2002 ISUZU AXIOM TRANSMISSION FLUID TYPE

0B±8MAINTENANCE AND LUBRICATION
Recommended Fluids and Lubricants
USAGEFLUID/LUBRICANT
EngineAPI SE, SF, SG, SH or ILSAC GF-1 Engine oil (See oil
chart on the following page for proper viscosity)
Engine coolantMixture of water and good quality ethylene glycol base
type antifreeze.
Brake systemDOT-3 hydraulic brake fluid.
Power steering systemDEXRON) -III Automatic transmission fluid.
Automatic transmissionDEXRON) -III Automatic transmission fluid.
TOD SYSTEM (TOD system model only)DEXRON) -IIE or DEXRON) -III Automatic transmis-
sion fluid.
Rear axle and front axleGL-5 gear lubricant (Standard differential)
GL-5 Limited slip differential gear lubricant together
with limited slip differential lubricant additive (Part No.
8-01052-358-0) or equivalent (If equipped with optional
limited slip differential) (See oil chart in this section for
proper viscosity)
Hood latch assembly
a. Pivots and spring anchorEngine oil
b. Release pawlChassis grease
Hood and door hingesEngine oil
Chassis lubricationChassis grease
Parking brake cablesChassis grease
Front wheel bearingsMultipurpose grease
Shift on the fly systemGL-5 gear lubricant (SAE 75W-90)
Body door hinge pins and linkage, fuel door hinge, rear
compartment lid hingesEngine oil
Windshield washer solventWasher fluid
Key lock cylinderSynthetic light weight engine oil (SAE 5W-30)
Accelerator linkageChassis grease

6B±2
ENGINE COOLING (6VE1 3.5L)
General Description
030RW001
Legend
(1) Water Pump
(2) Thermostat
(3) Radiator
(4) Reserve Tank
(5) Cooling Fan
(6) Cylinder Block(7) Cylinder Head
(8) Right Bank
(9) Throttle Body
(10) Cylinder Block
(11) Cylinder Head
(12) Left Bank
(13) Heater
The cooling system is a pressurized Engine Coolant (EC)
forced circulation type which consists of a water pump,
thermostat cooling fan, radiator and other components.
The automatic transmission fluid is cooled by the EC in
the radiator.
Water Pump
The EC pump is a centrifugal impeller type and is driven
by a timing belt.
030RS001

