2007 ISUZU KB P190 Workshop Repair Manual

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Page 4425 of 6020

ISUZU KB P190 2007 Workshop Repair Manual TRANSMISSION CONTROL SYSTEM (JR405E) 7A2-141
d. If there is already stored in the scan tool, theexisting data is displayed on the screen. The
scan tool asks user to keep existing data “Keep
Data�

TRANSMISSION CONTROL SYSTEM (JR405E) 7A2-141
d. If there is already stored in the scan tool, theexisting data is displayed on the screen. The
scan tool asks user to keep existing data “Keep
Data” or “Continue” to request new vehicle
information from the TCM. If there is no data in
the scan tool, it will immediately start vehicle
identification.
e. Select the vehicle description by following the on-screen instructions based on stamped VIN
or affixed VIN plate on the vehicle.
f. During obtaining information, the scan tool is receiving information from all modules at the
same time. But only ECM information is
displayed on the screen.
g. Turn OFF all accessories and press “Okay”.
h. Verify that the correct VIN is displayed on the scan tool. If the VIN is incorrect or no VIN,
record the correct VIN.
2. Turn OFF the ignition.
3. Turn OFF the scan tool and disconnect from the vehicle.
4. Transfer the data from the terminal to the scan tool using the following procedure:
Notice: The TIS supports service programming with
the Tech 2 scan tool only.
a. Connect the scan tool to the terminal.
b. Launch the TIS application.
c. Select the Service Programming System at the main screen.
d. Highlight the following information on the Select Diagnostic Tool and Programming Process
screen, then click “Next”.
• Select Diagnostic Tool - Tech 2
• Select Programming Process - Identify whether an existing TCM is being
reprogrammed or a TCM is being replaced
with a new one
• Select ECU Location - Vehicle
e. Verify the connections on the Preparing for Communication screen, then click “Next”.
f. Verify the VIN on the Validate Vehicle Identification Number (VIN) screen, then click
“Next”.
Notice: If the TCM is replaced to new one, VIN does
not displayed. Input correct VIN reading from stamped
VIN or affixed VIN plate on the vehicle. If the TCM from
another vehicle is installed, input correct VIN by same
way.
g. Highlight Transmission on the Select SystemType screen, then click “Next”, if on-screen
instruction displayed.
h. Complete the following information based on the service ID plate on the Validate Vehicle
Data screen until “Next” is highlighted, then
click “Next”.
• Model • Model year
• Engine type
• Model designator
• Destination code
• Transmission type
i. Verify your selection on the Summary screen.
Notice: Refer to Service Bulletin and Description
column before service programming is performed if the
bulletins are listed along with the calibration files.
Notice: Select Cancel if you receive a message stating
that the calibration selected is already the current
calibration in the TCM and reprogramming with the
same download is not allowed.
j. Click “Reprog”.
k. The Transfer Data screen will appear until the progress bar reaches 100%.
5. Close the application and return to the TIS application selection screen after the download is
completed.
6. Turn OFF the scan tool and disconnect from the terminal.
7. Transfer the data from the scan tool to the TCM using the following procedure:
a. Install a scan tool.
b. Turn ON the ignition, with the engine OFF.
c. Select Service Programming System (SPS) > Program ECU.
d. Turn OFF all accessories and press “Continue”.
e. Programming in Process will appear until the progress bar reaches 100%.
Notice: Some warning lamp may turn ON or blink while
programming the TCM since communication between
the TCM and other modules are interrupted. Clear DTC
in any module after programming.
f. Press “Continue” and exit the program after thescan tool displays “Programming Was
Successful”.
8. Turn OFF the ignition.
9. Turn OFF the scan tool and disconnect from the vehicle.
Service Programming System (SPS) (Pass-
Thru Procedure)
Pass-Thru programming allows the scan tool to remain
connected to the terminal and to the vehicle throughout
the programming process. The vehicle must be in close
proximity to the terminal while using Pass-Thru.
1. Launch the TIS application.
2. Select the Service Programming System at the main screen.
3. Highlight the following information on the Select Diagnostic Tool and Programming Process screen,
then click “Next”:
• Select Diagnostic Tool-Select Pass - Thru

