2004 ISUZU TF SERIES circuit diagram

TRANSFER CONTROL SYSTEM 7D1-29

CIRCUIT DIAGRAM (4JA1-TC/4JH1-TC)

RTW 48AXF007101

7D1-30 TRANSFER CONTROL SYSTEM

CIRCUIT DIAGRAM (4JA1-L)


RTW 48AXF028601

TRANSMISSION CONTROL SYSTEM (AW30–40LE) (V6 3.5L) 7A2-1
TRANSMISSION
TRANSMISSION CONTROL SYSTEM (AW30–40LE) (V6 3.5L)
CONTENTS

Service Precaution .................................................
7A2-2
General Description ...............................................
7A2-2
Electronic Control Diagram ...............................
7A2-3
Transmission Control Module (TCM) (1/2) ......
7A2-4
Transmission Control Module (TCM) (2/2) ......
7A2-5
TCM Point Table .................................................
7A2-6
TCM Voltage & Resistance Check Sheet .......
7A2-7
Control System Diagram ....................................
7A2-9
Control and Functions ........................................
7A2-10
Gear Shift Control 3rd start ...............................
7A2-10
Mode Type ...........................................................
7A2-10
Mode Selection ....................................................
7A2-10
Comparison of mode ..........................................
7A2-11
3rd start Mode .....................................................
7A2-11
Backup Mode .......................................................
7A2-11
Functions of Input / Output Components ........
7A2-12
CAN bus systems in automatic transmission
control (AW30-40LE) ........................................
7A2-13
High speed CAN bus ..........................................
7A2-13
Diagnosis .................................................................
7A2-13
Electronic Diagnosis ...........................................
7A2-13
Check Trans Indicator ........................................
7A2-13
On Board Diagnostic Check ..............................
7A2-13
"Check Trans" Check .........................................
7A2-14
Tech 2 OBD Connection ....................................
7A2-17
Snapshot Display With TIS2000 .................. 7A2-23
Service Programming System (SPS)............. 7A2-27
OBD Diagnostic Management System ............
7A2-30
16 - Terminal Data Link Connector (DLC) ......
7A2-31
Clear DTC ............................................................
7A2-32
DTC Check ..........................................................
7A2-32
TCM Precaution ..................................................
7A2-32
Information On TCM ...........................................
7A2-32
TCM Diagnostic Trouble Codes ........................
7A2-33
DTC P0560 (FLASHING CODE 25)
System Voltage Error ...........................................
7A2-34

DTC P0602 (FLASHING CODE 63)
Transmission Control Module (TCM)
Programming Error ................................................
7A2-36
DTC P0705 (FLASHING CODE 17)
Transmission Range Sensor Circuit
Malfunction .............................................................
7A2-38
DTC P0712 (FLASHING CODE 15)
Transmission Oil Temperature Sensor
Circuit Low Input ....................................................
7A2-42
DTC P0713 (FLASHING CODE 16)
Transmission Oil Temperature Sensor
Circuit Hight Input ..................................................
7A2-45
DTC P0717 (FLASHING CODE 14)
Input Speed Sensor Signal Error .........................
7A2-48
DTC P0722 (FLASHING CODE 11)
Output Speed Sensor Signal Error .....................
7A2-51
DTC P0743 (FLASHING CODE 33)
Torque Converter Clutch Electrical .....................
7A2-54
DTC P0748 (FLASHING CODE 35)
Pressure Control Solenoid Electrical ..................
7A2-57
DTC P0753 (FLASHING CODE 31)
Shift Solenoid S1 Electrical ..................................
7A2-60
DTC P0758 (FLASHING CODE 32)
Shift Solenoid S2 Electrical ..................................
7A2-63
DTC P1767 (FLASHING CODE 67)
ECM CAN Invalid ...................................................
7A2-66
DTC P1790 (FLASHING CODE 61)
Transmission Control Module ROM
Checksum Error .....................................................
7A2-69
DTC P1791 (FLASHING CODE 62)
Transmission Control Module RAM
Error .........................................................................
7A2-71
DTC U2104 (FLASHING CODE 65)
CAN BUSS OFF ....................................................
7A2-73

