Transmission ISUZU TF SERIES 2004 Workshop Manual

TRANSMISSION CONTROL SYSTEM (AW30–40LE) (V6 3.5L) 7A2-47

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.

When diagnosing for a possible intermittent short o
r
open condition, move the wiring harness while
observing test equipment for a change.

Check oil temperature sensor for proper mounting
and adjustment.

DTC P0713 (FLASHING CODE 16) Transmission Oil Temperature Sensor
Circuit Hight Input


Step Action Value(s) YES NO
1
Was the powertrain On-Board Diagnostic (OBD)
System Check performed ? — Go to Step 2 Go to OBD
System check
2 Perform the transmission fluid checking procedure.
Refer to Checking Transmission Fluid Level and
condition Automatic Transmission7A section.
Was the fluid checking procedure performed ? — Go to Step 3 Refer to
checking
Transmission
Fluid Level and
Condition
Automatic
Transmission
(AW30-40LE)
section
3

1. Install the scan tool ?

2. Key “ON"
3. Review and record scan tool date.

4. Operate the vehicle with in scan tool data.
Does the scan tool indicator DTC P0713 ? — Go to Step 4 Go to
Diagnostic Aids
4 Observe the voltage of the transmission fluid
temperature sensor on the TECH2 data.

1. Key “OFF".

2. Disconnect the transmission fluid temperature
sensor connector E-83
3. Install a fused jumper wire from terminal E83-2 to
E83-1 on the mission harness.

4. Key “ON".
Does the scan tool indicate more than specified
value ? 0.4V Go to Step 5 Go to Step 6
5 Replace the transmission fluid temperature sensor .
If the action complete ? — Verify repair —

7A2-48 TRANSMISSION CONTROL SYSTEM (AW30–40LE) (V6 3.5L)

Step Action Value(s) YES NO
6 Measure the resistance of wire by the J39200 DMM.

1. Key “OFF".
2. Disconnect the TCM connector

3. Install a fused jumper wire from terminal E83-1
and E83-2 on the mission harness.
Does the scan tool indicate less than specified
value ? less than 1
Go to Step 8 Go to Step 7
7 Repair an open circuit.
Was the problem found ? — Verify repair —
8 Replace the TCM
IMPORTANT ; The replacement TCM must be
programmed. (Refer to SPS for procedure.)
Is the action complete ? — Verify repair —

TRANSMISSION CONTROL SYSTEM (AW30–40LE) (V6 3.5L) 7A2-49

DTC P0717 (FLASHING CODE 14) Input Speed Sensor Signal Error

MAW060MF001501

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 setting the DTC
The TCM detects following conditions at 1000
times continuously.

When the TCM detects following conditions at the
same time.
 When output speed is over 775 rpm (16 mph) at
gear position is 1st or 2nd or 3rd.

Input speed signal is no pulse while output speed
signal are 12 pulses.

OR

When the TCM output 2nd gear.
 The TCM detects no pulse of input speed senso
r
circuit signal after 3.5 sec.
(detection time: 0.03 sec at vehicle speed is 36 mph)
Action Taken When The DTC Sets

No engine torque control.
 No line pressure control.

No lock-up control.

No slope control.

Check Trans ON.
 DTC stored.

No detect DTC P0722.
Conditions For Clearing The DTC

The DTC can be cleared from the TCM history by
using a scan tool.

7A2-50 TRANSMISSION CONTROL SYSTEM (AW30–40LE) (V6 3.5L)

 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.

When diagnosing for a possible intermittent shorto
r
open condition, move the wiring harness while
observing test equipment for a change.
 Check input speed sensor for proper mounting and
adjustment.


DTC P0717 (FLASHING CODE 14) Input Speed Sensor Signal Error


Step Action Value(s) YES NO
1
Was the powertrain On-Board Diagnostic (OBD)
System check performed ? — Go to Step 2 Go to OBD
system check
2

1. Install the scan tool.

2. Key “ON".
3. Review and record scan tool data

4. Operate the vehicle with in scan tool data.
Does the scan tool indicator DTC0717 ? — Go to Step 3 Refer to
Diagnostic Aids
3 Measure voltage of the input revolution sensor by the
J39200 DMM.

