEt\A0
I I H-11 - -~· - - - - - - -BLKJORN ~
9
-=-,5 BLK/BLU (
1
•

AUTOMATIC TRANSMISSION (4L30•E) 7A-115
IF you have a SCAN TOOL: TECH1?
$
DIAGNOSTIC TROUBLE CODE (OTC) 43
TCC HIGH SHORT TO GROUND
$
• Install scan tool: TECH1 GOTHROUGH TECH1 CONNECTION . I Without TECH1 you can not do preliminary test.
While driving the car in 2nd, 3rd or 4th gear check if the TCC is slipping or not when the TCC solenoid is commanded ON by the TCM.
Push FO: DATA LIST:
I Read TCC state and SLIP value.
CASE: SLIP
> 20 RPM with I CASE: DTC 33
I TCC =ON GOTO DTC33.
This means that the TCC valve is stuck OFF or the TCC solenoid connections are shorted to ground.
SHORT TO GROUND?
• Ignition switch OFF. Engine OFF .
• Disconnect Transmission Control Module ITCM) connectors C-90 and C-91.
• Connect a ohmmeter between connector C-91 terminal C7 and car ground or with TCM ground terminal C1.
IF: Short circuit:
~ $
The TCC is shorted to ground. I The problem is intermittent.
I GOTO INTERMITTENT CONDITIONS.
• Check wiring between terminal C7 and ground.
• Repair .
TCC: Torque Converter Clutch
TCM: Transmission Control Module
I

AUTOMATIC TRANSMISSION (4L30-E) 7 A-121
DIAGNOSTIC TROUBLE CODE (DTC) 51
ENGINE COOLANT SWITCH SHORT TO GROUND, PLUS OR OPEN
• This DTC can be set when there is no problem at
all. This is due to the fact that when the engine
stalls the ignition is still ON then Engine Control
Module (ECM) provides a false information:
engine cold. The Transmission Control Module
(TCM), knowing that the last ignition cycle
happened more than 20 minutes ago, then sets
DTC51.
• Check voltage between connector C-91 terminal 014 and connector C-91 terminal C1 (TCM ground). • Ignition switch ON. Engine ON. Engine warm. IF: Voltage higher than 5 volts:
•
There is a short circuit to voltage.
•
Repair.
• Using the Scan Tool you can check with TECH1:
FO: ENG. TEMP. SW information. When the
engine is
cold or when the engine is OFF the
TECH1 should show: COLD. When the engine is
warm the TECH1 should show WARM.
• This DTC is not very important. In the worst case
it would not allow the Torque Converter Clutch
(TCC) to be applied. This will cause low fuel
economy.
There is not currently a problem. GOTO INTERMITTENT CONDITIONS.
• This is an open circuit or the ECM is not sending the correct information. See also ECM information, SeetiQR 6E.
• Voltage approx. 0 volts means that the signal is OK or that
there is a short circuit to ground. • Repair.
There is
not currently a problem. GOTO INTERMITTENT CONDITIONS.
• Turn the engine OFF with the ignition ON. IF: The voltage goes back to 5
volts:
•
As the voltage is staying at 0 volts, there is a short to ground. • Repair.

7A-128 AUTOMATIC TRANSMISSION (4L30-E)
DIAGNOSTIC TROUBLE CODE (DTC) 55
BRAKE SWITCH SHORT TO GROUND OR OPEN
This DTC does NOT flash the CHECK TRANS
indicator and does NOT set the BACKUP MODE.
Circuit Description:
• The brake switch is a switch on the brake pedal
that is used to provide the information: brakes
are
applied. This is used by different features:
cruise control, stop
light and Transmission
Control Module (TCM).
•
The TCM uses the information (brakes applied)
mainly to release the Torque Converter Clutch
(TCC).
•
The brake switch input is constantly connected to
battery when the pedal is pressed. TCM terminal
D9 is connected to Voltage.
• The brake switch input is opened when the pedal
is released.
TCM terminal D9 is grounded.
r----
IBRAKESW I INPUT I
I I C-91 GRN/YEL H-7 I >-D9--~~~------~<
I II a
II
I GROUND I C1 I { }
I I >D1
I I
I I ._ ___ j
TRANSMISSION
CONTROL
MODULE (TCM) BLK!ORN
~-11
B~LU~q
Diagnostic
Aids:
• This Diagnostic is not an electrical test done by
the TCM but a test between different information
("logic test").
• Detection conditions:
CD Brake seen as applied during an acceleration
from less than 10 Km/h to more than 60 Km/h
within 6 seconds.
@ After this acceleration the vehicle speed was
higher than 60 Km/h during at least 6
seconds.