TRANSMISSION CONTROL SYSTEM (AW30 –40LE) (V6 3.5L) 7A2-13

CAN bus systems in automatic
transmission control (AW30-40LE)
The automatic transmission control system in AW30-
40LE uses high speed CAN bus system .The individual
CAN bus systems are connected via two interfaces and
can exchange information and data. This allows control
modules that are connected to different CAN bus
systems to communicate.
High speed CAN bus
Transmission control modules in the vehicle that require
continuous, rapid communication are connected to the
high speed CAN bus. For example, the automatic
transmission is continuously notified of the current
engine load status. Since the automatic transmission
control module has to react immediately to load status
changes, rapid communication is required between the
engine control module and the automatic transmission
control module. The high speed CAN bus in the AW30-
40LE is designed as a two-wire CAN bus (twisted pair).
The wires are shielded and twisted. The transfer rate is
500 K baud.




RUW37ASF000401
Diagnosis
Electronic Diagnosis
How To Diagnose The Problem
1. To avoid incorrect diagnostics, this book needs to
be followed accurately. Unless stated, do not jump
directly to a section that could contain the
solution. Some important information may be
missed.
2. The sections in CAPITALS and bold are the main
sections that can be found in the contents.
3. The go to “
SECTION"
means to continue to check
going to the “section".
4. The go through “
SECTION"
means to go through
the “section" and then to go back to the place the
go through was written.
5. BASIC ELECTRIC CIRCUITS:
You should understand the basic theory o
f
electricity. This includes the meaning of voltage,
amps, ohms, and what happens in a circuit with an
open or shorted wire. You should also be able to
read and understand wiring diagrams.
Check Trans Indicator
Find CHECK TRANS indicator and verify if it is
A. Flashing: Go to DIAGNOSTIC CHECK.
B. Staying on: Go through CHECK TRANS CHECK
.
C. Is never ON when the ignition key is turned on: Go through CHECK TRANS CHECK
D. Is ON during 3 seconds at ignition but OFF after: Normal operation. No DTC or malfunction.



RTW37ASH000401
On Board Diagnostic Check
This test determines if the transmission or its input or
output connections or sensors are failing.
1. Connect the Tech 2: Go through Tech 2 OBD
CONNECTION .
2. Turn on the ignition but not the engine.
3. Push “F0" on Tech 2 to see the Diagnostic Trouble
Code (DTC):

ON-VEHICLE SERVICE (AW30 –40LE) 7A3-15

Measure Line Pressure
1. Fully apply the parking brake and chock the four
wheels.
2. Start the engine and check idling rpm.
3. Shift into “D" range, step down strongly on the brake
pedal with your left foot and, while manipulating the
accelerator pedal with the right foot, measure the
line pressures at the engine speeds specified in the
table.
4. In the same manner, perform the test in “R" range.


Line pressure kPa (kg/cm2/psi) Engine
speed “D" range “R" range
Idling 323 – 382
(3.3 – 3.9/47 – 55) 500 – 598
(5.1 – 6.1/73 – 87)
Stall 1,137 – 1,274 (11.6–13.0/165–185) 1,499 – 1,833
(15.3–18.7/218–266)
Evaluation
1. If the measured values at all ranges are higher than
specified:

Pressure control solenoid defective
 Primary regulator valve defective
2. If the measured values at all ranges are lower than
specified:

Primary regulator valve defective
 Oil pump defective
 Pressure control solenoid defective
3. If pressure is low in “D" range only:

“ D" range circuit fluid leakage
4. If pressure is low in “R" range only:

“ R" range circuit fluid leakage
Road Test
NOTE: Perform the test at normal operation fluid
temperature (50 – 80 
C or 122 – 176 
F).
“D" Range Test in “NORMAL", and
“POWER" Pattern Ranges
Shift into the “D" range and hold the accelerator pedal
constant at the 50% and 100% throttle valve opening
positions.
Push in one of the pattern selector buttons and check
the following:

1. 1 –2, 2 –3, 3 –OD and lock-up, up-shifts should take
place, and shift points should conform to those
shown in the automatic shift diagram.


