2004 ISUZU TF SERIES Workshop Manual

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Page 3745 of 4264

ISUZU TF SERIES 2004 Workshop Manual 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

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

Page 3746 of 4264

ISUZU TF SERIES 2004 Workshop Manual 7A2-66 TRANSMISSION CONTROL SYSTEM (AW30–40LE) (V6 3.5L)

Step Action Value(s) YES NO
4

1. Key "OFF".

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

4. Measure the voltage bet

Page 3747 of 4264

ISUZU TF SERIES 2004 Workshop Manual TRANSMISSION CONTROL SYSTEM (AW30–40LE) (V6 3.5L) 7A2-67

DTC P1767 (FLASHING CODE 67) ECM CAN Invalid

RTW37AMF000401

Circuit Description
The automatic transmission control system in AW3

Page 3748 of 4264

ISUZU TF SERIES 2004 Workshop Manual 7A2-68 TRANSMISSION CONTROL SYSTEM (AW30–40LE) (V6 3.5L)

Engine REV is 7000 rpm.

Coolant tempreature is 80
C.

No detect DTC P0712, 0713.
No detect DTC P0560.
Conditions For Cle

Page 3749 of 4264

ISUZU TF SERIES 2004 Workshop Manual TRANSMISSION CONTROL SYSTEM (AW30–40LE) (V6 3.5L) 7A2-69

DTC P1767 (FLASHING CODE 67) ECM CAN Invalid

Step Action Value(s) YES NO
1
Was the Powertrain On-Board Diagnostic (OBD)
System Chec

Page 3750 of 4264

ISUZU TF SERIES 2004 Workshop Manual 7A2-70 TRANSMISSION CONTROL SYSTEM (AW30–40LE) (V6 3.5L)

DTC P1790 (FLASHING CODE 61) Transmission Control Module ROM
Checksum Error
Circuit Description
The electrically erasable programable r

Page 3751 of 4264

ISUZU TF SERIES 2004 Workshop Manual TRANSMISSION CONTROL SYSTEM (AW30–40LE) (V6 3.5L) 7A2-71

DTC P1790 (FLASHING CODE 61) Transmission Control Module ROM
Checksum Error

Step Action Value(s) YES NO
1
Was the Powertrain ON-Bo

Page 3752 of 4264

ISUZU TF SERIES 2004 Workshop Manual 7A2-72 TRANSMISSION CONTROL SYSTEM (AW30–40LE) (V6 3.5L)

DTC P1791 (FLASHING CODE 62) Transmission Control Module RAM Error
Circuit Description
DTC P1791 is recorded by TCM when there is
malfun

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