2007 ISUZU KB P190 Circuit

TRANSMISSION CONTROL SYSTEM (AW30–40LE) 7A2-55

DTC P0717 (Flash Code 14)



RTW 77AMF000601

Circuit Description
Input revolution information is provided to TCM by the
input revolution sensor. This sensor is located in the
transmission case.
The input revolution sensor is an electromagnetic pulse
pickup type that generates a speed signal according to
the revolution of the transmission OD direct clutch
drum. As a result, the sensor sends a sine wave signal
(AC) to the TCM, which converts this sine wave signal
(pulse voltage) to a RPM signal.
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.
• DTC U2104 is not detecting failure or not
deciding failure.
• DTC U2105 is not detecting failure or not
deciding failure.

• Engine revolution sensor is not detecting failure
or not deciding failure.
• The engine revolution is more than 550rpm.
(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
All of the following conditions are met.
(1) 25 seconds or more passed after changing to the except P/R/N from P/R/N.
If the following condition is met when 25 seconds
or more passed after changing, it is considered
that 25 seconds or more passed.
• The oil temperature sensor is not detecting
failure or not deciding failure, and also oil
temperature is more than 20 °C (68 °F).


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ISUZU KB P190 2007

7A2-56 TRANSMISSION CONTROL SYSTEM (AW30–40LE)

(2) Select position switches is not detecting failure o
r
not deciding failure.
(3) Output revolution sensor is not detecting failure o
r
not deciding failure.
(4) Output revolution is more than 600rpm.
(5) If output signal pulse count is more than 9 ×500,
any pulse is not detected from input revolution
sensor.
(6)
Any pulse is not detected at 2nd from input
revolution sensor after condition (9) is met.
(7) Shift solenoid S1 and Shift solenoid S2 are not detecting electric failure or not deciding electric
failure.
(8) Shift solenoid S1 and Shift solenoid S2 are not deciding functional failure.
If the following conditions are not met, keep the
failure detection counter.
(9) 3.5 seconds or more passed after the gear change signal output.
(10) Not 4th gear.
Action Taken When The DTC Sets
• No L-up.
• No line pressure reduction control at gear shift.
• No torque reduction control.
• No slope control
• No output revolution sensor failure detection.
• Cancel input revolution condition of the “Condition For Running The DTC” of system voltage erro
r
detection.
• No shift solenoid failure detection.
• No L-up solenoid failure detection.
• DTC stored.
• Check Trans "ON".
• 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.
• Check input speed sensor for proper mounting and adjustment.

Circuit/System Testing DTC P0717

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. Review and record scan tool data.
4. Operate the vehicle within scan tool data.

Does a scan tool indicate DTC P0717? — Go to
Step 3 Refer to
Diagnostic Aids

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ISUZU KB P190 2007

TRANSMISSION CONTROL SYSTEM (AW30–40LE) 7A2-59

DTC P0722 (Flash Code 11)




RTW 77AMF000701

Circuit Description
Vehicle speed information is provided to the TCM by the
output revolution sensor. This sensor is located in the
transmission adapter or extension housing.
The output revolution sensor is an electromagnetic
pulse pickup type that generates a speed signal
according to the revolution of the transmission output
shaft. As a result, the sensor sends a sine wave signal
(AC) to the TCM, which converts this sine wave signal
(pulse voltage) to a RPM signal.
Condition For Running The DTC
All of the following conditions are met.
(1)
All of the following conditions are met for 2
seconds ore more continuously.
• The supply voltage is more than 10.2 volts and less than 15.5 volts.
• DTC U2104 is not detecting failure or not deciding failure.
• DTC U2105 is not detecting failure or not deciding failure

• Engine revolution sensor is not detecting failure
or not deciding failure.
• The engine revolution is more than 550rpm.
(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
All of the following conditions are met.
(1) 25 seconds or more passed after changing to the except P/R/N from P/R/N.
If the following condition is met when 25 seconds
or more passed after changing, it is considered
that 25 seconds or more passed.
• Oil temperature sensor is not detecting failure o
r
not deciding failure, and also oil temperature is
more than 20 °C (68 °F).


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ISUZU KB P190 2007

7A2-60 TRANSMISSION CONTROL SYSTEM (AW30–40LE)

(2) Select position switches is not detecting failure o
r
not deciding failure.
(3) Input revolution sensor is not detecting failure o
r
not deciding failure.
(4) Output revolution calculated by input revolution is more than 300rpm.
(5) If input revolution signal pulse count is more than 13 ×500, any pulse is not detected from output
revolution sensor.
Action Taken When The DTC Sets
• The TCM uses input speed sensor as a vehicle
speed.
• No squat control.
• No torque reduction control.
• No line pressure control.
• No use 4th gear.
• No lock-up control.
• No reverse lock out control.
• No slope control.
• Control gear change by calculating vehicle speed from input revolution sensor.
• No coast control.
• No input revolution sensor failure detection.
• Keep oil temperature sensor open failure detection accumulated timer.
• No select position switch (OPEN) failure decision.
• No T/F Hi-Low SW failure detection.
• No shift solenoid functional failure detection.
• No L-up solenoid functional failure detection.
• No lockup “OFF” control at fuel cut.
• 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.
• Check output revolution sensor for proper mounting and adjustment.

