check transmission fluid ISUZU AXIOM 2002 Service Owner's Guide
[x] Cancel search | Manufacturer: ISUZU, Model Year: 2002, Model line: AXIOM, Model: ISUZU AXIOM 2002Pages: 2100, PDF Size: 19.35 MB
Page 1726 of 2100
TRANSMISSION CONTROL SYSTEM (4L30±E)7A1±39
DTC P0713 Transmission Fluid Temperature (TFT) Sensor Circuit High Input
D07R200004
Circuit Description
The TFT sensor is a thermistor that controls the signal
voltage to the PCM. The PCM supplies a 5±volt reference
signal to the sensor on circuit RED/BLK. When the
transmission fluid is cold, the sensor resistance is high
and the PCM will sense high signal voltage. As the
transmission fluid temperature warms to the normal
operating temperature of 100C (212F), the sensor
resistance becomes less and the voltage decreases to
about 1.5 to 2 volts.
This DTC detects a continuous open or short to power in
the TFT signal circuit or the TFT sensor. This is a type ªDº
DTC.
Conditions For Setting The DTC
Battery voltage is between 10 and 16 volts.
Ignition is ªonº.
TFT sensor indicating a voltage greater than 4.86
volts.
All conditions met for 20 seconds.
Action Taken When The DTC Sets
Transmission default temperature will be:
80C (176F) if engine temperature code is set.
100C (212F) if engine temperature is warm.
80C (176F) if engine run time is greater than 5
minutes.
21C (69.8F) if engine run time is less than 5
minutes.
The PCM will not illuminate the Malfunction Indicator
Lamp (MIL).
Conditions For Clearing The DTC
The DTC can be cleared from the PCM history by
using a scan tool.The DTC will be cleared from history when the vehicle
has achieved 40 warmup cycles without a failure
reported.
The PCM will cancel the DTC default actions when
the fault no longer exists and the ignition is cycled ªoffº
long enough to power down the PCM.
Diagnostic Aids
Inspect the wiring for poor electrical connection at the
PCM and transmission 7-way connector. 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 or
open condition, move the wiring harness while
observing test equipment for a change.
Scan tool displays transmission fluid temperature in
degrees. After transmission is operating, the
temperature should rise steadily to about 100C
(212F), then stabilize.
The temperature to resistance value scale may be
used to check the TFT sensor at the various
temperature levels to evaluate the possibility of a
ªskewedº (mis±scaled) sensor.
A ªskewedº sensor could result in hard shifts or TCC
complaints.
Test Description
The numbers below refer to the step numbers on the
diagnostic chart:
3. This check verifies problem in the TFT sensor circuit.
4. This test simulates a TFT sensor DTC P0712. If the
PCM recognizes the low signal voltage (high
temperature), and the scan tool displays 146C
(295F) or greater, the PCM and wiring are OK.
5. This test checks the TFT sensor and internal wiring
harness.
Page 1727 of 2100
7A1±40
TRANSMISSION CONTROL SYSTEM (4L30±E)
DTC P0713 Transmission Fluid Temperature (TFT) Sensor Circuit High Input
StepActionYe sNo
1Were you sent here from the ªPowertrain On±Board Diagnostic
(OBD) System Checkº?
Go to Step 2
Go to OBD
System Check
Refer to
Driveability and
Emission in
Engine section
2Perform the transmission fluid checking procedure.
Refer to
Checking Transmission Fluid Level and Condition in
Automatic Transmission (4L30±E) section.
Was the fluid checking procedure performed?
Go to Step 3
Refer to
Checking
Transmission
Fluid Level and
Condition in
Automatic
Transmission
(4L30±E) section
31. Install the scan tool.
2. With the engine ªoffº, turn the ignition switch ªonº.
NOTE: Before clearing DTC(s), use the scan tool to record ªFreeze
Frameº and ªFailure Recordsº for reference, as data will be lost
when the ªClear Infoº function is used.