@ No Malfunction: Output Speed (DTC11 ).
Downshift Protection (DTC62).
@ The conditions need to be present for at least
5
times during an ignition cycle.
• Action after the detection time: No action but, as
the brake is seen as applied, the TCC is never
applied.
• Recovery conditions: To recover, brake has to be
released.
CRUISE CONTROL UNIT(8) RELAY
CRUISE MAIN (4)
BATTERY(+)
!'~~s:_ d B-14 ~ _ I _B-14 ~--<~~
2 L--_I 1
STOP LIGHT SW
•

7A-130 AUTOMATIC TRANSMISSION (4l30-E)
DIAGNOSTIC
TROUBLE CODE (DTC)·56
BRAKE SWITCH SHORT TO PLUS
This DTC does NOT flash the CHECK TRANS
indicator and does
NOT set the BACKUP MODE.
Circuit Description:
• The brake switch is a switch on the brake pedal
that is used to provide the information: brakes
are
applied. This is used by different features:
cruise
control, stop light and Transmission
Control Module (TCM).
•
The TCM uses the information (brakes applied)
mainly to release the Torque Converter Clutch
(TCC).
• The brake switch input is constantly connected to
battery when the pedal is pressed. TCM terminal
D9 is connected to Voltage.
•
The brake switch input is opened when the pedal
is released. TCM terminal D9 is grounded.
r----
IBRAKESW I INPUT I
I I C-91 GRN!YEL H-7 I lf~D-9--~~~------~~
I II I
I GROUND { 1 ?c1 II I >o1
I I
I I
.._ ___ J
TRANSMISSION
CONTROL
MODULE (TCM)
H-11
BLK!ORN sq
BLK!BLU ~
1
Diagnostic Aids:
• This Diagnostic is not an electrical test done by
the TCM but a test between different information
("logic test").
•
Detection conditions:
CD Brake seen as released during a deceleration
from more than 60 Km/h to less than 10 Km/h
within 6 seconds.
® Before this deceleration the car vehicle speed
was
higher than 60 Km/h during at least 6
seconds.
@ No Malfunction: Output Speed (DTC11).
Downshift Protection (DTC62).
@ The conditions need to be present for at least
5 times; during an ignition cycle.
•
Action atte~r the detection time: No action but, as
the brake is seen as released, the TCC is applied
even when the brake is applied.
•
Recovery conditions: To recover, brake has to be
released.
BATTERY(+)
,.------, d / '
GRN/YEL I /~;3 I ~-~3' I
~4 I I 1 I
STOP LIGHT <0---.Jr ~~l/ \3 1 ___ , 2/
' / ' BRAKE SW ,. .......... -----.......
CRUISE CONTROL UNIT(8) RELAY CRUISE MAIN (4)
BATTERY(+)
~~~R~s:_ d
·:.:-: ---~~~-14
2 L--_I 1
STOP LIGHT SW
•

AUTOMATIC TRANSMISSION (4L30-E) 7 A-145
TCM PRECAUTONS
The TCM can be damaged by:
(1) The Electrostatic discharge
(2) The short circuit of some terminals to voltage
or to ground.
Electrostatic Discharge Damage Description:
(1) Electronic components used to control systems
are often designed
to carry very low voltage,
and are
very susceptible to damage caused by
electrostatic discharge. It is possible for less
than 100 volts of static electricity to cause
damage
to some electronic components. By
comparison,
it takes as much as 4000 volts for
a person to even feel the zap of a static
discharge.
(2) There are several
ways for a person to become
statically charged. The most common methods
of charging are by friction and induction. An
example
of charging by friction is a person
sliding across a car seat, in
which a charge of
as much as 25,000 volts can build up.
Charging
by induction occurs when a person
with well insulated shoes stands near a highly
charged object and momentarily touches
ground. Charges for the same polarity are
drained off, leaving the person
highly charged
with the opposite polarity. Static charges of
either type can cause damage, therefore, it is
important to use care when handling and
testing electronic components.
NOTICE: To prevent possible Electrostatic
Discharge damage:
(1) Do not touch the TCM connector pins or
soldered components on the TCM circuit
board.
(2) When handling a Mem-Cal (PROM), do not
touch the component leads, and do not
remove integrated circuit from carrier.
(3) Be sure to follow the guidelines listed below if
servicing any of these electronic components:
(4) Do not open the replacement part package
until
it is time to install the part.
(5)
Avoid touching electrical terminals of the part.
(6) Before removing the part from its package,
ground the package to a known good ground
on the vehicle.
(7) Always touch a known good ground before
handling the part. This step should be repeated
before installing
the part if the part has been
handled
while sliding across the seat, while
sitting down from a standing position or while
walking some distance.
