2007 ISUZU KB P190 check engine

Automatic Transmission – 4L60E – On-vehicle Servicing Page 7C4–47
14 Reconnect the fuel and EVAP pipes three brackets and clips, refer to 6C Fuel System – V6.
15 Reinstall the following components:
a Starter motor, refer to 6D1-2 Starting System.
b Transmission support, refer to 3.7 Transmission Support and Mount.
c Front and centre exhaust assemblies, refer to 6F Exhaust System.
d Rear propeller shaft and for 4WD front propeller shaft, refer to 4A Propeller Shaft.
16 Reconnect the harness connectors to the following: a Vehicle speed sensor, refer to 3.5 Vehicle Speed Sensor.
b Neutral start and back-up switch, refer to 3.4 Neutral Start and Back-up Lamp Switch.
c For the following on 4W D vehicles, refer to 7D Transfer Case and Adaptor Housing:
• neutral switch,
• 2WD – 4WD shift actuator switch,
• speed sensor.
17 Reinstall the selector cable to the transmission external manual shaft linkage, secure the selector cable to the bracket and attach the heat shield to the neutral start and back-up lamp switch, refer to 3.3 Selector Cable
Assembly.
18 Perform a reverse flush of the cooler lines and a flow rate test, refer to 2.2 Reverse Flush and Flow Rate, if either of the following applies:
• the transmission fluid is contaminated,
• the transmission has been replaced,
• the torque converter has been replaced, or
• the transmission oil pump has been replaced.
19 Lower the vehicle to the ground.
20 If required, top up the transmission fluid level (cold).
21 Reconnect the battery ground lead.
22 Start the engine and check for any fluid leaking at the fittings. If a leak is found, stop the engine and rectify the leak.
23 Road test until the transmission has reached operating temperature. Re-check the fluid level and for any fluid leaks, refer to 2.1 Transmission Fluid.
3.19 Transmission Control Module
Remove
1 Ensure the ignition switch is in the OFF position.
2 Disconnect the connector (1) from the transmission control module (TCM) (2) as follows, refer to Figure 7C4 – 63: a remove the securing pin (3),
b press the locking tab and swing the lever (4) to free the connector,
c remove the connector.
3 Remove the four bolts (5) and nuts (6), then the TCM from the mounting bracket (7).
4 If required, remove the two nuts (8) and the mounting bracket from the firewall.

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ISUZU KB P190 2007

TRANSMISSION CONTROL SYSTEM (AW30–40LE) 7A2-9
TCM Voltage & Resistance Check Sheet
CHECK ITEM PIN No. VALUE NOTE
VIGN C-94: 6–1 VIGN Key “ON”
Backup Power Supply C-94: 24–1 +B (Always) Key “ON”
Neutral Start Switch P “P” Position VIGN Key “ON”
Except “P” 0V
Neutral Start Switch R C-95: 1–C-94: 1 “R” Position VIGN Key “ON”
Except “R” 0V
Neutral Start Switch N C-95: 8–C-94: 1 “N” Position VIGN Key “ON”
Except “N” 0V
Neutral Start Switch D C95: 7–C-94: 1 “D” Position VIGN Key “ON”
Except “D” 0V
Neutral Start Switch 2 C-95: 19–C-94: 1 “2” Position VIGN Key “ON”
Except “2” 0V
Neutral Start Switch 1 C-95: 18–C-94: 1 “1” Position VIGN Key “ON”
Except “1” 0V
Neutral Start Switch 3 C-95: 9–C-94: 1 “3” Position VIGN Key “ON”
Except “3” 0V
Power SW C-95: 13–C-94: 1 “ON” 0V Key “ON”
“OFF” VIGN
3rd Start SW C-95: 4–C-94: 1 “ON” 0V Key “ON”
“OFF” VIGN
Brake SW C-95: 22–C-94: 1 “ON” VIGN Key “ON”
“OFF” 0V
AT Oil Temperature
Sensor C-94: 11–12 20
°C/68 °F 4.6V Engine run.
155°C/311 °F 1.1V
4L Signal C-95: 21–C-94: 1 4L 0V Key “ON”
2H/4H VIGN
Diag SW C-95: 12–C-94: 1 “ON” VIGN Key “ON”
“OFF” 0V
Shift Solenoid A (S1) C-94: 16–1 P VIGN Engine run.
R VIGN
N VIGN
D–1 VIGN
D–2 VIGN
D–3 0V
D–4 0V