3. Record the DTC ªFreeze Frameº and ªFailure Recordsº.
Does the scan tool display a TFT sensor signal voltage greater
than 4.86 volts?
Go to Step 4
Go to Diagnostic
Aids
41. Turn the ignition ªoffº.
2. Disconnect the transmission 7±way connector E±42.
3. Install a fused jumper wire from terminal E42±4(F) to
E42±1(E) on the engine harness.
4. Turn the ignition ªonº.
Does the TFT signal voltage drop to less than 0.4 volts?
Go to Step 5Go to Step 10
51. Turn the ignition ªoffº.
2. Using the J39200 DVOM, measure the resistance between
terminals E42±4(F) and E42±1(E).
Is the resistance within specifications? (See Transmission Fluid
Temperature (TFT) Sensor Specifications.)
Go to Diagnostic
Aids
Go to Step 6
61. Disconnect the transmission 7±way connector E±42.
2. Using the J39200 DVOM, measure the resistance between
terminals E42±4(F) and E42±1(E).
Is the resistance within specifications? (See Transmission Fluid
Temperature (TFT) Sensor Specifications.)
Go to Diagnostic
Aids
Go to Step 7
71. Remove the transmission oil pan.
2. Check the internal wiring harness for an open. Refer to
Transmission Oil Temperature Sensor (Main Case) in
Automatic Transmission (4L30±E) section.
Was a problem found and corrected?Go to Step 14Go to Step 8
81. Disconnect the internal wiring harness at the TFT sensor.
2. Measure the resistance of the TFT sensor.
Is the resistance within specifications? (See Transmission Fluid
Temperature (TFT) Sensor Specifications.)
Go to Diagnostic
Aids
Go to Step 9
9Replace TFT sensor. Refer to Transmission Oil Temperature
Sensor (Main Case) in Automatic Transmission (4L30±E) section.
Is the replacement complete?Go to Step 14Ð
Page 1728 of 2100
TRANSMISSION CONTROL SYSTEM (4L30±E)7A1±41
DTC P0713 Transmission Fluid Temperature (TFT) Sensor Circuit High Input (Cont'd)
StepNo Ye s Action
10Check circuit RED/BLK for an open or short to B+.
Was a problem found?
Go to Step 14Go to Step 11
11Check circuit RED/WHT for an open.
Was a problem found?
Go to Step 14Go to Step 12
12Check the PCM for faulty or intermittent connections.
Was a problem found?
Go to Step 14Go to Step 13
13Replace the PCM. Refer to Powertrain Control Module (PCM) in
Automatic Transmission (4L30±E) section.
Is the replacement complete?Go to Step 14Ð
141. After the repair is complete, use the scan tool to select ªDTCº,
then ªClear Infoº function and ensure the following conditions
are met:
2. TFT sensor indicates a voltage less than 4.92 volts for 2
seconds.
3. Review the scan tool ªDTC Infoº.
Has the last test failed or is the current DTC displayed?
Begin diagnosis
again
Go to
Step 1
Repair verified
Exit DTC table
Page 1741 of 2100
7A1±54
TRANSMISSION CONTROL SYSTEM (4L30±E)
The PCM will illuminate the CHECK TRANS Lamp.
Turn force motor OFF.
Conditions For Clearing The DTC/CHECK
TRANS Lamp
The PCM will turn ªoffº the CHECK TRANS Lamp
after three consecutive ignition cycles without a
failure reported.
The DTC can be cleared from PCM memory by using
a scan tool.
The DTC can also be cleared from memory when the
vehicle has made 40 warmup cycles without a failure
reported.
The PCM will cancel the DTC Actions Taken items
when the fault conditions no longer exist and the
ignition is cycles ªoffº long enough to power down the
PCM.
Diagnostic Aids
Check for intermittent output speed sensor circuit
problems.
Check for possible incorrect calibration. (PCM part
No., tire specification, and rear axle ratio)
Test Description
The numbers below refer to the step numbers on the
diagnostic chart:
3. This step checks for possible low fluid level causing
slipping resulting in an undefined gear ratio.
