transfer case ISUZU KB P190 2007 Workshop Owner's Guide

7A2-26 TRANSMISSION CONTROL SYSTEM (JR405E)
Low & Reverse Brake Pressure Switch
This parameter displays the input state of the low &
reverse brake transmission fluid pressure (TFP) switch
to the TCM. When the low & reverse brake fluid
pressure is generated, the scan tool displays On.
2-4 Brake Solenoid Command
This parameter displays the 2-4 brake solenoid valve
control duty ratio based on the command from the
TCM. The scan tool will display a lower percentage
when the 2-4 brake is controlled to engage (fluid
pressure is applied to the 2-4 brake hydraulic circuits).
The scan tool will display higher percentage when the
2-4 brake is controlled to disengage (fluid pressure is
drained from the 2-4 brake hydraulic circuits).
2-4 Brake Pressure Switch
This parameter displays the input state of the 2-4 brake
transmission fluid pressure (TFP) switch to the TCM.
When the 2-4 brake fluid pressure is generated, the
scan tool displays On.
High Clutch Solenoid Command
This parameter displays the high clutch solenoid valve
control duty ratio based on the command from the
TCM. The scan tool will display a lower percentage
when the high clutch is controlled to engage (fluid
pressure is applied to the high clutch hydraulic circuits).
The scan tool will display higher percentage when the
high clutch is controlled to disengage (fluid pressure is
drained from the high clutch hydraulic circuits).
High Clutch Pressure Switch
This parameter displays the input state of the high
clutch transmission fluid pressure (TFP) switch to the
TCM. When the high clutch fluid pressure is generated,
the scan tool displays On.
Low Clutch Solenoid Command
This parameter displays the low clutch solenoid valve
control duty ratio based on the command from the
TCM. The scan tool will display a lower percentage
when the low clutch is controlled to engage (fluid
pressure is applied to the low clutch hydraulic circuits).
The scan tool will display higher percentage when the
low clutch is controlled to disengage (fluid pressure is
drained from the low clutch hydraulic circuits).
TCC Solenoid (Torque Converter Clutch)
This parameter displays the torque converter clutch
(TCC) control duty ratio based on the command from
the TCM. The scan tool will display a lower percentage
when the TCC is controlled to disengage (fluid
pressure is drained from the TCC release hydraulic
circuits). The scan tool will display higher percentage
when the TCC is controlled to engage (fluid pressure is
applied to the TCC apply hydraulic circuits). Transmission Fluid Temperature
This parameter displays the temperature of the
automatic transmission fluid (ATF) temperature as
calculated by the TCM using the signal from the
transmission fluid temperature (TFT) sensor. The scan
tool will display a low temperature when the signal
voltage is high, and a high temperature when the signal
voltage is low.
Transmission Oil Temperature Lamp
This parameter displays the commanded state of the
transmission oil temperature lamp control circuit. The
lamp should be On when the scan tool indicates
command On.
TCM Status Temp. (Temperature Transmission
Control Module)
This parameter displays the commanded state of the
high temperature mode shift map. On indicates the
transmission fluid temperature is high and the high
temperature mode is selected to prevent an
overheating.
4 Wheel Drive Low
This parameter displays the input state of the 4WD low
gear signal from the transfer case control module
(TCCM). When the 4L mode is selected, the scan tool
displays On.
TCM Status Transfer (Transmission Control
Module)
This parameter displays the commanded state of the
shift map that is based on the transfer case position.
High indicates the high mode (2H or 4H) is inputted
from the transfer case control module (TCCM). Low
indicates the low mode (4L) is inputted from the TCCM.
TCM Status Down Slope (Transmission Control
Module)
This parameter displays the commanded state of the
down slope mode shift map. On indicates the down
slope mode is selected under certain driving conditions.
TCM Status Up Slope (Transmission Control
Module)
This parameter displays the commanded state of the
up slope mode shift map. On indicates the up slope
mode is selected under certin driving conditions.
3rd Start Switch
This parameter displays the input state of the 3rd start
switch to the TCM. When the switch is pressed, the
scan tool displays On.
3rd Start Lamp
This parameter displays the commanded state of the
3rd start lamp control circuit. The lamp should be On
when the scan tool indicates command On.

