transmission fluid ISUZU TROOPER 1995 Owner's Manual

7 A-42 AUTOMATIC TRANSMISSION (4L30-E)
LINE PRESSURE TEST
The line pressure test checks oil pump and control
valve
pressure regulator valve function. It will also
detect oil leakage.
Line Pressure Test Procedure:
1. Check the level of the engine coolant, the engine
oil, and the automatic transmission fluid.
Replenish
if required.
2. Block the wheels and set the parking brake.
3. Remove the pressure detection plug at the left
side of the transmission case.
Set pressure gauge, adapter
to the pressure
l"iC\1 detection plug hole. (Fig. 7 A-6a)
~ Gauge and adapter: J-29770-A
Fig. 7A-6a
LEVER ENGINE
MODE
POSITION
SPEED
NORMAL/POWER D,3,2, L IDLE
WINTER D IDLE
NORMAL/POWER REVERSE IDLE WINTER
NORMAL/POWER
D,3,2,L STALL SPEED
WINTER D STALL SPEED
NORMAL/POWER REVERSE STALL SPEED WINTER
4.
5.
6.
7.
8.
9.
10.
11.
Start the engine and allow it to idle until the
engine
coolant temperature reaches 70 -80°C
(158-176°F).
Hold
the brake pedal down as far as it will go.
Place the selector in the "D" range.
Note the pressure gauge reading
with the
engine
idling.
Gradually
push the accelerator pedal to the
floor. The throttle valve will be fully open.
Note the pressure gauge reading
with the
accelerator
pedal fully depressed.
NOTE:
Do not continuously run this test longer than 5
seconds.
Release the accelerator pedal.
Place
the selector in the "N" range.
Run the engine at
1,200 rpm for one minute.
This
will cool the transmission fluid.
12. Repeat Steps 7-11 for the "3", "2", "L", and
"R" ranges.
13.
Install a pressure detection plug to the
transmission case,
applying recommended
thread
locking agent (LOCTITE 242) or its
equivalent to thread
of plug. Make sure that
thread is cleaned before applying locking
agents.
14. Tighten the pressure detection plug to the
specified torque.
~~~ Torque N·mOb·ft) / 9-14 (7-10)
LINE
PRESSURE FORCE
MOTOR kPa PSI CURRENT
APPROX. 380 APPROX. 54.6 VARIABLE
320-360 46-52 0.9 -1.0A
470-520 68-76 0.9 -1.0A
1030-1110 150-161 0.1-0.2A
1030-1110 150-161 0.1-0.2A
1450-1570 210-227 0.1-0.2A
•

7 A-94 AUTOMATIC TRANSMISSION (4l30-E)
DIAGNOSTIC TROUBLE CODE (DTC) 31
SOLENOID 1-2/3-4 SHORT TO GROUND OR OPEN
This DTC flashes the CHECK TRANS indicator and
sets
the BACKUP MODE.
Circuit Description:
• The 1-2/3-4 solenoid is a simple ON/OFF solenoid
located
in the main case valve body. The
solenoid is the normally closed-type. In second
or third gear the Transmission Control Module
(TCM) energizes the solenoid to open a fluid inlet
port. When the port is open, fluid pressure
actuates the
shift valve.
•
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 solenoids and
the
supply voltage. The High side of the solenoid
is permanently supplied with voltage, except in
BACKUP
MODE or when ignition is OFF the HSD
is turned OFF.
• The TCM continually monitors the solenoid
connection to its Low Side Driver (LSD) for either
low or high voltage. The LSD is a circuit of the
TCM that acts as a switch between the solenoid
and ground. When the solenoid is commanded
ON the TCM is switching the solenoid to ground.
r----C-90 BRN/RED H-10
• There are two tests of the LSD: When the engine
is cranked (DTC82) and when the ignition is
turned ON (DTC31 ).
• When the ignition is turned ON, and before the
engine is cranked, the TCM activates the shift
solenoids (1-2/3-4, 2-3 and Band) to check for
short circuits or open circuits. To do so the gear
is set
to 4th, 3rd, 1st, 1st with band apply, 4th
with no HSD. Each one of the 5 tests requires
0.15 second. If the engine is cranked before the
end of all tests, the remaining tests are not done.
Diagnostic Aids:
• This Diagnostic is an electrical test done by the
TCM.
• Detection conditions:
CD The solenoid low side connected to TCM
terminal A2 is shorted to ground or open.
® The test is only done when ignition is ON.
® Engine Speed < 480 RPM (not cranked) and
Output Speed = 0 RPM.