1. Key “ON".
2. Engine run.

3. Disconnect the input revolution sensor connector .

4. Measure the voltage between terminal the input
revolution sensor connector E80-1 and E80-2.
Does the scan tool indicate less than specified
value ? 3V Refer to
Diagnostic Aids Go to Step 4

TRANSMISSION CONTROL SYSTEM (AW30–40LE) (V6 3.5L) 7A2-51

Step Action Value(s) YES NO
4 Measure the resistance of wire by the J39200 DMM.

1. Key “OFF".
2. Disconnect the TCM connector.

3. Connect the input revolution sensor connector.

4. Measure the resistance between the TCM
connector terminal C95-6 and C95-16.
Does the scan tool indicate specified value ? 560680

(20
C) Go to Step 5 Go to Step 6
5

1. Replace the TCM.

2. Install the scan tool(TECH2).
3. Make a road running test for the vehicle.
Important:
The replacement TCM must be
programmed. (Refer to SPS for procedure.)
Dose the scan tool indicate DTC P0717 ? — Go to Step 7 Go to Step 8
6 Measure the resistance of input revolution sensor by
the J39200 DMM.

1. Key “OFF".
2. Disconnect the input revolution sensor connector.

3. Measure the resistance between terminal input
revolution sensor side connector E80-1 and E80-
2.
Does the scan tool indicate specified ? 560680

(20

C) Go to Step 9 Go to Step 7
7 Replace the input revolution sensor.
Is the action complete ? — Verify repair —
8 Replace the TCM.
IMPORTANT; The replacement TCM must be
programmed. (Refer to SPS for procedure.)
Is the action complete ? — Verify repair —
9 Check the wire between terminal C95-6 and E80-2 or
C95-16 and E80-1.

1. 1.Connect the J39200 DMM to the each of the
TCM connector and input revolution sensor.
If the problem found repair as necessary.
Was the found problem ? — Verify repair —

7A2-52 TRANSMISSION CONTROL SYSTEM (AW30–40LE) (V6 3.5L)

DTC P0722 (FLASHING CODE 11) Output Speed Sensor Signal Error


RTW37AMF000501

Circuit Description
Vehicle speed information is provided to the TCM by
the output revolution sensor. This sensor is located in
the transmission adapter 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 setting the DTC
The TCM detects following conditions at 500 times
continuously.
(When gear positions are 1st, 2nd and 3rd.)
When the TCM detects following conditions at the
same time.

Output speed signal is no pulse while input speed
signal are 45 pulses.
(Detection time, 1st: 0.031 sec, 2nd: 0.057 sec, 3rd:
0.087 sec, at vehicle speed is 38 mph.)
Action Taken When The DTC Sets

The TCM uses input speed sensor as a vehicle
speed.

No squat control.

No engine torque control.
 No line pressure control.

No use 4th gear.

No lock-up control.
 No slope control.

Check Trans ON.

DTC stored.
 No reverse lockout control.
Conditions For Clearing The DTC

The DTC can be cleared from the TCM history by
using a scan tool.

TRANSMISSION CONTROL SYSTEM (AW30–40LE) (V6 3.5L) 7A2-53

 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.

When diagnosing for a possible intermittent short o
r
open condition, move the wiring harness while
observing test equipment for a change.
 Check output speed sensor for proper mounting and
adjustment.


DTC P0722 (FLASHING CODE 11) Output Speed Sensor Signal Error


Step Action Value(s) YES NO
1
Was the powertrain On-Board Diagnostic (OBD)
System check performed ? — Go to Step 2 Go to OBD
system check
2

1. Install the scan tool.

2. Key “ON".
3. Review and record scan tool data

4. Operate the vehicle with in scan tool data.
Does the scan tool indicator DTC 0722 ? — Go to Step 3 Refer to
Diagnotic Aids
3 Measure the voltage of the output revolution sensor
by the J39200 DMM.

