ISUZU KB P190 2007 Workshop Repair Manual

TRANSMISSION CONTROL SYSTEM (AW30–40LE) 7A2-35
Clear DTC
NOTE: If you clear the DTC (Diagnostic Trouble
Codes) you will not be able to read any codes recorded
during the last occurrence.
NOTE: To use the DTC again to identify a problem, you
will need to reproduce the fault or the problem. This
may require a new test drive or just turning the ignition
on (this depends on the nature of the fault).
1. IF you have a Tech 2:
1. Connect the Tech 2 and perform the Tech 2
Operating.
2. Push “F1: Clear DTC Information” in the
Application Menu and answer “Yes” to the
question “Do you want to clear DTC's?”
a. W hen a malfunction still exists and the Tech 2 displays “AW 30-40 CODES NOT
CLEARED”. This means that the problem is
still there or that the recovery was not done.
Please go to DTC Check.
b. W hen a malfunction has been repaired and the recovery is done the Tech 2 displays
“AW 30-40LE CODES CLEARED”.
2. W hen you have no Tech 2, the storaged trouble
codes can be cleared by shorting the terminals
No.11 and No.4 or 5 (ground) of data link connecto
r
with a lead wire for 1 ∼ 6 seconds.
DTC Check
1. Diagnostic Trouble Codes (DTC) have been
identified by Tech 2.
2. You have written the list of the DTCs. The order o
f
the malfunctions has no meanings for this TCM.
Usually only one or two malfunctions should be set
for a given problem.
3. Check directly the DTCs you identified. The DTCs
are sorted by number. Refer to Diagnostic Trouble
Code (DTC) Identification in this section.
Self-diagnosis code (Flash code) display
• The stored trouble codes can be identified by
shorting the terminal No. 11 and No. 4 or No. 5
(ground) data link connector with a lead wire.

Indication Method:
1. Terminal No. 11 and No. 4 or No. 5 (ground) data
link connector are short circuited.
2. Turn the key switch to the ON position.
3. If no trouble code exists, the normal code (12) is
indicated repeatedly.
Data Link Connector Short Circuit






Flash Code Illumination Pattern


0.4 Sec 0.4 Sec
.
ON
OFF


3.2 Sec.
1.2 Sec.
3.2 Sec.


0.4 Sec 0.4 Sec
.
ON
OFF


3.2 Sec. 1.2 Sec. 3.2 Sec.


Self-diagnosis Start
Normal Code (12)
Trouble Code (32)


4. If several trouble codes have occurred at a time,
each code is indicated three times in numerical
order.

BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007

7A2-36 TRANSMISSION CONTROL SYSTEM (AW30–40LE)
Trouble Code Clear Method:
If you have Tech 2:
Follow the procedure "DIAGNOSIS WITH TECH 2" in
this manual.
If you have no Tech 2:
Remove ECM (B) fuse (10A) for at least 10 seconds
with the ignition switched off.

NOTE:
If you clear the DTC you will not be able to read an
y
codes recorded during the last occurrence.
To use the DTC again to identify a problem, you will
need to reproduce the fault or the problem. This ma
y
require a new test drive or just turning the key switch on
(this depends on the nature of the fault).



12141414323232
In case DTC 14 & 32 are stored:


TCM Precaution
The TCM can be damaged by:
1. The electrostatic discharge
2. The short circuit of some terminals to voltage or to
ground.
Electrostatic Discharge Damage Description: 1. Electronic components used to control systems are often designed to carry very low voltage, and
are very susceptible to damage caused b
y
electrostatic discharge. It is possible for less than
100 volts of static electricity to cause damage to
some electronic components. By comparison, it
takes as much as 4,000 volts for a person to even
feel the zap of a static discharge.
2. There are several ways for a person to become statically charged. The most common methods o
f
charging are by friction and induction. An example
of charging by friction is a person sliding across a
car seat, in which a charge of as much as 25,000
volts can build up. Charging by induction occurs
when a person with well insulated shoes stands
near a highly charged object and momentaril
y
touches ground. Charges for the same polarity are
drained off, leaving the person highly charged with
the opposite polarity. Static charges of either type
can cause damage, therefore, it is important to use
care when handling and testing electronic
components.
NOTE: To prevent possible electrostatic discharge
damage:
1. Do not touch the TCM connector pins or soldered
components on the TCM circuit board.
2. Be sure to follow the guidelines listed below i
f
servicing any of these electronic components:
3. Do not open the replacement part package until it is time to install the part.
4. Avoid touching electrical terminals of the part.
5. Before removing the part from its package, ground
the package to a known good ground on the
vehicle.
6.
Always touch a known good ground before handling
the part. This step should be repeated before
installing the part if the part has been handled while
sliding across the seat, while sitting down from a
standing position or while walking some distance.
Information On TCM
1. The Transmission Control Module (TCM) is located
in the place of a clutch pedal and is the control
center of the electronic transmission control system.



BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007

TRANSMISSION CONTROL SYSTEM (AW30–40LE) 7A2-37
2. The TCM must be maintained at a temperature
below 85 °C (185 °F) at all times. This is most
essential if the vehicle is put through a paint baking
process. The TCM will become inoperative if its
temperature exceeds 85 °C (185 °F). Therefore, it is
recommended that the TCM be removed or that
temporary insulation be placed around the TCM
during the time the vehicle is in a paint oven or othe
r
high temperature process.
3. The TCM is designed to process the various inputs and then respond by sending the appropriate
electrical signals to control transmission upshift,
downshift, shift feel and torque converter clutch
engagement.
4. The TCM constantly interprets information from the
various sensors, and controls the systems that
affect transmission and vehicle performance. B
y
analyzing operational problems, the TCM is able to
perform a diagnostic function by displaying DTC(s)
and aid the technician in making repairs.

BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007

7A2-38 TRANSMISSION CONTROL SYSTEM (AW30–40LE)
TCM Diagnostic Trouble Codes
The following table lists the diagnostic trouble codes supported by this vehicle application. If any DTCs not listed here
are displayed by a scan tool, the scan tool data may be faulty; notify the scan tool manufacture of any DTCs displayed
that are not included in the following table.

DTC Type
DTC No. Flash
Code DTC NAME
EURO 4Except
EURO 4
P0562 72 System Voltage Error (Low) E E
P0563 73 System Voltage Error (High) E E
P0602 63 Transmission Control Module (TCM) Programming Error E E
P0707 17 Transmission Range Sensor Circuit Open B D
P0708 17 Transmission Range Sensor Circuit Short B D
P0712 15 Transmission Oil Temperature Circuit Short
B D
P0713 16 Transmission Oil Temperature Circuit Open
B D
P0717 14 Input Speed Sensor Signal Error
B D
P0722 11 Output Speed Sensor Signal Error
B D
P0741 43 Torque Converter Clutch Stuck “OFF”
B F
P0742 53 Torque Converter Clutch Stuck “ON”
B F
P0746 45 Pressure Control Solenoid F/B Stuck
B D
P0751 41 Shift Solenoid S1 Stuck “OFF” B D
P0752 51 Shift Solenoid S1 Stuck “ON” B F
P0756 42 Shift Solenoid S2 Stuck “OFF” B F
P0757 52 Shift Solenoid S2 Stuck “ON” B F
P0962 35 Pressure Control Solenoid Circuit Open or GND Short B F
P0963 35 Pressure Control Solenoid Circuit Ignition Short B D
P0973 31 Shift Solenoid S1 Circuit GND Short B D
P0974 31 Shift Solenoid S1 Circuit Open or Ignition Short B D
P0976 32 Shift Solenoid S2 Circuit GND Short B D
P0977 32 Shift Solenoid S2 Circuit Open or Ignition Short B D
P1790 61 Transmission Control Module (TCM) ROM Checksum Error B D
P1791 62 Transmission Control Module (TCM) RAM Error B D
P2769 33 Torque Converter Clutch Circuit GND Short B D
P2770 33 Torque Converter Clutch Circuit Open or Ignition Short B D
P2773 75 Transfer 4L Switch Circuit GND Short B D
P2774 75 Transfer 4L Switch Circuit Open or Ignition Short B D
U2104 65 CAN BUS OFF
A C
U2105 67 Lost of Communication with ECM A C


BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007

TRANSMISSION CONTROL SYSTEM (AW30–40LE) 7A2-39

Diagnostic Trouble Code (DTC) Type
Definitions
Emission Related DTC
Action Taken When the DTC Sets - Type A
• The Engine Control Module (ECM) illuminates the
malfunction indicator lamp (MIL) when the
diagnostic runs and fails.
• The ECM records the operating conditions at the
time the diagnostic fails. The ECM stores this
information in the Freeze Frame/ Failure Records.