4. This step checks for correct gear ratios for
commanded gears.
5. This step checks for low line pressure.
DTC P0730 Gear Error Without Input Speed
StepActionYe sNo
1Were you sent here from the ªOn±Board Diagnostic (OBD)
System Checkº?
Go to Step 2
Go to OBD
System Check
Refer to
Driveability and
Emission in
Engine section
2Visually inspect the transmission cooling system for fluid leaks.
Refer to
Chart 16: Possible Causes of Transmission Fluid
Leaks of Mechanical/Hydraulic Diagnosis Symptoms Index in
Automatic Transmission (4L30±E) section
Was condition found and corrected?Go to Step 7Go to Step 3
3Refer to Checking Transmission Fluid Level and Condition in
Automatic Transmission (4L30±E) section.
Has transmission fluid checking procedure been performed?
Go to Step 4
Go to Checking
Transmission
Fluid Level and
Condition in
Automatic
Transmission
(4L30±E) section
41. Install the scan tool.
2. Turn the ignition switch to the ªonº position.
3. Engine not running.
NOTE: Before clearing DTC(s) use the scan tool to record the
ªFailure Recordsº for reference, as data will be lost when the ªClear
Infoº function is used.
4. Record the Failure Record data.
5. Use the scan tool snapshot mode to record transmission gear
ratios.
6. Drive vehicle in transmission gear ranges L, 2, 3, and D with
the engine speed is greater than 3,500 rpm for 5.5 seconds.
7. Record each transmission gear.
1st:2.73 ± 2.99
2nd:1.54 ± 1.71
3rd:0.93 ± 1.05
4th:0.66 ± 0.78
Does commanded gear ratio match ranges as shown?
Refer to
Diagnostic AidsGo to Step 5
Page 1743 of 2100
7A1±56
TRANSMISSION CONTROL SYSTEM (4L30±E)
DTC P0742 Torque Converter Clutch (TCC) System Stuck On
D07R200008
Circuit Description
The PCM energizes the TCC solenoid by creating an
ignition voltage on circuit BRN/BLU. When ignition
voltage is energized by the PCM, the TCC solenoid stops
converter signal oil from exhausting. This causes
converter signal oil pressure to increase and move the
TCC valve. The TCC solenoid will deenergize when the
PCM no longer provides ignition voltage. When the TCC
solenoid is deenergized, it will exhaust fluid and release
the TCC.
This DTC detects low torque converter slip when the TCC
is commanded ªoffº. This is a type ªBº DTC.
Conditions For Setting The DTC
The following conditions occur once per TCC cycle, three
consecutive times:
No TPS DTCs P0122 or P0123.
No OSS DTCs P0722 or P0723.
No TCC solenoid DTC P1860.
TP angle is greater than 20%.
Engine speed is greater than 500 rpm and less than
3,000 rpm.
Engine vacuum is between 0 and 70 kPa.
Commanded gear is not 1st.
Gear range is D4.
TCC is commanded ªoffº.
No TCC Stuck off DTC P1870.TCC slip speed is between ±20 and 40 rpm for 2
seconds.
Vehicle speed is greater than 25 km/h (15 mph) and
less than 120 km/h (75 mph).
Speed ratio is greater than 0.9 and less than 2.0.
Action Taken When The DTC Sets
For lamp illuminate refer to DTC type definition (type
B).
Inhibit TCC engagement.
Conditions For Clearing The MIL/DTC
The PCM will turn off the MIL and CHECK TRANS
Lamp after three consecutive ignition cycles without a
failure reported.
The DTC can be cleared from the PCM history by
using a scan tool.
The DTC will be cleared from history when the vehicle
has achieved 40 warmup cycles without a failure
reported.
The PCM will cancel the DTC default actions when
the fault no longer exists and the ignition is cycled ªoffº
long enough to power down the PCM.
Page 1744 of 2100
TRANSMISSION CONTROL SYSTEM (4L30±E)7A1±57
Diagnostic Aids
If the TCC is mechanically stuck ªonº with the parking
brake applied and any gear range selected, the TCC
fluid will mechanically apply the TCC, possibly
causing an engine stall.