RUA370MH000101




RUA37ASH000101

7A1-2 CONSTRUCTION AND FUNCTION

PAGE
LOCK-UP CONTROL ..............................................................................................................7A1- 30
DIRECT ELECTRIC SHIFT CONTROL (DESC) ................................................................7A1- 31
LEARNING CONTROL ............................................................................................... 7A1- 33
MAJOR INPUT/OUTPUT COMPONENT AND THEIR FUNCTIONS .......................... 7A1- 34
CONTROL CIRCUIT BLOCK DIAGRAM .................................................................... 7A1- 35
GEAR TRAIN (TRANSMISSION MECHANISM) OPERATION AND
HYDRAULIC CIRCUIT ................................................................................................. 7A1- 36
CONSTRUCTION AND OPERATION ......................................................................... 7A1- 36
COMPONENT NAME AND FUNCTION ...................................................................... 7A1- 36
COMPONENT AND THEIR OPERATING CONDITION ............................................. 7A1- 37

CONSTRUCTION AND FUNCTION 7A1-35
CONTROL CIRCUIT BLOCK DIAGRAM



Speed sensor
Turbine sensor
Brake switch
Inhibitor switch
Power drive, 3rd start
switch
ATF oil thermo sensor
High clutch oil pressure
switch
2-4 brake oil pressure
switch
Low & reverse brake oil
pressure switch
Transfer control module
(4WD Only)



Engine Control Module
(ECM)
Line pressure solenoid
Low clutch solenoid
High clutch solenoid
2-4 brake solenoid
Low & reverse brake
solenoid
Lock-up solenoid
ATF temperature
indicator lamp
Speed meter (2WD
Only)
Power, 3rd start indicator
lamp
Check trans indicator
lamp
Data link connector Self-diagnosis
function



Transmission
Control
Module
(TCM)
4L mode
Engine
speed
Throttle
angle
Figure 54. Control Circuit Block Diagram

DIAGNOSIS (JR405E) 7A2-1
SECTION 7A2
DIAGNOSIS
TABLE OF CONTENTS
PAGE
BASIC TROUBLE SHOOTING..................................................................................................7A2-6
CHECK TRANS INDICATOR & SELF DIAGNOSIS..............................................................7A2-7
DIAGNOSIS WITH TECH 2........................................................................................................7A2-9
TECH 2 CONNECTION .................................................................................................. 7A2-9
TECH 2 OPERATING FLOW CHART (START UP)..............................................................7A2-10
TYPICAL SCAN DATA................................................................................................................7A2-13
MISCELLANEOUS TEST...........................................................................................................7A2-14
INTERMITTENT DIAGNOSIS....................................................................................................7A2-16
SNAPSHOT DISPLAY WITH TIS 2000....................................................................................7A2-17
SERVICE PROGRAMMING SYSTEM (SPS) ................................................................. 7A2-21
CIRCUIT DIAGRAM.....................................................................................................................7A2-24
PART LOCATION........................................................................................................................7A2-26
CONNECTOR LIST.....................................................................................................................7A2-31
DIAGNOSIS TROUBLE CODE TABLE...................................................................................7A2-33
FAIL-SAFE FUNCTION..............................................................................................................7A2-35
DTC P0722 (FLASH CODE 11) VEHICLE SPEED SENSOR NO SIGNAL......................7A2-36
DTC P0727 (FLASH CODE 13) ENGINE REVOLUTION SENSOR NO SIGNAL............7A2-38
DTC P0717 (FLASH CODE 14) TURBINE SPEED SENSOR NO SIGNAL......................7A2-40
DTC P0710 (FLASH CODE 15) ATF TEMPERATURE SENSOR FAILURE....................7A2-42
DTC P0560 (FLASH CODE 16) SYSTEM VOLTAGE FAILURE........................................7A2-43
DTC P0705 (FLASH CODE 17) INHIBITOR SWITCH FAILURE........................................7A2-44
DTC P1120 (FLASH CODE 22) THROTTLE SIGNAL FAILURE........................................7A2-46
DTC P1875 (FLASH CODE 25) GND RETURN CIRCUIT FAILURE.................................7A2-47
DTC P0753 (FLASH CODE 31) LOW & REVERSE BRAKE DUTY
SOLENOID FAILURE................................................................................................................7A2-48
DTC P0758 (FLASH CODE 32) 2-4 BRAKE DUTY SOLENOID FAILURE......................7A2-51
DTC P0763 (FLASH CODE 33) HIGH CLUTCH DUTY SOLENOID FAILURE................7A2-54
DTC P0768 (FLASH CODE 34) LOW CLUTCH DUTY SOLENOID FAILURE................7A2-57