@ The conditions need to be present for 0.15 to
1.03 second after ignition switch ON.
•
Action after the detection time: BACKUP MODE.
•
Recovery conditions: To recover, do an IGNITION
CYCLE.
I GROUND I A2 3(D)j,. M-7 ( 16
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SHIFT C-91
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I
CONTROL I I C12
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BLK/ORN
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L..---D1 TRANSMISSION
CONTROL MODULE
(TCM)
H-10 ( 10
~ --r ----r ----1----~ ~~~~~~~~ION
I I
1m4 rnH SHIFT SHIFT II SOLENOID II SOLENOID
-y
-_........_ __________
--41Clf M-7
II
SAND I APPLY SOLENOID I
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---.J
•

7 A-96 AUTOMATIC TRANSMISSION (4l30-E)
DIAGNOSTIC TROUBLE CODE (DTC) 32
SOLENOID 2-3 SHORT TO GROUND OR OPEN
This DTC flashes the CHECK TRANS indicator and
sets
the BACKUP MODE.
Circuit Description:
• The 2-3 solenoid is a simple ON/OFF solenoid
located in the main case valve body. The
solenoid is the normally open-type. When the
port is open, fluid pressure actuates the shift
valve. In first or second gear the Transmission
Control Module (TCM) energizes the solenoid to
close a fluid inlet port.
• 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 solenoids and
the supply voltage. The High side of the solenoid
is permanently supplied with voltage, except in
BACKUP
MODE or when ignition is OFF the HSD
is
turned OFF.
•
The TCM continually monitors the solenoid
connection to its Low Side Driver (LSD) for either
low or high voltage. The LSD is a circuit of the
TCM that acts as a switch between the solenoid
and ground. When the solenoid is commanded
ON the TCM is switching the solenoid to ground.
r---_ c-9o
BRN/BLK H-10
I GROUNDJ) (( A3 2
• There are two tests of the LSD: When the engine
is cranked (DTC82) and when the ignition is
turned ON (DTC32).
• When the ignition is turned ON, and before the
engine is cranked, the TCM activates the shift
solenoids (1-2/3-4, 2-3 and Band) to check for
short circuits or open circuits. To do so the gear
is set to 4th, 3rd, 1st, 1st with band apply, 4th
with no HSD. Each one of the 5 tests requires
0.15 second. If the engine is cranked before the
end of all tests, the remaining tests are not done.
Diagnostic Aids:
• This Diagnostic is an electrical test done by the
TCM.
• Detection conditions:
CD The solenoid low side connected to TCM
terminal A3 is shorted to ground or open.
@ The test is only done when ignition is ON.
@ Engine Speed < 480 RPM (not cranked) and
Output Speed = 0 RPM.
@ The conditions need to be present for 0.15 to
0.88 second after ignition switch ON.
•
Action after the detection time: BACKUP MODE.
•
Recovery conditions: To recover, do an IGNITION
CYCLE.
1(A) '1 M-7
,.... --r ----r ----
1 - -- -
AUTOMATIC I
I TRANSMISSION
I I
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I I
I BAND I APPLY I SOLENOID!
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( BRN/WHT (
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CONTROl I I C12 10
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BLK/ORN
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1-2/3-4 2-3
II
SHIFT
II
SHIFT
II SOLENOID SOLENOID
-"--------------..J
TRANSMISSION
CONTROL
MODULE (TCM)
•

7 A-98 AUTOMATIC TRANSMISSION (4L30-E)
DIAGNOSTIC TROUBLE CODE (DTC) 33
TCC HIGH SHORT TO PLUS OR OPEN
This DTC flashes 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.
(]) No malfunction which will disable the TCC:
DTC43, 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 is turned OFF the TCC
High Side is
turned OFF.
• The TCM continually monitors the solenoid
connection 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 OFF.
•
If this circuit is shorted to plus, the TCC solenoid
is constantly commanded ON (shifts can be firm).
In 1st gear the TCC is hydraulically OFF, whatever
the TCC solenoid position. This means that the
car can be driven even with the TCC shorted to
voltage. The engine could stall when the driver is
braking strongly, if the car is stopped when the
transmission is still in second gear with TCC
applied. Note: The 3-2
shifts are very firm.
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 voltage or open.
® The condition needs to be present for 0.13
second.
• Action after the detection time:
G) TCC is turned OFF.
® CHECK TRANS indicator turned ON.
•
Recovery conditions: To recover, do an IGNITION
CYCLE.
