2004 ISUZU TF SERIES air condition

TRANSMISSION CONTROL SYSTEM (AW30–40LE) (V6 3.5L) 7A2-37

DTC P0602 (FLASHING CODE 63) Transmission Control Module (TCM)
Programming Error
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. When 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
When the TCM is not written VIN No.
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 the TCM does not written
VIN No. A security lock is performed by SPS. And not
replace the TCM when DTC P0602 can repair by SPS.

7A2-44 TRANSMISSION CONTROL SYSTEM (AW30–40LE) (V6 3.5L)

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 P0712 (FLASHING CODE 15) Transmission Oil Temperature Sensor
Circuit Low 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 in Automatic Transmission 7A section.
Was the fluid checking procedure performed ? — Go to Step 3 Refer to
Checking
Transmission
Fluid level and
Condition in
Automatic
Transmission
(AW30-40LE)
section
3

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 indicate DTC P0712 ? — Go to Step 4 Refer to
Diagnostic Aids
4 Measure the voltage of the transmission fluid
temperature sensor by the J39200 DMM.

1. Key “OFF".
2. Disconnect the oil temperature sensor connector.

3. Key “ON".

4. Connect the J39200 DMM to the each terminal of
the oil temperature sensor connector E83-2 and
E83-1.
Does the scan tool indicate less than specified
value ? 5V Go to Step 5 Go to Step 6
5 Replace the transmission fluid temperature sensor.
Is the action complete ? — Verify repair —

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 —

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 AW30-
40LE uses high speed CAN bus system. The individual
CAN bus systems are connected via two interfaces and
can exchange information and data. This allows control
modules that are connected to different CAN bus
systems to communicate. Transmission control
modules in the vehicle that require continuous, rapid
communication are connected to the high speed CAN
bus. The automatic transmission is continuously notified
of the current engine load status. Since the automatic
transmission control module has to react immediately to
load status changes, rapid communication is required
between the engine control module and the automatic
transmission control module. The high speed CAN bus
in the AW30-40LE is designed as a two-wire CAN bus
(twisted pair). The wires are shielded and twisted. The
transmission rate is 500K band.

Condition for setting the DTC
The TCM detects invalid signal for 0.18 sec. (After the
TCM leaves a communication start with the ECM fo
r
0.64 sec)
The TCM detects above condition for 2.0 sec
continuously.
Action Taken When The DTC Sets

The line pressure is max.
 The TCM judges APS(Accelerator Position Sensor)
angle is 0% at the time of shift operation.

No line pressure control.

No engine torque control.
 No lock-up control.

No slope control.

Check Trans ON.

DTC stored.

No squat control.

7A2-74 TRANSMISSION CONTROL SYSTEM (AW30–40LE) (V6 3.5L)

DTC U2104 (FLASHING CODE 65) CAN BUSS OFF

RTW37AMF000401

Circuit Description
The automatic transmission control system in AW30-
40LE uses high speed CAN bus system. The individual
CAN bus systems are connected via two interfaces and
can exchange information and data. This allows control
modules that are connected to different CAN bus
systems to communicate. Transmission control
modules in the vehicle that require continuous, rapid
communication are connected to the high speed CAN
bus. The automatic transmission is continuously notified
of the current engine load status. Since the automatic
transmission control module has to react immediately to
load status changes, rapid communication is required
between the engine control module and the automatic
transmission control module. The high speed CAN bus
in the AW30-40LE is designed as a two-wire CAN bus
(twisted pair). The wires are shielded and twisted. The
transmission rate is 500K band.

Condition for setting the DTC
The TCM detects CAN BUS OFF for 0.18 sec (After the
TCM leaves a communucation start with the ECM fo
r
0.64 sec) continously..
Action Taken When The DTC Sets

The throttle pressure is max.

The TCM judges APS(Accelerator Position Sensor)
angle is 0% at the time of shift operation.
 No throttle pressure reduction.

No torque reduction.

No lock-up control.
 No slope control.

No squat control.

Check Trans ON.

DTC stored.

Engine REV is 7000 rpm.
 Coolant tempreature is 80

C.