TRANSMISSION CONTROL SYSTEM (4L30±E)7A1±1
AXIOM
TRANSMISSION
TRANSMISSION CONTROL SYSTEM (4L30±E)
CONTENTS
Service Precaution 7A1±2. . . . . . . . . . . . . . . . . . . . . .
General Description 7A1±2. . . . . . . . . . . . . . . . . . . . .
Electronic Control Diagram 7A1±3. . . . . . . . . . . . .
Powertrain Control Module (PCM) 7A1±4. . . . . . .
Control System Diagram 7A1±5. . . . . . . . . . . . . . .
Shift Control 7A1±6. . . . . . . . . . . . . . . . . . . . . . . . . .
Band Apply Control 7A1±6. . . . . . . . . . . . . . . . . . . .
Torque Converter Clutch Control
(Electronically Controlled Capacity
Clutch = ECCC) 7A1±6. . . . . . . . . . . . . . . . . . . . . .
Line Pressure Control 7A1±6. . . . . . . . . . . . . . . . . .
On±Board Diagnostic System 7A1±6. . . . . . . . . . .
Fail Safe Mechanism 7A1±6. . . . . . . . . . . . . . . . . . .
Torque Management Control 7A1±6. . . . . . . . . . . .
ATF Warning Control 7A1±6. . . . . . . . . . . . . . . . . . .
Reverse Lock Out Control 7A1±6. . . . . . . . . . . . . .
Downhill Control 7A1±6. . . . . . . . . . . . . . . . . . . . . . .
Uphill Control 7A1±6. . . . . . . . . . . . . . . . . . . . . . . . .
Shift Mode Control 7A1±7. . . . . . . . . . . . . . . . . . . . .
Gear Shift Control 7A1±8. . . . . . . . . . . . . . . . . . . . .
Winter Drive Mode 7A1±9. . . . . . . . . . . . . . . . . . . . .
Backup Mode 7A1±9. . . . . . . . . . . . . . . . . . . . . . . . .
Functions of Input / Output Components 7A1±10. .
Diagnosis 7A1±11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electronic Diagnosis 7A1±11. . . . . . . . . . . . . . . . . . .
Check Trans Indicator 7A1±11. . . . . . . . . . . . . . . . . .
Diagnostic Check 7A1±11. . . . . . . . . . . . . . . . . . . . . .
ªCheck Transº Check 7A1±12. . . . . . . . . . . . . . . . . .
Tech 2 OBD II Connection 7A1±13. . . . . . . . . . . . . .
Transmission Data 7A1±18. . . . . . . . . . . . . . . . . . . . .
OBD II Diagnostic Management System 7A1±19. .
16 ± Terminal Data Link Connector (DLC) 7A1±20.
Malfunction Indicator Lamp (MIL) 7A1±21. . . . . . . .
DTC Types 7A1±21. . . . . . . . . . . . . . . . . . . . . . . . . . .
Clear DTC 7A1±22. . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC Check 7A1±22. . . . . . . . . . . . . . . . . . . . . . . . . . .
PCM Precaution 7A1±22. . . . . . . . . . . . . . . . . . . . . . .
Information On PCM 7A1±22. . . . . . . . . . . . . . . . . . .
Intermittent Conditions 7A1±23. . . . . . . . . . . . . . . . .
Transmission And PCM Identification 7A1±23. . . . .
Diagnostic Trouble Code (DTC)
Identification 7A1±24. . . . . . . . . . . . . . . . . . . . . . . . .
DTC P0218 Transmission Fluid Over
Temperature 7A1±25. . . . . . . . . . . . . . . . . . . . . . . . . . . DTC P0705 Transmission Range Switch
(Mode Switch) Illegal Position 7A1±27. . . . . . . . . . . .
DTC P0706 Transmission Range Switch
(Mode Switch) Performance 7A1±30. . . . . . . . . . . . . .
DTC P0711 Transmission Fluid Temperature
(TFT) Sensor Performance 7A1±33. . . . . . . . . . . . . .
DTC P0712 Transmission Fluid Temperature
(TFT) Sensor Circuit Low Input 7A1±36. . . . . . . . . . .
DTC P0713 Transmission Fluid Temperature
(TFT) Sensor Circuit High Input 7A1±39. . . . . . . . . . .
DTC P0719 Brake Switch Circuit Low
(Stuck On) 7A1±42. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P0722 Automatic Transmission Output
Speed Sensor (OSS) Low Input 7A1±45. . . . . . . . . .
DTC P0723 Automatic Transmission Output
Speed Sensor (OSS) Intermittent 7A1±48. . . . . . . . .
DTC P0724 Brake Switch Circuit High
(Stuck Off) 7A1±51. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P0730 Gear Error Without Input Speed 7A1±53
DTC P0742 Torque Converter Clutch (TCC)
System Stuck On 7A1±56. . . . . . . . . . . . . . . . . . . . . . .
DTC P0748 Pressure Control Solenoid (PCS)
(Force Motor) Circuit Electrical 7A1±58. . . . . . . . . . .
DTC P0751 Shift Solenoid A Performance
(Stuck Off) 7A1±60. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P0752 Shift Solenoid A Performance
(Stuck On) 7A1±62. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P0753 Shift Solenoid A Electrical 7A1±64. . . . .
DTC P0756 Shift Solenoid B Performance
(Stuck Off) 7A1±67. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P0757 Shift Solenoid B Performance
(Stuck On) 7A1±69. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P0758 Shift Solenoid B Electrical 7A1±71. . . . .
DTC P1850 Brake Band Apply Solenoid
Malfunction 7A1±75. . . . . . . . . . . . . . . . . . . . . . . . . . . .
DTC P1860 TCC PWM Solenoid Electrical 7A1±79.
DTC P1870 Transmission Component Slipping
(TCC Stuck Off) 7A1±82. . . . . . . . . . . . . . . . . . . . . . . .
Circuit Diagram 7A1±84. . . . . . . . . . . . . . . . . . . . . . . . .
Parts Location 7A1±86. . . . . . . . . . . . . . . . . . . . . . . . . .
Harness Connector Faces 7A1±87. . . . . . . . . . . . . . . .
Transmission Fluid Temperature (TFT) Sensor
Specifications 7A1±89. . . . . . . . . . . . . . . . . . . . . . . . . .