I - - - -C-91 BRN/BLU H-10
TOFlQU!;
I ? (( 4(A) J., M-6
I Cot!M:R'teR I I c7 15 I --1· -.-- - - ---. AUTOMATIC .. CLU'IrlilH I I S~NOib I I I TRANSMISSION
leoti~~~~ I . I I T()ftotJE
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{ I
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BLK/ORN ~
9
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1 GROUND I I C1 BLK/BLU : 5
1_--_,) 01 ( 1
TRANSMISSION
CONTROL MODULE (TCM)
•

7A-102 AUTOMATIC TRANSMISSION (4L30-E)
DIAGNOSTIC TROUBLE CODE
(DTC) 34
BAND APPLY SOLENOID SHORT TO GROUND OR OPEN
This DTC flashes the CHECK TRANS indicator and
sets the BACKUP
MODE.
Circuit Description:
• The band apply solenoid is a normally open
solenoid
which controls the flow of fluid for brake
band
application. The Transmission Control
Module (TCM) uses Pulse Width Modulation
(PWM) and changes the duty cycle to control the
solenoid. The
TCM turns the solenoid ON
(energized) and OFF (de-energized) at a constant
frequency. The length
of time the solenoid is
energized
during each ON/OFF cycle is called the
pulse
width. By varying or "modulating" the
pulse
width, the solenoid output pressure is
changed.
Since the solenoid is normally closed,
increasing the pulse width increases the duty
cycle and decreases the output pressure. PWM
control provides smooth band application
without an accumulator. The band is only
applied in first and second gears.
• In the event of an electrical failure (open), the
solenoid regulates at the
maximum oil flow (0%
duty cycle).
• 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 solenoids and
the
supply voltage. The High side of the solenoid
is
permanently supplied with voltage, except in
BACKUP
MODE or when Ignition is OFF the HSD
2{8)\l, M-7
r----C-90 BRN/YEL H-10 ( 12
is turned OFF.
• The TCM continually monitors the splenoid
connection
to its low Side Driver (LSD) for either
low or high voltage. The LSD is a circuit of the
TCM that acts as a switch between the solenoid
and
ground. When the solenoid is commanded
ON the TCM is switching the solenoid to ground.
• There are two tests of the LSD: when the engine
is cranked (DTC82) and
when the ignition is
turned ON (DTC34).
• When the ignition is turned ON, and before the
engine is cranked, the TCM activates the shift
solenoids (1-2/3-4, 2-3 and Band) to check for
short circuits or open circuits. To do so the gear
is set
to 4th, 3rd, 1st, 1st with band apply, 4th
with no HSD. Each one of the 5 tests requires
0.15 second. If the engine is cranked before the
end
of all tests, the remaining tests are not done.
Diagnostic Aids:
• This diagnostic is an electrical test done by the
TCM.
• Detection conditions:
CD The solenoid low side connected to TCM
terminal A9 is shorted to ground or open.
@ The test is only done when ignition is ON.
@ Engine Speed <480 RPM (not cranked) and
Output Speed= 0 RPM.
® The condition needs to be present for 0.15 to
0.75 second after ignition switch ON.
•
Action after the detection time: BACKUP MODE.
•
Recovery conditions: To recover, do an IGNITION
CYCLE.
: --r ----r ----
1-
- -: ~Z[;'~,~~ION
I 1'•1 ~~ If ~!FT . i '· !: J GROUND A9
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--~~---------~---~ >--------< I
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BAND APPLY C-91 BRNtWHT H-10
I SOLENOID ( CONTROL : C12 10
I .
: GROUND {
. BLK/ORN . ; C1 BLK/BLU :> 01 ..... ---J
H-11
TRANSMISSION
CONTROL
MODULE (TCM)
•

7A-110 AUTOMATIC TRANSMISSION (4L30-E)
DIAGNOSTIC TROUBLE CODE (DTC) 41
SOLENOID 1-2/3-4 SHORT TO PLUS
This DTC flashes the CHECK TRANS indicator and
sets
the BACKUP MODE.
Circuit Description:
• The 1-2/3-4 solenoid is a simple ON/OFF solenoid
located in the main case valve body. The
solenoid is the normally closed-type. In second
or third gear the Transmission Control Module
(TCM) energizes the solenoid to open a fluid inlet
port. When the port is open, fluid pressure
actuates
the shift valve.
• 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 solenoids and
the supply voltage. The High side of the solenoid
is permanently supplied with voltage, except in
BACKUP MODE or when ignition is OFF the HSD
is
turned OFF.