INFORMATION ON TCM:
(1) The Transmission Control Module (TCM) is
located in the
driver compartment and is the
control center
of the electronic transmission
control system.
(2) The TCM must be maintained at a temperature
below 185°F (85°C) at all times. This is most
essential if the vehicle is put through a paint
baking process. The
TCM will become in­
operative
if its temperature exceeds 85°C
(185°F). Therefore, it is recommended that the
TCM be removed or that temporary insulation
be placed around the
TCM during the time the
vehicle is in a paint oven
or other high
temperature process.
(3) The
TCM is designed to process the various
inputs and then respond by sending the
appropriate electrical signals
to control trans­
mission upshift,
downshift, shift feel and
torque converter clutch engagement.
(4) The TCM constantly interprets information
from the various sensors, and controls the
systems
that affect transmission and vehicle
performance. By analyzing operational prob­
lems, the
TCM is able to perform a diagnostic
function
by displaying DTC(s) and aid the
technician in making repairs.
PROM/MEM-CAL:
(1) Information for a specific engine and vehicle is
programmed using an integrated circuit called
a Programmable Read-Only
Memory (PROM).
It
is also called a MEM-CAL (Memory Cali­
brator). This allows one model of controller to
be used for many different vehicles. The
PROM is located inside the TCM and has
information on the engine, transmission,
calibration., etc. While one
TCM part number
can be used by many vehicle lines, a PROM is
more specific and must be used only with the
right vehicles. For this reason, it is very
important to check the latest parts book and
Service Bulletin
information for the correct part
number when replacing a PROM.

A4
D16
D9
C1
D1
D12
A7
AB
TRANSMISSION
A3 C10 C12
B9
A2
All A9 A10
BB C15
B6 C16
CONTROL
B3
B10 C14
C7
B4
D14
MODULE
D7 D6
D5
C5 D4 C6
B5
B12
(TCMI
A12 B11
DB
CB
AUTOMATIC TRANSMISSION (4l30-E) 7 A-151
WIRING DIAGRAM
DIAGNOSIS
CONNECTOR (C-921 C-91
1: : j
B/0 B
I
I B/L
C-91 BIR :
G9 BIR 18
C-90 BRIB )
C-91 ) BR!W
C-90
BRIR I
I BR/Y )
C-91 V/W
'
' VIR )
C-90 G/Y
C-91 GRIL ) '
' BRIL :
C-91 BR
C-91 UR
: B/W
C-90 LIB )
;&"
r-r ,7 ' '
' '
' '
rt' w ,6
' B '
1---+: 5
ENGINE BLOCK •I C-91 R v
BODY•I~
H-11 B/0
'::5 B/L
1
H-5 BIR
(( 5
J
II• ENGINE B LOCK
E-~1 GNITION
ONTROL
MODULE ( 4 c
TACHOMETER
H-10
BRIB 'I 2 I
,J BR!W
I BRIR 16, ' BR/Y (( 12
H-10
4 ~ VC:!:f._
,j VIR
' GIR 3, ' GRIL ,,'~ ' BRIL (( 15
H-7 ((1
---
'r
B/P
1
v
I
MAIN CASE M-71(1 IT-MISSION) /1 A -'m'-SHIFT SOLENOID: 2-3 I I 4(C
: 3(0 -'m'-SHIFT SOLENOID: 1-2 /3-4
:, 21B -'100"'--SOLENOID: BAND AP PLY
ADAPTER
CASE
M-6211 IT-MISSION) FORCE MOTOR I 2 B
~ : liE (PRESSURE REGULAT OR VALVE)
I : 31C rAAUr1 '-== : SID I :, 41A ~I•
uo
UR
B/W
H-5
E 1-5 2 ~9 LIO
'
OIL TEMPERATURES
SOLENOID:
TORQUE
C-1 ..---A9 C-1 A1 C-2 D6 C-2
.-----.£L HI .?
ENSOR
CONVERTER CLUTCH
ENGINE CONTROL
MODULE (ECMI
\,o LIR < 3 OUT THROTTLE P OSITION SENSOR (ENGINE) ; B/W
' 1 LO 11 B-~10 LIB B ( 2 1 ~) II• BODY
"] "" oow' ""''" 1 -
: SPEED SENSOR : (EXTENSION CASE I ' + 2 NOTE:
't]
CONNEC
C12
: C2 ECM
C4 TOR
NO. WIRE /COLOR
~90 BRIR
I 3 I 2 I 1 I DATA LINK CONNECTOR (C-91 / MALE FEMALE TERMINAL TERMINAL
Fig.
7A-11a