Test Description
The number below refers to the step number on the
diagnostic chart:
3. This test checks the mechanical state of the TCC.
(When the PCM commands the TCC solenoid ªoffº,
the slip speed should increase).
DTC P0742 Torque Converter Clutch (TCC) System Stuck On
StepActionYe sNo
1Were you sent here from the ªPowertrain On±Board Diagnostic
(OBD) System Checkº?
Go to Step 2
Go to OBD
System Check
Refer to
Driveability and
Emissions in
Engine section
21. Install the scan tool.
2. With the engine ªoffº, turn the ignition switch ªonº.
NOTE: Before clearing DTC(s), use the scan tool to record ªFreeze
Frameº and ªFailure Recordsº for reference, as data will be lost
when the ªClear Infoº function is used.
3. Record the DTC ªFreeze Frameº and ªFailure Recordsº.
4. Using the scan tool, verify the ªTP Sensorº operation.
Are the ªTP Sensorº values within 0.6 ± 5.0 volts?
Go to Step 3
Go to Diagnostic
Aids
3Drive the vehicle in the D4 drive range in fourth gear under steady
acceleration, with a TP angle greater than 20%.
Does the scan tool display ªTCC Slip Speedº between ±30 and
+30 rpm, while the displayed TCC solenoid state is ªoffº?
Go to Step 4
Go to Diagnostic
Aids
4The TCC is mechanically stuck ªonº. Check the following items:
Clogged exhaust orifice in the TCC solenoid.
Converter clutch apply valve stuck in the apply position.
Misaligned or damaged valve body gasket.
Restricted release passage.
Was a problem found and corrected?
Go to Step 5Ð
51. After the repair is complete, use the scan tool to select ªDTCº,
then ªClear Infoº function and ensure the following conditions
are met:
TCC slip speed must be between 200 and 2,500 rpm for 4
seconds.
2. Review the scan tool ªDTC Infoº.
Has the last test failed or is the current DTC displayed?
Begin diagnosis
again
Go to
Step 1
Repair verified
Exit DTC table
Page 1747 of 2100
7A1±60
TRANSMISSION CONTROL SYSTEM (4L30±E)
DTC P0751 Shift Solenoid A Performance (Stuck Off)
D07RT011
Circuit Description
The shift solenoid A is used to control fluid flow acting on
the 1±2 and 3±4 shift valves. The solenoid is a normally
close exhaust valve that is used with the shift solenoid B
to allow four different shifting combinations.
The DTC detects when there is only a 1±1±4±4 shift
pattern depending on the state of the mechanical failure
instead of a 1±2±3±4 shift pattern. This is a type ªBº DTC.
Conditions For Setting The DTC
No ETC DTCs.
No OSS DTCs P0722 or P0723.
No TCC solenoid DTCs P0742, P1860, P1870.
No shift solenoid A DTC P0753.
No shift solenoid B DTC P0758.
Gear range is D4.
Transmission temperature is between 20 and 130C
(68 and 266F).
Output speed is greater than 375 rpm.
No range code P0705, P0706.
No torque code (to be confirmed).
Engine run for more 0 seconds and not influed cut-off
(to be confirmed).
All the above conditions have been met and the
combination of conditions 1, 2 occur two consecutive
times.
Condition 1:
2nd gear is commanded for . 1 second.
40 3 Engine Torque 3 400 N´m
Speed ratio . 0.6
Throttle position . 10 %
800 3 TCC Slip 3 4000 rpm
2.75 3 Modeled Ratio 3 3.2 for 1 second.
Condition 2:
3rd gear is commanded for . 1 second.
40 3 Engine Torque 3 400 N´m
Throttle position . 10 %
±8000 3 TCC Slip 3 8000 rpm
Speed ratio . 0.45
0.62 3 Modeled Ratio 3 0.92 for 3 second.