•
The TCM continually monitors the solenoid
connection to its Low Side Driver (LSD) for either
low or high voltage. The LSD is a circuit of the
TCM that acts as a switch between the solenoid
and ground. When the solenoid is commanded
ON the TCM is switching the solenoid to ground.
H-7
• There are two tests of the LSD: when the engine
is cranked (DTC82) and when the ignition is
turned ON (DTC41 ).
• When the ignition is turned ON, and before the
engine is cranked, the TCM activates the shift
solenoids ( 1-2/2-3, 2-3 and Band) to check for
short circuits or open circuits. To do so the gear
is set to 4th, 3rd, 1st, 1st with band apply, 4th
with no HSD. Each one of the 5 tests requires
0.15 second. If the engine is cranked before the
end of all tests, the remaining tests are not done.
Diagnostic Aids:
• This diagnostic is an electrical test done by the
TCM.
• Detection conditions:
CD The solenoid Low side connected to TCM
terminal A2 is shorted to plus.
@ The test is only done when ignition is ON.
@ Engine Speed < 480 RPM (not cranked) and
Output Speed = 0 RPM.
@ The condition needs to be present for 0.15 to
0.88 seGond after ignition switch ON.
•
Action after the detection time: BACKUP MODE.
•
Recovery conditions: To recover, do an IGNITION
CYCLE.
,.... BATTERY-1 C-90
I INPUT I ( A4 GRN/WHT I IGNITION I ? RED/GRN H-42 )) 8 I INPUT A7 II BRN/VEL H-10
I { I r"'
( 12 BRN/BLK I I GROUND I f A3 BRN/RED 2(~
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SHIFT& I
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SOLENOID I (
I _:oNTROL _I C12 10
·~ ciJr
SHifT . SHIFT
II II SOLENOID II SOLENOID
' y
-"--------------.J
•-::------ECM MAIN RELAY
>---=---=--~--< ~----3(-D-,1'1-- --"~ L -2(B,l M 7
r-- -r ----r -·---
1-- --
AUTOMATIC I
I TRANSMISSION
I I
I BAND 1 APPLY I SOLENOID I
I I
I I
TRANSMISSION
CONTROL MODULE (TCMI
•

7A-112 AUTOMATIC TRANSMISSION (4l30-E)
DIAGNOSTIC TROUBLE CODE (DTC) 42
SOLENOID 2-3 SHORT TO PLUS
This DTC flashes the CHECK TRANS indicator and
sets the BACKUP MODE.
Circuit Description:
• The 2-3 solenoid is a simple ON/OFF solenoid
located
in the main case valve body. The
solenoid is the normally open-type. When the
port is open, fluid pressure actuates the shift
valve. In first or second gear the Transmission
Control Module (TCM) energizes the solenoid to
close a fluid inlet port.
• 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 solenoids and
the
supply voltage. The High side of the solenoid
is permanently supplied with voltage, except in
BACKUP
MODE or when ignition is OFF the HSD
is turned OFF.
• The TCM continually monitors the solenoid
connection to its Low Side Driver (LSD) for either
low or high voltage. The LSD is a circuit of the
TCM
that acts as a switch between the solenoid
and ground. When the solenoid is commanded
ON the TCM is switching the solenoid to ground.
• There are two tests of the LSD: when the engine
is cranked (DTC82) and
when the ignition is
turned ON (DTC42).
• When the ignition is turned ON, and before the
engine is cranked, the TCM activates the
shift
solenoids (1-2/2-3, 2-3 and Band) to check for
short circuits or open circuits. To do so the gear
is set
to 4th, 3rd, 1st, 1st with band apply, 4th
with no HISD. Each one of the 5 tests requires
0.15 second. If the engine is cranked before the
end
of all tests, the remaining tests are not done.
Diagnostic Aids:
• This diagnostic is an electrical test done by the
TCM.
• Detection ~:onditions:
CD The solenoid Low side connected to TCM
terminal A3 shorted to plus.
® The test is only done when ignition is ON.
® Engine Speed < 480 RPM (not cranked) and
Output Speed = 0 RPM.
@ The condition needs to be present for 0.15 to
1.03 second after ignition switch ON.
•
Action after the detection time: BACKUP MODE.
• Recovery conditions: To recover, do an IGNITION
CYCLE.
•

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
•

7A-116 AUTOMATIC TRANSMISSION (4L30-E)
DIAGNOSTIC TROUBLE CODE (DTC) 44
BAND APPLY SOLENOID SHORT TO PLUS
This DTC flashes the CHECK TRANS indicator and
sets the BACKUP
MODE.