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ISUZU KB P190 2007

Page 4426 of 6020

ISUZU KB P190 2007 Workshop Repair Manual 7A2-142 TRANSMISSION CONTROL SYSTEM (JR405E)
• Select Programming Process - Identifywhether as existing TCM is being
reprogrammed or an TCM is being replaced
with a new one.
• Select ECU Locat

7A2-142 TRANSMISSION CONTROL SYSTEM (JR405E)
• Select Programming Process - Identifywhether as existing TCM is being
reprogrammed or an TCM is being replaced
with a new one.
• Select ECU Location - Vehicle
4. Complete all vehicle data on the Preparing for Communication/ Determine Vehicle screen until
“Next” is highlighted, then click “Next”.
5. Follow the instruction on the Preparing for Communication screen, then click “Next”.
Notice: In order to reduce the potential for signal loss,
the RS-232 cable should not be more than 25 feet long.
6. Verify the VIN on the Validate Vehicle Identification Number (VIN) screen, then click “Next”.
Notice: If the TCM is replaced to new one, VIN does
not displayed. Input correct VIN reading from stamped
VIN or affixed VIN plate on the vehicle. If the TCM from
another vehicle is installed, input correct VIN by same
way.
7. Highlight Transmission on the Select System Type screen, then click “Next”, if on-screen instruction
displayed.
8. Complete the following information based on the service ID plate on the Validate Vehicle Data
screen until “Next” is highlighted, then click “Next”.
• Model
• Model year
• Engine type
• Model designator
• Destination code
• Transmission type
9. Verify your selection on the Summary screen.
Notice: Refer to Service Bulletin and Description
column before service programming is performed if the
bulletins are listed along with the calibration files.
Notice: Select Cancel if you receive a message stating
that the calibration selected is already the current
calibration in the TCM and reprogramming with the
same download is not allowed.
10. Click “Reprog”.
11. The Transfer Data screen will appear until the progress bar reaches 100%.
Notice: Some warning lamp may turn ON or blink while
programming the TCM since communication between
the TCM and other modules are interrupted. Clear DTC
in any module after programming.
12. Close the application and return to the TIS application selection screen after the download is
completed.
13. Turn OFF the ignition.
14. Turn OFF the scan tool and disconnect from the vehicle.

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ISUZU KB P190 2007

Page 4427 of 6020

ISUZU KB P190 2007 Workshop Repair Manual TRANSMISSION CONTROL SYSTEM (JR405E) 7A2-143
Description and Operation
Transmission Identification Information
Legend1. Drive train type (UK020= 2WD/ UK021= 4WD)
2. Production calendar year (6=200

Page 4428 of 6020

ISUZU KB P190 2007 Workshop Repair Manual 7A2-144 TRANSMISSION CONTROL SYSTEM (JR405E)
The JR405E automatic transmission is electrically
controlled by a transmission control module (TCM).
There are four forward speeds and one reverse speed

7A2-144 TRANSMISSION CONTROL SYSTEM (JR405E)
The JR405E automatic transmission is electrically
controlled by a transmission control module (TCM).
There are four forward speeds and one reverse speed.
This JR405E automatic transmission employs a clutch
pressure direct control system (Direct Electronic Shift
Control: DESC) using duty cycle type solenoid valves,
which ensure high shift quality. This transmission also
has a learning function and constantly checks the time
of each clutch and brake required for the shift in order
to match this time with the target value for the optimum
shift. The TCM will automatically select the most
appropriate shift points and lock-up points depending
on the accelerator pedal opening, the vehicle speed
and the vehicle load. If any trouble arises in the speed
sensor, solenoid valve, etc., the fail-safe control
function is activated to keep the running performance.
The JR405E automatic transmission consists of the
torque converter, oil pump, input shaft, out put shaft,
planetary gears and valve body. The gear train consists
of two planetary gear sets and three multiple plate
clutches in combination with two multiple plate brakes
and a one-way clutch.
Transmission Component Description
Torque Converter
Legend
1. Pump impeller
2. Turbine runner
3. Stator
4. Converter front cover
5. One-way clutch
6. Torque converter clutch (TCC) piston
7. Torsion damper
The torque converter is a device for transmitting the
engine torque to the transmission. It transmits power by
means of oil when the lock up clutch is disengaged,
and by means of a lock up clutch when it is engaged. The torque converter is of the symmetrical, three-
element, single-stage, two-phase type. As shown in the
picture, the symmetrical three-elements refer to three
elements (components) consisting of impeller (1),
turbine (2) and stator (3) that are arranged
symmetrically. Single-stage means that there is only
one turbine as an output element; two-phase means
that the pump impeller acts as a torque converter when
the turbine speed is comparatively low, and as a fluid
coupling when the speed is high. Lock up refers to a
fixed state of the lock up clutch (=torque converter
clutch (TCC) inside the torque converter and thus
connects the engine directly to the transmission.
Oil Pump
Legend 1. Torque converter
2. Oil pump