Action Taken When the DTC Sets - Type B
• The ECM illuminates the MIL on the second
consecutive driving cycle when the diagnostic runs
and fails.
• The ECM records the operating conditions at the
time the diagnostic fails, the ECM stores this
information in the Failure Records. If the
diagnostic reports a failure on the second
consecutive driving cycle, the ECM records the
operating conditions at the time of failure and
stores this information in the Freeze Frame and
updates the Failure Records.

Conditions for Clearing the MIL/ DTC - Type A o
r
Type B • The ECM turns OFF the MIL after 3 consecutive
driving cycles when the diagnostic runs and does
not fail. (Euro 4 Specification)
• The ECM turns OFF the MIL after 1 driving cycle
when the diagnostic runs and does not fail.
(Except Euro 4 Specification)
•
A current DTC clears when the diagnostic runs
and passes after 1 driving cycle.
• A history DTC clears after 40 consecutive warm-
up cycles, if no failures are reported.
• Use a scan tool to clear the MIL and the DTC.

Non-Emissions Related DTCs
Action Taken When the DTC Sets - Type C or Type
D
• The TCM illuminates the Check Trans lamp when
the diagnostic runs and fails.
• The TCM records the operating conditions at the
time the diagnostic fails. The TCM stores this
information in the Failure Records.

• The TCM illuminates the Check Trans on the
second consecutive driving cycle when the
diagnostic runs and fails.
• The TCM records the operating conditions at the
time the diagnostic fails, the TCM stores this
information in the Failure Records. If the
diagnostic reports a failure on the second
consecutive driving cycle, the TCM records the
operating conditions at the time of failure and
stores this information in the Freeze Frame and
updates the Failure Records.

Conditions for Clearing the Check Trans Lamp/ DTC
- Type C or Type D
• The TCM turns OFF the Check Trans lamp after 1
driving cycle when the diagnostic runs and does
not fail.
•
A current DTC clears when the diagnostic runs
and passes after 3 driving cycle.
• A history DTC clears after 40 consecutive warm-
up cycles, if no failures are reported.
• Use a scan tool to clear the Check Trans lamp and
the DTC.

Action Taken When the DTC Sets - Type E or Type F • The TCM will not illuminate the Check Trans lamp.
• The TCM records the operating conditions at the
time the diagnostic fails. The TCM stores this
information in the Failure Records.

Conditions for Clearing the DTC - Type E or Type F •
A current DTC clears when the diagnostic runs
and passes after 1 driving cycle.
• A history DTC clears after 40 consecutive warm-
up cycles, if no failures are reported.
• Use a scan tool to clear the DTC.



BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007

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

DTC P0562 or P0563 (Flash Code 72 or 73)






RTW 77ALF001301

Circuit Description
The Transmission Control Module (TCM) monitors the
system voltage on the ignition feed terminal to the TCM.
A system voltage DTC will set whenever the voltage is
below or above a calibrated value.
Condition For Running The DTC
Ignition "ON" and either (1) or (2) conditions are met.
(1) All of the following conditions are met. • DTC U2104 is not detecting failure of notdeciding failure.
• DTC U2105 is not detecting failure or not deciding failure.
• Engine revolution signal is not detecting failure
or not deciding failure.
• The engine revolution is more than 1000rpm.
• All of the following conditions are met.
- Device Control is not operating
- Disable Normal Communication is receiving enable
- DTC Clear is not operating
(2) All of the following conditions are met. • Input revolution sensor is not detecting failure o
r
not deciding failure.
• Input revolution is more than 1000rpm.


BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007

TRANSMISSION CONTROL SYSTEM (AW30–40LE) 7A2-41

• 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
W hen the TCM detects following conditions at 20 times
continuously.
• Ignition voltage is less than 9 volts for 1 second o
r
more continuously. (DTC P0562)
• Ignition voltage is more than 18 volts for 1 second o
r
more continuously. (DTC P0563)
Action Taken When The DTC Sets
• 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.

Circuit/System Testing DTC P0562 or P0563
Step Action Value(s) YES NO
1
W as the On-Board Diagnostic (OBD) System Check
performed? — Go to
Step 2 Go to OBD
System Check
2 Using the 5-8840-0285-0 DMM, measure the battery voltage at the battery.

Is the battery voltage greater than the specified value? 11.5 V Go to
Step 3 Charge battery,
then go to Step 3
3 1. Install a scan tool.
2. Select “Ignition Volts” on a scan tool.
3. Start the engine and raise the engine speed to the specified value.
4. Load the electrical system by turning on the headlights, high blower, etc.