1. Key “OFF"
2. Lift the driving wheels.

3. Disconnect the output revolution sensor connector.

4. With engine idling in gear.
5. Measure the voltage between the output revolution
sensor connector terminal E81-1 and E81-2.
Does the scan tool indicate less than specified
value ? 3V Refer to
Diagnostic Aids Go to Step 4

7A2-54 TRANSMISSION CONTROL SYSTEM (AW30–40LE) (V6 3.5L)

Step Action Value(s) YES NO
4 Measure the resistance of wire by the J39200 DMM.

1. Key “OFF".

2. Disconnect the TCM connector.
3. Connect the output revolution sensor connector.

4. Measure the resistance between the TCM terminal
C95-5 and C95-14
Does the scan tool indicate specified value ? 560680
(2
0
C) Go to Step 5 Go to Step 6
5

1. Replace the TCM

2. Install the scan tool (TECH2).
3. Make a road running test for the vehicle.
Important:
The replacement TCM must be
programmed. (Refer to SPS for procedure.)
Does the scan tool indicate DTC P0722 ? — Go to Step 7 Go to Step 8
6 Measure the resistance of output revolution sensor by
the J39200 DMM.

1. Key “OFF"
2. Disconnect the output revolution sensor connector.

3. Measure the resistance between terminal output
revolution sensor side connector E81-1 and E81-
2.
Does the scan tool indicate specified ? 560680
(2
0

C) Go to Step 9 Go to Step 7
7 Replace the output revolution sensor.
Is the action complete ? — Verify repair —
8 Replace the TCM.
Important:
The replacement TCM must be
programmed. (Refer to SPS for procedure.)
Is the action complete ? — Verify repair —
9 Check the wire between terminal C95-5 and E81-1 or
C95-14 and E81-2.

1. Connect the J39200 DMM to the each the TCM
connector and output revolution sensor.
If the problem found repair as necessary.
Was the found problem ? — Verify repair —

TRANSMISSION CONTROL SYSTEM (AW30–40LE) (V6 3.5L) 7A2-55

DTC P0743 (FLASHING CODE 33) Torque Converter Clutch Electrical


RUW37ALF000601
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 range judgment of the 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 setting the DTC
The TCM detects following conditions both "Condition
1" and "Condition 2" occur 2 times or more than it.
Condition 1 ("GND short"):

Voltage at connector pin is 0V for 0.3 sec
continuously when solenoid is “ON".
Condition 2 ("Open or IG short"):

Voltage at connector pin is ignition voltage for 0.5
sec continuously when solenoid is “OFF".
Action Taken When The DTC Sets

No lock-up control.
 The TCM fixes to 1st gear when the vehicle speed is
less than 6 mph.

Check Trans ON.

DTC stored.

7A2-56 TRANSMISSION CONTROL SYSTEM (AW30–40LE) (V6 3.5L)

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.5 (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.

When diagnosing for a possible intermittent short
oropen condition, move the wiring harness while
observing test equipment for a change.


DTC P0743 (FLASHING CODE 33) Torque Converter Clutch Electrical


Step Action Value(s) YES NO
1
Was the Powertrain On-Board Diagnostic (OBD)
System Check performed? — Go to Step 2 Go to OBD
System Check
2

1. Install the scan tool.

2. Key “ON".
3. Review and record scan tool data.

4. Operate the vehicle within scan tool data.
Does the scan tool indicate DTC P0743? — Go to Step 3 Refer to
Diagnostic Aids
3

1. Key “ON", engine run.

2. Place the selector lever in the "P" range.
3. Measure the voltage between terminal C94-5 and
terminal C94-1 on the TCM pigtail connector by
J39200 DMM.
Is the voltage specified value? 816V Go to Step 4 Go to Step 10