Action Taken When the DTC Sets
Maximum line pressure.
For lamp illuminate refer to
DTC type definition (type
B).
Turn Force Motor OFF.
Conditions For Clearing The The MIL/DTC
The PCM will turn off the MIL and CHECK TRANS
Lamp after three consecutive ignition cycles without a
failure reported.
The DTC can be cleared from the PCM history by
using a scan tool.
The DTC will be cleared from history when the vehicle
has achieved 40 warmup cycles without a failure
reported.
The PCM will cancel the DTC default actions when
the fault no longer exists and the ignition is cycled ªoffº
long enough to power down the PCM.
Diagnostic Aids
Verify that the transmission meets the specifications
in the 4L30±E shift speed chart.
Other internal transmission failures may cause more
than one shift to occur.
Page 1749 of 2100
7A1±62
TRANSMISSION CONTROL SYSTEM (4L30±E)
DTC P0752 Shift Solenoid A Performance (Stuck On)
D07RT011
Circuit Description
The shift solenoid A is used to control fluid flow acting on
the 1±2 and 3±4 shift valves. The solenoid is a normally
close exhaust valve that is used with the shift solenoid B
to allow four different shifting combinations.
The DTC detects when there is only a 2±2±3±3 shift
pattern depending on the state of the mechanical failure
instead of a 1±2±3±4 shift pattern. This is a type ªBº DTC.
Conditions For Setting The DTC
No ETC DTCs.
No OSS DTCs P0722 or P0723.
No TCC solenoid DTC P0742, P1860, P1870.
No shift solenoid A DTC P0753.
No shift solenoid B DTC P0758.
Gear range is D4.
Output speed is greater than 375 rpm.
Transmission temperature is between 20 and 130C
(68 and 266F).
No range code P0705, P0706.
No torque code (to be confirmed).
Engine run for more 0 seconds and not influed cut-off
(to be confirmed).
All the above conditions have been met and the
combination of condition 1, 2 occur two consecutive
times.
Condition 1:
1st gear is commanded for . 1 sec
40 3 Engine Torque 3 400 N´m
Throttle positon . 10%
±8000 3 TCC slip 3 8000 rpm
Transmission out speed . 375 rpm
Speed ratio . 0.3
1.5 3 Modeled Ratio 3 2.4 for 0.687 seconds
Condition 2:
4th Gear is commanded for . 1 sec.
40 3 Engine Torque 3 400 N´m
Trottle position . 10%
±8000 3 TCC slip 3 8000 rpm
Speed ratio . 0.6
0.92 3 Modeled Ratio 3 1.5 for 7 seconds
Action Taken When the DTC Sets
Maximum line pressure.
For lamp illuminate refer to
DTC type definition (type
B).
Turn Force Motor OFF.
Conditions For Clearing The The MIL/DTC
The PCM will turn off the MIL and CHECK TRANS
Lamp after three consecutive ignition cycles without a
failure reported.
The DTC can be cleared from the PCM history by
using a scan tool.
The DTC will be cleared from history when the vehicle
has achieved 40 warmup cycles without a failure
reported.
The PCM will cancel the DTC default actions when
the fault no longer exists and the ignition is cycled ªoffº
long enough to power down the PCM.
Diagnostic Aids
Verify that the transmission meets the specifications
in the 4L30±E shift speed chart.
Other internal transmission failures may cause more
than one shift to occur.
Page 1751 of 2100
7A1±64
TRANSMISSION CONTROL SYSTEM (4L30±E)
DTC P0753 Shift Solenoid A Electrical
D07R200010
Circuit Description
The shift solenoid A is a simple on/off solenoid
located in the main case valve body. The solenoid is
the normally closed type. In second or third gear the
Powertrain Control Module (PCM) energizes the
solenoid to open a fluid inlet port. When the port is
open, fluid pressure actuates the shift valve.
The solenoid is activated by a current. This current is
produced by applying a voltage to one side (the High
side) and a ground to the other side (Low side).