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ISUZU KB P190 2007

7A2-10 TRANSMISSION CONTROL SYSTEM (AW30–40LE)
CHECK ITEM PIN No. VALUE NOTE
Shift Solenoid B (S2) C-94: 15–1 P 0V Engine run.
R 0V Engine run. (W ithout the
Reverse position lock out)
N 0V Engine run.
D–1 0V
D–2 VIGN
D–3 VIGN
D–4 0V
Lock-up Solenoid C-94: 5–1 “ON” VIGN (ex.) It is “ON” when the
vehicle speed is more than
65km/h.
“OFF” 0V
Check Trans Lamp C-95: 3–C-94: 1 “ON” 0V Key “ON”
(The lamp is “ON” for 3
second after key “ON”)
“OFF” VIGN
AT Oil Temperature Lamp C-95: 11–C-94: 1 “ON” 0V Key “ON”
(The lamp is “ON” for 3
second after key “ON”)
“OFF” VIGN
Power Lamp C-95: 2–C-94: 1 “ON” 0V Key “ON”
(The lamp is “ON” when the
Power switch is “ON”)
“OFF” VIGN
3rd Start Lamp C-95: 10–C-94: 1 “ON” 0V Key “ON”
(The lamp is “ON” when the
3rd Start switch is “ON”)
“OFF” VIGN
AT Oil Temp Sensor
Resistance C-94: 11–C-94: 12 20
°C/68 °F 12kΩ Key “OFF”
50°C/122 °F 1.5kΩ
155°C/311 °F 293Ω
Pressure Control Solenoid
Resistance C-94: 11–C-942 About

4–7
Ω(20 °C/68 °F)
Key “OFF”
Speed Sensor Resistance C-95: 5–C-95: 14 About 560Ω–
120
Ω(20 °C/68 °F)
Key “OFF”
Input Revolution Sensor
Resistance C-95: 6–C-95: 16 About 560Ω–

120
Ω(20 °C/68 °F)
Key “OFF”
Lock-up Solenoid
Resistance C-94: 5–C-94: 1 About 10Ω–

15
Ω(20 °C/68 °F)
Key “OFF”
Shift Solenoid A (S1)
Resistance C-94: 16–C-94: 1 About 10Ω–

15
Ω(20 °C/68 °F)
Key “OFF”
Shift Solenoid B (S2)
Resistance C-94: 15–C-94: 1 About 10Ω–

15
Ω(20 °C/68 °F)
Key “OFF”