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Section 7D Transfer House ............................................................................................ 4879 PAGE
Section 7D1 Transfer Control System.......................................................................... 4923
SECTION 7
TRANSFER CASE
TA BLE OF CONTENTS
TRANSMISSION

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TRANSFER CASE 7D-1
SECTION 7D
TRANSFER CASE
TABLE OF CONTENTS
PAGE
Service Precaution ......................................................................................................... 7D – 2
General Description ........................................................................................................ 7D – 3
On-Vehicle Service ......................................................................................................... 7D – 4
Transfer Case Oil Level ............................................................................................... 7D – 4
Transfer Case Oil Change ........................................................................................... 7D – 5
Transfer Case Front Oil Seal ...................................................................................... 7D – 6
Transfer Case Rear Oil Seal ........................................................................................ 7D – 9
Transfer Case Assembly ................................................................................................ 7D – 11
Transfer Case Assembly and Associated Parts ........................................................ 7D – 11
Removal ....................................................................................................................... . 7D – 12
Installation .................................................................................................................. .. 7D – 12
Transfer Control Unit ...................................................................................................... 7D – 16
Removal ....................................................................................................................... . 7D – 17
Installation .................................................................................................................. .. 7D – 17
Transfer Disassembly .................................................................................................... 7D – 18
Removal ....................................................................................................................... . 7D – 18
Inspection and Repair ................................................................................................. 7D – 27
Inspection and Repair (Transfer Case Assembly) .................................................... 7D – 27
Reassembly .................................................................................................................. 7 D – 31
Main Data and Specifications ........................................................................................ 7D – 41
Special Tools ................................................................................................................ 7D – 44


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7D-2 TRANSFER CASE
Service Precaution
WARNING: THIS VEHICLE HAS A SUPPLEMENTAL
RESTRAINT SYSTEM (SRS). REFER TO THE SRS
COMPONENT AND WIRING LOCATION VIEW IN
ORDER TO DETERMINE WHETHER YOU ARE
PERFORMING SERVICE ON OR NEAR THE SRS
COMPONENTS OR THE SRS WIRING. WHEN YOU
ARE PERFORMING SERVICE ON OR NEAR THE SRS
COMPONENTS OR THE SRS WIRING, REFER TO
THE SRS SERVICE INFORMATION. FAILURE TO
FOLLOW WARNINGS COULD RESULT IN POSSIBLE
AIR BAG DEPLOYMENT, PERSONAL INJURY, OR
OTHERWISE UNNECESSARY SRS SYSTEM
REPAIRS.
CAUTION: Always use the correct fastener in the
proper location. When you replace a fastener, use
ONLY the exact part number for that application.
ISUZU/GM will call out those fasteners that require a
replacement after removal. ISUZU/GM will also call
out the fasteners that require thread lockers or
thread sealant. UNLESS OTHERWISE SPECIFIED,
do not use supplemental coatings (Paints, greases,
or other corrosion inhibitors) on threaded fasteners
or fastener joint interfaces. Generally, such coatings
adversely affect the fastener torque and the joint
clamping force, and may damage the fastener. When
you install fasteners, use the correct tightening
sequence and specifications. Following these
instructions can help you avoid damage to parts and
systems.


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TRANSFER CASE 7D-3
General Description






RTW 57ALF000301
The transfer case is used to provide a means of
providing power flow to the front axle. The transfer case
also provides a means of disconnecting the front axle,
providing better fuel economy and quieter operation
when the vehicle is driven on improved roads where fou
r
wheel drive is not required. In addition, the transfer case
provides an additional gear reduction when placed in lo
w
range, which is useful when difficult off-road conditions
are encountered.
Use the 4W D switch on the center cluster panel to select
the drive range. The 4W D indicator lamp will be lit when
4W D is selected.



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7D-4 TRANSFER CASE
On-Vehicle Service
Transfer Case Oil Level

RTW 67DMF000101
Legend

(1) Transfer Case
(2) Filler Plug and O-ring

Removal
1. Disconnect the battery ground cable.
2. Rise and support the vehicle with suitable stands.
3. Remove the filler plug and O-ring.
4. Check the oil level reaches the filler hole.
5. If the oil level is low, fill the transfer oil (5W -30) o
r
equivalent to the transfer through the filler hole.

