2007 ISUZU KB P190 Workshop Repair Manual

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Page 4081 of 6020

ISUZU KB P190 2007 Workshop Repair Manual TRANSMISSION CONTROL SYSTEM (AW30–40LE) 7A2-115

Step Action Value(s) YES NO
9 1. Reconnect all previously disconnected harness
connector(s).
2. Clear the DTCs with a scan tool.
3. Tur

Page 4082 of 6020

ISUZU KB P190 2007 Workshop Repair Manual 7A2-116 TRANSMISSION CONTROL SYSTEM (AW30–40LE)

DTC U2105 (Flash Code 67)

RTW 77AMF000801

Circuit Description
The automatic transmission control system in AW 30-
40LE uses high s

Page 4083 of 6020

ISUZU KB P190 2007 Workshop Repair Manual TRANSMISSION CONTROL SYSTEM (AW30–40LE) 7A2-117

(3) All of the following conditions are met.
• Device Control is not operating.
• Disable Normal Communication is receiving
enable.
•

TRANSMISSION CONTROL SYSTEM (AW30–40LE) 7A2-117

(3) All of the following conditions are met.
• Device Control is not operating.
• Disable Normal Communication is receiving
enable.
• DTC Clear is not operating.
(4) DTC U2104 is not detecting failure or not deciding failure.
Condition For Setting The DTC
Detection standard is met for 2.5 second continuously.
Detection standard:
If one or more ID sent from Engine Control Module
(ECM) is not completed receiving for 2 basic cycles
since last receiving completion.
Action Taken When The DTC Sets
• Throttle judgment on torque reduction control, line
pressure control at stationary status, line pressure
reduction control at gear change and line pressure
reduction control at garage. (Throttle opening 100%)
• Line pressure FULL output.
• Throttle judgment on gear change control (Throttle
opening 0%).
• No line pressure reduction control at gear change.
• No torque reduction control.
• No squat control.
• No slope control (keep mode).
• No L-up control.
• Control Engine rpm at 7000rpm (No inertia
calculation).
• Control actual torque at MAX.
• Control driver torque at MAX.
• Control engine coolant temperature at 80 °C (176 °F).
• No coast control.
• No 3rd Start mode control.
• No line pressure reduction control at garage.
• No output revolution sensor failure detection.
• No C-0 rev sensor failure detection.
• No selector position switch failure detection.
• No oil temperature sensor failure detection.
• No T/F Hi-Low SW failure detection (Execute T/F
judgment using only T/F-SW ).
• No speed mater signal failure detection.
• No throttle signal failure detection.
• No Engine torque signal failure detection.
• No engine coolant temperature signal failure
detection.
• No Engine revolution signal failure detection.
• No shift solenoid functional failure detection.
• No L-up solenoid functional failure detection.
• Cancel engine rpm condition of prerequisite of suppl
y
voltage failure detection.
• Control vehicle speed of speed meter at 0km/h.
• No torque reduction at stall.
• No cruise control.
• No warm up control.
• Check Trans “ON”.
• DTC stored.
• MIL request “ON”. (EURO 4 only)
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.
• Inspect the wiring for EMI (Electro-Magnetic
Interference). Check that all wires are properly routed
away from coil, and generator. Also check fo
r
improperly installed electrical options. W hen this test
is performed, turn “OFF” on electronic auto parts
switches to improperly for a noise preventing.

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ISUZU KB P190 2007

Page 4084 of 6020

ISUZU KB P190 2007 Workshop Repair Manual 7A2-118 TRANSMISSION CONTROL SYSTEM (AW30–40LE)

Circuit/System Testing DTC U2105

Step Action Value(s) YES NO
1
W as the On-Board Diagnostic (OBD) System Check
performed? — Go to
St

Page 4085 of 6020

ISUZU KB P190 2007 Workshop Repair Manual TRANSMISSION CONTROL SYSTEM (AW30–40LE) 7A2-119

Step Action Value(s) YES NO
9 1. Reconnect all previously disconnected harness
connector(s).
2. Clear the DTCs with a scan tool.
3. Tur

Page 4086 of 6020

ISUZU KB P190 2007 Workshop Repair Manual ON-VEHICLE SERVICE (AW30–40LE) 7A3-1
SECTION 7A3
ON-VEHICLE SERVICE (AW30–40LE)
TABLE OF CONTENTS

Service Precaution .................................................. 7A3-2
Diagnosis ...

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

BACK TO CHAPTER INDEX
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ISUZU KB P190 2007

Page 4087 of 6020

ISUZU KB P190 2007 Workshop Repair Manual 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

Page 4088 of 6020

ISUZU KB P190 2007 Workshop Repair Manual 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 t

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