Is the ignition voltage approximately equal to the
specified value? More than
1000 rpm
9.0-18.0 V Go to
Step 4 Go to
Starting/
Charging

BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007

7A2-42 TRANSMISSION CONTROL SYSTEM (AW30–40LE)

Step Action Value(s) YES NO
4 1. Turn “OFF” the ignition. 2. Disconnect the TCM connector at the TCM.
3. Using the 5-8840-0285-0 DMM, measure the battery voltage between the TCM connector
terminal C94 (Pin No.24)

Is it approximately equal to battery voltage? — Check for
excessive
current with
ignition “OFF”
engine “OFF”. Go to
Step 5
5 1. Check for faulty connections at the TCM harness
terminals.
2. Repair as necessary.

W as a repair necessary? — Go to
Step 8 Go to Step 6
6 1. Check for an open battery feed circuit to the TCM.
2. Repair as necessary.

W as a repair necessary? — Go to
Step 8 Go to Step 7
7 Replace the TCM.
Important: The replacement TCM must be
programmed. (Refer to SPS for procedure.)

W as the action complete? — Go to
Step 8 —
8 1. Reconnect all previously disconnected harness
connector(s).
2. Clear the DTCs with a scan tool.
3. Turn “OFF” the ignition.
4. Start the engine.
5. Operate the vehicle within the Conditions For Running the DTC. You may also operate the
vehicle within the conditions that you observed
from the Freeze Frame/ Failure Records.

Did the DTC fail this ignition? — Go to
Step 2 Go to Step 9
9 Observe the stored information, Capture Info with a
scan tool.

Are there any DTCs that you have not diagnosed? — Go
to
Diagnostic
Trouble Code (DTC) List Verify repair

BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007

TRANSMISSION CONTROL SYSTEM (AW30–40LE) 7A2-43

DTC P0602 (Flash Code 63)
Circuit Description
The Service Programming System (SPS) updates the
flash calibration files that are stored in a Transmission
Control Module (TCM). The calibration file
custom-tailors a module to a certain vehicle. The
calibration file contains data for things such as spark
curves and fuel control. W hen troubleshooting a
driveability problem, diagnosis may call fo
r
reprogramming the controller with newer calibration
information to correct a customer concern and Vehicle
Identification Number (VIN).
Condition for setting the DTC
W hen a VIN No. is not written into the TCM.
Action Taken When The DTC Sets
• 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
DTC P0602 is indicated when a VIN No. is not written
into the TCM.
A security lock is performed by SPS. And
not replace the TCM when DTC P0602 can repair b
y
SPS.



BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007

7A2-44 TRANSMISSION CONTROL SYSTEM (AW30–40LE)

Circuit/System Testing DTC P0602

Step Action Value(s) YES NO
1
W as the “On-Board Diagnostic (OBD) System Check”
performed? — Go to
Step 2 Go to OBD
System Check
2 1. Install a scan tool.
2. Turn “ON” the ignition.
3. Check the Vehicle Identification Number (VIN) by the scan tool.

Is VIN on the scan tool same as VIN of vehicles? — Go to
Step 4 Go to Step 3
3 W rite a VIN by a scan tool. (Refer to SPS for
procedure.)

Is the action complete? — Go to
Step 4 —
4 Clear the DTC P0602 with a scan tool.

Is the action complete? — Go to
Step 5 —
5 Perform the SPS and perform security lock. (Refer to
SPS for procedure)

Is the action complete? — Go to
Step 6 —
6 Recheck the DTC with a scan tool.
1. Turn “OFF” the ignition.
2. W ait a few seconds.
3. Turn “ON” the ignition.

Does a scan tool indicate DTC P0602? — Go to
Step 7 Go to Step 8
7 Replace the TCM.
Important: The replacement TCM must be
programmed. (Refer to SPS for procedure.)

W as the action complete? — Go to
Step 8 —
8 1. Reconnect all previously disconnected harness
connector(s).
2. Clear the DTCs with a scan tool.
3. Turn “OFF” the ignition.
4. Start the engine.
5. Operate the vehicle within the Conditions For Running the DTC. You may also operate the
vehicle within the conditions that you observed
from the Freeze Frame/ Failure Records.

Did the DTC fail this ignition? — Go to
Step 2 Go to Step 9
9 Observe the stored information, Capture Info with a
scan tool.

Are there any DTCs that you have not diagnosed? — Go
to
Diagnostic
Trouble Code (DTC) List Verify repair


BACK TO CHAPTER INDEX
TO MODEL INDEX
ISUZU KB P190 2007