Installation

1. Replace the filler plug and O-ring tighten it to the
specified torque.
Filler plug torque: 39 N ⋅
⋅⋅
⋅
m (4.0 kgf ⋅
⋅⋅
⋅
m/29 lb ⋅
⋅⋅
⋅
ft)
2. Lower the vehicle to the ground.
3. Connect the battery ground cable.



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TRANSFER CASE 7D-5
Transfer Case Oil Change

RTW 67DMF000201
Legend

(1) Transfer Case
(2) Drain Plug and O-ring
(3) Filler Plug and O-ring

Removal

1. Disconnect the battery ground cable.
2. Rise and support the vehicle with suitable stands.
3. Place a suitable sized drain tray under the transfe
r
case.
4. Remove the drain plug and O-ring drain the transfe
r
case oil.
5. Remove the filler plug.

Installation

1. Replace the drain plug and O-ring to the transfer case
and tighten it to the specified torque.
Drain plug torque: 39 N ⋅
⋅⋅
⋅
m (4.0 kgf ⋅
⋅⋅
⋅
m/29 lb ⋅
⋅⋅
⋅
ft)
2. Fill the specified volume of the transfer oil (5W -30) o
r
equivalent to the transfer case through the filler hole.
Transfer oil volume: 1.3 lit. (1.37 US qt)
3. Replace the filler plug and O-ring tighten it to the specified torque.
Filler plug torque: 39 N ⋅
⋅⋅
⋅
m (4.0 kgf ⋅
⋅⋅
⋅
m/29 lb ⋅
⋅⋅
⋅
ft)
4. Lower the vehicle to the ground.
5. Connect the battery ground cable.



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7D-6 TRANSFER CASE
Transfer Case Front Oil Seal
Transfer Front Oil Seal and Associated Parts

RTW 67DMF000301
Legend
(3) O-ring
(1) Front Propeller Shaft (4) Output Flange
(2) End Nut (5) Front Oil Seal

Removal

1. Disconnect the battery ground cable.
2. Raise and support the vehicle with suitable stands.
3. Place a suitable sized drain tray under the transfe
r
case.
4. Remove the drain plug and drain the transfer case oil.
5. Remove the filler plug.
6. Remove the front propeller shaft.
7. Use a flange holder (5-8840-0133-0) to remove the end nut from the front output shaft then remove the
O-ring and the output flange.
8. Remove the front oil seal from the front cover.




RTW 77DSH000201

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TRANSFER CASE 7D-7
Installation
1. Thoroughly clean around the oil seal bore in the case
and ensure there are no burrs.
2.
Apply the engine oil to the new oil seal outer surfaces
and apply the recommended grease (BESCO L2) o
r
equivalent to the oil seal lip.
3. Tap the oil seal in to place, use an oil seal installe
r
(5-8840-2785-0) and a soft hammer.



RTW 77DSH000301
4. Install the output flange to the front output shaft.
5. Apply the engine oil to the new O-ring and install it to the front output shaft.
6. Secure the output flange with a flange holde
r
(5-8840-0133-0).
7. Install the new end nut and tighten them to specified torque.
Front coupling driver fixing nut torque: 137 N ⋅
⋅⋅
⋅
m (14.0 kgf ⋅
⋅⋅
⋅
m/101 lb ⋅
⋅⋅
⋅
ft)

8. Use a punch (5-8840-2293-0) to caulk the end nut.




226R300012




RUW 34DSH000301
Legend
(1) MAX 26mm (1.02in)
(2) MIN 4mm (0.16in)


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7D-8 TRANSFER CASE
9. Install the drain plug to the transfer case and tighten it
to the specified torque.
Drain plug torque: 39 N ⋅
⋅⋅
⋅
m (4.0 kgf ⋅
⋅⋅
⋅
m/29 lb ⋅
⋅⋅
⋅
ft)
Transfer oil volume: 1.3 lit. (1.37 US qt)
10. Install the filler plug and tighten it to the specified torque:
Filler plug torque: 39 N ⋅
⋅⋅
⋅
m (4.0 kgf ⋅
⋅⋅
⋅
m/29 lb ⋅
⋅⋅
⋅
ft)
11. Install the front propeller shaft.
Propeller shaft bolts torque: 59 N ⋅
⋅⋅
⋅
m (6.0 kgf ⋅
⋅⋅
⋅
m/43 lb ⋅
⋅⋅
⋅
ft)
12. Lower the vehicle to the ground.
13. Connect the battery ground cable.



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