7A1±24
TRANSMISSION CONTROL SYSTEM (4L30±E)
Diagnostic Trouble Code (DTC)
Identification
DTC
NUMBERDTC NAMEDTC TYPEMIL ªCHECK
ENGINEºªCHECK
TRANSº
P0218Transmission Fluid Over TemperatureD
P0705Transmission Range Switch (Mode Switch) Illegal
PositionD
P0706Transmission Range Switch (Mode Switch)
PerformanceD
P0711Transmission Fluid Temperature (TFT) Sensor
PerformanceD
P0712Transmission Fluid Temperature (TFT) Sensor
Circuit Low InputD
P0713Transmission Fluid Temperature (TFT) Sensor
Circuit High InputD
P0719Brake Switch Circuit Low (Stuck On)D
P0722Automatic Transmission Output Speed Sensor
(OSS) Low InputBONFlash
P0723Automatic Transmission Output Speed Sensor
(OSS) IntermittentBONFlash
P0724Brake Switch Circuit High (Stuck Off)D
P0730Gear Error Without Input SpeedCFlash
P0742Torque Converter Clutch (TCC) System Stuck OnBONFlash
P0748Pressure Control Solenoid (PCS) (Force Motor)
Circuit ElectricalCFlash
P0751Shift Solenoid A Performance (Stuck Off)BONFlash
P0752Shift Solenoid A Performance (Stuck On)BONFlash
P0753Shift Solenoid A ElectricalBONFlash
P0756Shift Solenoid B Performance (Stuck Off)BONFlash
P0757Shift Solenoid B Performance (Stuck On)BONFlash
P0758Shift Solenoid B ElectricalBONFlash
P1850Brake Band Apply Solenoid MalfunctionD
P1860TCC Solenoid ElectricalBONFlash
P1870Transmission Component Slipping (TCC Stuck
Off)BONFlash
DTC TYPEDEFINITION
BEmission related, turn on MIL (Check Engine) and flashing Check Trans after 2 consecutive trips
(Removal to confirmed)
CNon±emission related, flashing Check Trans on 1st failure
DNon±emission related, no lamps

TRANSMISSION CONTROL SYSTEM (4L30±E)7A1±25
DTC P0218 Transmission Fluid Over Temperature
D07R200004
Circuit Description
The Transmission Fluid Temperature (TFT) sensor is a
thermister that controls the signal voltage to the PCM.
The PCM supplies a 5±volt reference 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 fluid temperature warms to a
normal transmission operating temperature of 100
C
(212
F), the sensor resistance becomes less and the
voltage decreases to 1.5 to 2.0 volts.
This DTC detects a high transmission temperature for a
long period of time. This is a type ªDº DTC.
Conditions For Setting The DTC

No TFT DTCs P0712 or P0713.

TFT is greater than 135
C (275
F).

All conditions met for 21 seconds.
Action Taken When The DTC Sets

Hot mode TCC Shift Pattern.

The PCM will not illuminate the Malfunction Indicator
Lamp (MIL).

ATF Lamp ON. (TFT is greater than 145
C (293
F))

Disable E±side TCC OFF request.
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 warm±up 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 connections 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.

Check harness routing for a potential short to ground
in circuit RED/BLK.

Scan tool TFT sensor temperature should rise
steadily to about 100
C (212
F), then stabilize.

Check for a ªskewedº (mis±scaled) sensor by
comparing the TFT sensor temperature to the
ambient temperature after a vehicle cold soak. A
ªskewedº sensor can cause delayed garage shifts or
TCC complaints.

Check for a possible torque converter stator problem.

Verify customer driving habits, trailer towing, etc.
Test Description
The numbers below refer to the step numbers on the
diagnostic chart.
3. This test checks for a ªskewedº sensor or shorted
circuit.
4. This test simulates a TFT DTC P0713.