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TRANSMISSION CONTROL SYSTEM (AW30–40LE) 7A2-13
Item Description
Reverse lock out control If the select lever is moved to "R" position during forward driving, the TCM prohibits
reverse driving by turn off the S1 and turn on the S2 for prevention of danger and
protection of the automatic transmission.
1. Enable condition a) Vehicle speed is more than 11km/h (7mph).
2. Disable condition a) Vehicle speed is less than 9km/h (6mph).
b) W hen except "R" position is detected.
Auto cruise mode control If the auto cruise control can’t keep the setting speed like a uphill driving, the TCM selects the auto cruise mode shift pattern for downshifting, thus keeping the vehicle
speed.
W arm-up mode control TCM selects the warm-up mode shift pattern in engine cold condition for improvement of drivability and facilitation of warm-up.
Squat control W hen the TCM detects N→D garage shift, the TCM controls 1-3-1 shift by setting
timer, in order to improve the shift feel at N →D.
Coast down control The TCM switches to the coast down control at the coasting, in order to reduce the
roughness of shifting.
Uphill control W hen the TCM detected uphill, the TCM automatically switches to the uphill mode
in two-stage in proportion to inclination pitch to prevent the busy shifting and to
obtain an enough torque.
Downhill control W hen the TCM detected downhill, the TCM automatically switches to the downhill
mode, and shifts to the 3rd or keeps in the 3rd in order to prevent the vehicle
acceleration. Then, the brake load is reduced by a moderate engine brake and fuel
consumption is improved by the fuel cut.
Line pressure control The TCM controls the impressed current of the pressure control solenoid based on the throttle opening, and regulates suitable throttle pressure.
Engine truque management
control The TCM controls engine torque for improvement of shift quality or durability under
the following conditions.
• Upshift and downshift
• Garageshift
Indicate driving mode function The TCM indicates the following driving mode on instrument panel.
• Power mode
• 3rd start mode
Indicate oil temperature
warning function If the transmission oil temperature sensor senses that transmission oil temperature
is greater than 146 °C (295 °F) , the TCM turns on ATF warning lamp. (The warning
lamp is turned off, if oil temperature is less than 126 °C/ 259 °F .)
Fail-safe function W hen trouble occurs to vehicle sensor and each solenoid, TCM automatically exerts
fail-safe control not to spoil driveability.
• This control is exerted when sensor or actuator is in trouble, while TCM works
normally.
• The "CHECK TRANS" light flashes to alert the driver, and the transmission
must be manually shifted as follows.

Select lever position Gear position
D 4 (Fourth)
3 4 (Fourth)
2 3 (Third)
L 3 (Third)
R Reverse
Shift are firmer to prevent clutch slip and consequent wear. The fault should be
corrected as soon as possible.

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ISUZU KB P190 2007

7A2-16 TRANSMISSION CONTROL SYSTEM (AW30–40LE)
CAN bus systems in automatic
transmission control (AW30-40LE)
The automatic transmission control system in AW 30-
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 module 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 AW 30-
40LE is designed as a two-wire CAN bus (twisted pair).
The wires are shielded and twisted. The transfer rate is
500 K baud.





RUW 37ASF000401
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 On-Board Diagnostic (OBD)
System 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.




RTW 77ASH000101



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TRANSMISSION CONTROL SYSTEM (AW30–40LE) 7A2-17
Normal





C07RY005-1
Abnormal






C07RY00042-1

On-Board Diagnostic (OBD) System 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 Operating.
2. Turn on the ignition but not the engine.
3. Push “F0” on Tech 2 to see the Diagnostic Trouble Code (DTC):
4. Do you have a DTC? YES: write down all code numbers and do the DTC
CHECK
NO: the DTC can not help you find the problem.
1. Go through “Check Trans” Check
2. If it is flashing and the flash is 0.4 seconds “ON”
and 0.4 seconds “OFF”, this means that you
should have a DTC stored. Please recheck go
to On-Board Diagnostic (OBD) System Chec
k
and if you find the same problem, replace the
Transmission Control Module (TCM).
“Check Trans” Check
1. Indicator is “ON” during 3 seconds at ignition but it
is “OFF” after the engine starts. The indicator is
working normally go to On-Board Diagnostic
(OBD) System Check .




RTW 77ASH000101


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ISUZU KB P190 2007

7A2-18 TRANSMISSION CONTROL SYSTEM (AW30–40LE)
Normal






C07RY005-1
2. Indicator is flashing and the flash is 0.4 seconds
“ON” and 0.4 seconds “OFF” always when ignition is
on (engine cranked or not). This means that there is
a malfunction. Go to On-Board Diagnostic (OBD)
System Check .
Abnormal