Circuit Description:
• The band apply solenoid is a normally open
solenoid which controls the flow of fluid for brake
band
application. The Transmission Control
Module (TCM) uses Pulse Width Modulation
(PWM) and changes the duty cycle to control the
solenoid. The TCM turns the solenoid ON
(energized) and OFF (de-energized) at a constant
frequency. The
length of time the solenoid is
energized
during each ON/OFF cycle is called the
pulse width. By varying or "modulating" the
pulse width, the solenoid output pressure is
changed.
Since the solenoid is normally closed,
increasing the pulse width increases the duty
cycle and decreases the output pressure. PWM
control provides smooth band application
without an accumulator. The band is only applied
in first and second gears.
• In the event of an electrical failure (open), the
solenoid regulates at the maximum oil flow (0%
duty cycle).
•
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 solenoids and
the
supply voltage. The High side of the solenoid
is permanently supplied with voltage, except in
BACKUP
MODE or when ignition is OFF the HSD
H-7
is turned OFF.
• The TCM continually monitors the solenoid
connection to its Low Side Driver (LSD) for either
low or high voltage. The LSD is a circuit of the
TCM
that acts as a switch between the solenoid
and ground. When the solenoid is commanded
ON the TCM is switching the solenoid to ground.
• There are two tests of the LSD: when the engine
is cranked (DTC82) and
when the ignition is
turned
ON (DTC44).
• When the ignition is turned ON, and before the
engine is cranked, the TCM activates the
shift
solenoids (1-2/3-4, 2-3 and Band) to check for
short circuits or open circuits. To do so the gear
is set
to 4th, 3rd, 1st, 1st with band apply, 4th
with no HSD. Each one of the 5 tests requires
0.15 second. If the engine is cranked before the
end
of all tests, the remaining tests are not done.
Diagnostic Aids:
• This diagnostic is an electrical test done by the
TCM.
• Detection conditions:
CD The solenoid Low side connected to TCM
termin.al A9 is shorted to voltage.
@ The test is only done when ignition is ON.
@ Engine Speed < 480 RPM (not cranked) and
Output
Speed = 0 RPM.
@ The condition needs to be present for 0.15 to
1.18 second after ignition switch ON.
•
Action after the detection time: BACKUP MODE.
•
Recovery conditions: To recover, do an IGNITION
CYCLE.
,... BATTERY-, C-90
I INPUT I? A4 GRN/WHT ·~-----BATTERY
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TRANSMISSION
CONTROL MODULE (TCMI
C12
RED/GRN
BRN/YEL
BRN/BLK
BRN/RED
BRN/WHT
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H-10 ( 10
•

7A-138 AUTOMATIC TRANSMISSION (4L30-E)
DIAGNOSTIC TROUBLE CODE (DTC) 82
SHIFT OR BAND APPLY SOLENOIDS FAULTY DURING DRIVING
This DTC flashes the CHECK TRANS indicator and
sets
the BACKUP MODE.
Circuit Description:
• The shift solenoids are simple ON/OFF solenoids
located in the main case valve body. The
solenoids are
normally closed or open-type.
Depending
on gear the Transmission Control
Module (TCM) controls the solenoids to open or
close a fluid inlet port. When the port is open,
fluid pressure actuates the shift valve.
• 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 solenoids and
the
supply voltage. The High side of the solenoid
is
permanently supplied with voltage, except in
BACKUP
MODE or when Ignition is OFF the High
Side Driver is turned
OFF.
• The Low Side Driver (LSD) is a circuit of the TCM
that acts as a switch between the solenoid and
ground. When the solenoid is commanded ON
the TCM is switching the solenoid to ground. The
TCM
continually monitors each solenoid
connection
to its Low Side Driver and to its High
Side Driver
for either low or high voltage.
• DTC82 is activated when the Shift High Side
Driver
or one of the Shift Low Side Drivers
senses a
short circuit or open circuit when the
engine is cranked, then when the car is driven.
DTC82 can be set
only when the TCM is
activating the solenoids in
with the problem
circuit.
• To know where the fault comes from, do
IGNITION CYCLE to use the TCM self-check of
solenoids when Engine is not cranked but
Ignition ON.
Diagnostic Aids:
• This diagnostic is an electrical test done by the
TCM.
• Detection conditions:
CD HSD or LSD is improperly ON.
@ The condition needs to be present for at least
0.15 sec:ond.
•
Action after the detection time: BACKUP MODE
•
Recovery conditions: To recover, do after
IGNITION CYCLE.
•