TRANSMISSION CONTROL SYSTEM (4L30±E)7A1±33
DTC P0711 Transmission Fluid Temperature (TFT) Sensor Performance
D07R200004
Circuit Description
The TFT sensor is a thermister 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 detects high signal voltage. As the
transmission fluid temperature increases to normal
operating temperature of 100
C (212
F), the sensor
resistance becomes less and the voltage decreases to
1.5 to 2 volts.
When the PCM detects a TFT sensor that remains at the
startup value, or a sensor that has a change delta of
greater than 20
C (36
F) less than 1 second, DTC P0711
sets. DTC P0711 is a type D.
Conditions For Setting The DTC

No VSS DTCs P0722 or P0723.

No Transmission Component Slipping DTC P1870.

Engine is running.

TFT is between 20 A/D (Analog/Digital) counts and
248 A/D counts.

TFT is between ±40
C (±40
F) and +21
C (69.8
F)
at engine startup.

Engine coolant temperature is greater than 70
C
(150
F).

Engine coolant temperature has changed by greater
than 50
C (90
F) since engine startup.

Vehicle speed has been greater than 5 mph for
greater than 410 seconds since engine startup
(cumulative timer).

TCC slip speed has been greater than 120 rpm for
greater than 410 seconds since engine startup
(cumulative timer).

Battery voltage is between 10 and 16 volts.
All of the above is true and either of the following occurs:

If the sensor is stuck, the TFT has not changed for
greater than 2 counts (from startup temperature) for
greater than 410 seconds.
If the sensor shows an unrealistic change, the TFT
exhibits a change delta of greater than 20
C (36
F),
greater than 14 times in 7 seconds.
Action Taken When The DTC Sets

Transmission default temperature will be:
80
C (176
F) if engine temperature code is set.
100
C (212
F) if engine temperature is warm.
80
C (176
F) if engine run time is greater than 5
minutes.
21
C (69.8
F) 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. Inspect the wiring for poor electrical
connections at the transmission 7-way connector.
Look for the following conditions:
a. A bent terminal
b. A backed out terminal
c. A damaged terminal
d. Poor terminal tension
e. A chafed wire
f. A broken wire inside the insulation

7A1±36
TRANSMISSION CONTROL SYSTEM (4L30±E)
DTC P0712 Transmission Fluid Temperature (TFT) Sensor Circuit Low Input
D07R200004
Circuit Description
The TFT sensor is a thermister 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.
The PCM detects high signal voltage. As the
transmission fluid temperature increases to the normal
operating temperature of 100
C (212
F), the sensor
resistance becomes less and the voltage decreases to
1.5 to 2 volts. With transmission fluid over temperature
and DTC P0218 also set, check the transmission cooling
system.
This DTC detects a continuous short to ground 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 less than 0.4 volts.

All conditions met for 20 seconds.
Action Taken When The DTC Sets

Transmission default temperature will be:
80
C (176
F) if engine temperature code is set.
100
C (212
F) if engine temperature is warm.
80
C (176
F) if engine run time is greater than 5
minutes.
21
C (69.8
F) 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

Check harness routing for a potential short to ground
in circuit RED/BLK. Scan tool TFT display should rise
steadily to about 100
C (212
F), then stabilize.

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.

The temperature to resistance value scale may be
used to test the TFT sensor at the various
temperature levels to evaluate the possibility of a
ªskewedº (mis±scaled) sensor.
A ªskewedº sensor could result in delayed garage
shifts or TCC complaints.

Verify customer driving habits, trailer towing, etc.
Test Description
The numbers below refer to the step numbers on the
diagnostic chart:
3. This test checks for a short to ground or a ªskewedº
sensor.
4. This test checks for an internal fault within the
transmission by creating an open.

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 100
C (212
F), 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:
80
C (176
F) if engine temperature code is set.
100
C (212
F) if engine temperature is warm.
80
C (176
F) if engine run time is greater than 5
minutes.
21
C (69.8
F) 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 100
C
(212
F), 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 146
C
(295
F) or greater, the PCM and wiring are OK.
5. This test checks the TFT sensor and internal wiring
harness.