key ISUZU TF SERIES 2004 Workshop Manual

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 —

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 —

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

TRANSMISSION CONTROL SYSTEM (AW30–40LE) (V6 3.5L) 7A2-57

Step Action Value(s) YES NO
4

1. Key "OFF".

2. Disconnect the TCM connector (C-94).
3. Key "ON".

4. Measure the voltage between terminal C94-5 and
terminal C94-1 by J39200 DMM.
Is the voltage specified value? 0V Go to Step 5 Go to Step 7
5

1. Key “OFF".

2. Measure the resistance between terminal C94-5
and body ground by J39200 DMM.
Is the resistance specified value? 
Go to Step 9 Go to Step 6
6

1. Disconnect the automatic transmission connector
(E-82).

2. Measure the resistance between terminal E82-7
and body ground by J39200 DMM.
Is the resistance specified value? 
Go to Step 7 Go to Step 8
7

1. Check for open or short in the wire between
terminal C94-5 and terminal E82-7.

2. Repair or replace the wire between terminal C94-5
and terminal E82-7.
Is the action complete? — Verify repair —
8 Replace the SL solenoid.
Is the action complete? — Verify repair —
9

1. Clear the DTC.

2. Perform the test-driving.
3. Check the DTC.
Was DTC P0743 stored? — Go to Step 10 Refer to
Diagnostic Aids
10 Replace the TCM.
Is the action complete? — Verify repair —

TRANSMISSION CONTROL SYSTEM (AW30–40LE) (V6 3.5L) 7A2-59


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.

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


DTC P0748 (FLASHING CODE 35) Pressure Control Solenoid Malfunction


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 P0748? — 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.
Was the fluid checking procedure performed? — Go to Step 4 Refer to
checking
Transmission
Fluid level and
Condition in
Automatic
Transmission
(AW30-40LE)
section

7A2-60 TRANSMISSION CONTROL SYSTEM (AW30–40LE) (V6 3.5L)

Step Action Value(s) YES NO
4 Measure the resistance of pressure control solenoid.

1. Key “OFF".
2. Disconnect the automatic transmission connector
and TCM connector.

3. Measure the resistance between automatic
transmission terminal E82-2 and automatic
transmission terminal E82-6.
Is the resistance specified value? 5 to 5.6
at
68
F (20
C)Go to Step 5 Go to Step 8
5 Measure the resistance of wire between terminal
C94-2 and terminal C94-4

1. Key “OFF".
2. Connect the automatic transmission connector.

3. Disconnect the TCM connector.

4. Measure the resistance between terminal C94-2
and terminal C94-4.
Is the resistance specified value? 5 to 5.6
at
68
F (20
C)Go to Step 7 Go to Step 6
6 Repair or Replace the wire between terminals C94-
2,4 and terminals E82-6,2.
Is the action complete? — Verify repair —
7 Observe the pressure control solenoid valve data on
the scan tool data.

1. Key “ON".
Does the scan tool indicate is specified value? 1.0- Verify repair Go to Step 9
8 Replace the pressure control sorenoid.
Is the action complete? — Verify repair —
9 Replace the TCM.
Important:
The replacement TCM must be
programmed (Refer to SPS for procedure).
Is the action complete? — Verify repair —

7A2-62 TRANSMISSION CONTROL SYSTEM (AW30–40LE) (V6 3.5L)

Action Taken When The DTC Sets

The TCM operates shifting as following pattern.



Normal Fail S1 S2
1 3 - on
2 3 - on
3 3 - on
4 4 - off

No squat control.
 No engine torque control.

No line pressure control.

No lock-up control.
 No slope control.

Check Trans ON.

DTC stored.

No detect DTC P0722

No detect DTC P0717

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.

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


DTC P0753 (FLASHING CODE 31) Shift Solenoid S1 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 P0753? — 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 C94-16 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

TRANSMISSION CONTROL SYSTEM (AW30–40LE) (V6 3.5L) 7A2-63

Step Action Value(s) YES NO
4

1. Key "OFF".

2. Disconnect the TCM connector (C-94).

3. Key "ON".
4. Measure the voltage between terminal C94-16 and
terminal C94-1 by J39200 DMM.
Is the voltage specified value? 0V Go to Step 5 Go to Step 7
5

1. Key “OFF".

2. Measure the resistance between terminal C94-5
and body ground by J39200 DMM.
Is the resistance specified value? 
Go to Step 9 Go to Step 6
6

1. Disconnect the automatic transmission connector
(E-82).

2. Measure the resistance between terminal E82-4
and body ground by J39200 DMM.
Is the resistance specified value? 
Go to Step 7 Go to Step 8
7

1. Check for open or short in the wire between
terminal C94-16 and terminal E82-4.

2. Repair or replace the wire between terminal C94-
16 and terminal E82-4.
Is the action complete? — Verify repair —
8 Replace the SL solenoid.
Is the action complete? — Verify repair —
9

1. Clear the DTC.

2. Perform the test-driving.
3. Check the DTC.
Was DTC P0753 stored? — Go to Step 10 Refer to
Diagnostic Aids
10 Replace the TCM.
Is the action complete? — Verify repair —

TRANSMISSION CONTROL SYSTEM (AW30–40LE) (V6 3.5L) 7A2-65

Action Taken When The DTC Sets
The TCM operates shifting as following patterns.



Normal Fail S1 S2
1 3 - on
2 3 - on
3 3 - on
4 4 - off

No squat control.
 No engine torque control.

No line pressure control.

No lock-up control.
 No slope control.

No torque reduction.

Check Trans ON.

DTC stored.

No detect DTC P0722.

No detect DTC P0717.

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.

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


DTC P0758 (FLASHING CODE 32) Shift Solenoid S2 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 P0758? — 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 C94-15 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