The High Side Driver (HSD) is a circuit of the PCM
that acts as a switch between the solenoids and the
supply voltage. The High side of the solenoid is
permanently supplied with voltage, except in
BACKUP MODE or when ignition is off the HSD is
turned off.
This DTC detects a continuous open or short to ground in
the shift solenoid A circuit or the shift solenoid A. This is a
type ªBº DTC.
Conditions For Setting The DTC
Ignition is ªonº, Engine ªrunº.
Battery voltage is between 10 and 16 volts.
The PCM commands the solenoid ªonº and the
voltage remains high (B+), or the PCM commands
the solenoid ªoffº and the voltage remains low (zero
volts).
All conditions met for 0.84 ± 1.0 seconds.
Action Taken When The DTC Sets
Maximum line pressure.
Immediate landing to 4th gear.
Inhibit TCC engagement.
For lamp illuminate refer to
DTC type definition (type
B).
Conditions For Clearing The MIL/DTC
The PCM will turn off the MIL and CHECK TRANS
Lamp after three consecutive ignition cycles without a
failure reported.
The DTC can be cleared from the PCM history by
using a scan tool.
The DTC will be cleared from history when the vehicle
has achieved 40 warmup cycles without a failure
reported.
The PCM will cancel the DTC default actions when
the fault no longer exists and the ignition is cycled ªoffº
long enough to power down the PCM.
Diagnostic Aids
Inspect the wiring for poor electrical connection at the
PCM and at the transmission 7-way connector. 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.
Page 1754 of 2100
TRANSMISSION CONTROL SYSTEM (4L30±E)7A1±67
DTC P0756 Shift Solenoid B Performance (Stuck Off)
D07RT011
Circuit Description
The shift solenoid B is used to control fluid flow acting on
the 2±3 shift valves. The solenoid is a normally open
exhaust valve that is used with the shift solenoid A to allow
four different shift combinations.
This DTC detects when there is only a 4-3-3-4 shift
pattern depending on the state of the mechanical failure
instead of a 1-2-3-4 shift pattern. This is a type ªBº DTC.
Conditions For Setting The DTC
No ETC DTCs.
No OSS DTCs P0722 or P0723.
No TCC solenoid DTCs P0742, P1860, P1870.
No shift solenoid DTCs P0753, P0758.
Gear range is D4.
Output speed is greater than 375 rpm.
Transmission fluid temperature is between 20 and
130C (68 and 266F).
No range code P0705, P0706.
No torque code (to be confirmed).
Engine run for more 0 seconds and influed cut-off (to
be confirmed).
All the above conditions have been met and the
combination of condition 1, 2 occur two consecutive
times.
Condition 1:
1st gear is commanded for . 1 second
40 3 Engine Torque 3 400 N´m
Throttle position . 10 %
±2300 3 TCC Slip 3 200 rpm.
Transmission output speed . 400 rpm
Speed ratio . 0.3
0.60 3 Modeled Ratio 3 1.49 for 1 second.
Condition 2:
2nd gear is commanded for . 1 second
40 3 Engine Torque 3 400 N´m
Throttle position . 10 %
±8000 3 TCC Slip 3 8000 rpm.
Speed ratio . 0.6
0.92 3 Modeled Ratio 3 1.5 for 0.687 second.
Action Taken When the DTC Sets
Maximum line pressure.
For lamp illuminate refer to
DTC type definition (type
B).
Turn Force Motor OFF.
Conditions For Clearing The MIL/DTC
The PCM will turn off the MIL and CHECK TRANS
Lamp after three consecutive ignition cycles without a
failure reported.
The DTC can be cleared from the PCM history by
using a scan tool.
The DTC will be cleared from history when the vehicle
has achieved 40 warmup cycles without a failure
reported.
The PCM will cancel the DTC default actions when
the fault no longer exists and the ignition is cycled ªoffº
long enough to power down the PCM.
Diagnostic Aids
Verify that the transmission meets the specifications
in the 4L30-E shift speed chart.
Other internal transmission failures may allow more
than one shift to occur.