2007 ISUZU KB P190 service

TRANSMISSION CONTROL SYSTEM (AW30–40LE) 7A2-87

(5) Engine coolant temperature sensor is not detecting failure or not deciding failure.
(6) Engine revolution rpm is more than 600 rpm.
(7) Engine revolution sensor is not detecting failure o
r
not deciding failure.
(8) T/F condition is high.
(9) T/F Hi-Low SW is not detecting failure or not deciding failure.
(10) Output revolution sensor is not detecting failure o
r
not deciding failure.
(11) S1 solenoid is not detecting failure or not deciding
failure. (Electric failure)
(12) S2 solenoid is not detecting failure or not deciding
failure. (Electric failure)
(13) Selector position switch is not detecting failure o
r
not deciding failure.
(14) DTC U2104 is not detecting failure or not deciding
failure.
(15) DTC U2105 is not detecting failure or not deciding
failure.
(16) Input revolution sensor is not deciding.
(17) Throttle signal is not detecting failure or not
deciding failure.
(18) Not emergency mode.
(19) Engine torque signal is not detecting failure or not
deciding failure.
(20) Pressure control solenoid is not detecting failure o
r
not deciding failure.
(21) All of the following conditions are met.
• Device Control is not operating.
• Disable Normal Communication Service is receiving enable.
• DTC Clear is not operating.
Condition For Setting The DTC
The following conditions are detected two times or more
between ignition “ON” and ignition “OFF”.
2 second passed after gear change output.
• The TCM detects equivalent of 2nd gear ratio for 1 second in case of 1st gear output.
- The throttle position is more than 8% and less than 100%.
- The vehicle speed is more than 5 km/h (3 mph).

• The TCM detects equivalent of 3rd gear ratio for 1
second in case of 4th gear output.
- The throttle position is more than 8% and less than 100%.
- The vehicle speed is more than 5 km/h (3 mph).
Action Taken When The DTC Sets
• No input revolution sensor failure detection.
• MIL request “ON”. (EURO 4 only)
• Check Trans “ON”.
• DTC stored.
Conditions For Clearing The DTC
• The DTC can be cleared from the TCM history by
using a scan tool.
• The DTC will be cleared from history when the vehicle has achieved 40 warm-up cycles without a
failure reported.
•
After more than 1 second has elapsed after the
ignition key has been turned “ON”, short between
No.11 and No.4 (ground) of DLC (Data Link
Connector). Then, after 1 second, but within 6
seconds, discontinue shorting.
Diagnostic Aids
• Inspect the wiring for poor electrical connection at the TCM. Look for possible bent, backed out, deformed
or damaged terminals. Check for weak terminal
tension as well. Also check for a chafed wire that
could short to bare metal or other wiring.
Inspect for a broken wire inside the insulation.
• W hen diagnosing for a possible intermittent short o
r
open condition, move the wiring harness while
observing test equipment for a change.


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ISUZU KB P190 2007

7A2-90 TRANSMISSION CONTROL SYSTEM (AW30–40LE)

DTC P0962 or P0963 (Flash Code 35)




RTW 77ALF001501

Circuit Description
The pressure control solenoid is a PW M duty control
solenoid located in the valve body.
The pressure control solenoid is a TCM-controled
device used to regulate transmission throttle pressure
by energizing current from the TCM.
Condition For Running The DTC
All of the following conditions are met.
(1) All of the following conditions are met for 2 seconds or more continuously.
• The supply voltage is more than 10.2 volts and
less than 15.5 volts.
(2) Not emergency mode.
(3) All of the following conditions are met. • Device Control is not operating.
• Disable Normal Communication Service is
receiving enable.
• DTC Clear is not operating.
Condition For Setting The DTC
(1) All of the following conditions are met for 12.5
seconds or more continuously. (DTC P0962)
• 1 second or more passed after ignition short
failure detection condition is met or ignition short
failure is never detected after ignition “ON”.