Circuit/System Testing DTC P0722

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. Review and record scan tool data.
4. Operate the vehicle within scan tool data.

Does a scan tool indicate DTC P0722? — Go to
Step 3 Refer to
Diagnostic Aids

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ISUZU KB P190 2007

TRANSMISSION CONTROL SYSTEM (AW30–40LE) 7A2-63

DTC P0741 (Flash Code 43)






RTW 77ALF001501

Circuit Description
The lock-up solenoid SL of the torque converter clutch
(TCC) controls the lock-up clutch by a signal according
to the lock-up position judgment of the Transmission
Control Module (TCM) when the vehicle runs.
This function can improve the fuel consumption to
almost the same extent as the manual transmission.
The lock-up solenoid SL is put into B+ by the TCM, so
that the solenoid is actuated with the result of lock-up.

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.
• DTC U2104 is not detecting failure or not deciding 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 550 rpm.

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ISUZU KB P190 2007

TRANSMISSION CONTROL SYSTEM (AW30–40LE) 7A2-65

Circuit/System Testing DTC P0741
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. Review and record scan tool data.
4. Operate the vehicle within scan tool data.

Does a scan tool indicate DTC P0741? — Go to
Step 3 Refer to
Diagnostic Aids
3 Perform the transmission fluid checking procedure.
Refer to checking Transmission Fluid level and
Condition in Automatic Transmission 7A section.
If the problem found, repair or replace necessary.

W as the problem found? — Go to
Step 8 Go to Step 4
4 Observe the TCC slip speed data on a scan tool.
1. Turn “ON” the ignition with the engine “ON”.
2. Road testing the vehicle.
3. The throttle position is more than 20%.
4. The vehicle speed is more than 5 km/h (3 mph).
5. The TCC slip speed is less than 100 rpm at 4th gear L-up.

Above conditions were indicated on a scan tool
display? — Refer to
Diagnostic Aids Go to
Step 5
5 Check the following items.
• Check the L-up solenoid valve. (Refer to Section
7A3)
• L-up solenoid valve stuck “OFF” the release
position (Refer to Section 7A4)
• Misaligned or damaged valve body gasket.
• Restricted apply passage.

If the problem found, replaces as necessary.
W as the problem found? — Go to
Step 8 Go to Step 6
6 Check the DTC on a scan tool.

Is DTC found on a scan tool? — Go to
Step 7 Go to Step 8
7 Replace the Torque converter (Refer to Section 7A4).

Is the action complete? — Go to
Step 8 —

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ISUZU KB P190 2007

TRANSMISSION CONTROL SYSTEM (AW30–40LE) 7A2-67

DTC P0742 (Flash Code 53)






RTW 77ALF001501

Circuit Description
The lock-up solenoid SL of the torque converter clutch
(TCC) controls the lock-up clutch by a signal according
to the lock-up position judgment of the Transmission
Control Module (TCM) when the vehicle runs.
This function can improve the fuel consumption to
almost the same extent as the manual transmission.
The lock-up solenoid SL is put into B+ by the TCM, so
that the solenoid is actuated with the result of lock-up.
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.
• DTC U2104 is not detecting failure or not deciding 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 550rpm.

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TO MODEL INDEX
ISUZU KB P190 2007

TRANSMISSION CONTROL SYSTEM (AW30–40LE) 7A2-69

Circuit/System Testing DTC P0742
Step Action Value(s) YES NO
1
W as the On-Board Diagnostic (OBD) System Check
performed? 1. Install the scan tool. — Go to
Step 2 Go to OBD
System Check
2 1. Install a scan tool.
2. Turn “ON” the ignition.
3. Review and record scan tool data.
4. Operate the vehicle within scan tool data.

Does a scan tool indicate DTC P0742? — Go to
Step 3 Refer to
Diagnostic Aids
3 Perform the transmission fluid checking procedure.
Refer to checking Transmission Fluid level and
Condition in Automatic Transmission 7A section.
If the problem found, repair or replaces necessary.

W as the problem found? — Go to
Step 8 Go to Step 4
4 Observe the TCC slip speed data on a scan tool.
1. Turn “ON” the ignition with engine “ON”.
2. Road testing the vehicle.
3. The throttle position is more than 20%.
4. The vehicle speed is between 5 km/h (3 mph) and 100 km/h (62 mph).
5. The TCC slip speed is more than 150 rpm at 2nd gear L-up “OFF”.
6. The throttle position is more than 25%.
7. The vehicle speed is between 5 km/h (3 mph) and 80 km/h (50 mph).
8. The T/C revolution difference is less than 100 rpm at 3rd L-up “OFF”.

Above conditions were indicated on a scan tool
display? — Refer to
Diagnostic Aids Go to
Step 5
5 Check the following items.
• Check the L-up solenoid valve. (Refer to Section
7A3)
• L-up solenoid valve stuck “ON” the release position
(Refer to Section 7A4)
• Misaligned or damaged valve body gasket.
• Restricted apply passage.

If the problem found, replaces as necessary.

W as the problem found? — Go to
Step 8 Go to Step 6
6 Check the DTC on a scan tool.

Is DTC found on a scan tool? — Go to
Step 7 Go to Step 8

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TO MODEL INDEX
ISUZU KB P190 2007