Tcm ISUZU TF SERIES 2004 Manual PDF
[x] Cancel search | Manufacturer: ISUZU, Model Year: 2004, Model line: TF SERIES, Model: ISUZU TF SERIES 2004Pages: 4264, PDF Size: 72.63 MB
Page 3732 of 4264
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.
Page 3733 of 4264
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
Page 3734 of 4264
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
0C) 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 —
Page 3735 of 4264
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.
Page 3736 of 4264
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
Page 3737 of 4264
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 —
Page 3738 of 4264
7A2-58 TRANSMISSION CONTROL SYSTEM (AW30–40LE) (V6 3.5L)
DTC P0748 (FLASHING CODE 35) Pressure Control Solenoid Electrical
RTW37ALF000601
Circuit Description
The pressure control solenoid is a PWM duty control
solenoid located in the valve body.
The pressure control solenoid is a TCM-controled
device used to regulate transmission throttle pressure
by energizing current from the TCM.
Condition for setting the DTC
The TCM detects following "Condition 1" and "Condition
2".
Condition 1("Ignition short"):
When the TCM detects following condition for 0.5
sec continuously.
Monitor A/D value is more than 1000 (1.36A).
Condition 2("Open or GND short"):
When the TCM detects following condition for 70
msec continuously.
Monitor A/D value is less than 15 (20mA).
Action Taken When The DTC Sets
No squat control.
No line pressure control.
No lock-up control.
No slope control.
Check Trans ON.
Page 3739 of 4264
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
Page 3740 of 4264
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
68F (20C)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
68F (20C)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 —
Page 3741 of 4264
TRANSMISSION CONTROL SYSTEM (AW30–40LE) (V6 3.5L) 7A2-61
DTC P0753 (FLASHING CODE 31) Shift Solenoid S1 Electrical
RTW37ALF000601
Circuit Description
The shift solenoi S1 changes the hydraulic route with
the signals from the TCM according to the vehicle
speed and the throttle opening to control shifting. When
the solenoid S1 or S2 fails, the hydraulic circuit is
mechanically operated as a backup.
Condition for setting the DTC
The TCM detects following "Condition 1" and "
Condition 2" for 2 times continuously at shifting.
Condition 1("GND short"):
Voltage at connector pin is 0V for 0.3 sec
continuously when solenoid is “ON".
Condition 2("Open or Ignition short"):
Voltage at connector pin is ignition voltage for 0.5
sec continuously when solenoid is “OFF".