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ISUZU KB P190 2007

ON-VEHICLE SERVICE (AW30–40LE) 7A3-1
SECTION 7A3
ON-VEHICLE SERVICE (AW30–40LE)
TABLE OF CONTENTS

Service Precaution .................................................. 7A3-2
Diagnosis ................................................................. 7A3-3
Basic Troubleshooting ........................................ 7A3-3
Manual Shifting Test ........................................... 7A3-9
Stall Test ............................................................... 7A3-9
Time Lag Test ...................................................... 7A3-10
Hydraulic Test ...................................................... 7A3-11
Road Test ............................................................. 7A3-12
Shift Point Chart and Lock-Up Point Chart ..........7A3-16
Shift Point Chart ................................................... 7A3-16
Lock-Up Point Chart ............................................ 7A3-17
Transmission Fluid Level and Condition ..............7A3-18
Inspection ............................................................. 7A3-18
ATF Replacement ................................................... 7A3-19
Inspection ............................................................. 7A3-19
Neutral Start Switch (Mode Switch) ......................7A3-20
Inspection ............................................................. 7A3-20
Removal ................................................................ 7A3-20
Installation ............................................................. 7A3-20
Brake Signal ............................................................ 7A3-21
Inspection ............................................................. 7A3-21
Input and Output Revolution Sensor ....................7A3-22
Inspection ............................................................. 7A3-22
Power and 3rd Start switch ....................................7A3-22
Inspection ............................................................. 7A3-22
Solenoid .................................................................... 7A3-23
Inspection ............................................................. 7A3-23
ATF Temperature Sensor ......................................7A3-24
Inspection ............................................................. 7A3-24

Select Lever ....................................................... 7A3-25 Remove or Disconnect .......................................7A3-26
Install or Connect ................................................ 7A3-26
Shift Cable .......................................................... 7A3-28 Remove or Disconnect .......................................7A3-28
Install or Connect ................................................ 7A3-29
Torque Specifications ......................................... 7A3-30
Transmission Control Module (TCM) ...................7A3-31
Removal ............................................................... 7A3-31
Installation ............................................................ 7A3-31
Shift Solenoid and Lock-Up Solenoid ..................7A3-32
Removal ............................................................... 7A3-32
Installation ............................................................ 7A3-33
Valve Body Assembly and Pressure Control Solenoid ................................................. 7A3-34
Removal ............................................................... 7A3-34
Installation ............................................................ 7A3-36
Rear Oil Seal (Adapter Housing, 4 ×4) ................. 7A3-37
Removal ............................................................... 7A3-37
Installation ............................................................ 7A3-37
Rear Oil Seal (Extension Housing, 4 ×2) .............. 7A3-38
Removal ............................................................... 7A3-38
Installation ............................................................ 7A3-38
Transmission Assembly .........................................7A3-39
Transmission and Associated Parts .................7A3-39
Removal ............................................................... 7A3-40
Installation ............................................................ 7A3-44
Major Components .............................................. 7A3-49





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7A3-2 ON-VEHICLE SERVICE (AW30–40LE)
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 UNNEEDED 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 o
r
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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ISUZU KB P190 2007

ON-VEHICLE SERVICE (AW30–40LE) 7A3-3
Diagnosis
Basic Troubleshooting
AW 30–40LE transmission, with Transmission Control
Module (TCM), differs from the Mechanical – Hydraulic
control type transmissions. Accordingly, its
troubleshooting procedure differs also.
Before troubleshooting an TCM, first determine whethe
r
the problem is electrical or mechanical. To do this, just
refer to the basic troubleshooting flowchart provided
below.

If the cause is already known, using the basic
troubleshooting chart below along with the
troubleshooting chart should speed the procedure.






F07R200005-X



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7A3-4 ON-VEHICLE SERVICE (AW30–40LE)
Troubleshooting Chart
Numbers are arranged in order of probability.
Perform inspections starting with number one and
working up.





A/T : Automatic Transmission


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ON-VEHICLE SERVICE (AW30–40LE) 7A3-5




A/T : Automatic Transmission



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ISUZU KB P190 2007

7A3-6 ON-VEHICLE SERVICE (AW30–40LE)




A/T : Automatic Transmission



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