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Page 4429 of 6020

ISUZU KB P190 2007 Workshop Repair Manual TRANSMISSION CONTROL SYSTEM (JR405E) 7A2-145
Legend1. Oil pump cover
2. Inner rotor
3. Outer rotor
4. Oil pump housing
The oil pump generating oil pressure is a small sized
trochoid gear type oi

Page 4430 of 6020

ISUZU KB P190 2007 Workshop Repair Manual 7A2-146 TRANSMISSION CONTROL SYSTEM (JR405E)
Low Clutch, High Clutch and Reverse Clutch
Legend1. Clutch
2. Clutch drum
3. Clutch piston
4. Clutch fluid pressure
5. Clutch chamber
6. Oil seal
7

7A2-146 TRANSMISSION CONTROL SYSTEM (JR405E)
Low Clutch, High Clutch and Reverse Clutch
Legend1. Clutch
2. Clutch drum
3. Clutch piston
4. Clutch fluid pressure
5. Clutch chamber
6. Oil seal
7. Lunrication circuit
8. Centrifugal balance chamber
9. Centrifugal cancel cover
10. Return spring 11. Piston check ball
The multi-plate clutch is composed of drive plates and
driven plates. By applying the oil pressure onto the end
surface of the plates, the clutch is engaged. The oil
pressure is adjusted with the spool valves according to
the signal from the TCM. All clutches use dish plates to
prevent uncontrolled operation of the clutches when
engaged, causing a shock. For the low clutch and high clutch (A), a centrifugal
balance chamber full of transmission fluid is provided to
offset the excessive oil pressure. This prevents clutch
drag caused by oil pressure generated by residual
transmission fluid due to the centrifugal force while the
clutch is racing (under no oil pressure).
For the reverse clutch (B), a piston check ball is used to
release the oil pressure. This prevents clutch drag
caused by oil pressure generated by residual
transmission fluid due to the centrifugal force while the
clutch is racing (under no oil pressure).
The solenoid valve in the valve body is driven based on
the shift signal from the TCM, it moves the shift valve,
thereby engaging the drive plate and driven plate
through the piston of each clutch. As a result, elements
of the planetary gear unit are combined. When the oil
pressure is removed, the piston returns to the original
position via the force of the return spring.
2-4 Brake and Low & Reverse Brake
The multi-plate brake is composed of drive plates and
driven plates. By applying the oil pressure onto the end
surface of the plates, the brake is engaged. The oil
pressure is adjusted with the spool valve according to
the signal from the TCM. All brakes use dish plates to
prevent uncontrolled operation of the clutches when
engaged, causing a shock.
The solenoid valve in the valve body is driven based on
the shift signal from the TCM, it moves the shift valve,
thereby engaging the drive plate and driven plate
through the piston of each brake. As a result, rotation of
each element of the planetary gear unit is fixed. When
the oil pressure is removed, the piston returns to the
original position via the force of the return spring.

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ISUZU KB P190 2007

Page 4431 of 6020

ISUZU KB P190 2007 Workshop Repair Manual TRANSMISSION CONTROL SYSTEM (JR405E) 7A2-147
Low One-way Clutch
Legend1. Sprag
2. Rotating direction
The low one-way clutch employs the sprag, which locks
the counterclockwise rotation of the fron

Page 4432 of 6020

ISUZU KB P190 2007 Workshop Repair Manual 7A2-148 TRANSMISSION CONTROL SYSTEM (JR405E)
Valve Body Assembly
Legend1. Oil filter
2. Pressure control (PC) solenoid valve
3. Low & reverse brake solenoid valve
4. High clutch solenoid valve
5.

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