C07RY00042-1
3. Indicator is staying “ON” always when Ignition is
“ON”.
1. This means that connection between the lamp
and the indicator control unit is shorted to
ground.
2. Verify if instrument panel terminal 25 o
f
connector B–23 is shorted to ground.
3. Verify if the indicator control unit connector C–
95 terminal 3 is shorted to ground.
4. Verify that the instrument panel terminal 8 o
f
connector B–24 is connected to battery.
5. If a problem was solved: Go to Check Trans
Indicator .
NO: Replace Transmission Control Module
(TCM).
4. Indicator is staying “OFF” with the ignition “ON”
(engine “OFF”).
1. This means that connection between the lamp
and the indicator control unit is shorted to
battery or opened.
2. Verify if instrument panel terminal 25 o
f
connector B–23 is shorted to battery or open.
3. Verify if the indicator control unit connector C–
95 terminal 3 is shorted to battery or open.
4. Verify that the instrument panel terminal 25 o
f
connector B–23 is connected to battery. If not,
check the meter fuse and the connections
(terminal 2 of connector H–7) voltage.



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TRANSMISSION CONTROL SYSTEM (AW30–40LE) 7A2-23
Diagnostic Trouble Codes
The purpose of the “Diagnostic Trouble Codes” mode is
to display stored TCM trouble codes.
W hen “Diagnostic Trouble Codes” is selected an
“Application Menu” screen appears.
Read DTC Information
W hen “Read DTC Information” is selected, an
“Application Menu” appears with a list of DTC
information function keys addressing DTC specifics and
their origins.
Function key selections may vary for particular vehicle
and/or system.
Requested emission-related DTCs
Clear DTC Information
The purpose of the “Clear DTC Information” mode is to
command the clearing of stored TCM trouble codes.
W hen “Clear DTC Information” is selected, a “Clea
r
DTC Information”, warning screen appears. This screen
informs you that by cleaning DTC's, “all stored DTC
information in controller will be erased”.
Do you want to clear DTC's (Yes/No).
Press either the Yes or No key when answering.
After clearing codes, confirm system operation by test-
driving the vehicle.
Allow the vehicle to shift through all four forward gears
in a manner which attempts to repeat the failure
condition.
NOTE: W hen the trouble has not been repaired and
the trouble code cannot be erased, check the vehicle
again.
Data Display
The purpose of the “Data Display” mode is to
continuously monitor data parameters.
The current actual values of all important sensors and
signals in the system are displayed through F1 mode.
W hen “Data Display” is selected an “Application Menu”
appears. “Transmission Data Display”.
See “Transmission Data” on next page.
Snapshot
W hen “Snapshot” is selected an “Application Menu”
appears.
W hen “Transmission Snapshot” application is selected
from the “Application Menu”, a “Snapshot Menu”
appears, displaying several options. “Snapshot” options
may vary from one system to another.
“Snapshot” allows a recording of all vehicle parameters.
There parameters may then be replayed at a future
point in time.

This action allows you to focus on making the condition
occur, rather than trying to view all of the data in
anticipation of the fault. The snapshot will collect
parameter information around a trigger point that you
select.
W hen a snapshot is taken, it is recorded onto the
PCMCIA memory card. W hen the Tech 2 is powered
down. Snapshots are not lost.
Actuator Test
The purpose of “Actuator Test” mode is to check fo
r
correct operation of electronic system actuators.
Solenoid 2-3 Test, Solenoid 1-2/3-4 and Test TCC
Solenoid Test
You can operate the solenoids by pressing the “ON”
and “OFF” buttons.
Preconditions: P–N position, no vehicle speed, no
engine speed
Pressure Control Solenoid (PCS)
You can set desired PCS Current using the “ON” and
“OFF” button. The PCS Data informs about PCS
Current, Pressure and Duty Cycle.
Preconditions: P–N position, no engine speed, no
vehicle speed
3rd Start Lamp Test, Power Lamp Test, AT Oil
Temperature Lamp Test and Check Light Test
You can operate the lamps by pressing the “ON” and
“OFF” buttons.
Preconditions: none
NOTE: Freeze Frame
Freeze Frame is an element of the Diagnostic
Management System which stores various vehicle
information at the moment an emission-related fault
is stored in memory and when the Check Trans
Lamp is commanded on. These data can help to
identity the cause of a fault. Refer to Storing An
d
Erasing Freeze Frame Data for more detaile
d
information.


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