7A4–12 UNIT REPAIR (AW30–40LE)
5. Install the second brake drum gasket.
Install a new second brake drum gasket to the
transmission case.
24 0RY 0 001 3
6. Individual piston operation inspection.
Check for the sound of operation while injecting
compressed air into the oil hole indicated in the
figure.
24 0RY 0 001 4
E nd OFCa llou t
NOTE: When inspecting the direct clutch, check with
the C–0 accumulator piston hole closed. If there is no
noise, disassemble and check the condition of the parts.7. Install the accumulator pistons.
Coat the O–ring with ATF and install it to the
piston.
Install the three springs and four accumulator
pistons to the bore as shown in th figure.
24 0RY 0 0027
mm (in)
Legend
(1) OD direct clutch
(2) Direct clutch
(3) Forward clutch
(4) OD brake
(5) Second coast brake
(6) Second brake
(7) First and reverse brake
(A) C–0 Accumulator piston hole
Piston Outer diameter Height
B–2 36.8 mm (1.449 in) 62.5 mm (2.461 in)
C–2 36.8 mm (1.449 in) 56.6 mm (2.228 in)
B–0 31.8 mm (1.252 in) 52.0 mm (2.047 in)
C–0 29.8 mm (1.173 in) 44.0 mm (1.732 in)
Spring Free length Outer
diameterColor
B–2 74.6 (2.93) 19.7 (0.78) BROWN
C–2
(Outer)68.5 (2.7) 20.2 (0.80) BLUE
C–2 (Inner) 42.1 (1.658) 14.7 (0.579) PINK
B–0 63.6 (2.504) 16.0 (0.630) RED
C–0
(Outer)74.6 (2.937) 20.9 (0.823) ORANGE
C–0 (Inner) 46.0 (1.811) 14.0 (0.551) YELLOW

UNIT REPAIR (AW30–40LE) 7A4–39
2. Remove the O-ring.
3. Remove the stator shaft.
4. Remove the oil pump drive gear.
5. Remove the oil pump driven gear.
6. Remove the oil pump body.
Remove 13 bolts, and then remove the stator shaft
from oil pump body.
Then remove drive and driven gear.
24 1RY 0 000 6
Inspection and Repair
Make necessary correction or parts replacement if wear,
damage or any abnormal conditions are found through
inspection.
1. Check oil pump body bushing.
Using a dial indicator, measure the inside diameter
of the oil pump body bushing.
Maximum inside diameter: 38.19 mm (1.5035 in)
If the inside diameter is greater than the maximum,
replace the oil pump body.
24 1RY 0 000 7
2. Check stator shaft bushing.
Using a dial indicator, measure the inside diameter
of the stator shaft bushing.
Maximum inside diameter: Front side: 21.58 mm
(0.8496 in)
Maximum inside diameter: Rear side: 27.08 mm
(1.0661 in)
If the inside diameter is greater than the maximum,
replace the stator shaft.
24 1RY 0 0008
3. Check tip clearance of both gears.
Measure between the gear teeth and the
cresent-shaped part of the pump body.
Standard tip clearance: 0.11 – 0.14 mm (0.0043 –
0.0055 in)
Maximum tip clearance: 0.19 mm (0.0075 in)
If the tip clearance is greater than the maximum,
replace the drive gear, driven gear or pump body.
24 1RY 0 0009

7A4–54 UNIT REPAIR (AW30–40LE)
Apply compressed air into the oil passage as
shown, and be sure that the OD brake piston moves
smoothly.
25 2RY 0 004 3
2. Remove the thrust bearing.
3. Remove the race.
4. Remove the thrust washer (plastic).
5. Place special tool on the spring retainer, and
compress the return spring with a shop press.
Spring compressor : J–37233
Remove the snap ring with a screwdriver.
RUW 37A SH00 310 1
6. Romove the piston return spring.7. Place the OD support onto the direct clutch
assembly.
Hold the OD brake piston so it is not slanted and
apply compressed air into the passage to remove
the OD brake piston.
Remove the OD brake piston.
25 2RY 0 0045
8. Remove the O-ring and oil seal rings from OD
support.
Inspection and Repair
Make necessary correction or parts replacement if wear,
damage or any abnormal conditions are found through
inspection.
1. Check piston return spring
Using calipers, measure the free length of the return
spring.
Standard length: 17.2 mm (0.677 in)
25 2RY 0 0046