2002 ISUZU AXIOM fuel type

6E±128
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
DTCIlluminate
RPL
(Reduced
Power
Lamp) Illuminate
MIL
(Check
Engine
Lamp) Type Description
P0201Injector 1 Control CircuitAYe sNo
P0202Injector 2 Control CircuitAYe sNo
P0203Injector 3 Control CircuitAYe sNo
P0204Injector 4 Control CircuitAYe sNo
P0205Injector 5 Control CircuitAYe sNo
P0206Injector 6 Control CircuitAYe sNo
P0300Engine Misfire DetectedBYe sNo
P0301Engine Misfire Detected Cylinder #1BYe sNo
P0302Engine Misfire Detected Cylinder #2BYe sNo
P0303Engine Misfire Detected Cylinder #3BYe sNo
P0304Engine Misfire Detected Cylinder #4BYe sNo
P0305Engine Misfire Detected Cylinder #5BYe sNo
P0306Engine Misfire Detected Cylinder #6BYe sNo
P0325ION Sensing ModuleBYe sNo
P0336CKP Sensor Circuit Range/Performance (58X)BYe sNo
P0337CKP Sensor Circuit No signal (58X)BYe sNo
P0351Ignition 1 Control CircuitAYe sNo
P0352Ignition 2 Control CircuitAYe sNo
P0353Ignition 3 Control CircuitAYe sNo
P0354Ignition 4 Control CircuitAYe sNo
P0355Ignition 5 Control CircuitAYe sNo
P0356Ignition 6 Control CircuitAYe sNo
P0401EGR Flow InsufficientBYe sNo
P0402EGR Flow ExcessiveBYe sNo
P0404EGR Range/Performance (Open Valve)BYe sNo
P0405EGR Sensor Circuit Low VoltageBYe sNo
P0406EGR Sensor Circuit High VoltageBYe sNo
P0420Catalyst System Low Efficiency (Bank 1)AYe sNo
P0430Catalyst System Low Efficiency (Bank 2)AYe sNo
P0440EVAP Control SystemBYe sNo
P0442EVAP Control System Small Leak DetectedBYe sNo
P0444EVAP Purge Control Circuit OpenDNoNo
P0445EVAP Purge Control Circuit ShortDNoNo
P0446EVAP Canister Vent Control MalfunctionBYe sNo
P0447EVAP Vent Solenoid Circuit OpenDNoNo
P0448EVAP Vent Solenoid Circuit ShortDNoNo
P0452EVAP Control System Tank Pressure Sensor Low InputBYe sNo
P0453EVAP Control System Tank Pressure Sensor High InputBYe sNo
P0456EVAP Control System Very Small Leak DetectedBYe sNo
P0461Fuel Level Sensor Circuit Range/PerformanceDNoNo

6E±129
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
DTCIlluminate
RPL
(Reduced
Power
Lamp) Illuminate
MIL
(Check
Engine
Lamp) Type Description
P0462Fuel Level Sensor Circuit Low Input VoltageBYe sNo
P0463Fuel Level Sensor Circuit High Input VoltageBYe sNo
P0464Fuel Level Sensor Noisy SignalDNoNo
P0502No VSS SignalBYe sNo
P0506Idle Speed Control RPM too LowBYe sNo
P0507Idle Speed Control RPM too HighBYe sNo
P0562System Voltage is LowDNoNo
P0563System Voltage is HighBYe sNo
P0565Cruise Main Switch Circuit ErrorDNoNo
P0566Cruise Cancel Switch Circuit ErrorDNoNo
P0567Cruise Resume Switch Circuit ErrorDNoNo
P0568Cruise Set Switch Circuit ErrorDNoNo
P0601PCM/ECM Memory ChecksumAYe sNo
P0602PCM/ECM Programming errorDNoNo
P0604PCM/ECM RAM errorDNoNo
P0606PCM/ECM Internal PerformanceDNoNo
P1106MAP Circuit Intermittent High Voltage)DNoNo
P1107MAP Circuit Intermittent Low Input VoltageDNoNo
P 1111IAT Circuit Intermittent High VoltageDNoNo
P1112IAT Circuit Intermittent Low Input VoltageDNoNo
P1114ECT Circuit Intermittent Low VoltageDNoNo
P1115ECT Circuit Intermittent High VoltageDNoNo
P1120TPS1 CircuitBYe sNo
P1125ETC Limit Performance ModeAYe sYe s
P1133O2 Sensor ± Too Few Rich/Lean and Lean/Rich Switches (Bank
1 Sensor 1)BYe sNo
P1134O2 Sensor ± Transition Switch Time ratio (Bank 1 Sensor 1)BYe sNo
P1153O2 Sensor ± Too Few Rich/Lean and Lean/Rich Switches (Bank
2 Sensor 1)BYe sNo
P1154O2 Sensor ± Transition Switch Time ratio (Bank 2 Sensor 1)BYe sNo
P1167Fuel supply System RICH During Decel Fuel Cut Off (Bank 1)DNoNo
P1169Fuel supply System RICH During Decel Fuel Cut Off (Bank 2)DNoNo
P1171Fuel supply System Lean During Power EnrichmentDNoNo
P1220TPS2 CircuitBYe sNo
P1221TPS1±TPS2 Correlation (Circuit Performance)DNoNo
P1271APS1±APS2 Correlation (Circuit Performance)DNoNo
P1272APS2±APS3 Correlation (Circuit Performance)DNoNo
P1273APS1±APS3 Correlation (Circuit Performance)DNoNo
P1275APS1 CircuitBYe sNo
P1280APS2 CircuitBYe sNo
P1285APS3 CircuitBYe sNo

6E±256
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Diagnostic Trouble Code (DTC) P0300 Engine Misfire Detected
Circuit Description
Misfire is monitored as a function of the combustion
quality (CQ) signals generated from the ION Sensing
Module. Combustion signals represent the degree of
combustion in each cylinder. Misfire is detected when the
combustion signal is below a predetermined value.
This DTC P0300 will determine if a multiple cylinder
misfire is occurring by monitoring the Combustion
Quality.
Conditions for Setting the DTC

None of the following DTCs occur: TP sensor, MAF
sensor, VSS, ECT sensor.

The engine speed is between 600 and 6250 RPM.

The system voltage is between 11 and 16 volts.

The engine temperature sensor (ECT) indicates an
engine temperature between ±7
C (20
F) and 110
C
(230
F).

Throttle angle is steady and throttle changes less than
2% per 125 milliseconds.
Action Taken When the DTC Sets

The PCM will ON the MIL after second trip with
detected the fault.

If the misfire is severe enough to cause possible
catalyst damage, the PCM will flash the MIL for as long
as the misfire remains at catalyst damaging levels.

The PCM will disable the TCC operation.

The PCM will store conditions which were present
when the DTC was set as Freeze Frame and in the
Failure Records data.
Conditions for Clearing the MIL/DTC

The PCM will turn the MIL ªOFFº on the third
consecutive trip cycle in which the diagnostic has been
run and the fault condition is no longer present.

A history DTC P0300 will clear after 40 consecutive
warm-up cycles occur without a fault.

DTC P0300 can be cleared by using the Tech 2 ªClear
Infoº function or by disconnecting the PCM battery
feed.
Diagnostic Aids
The Tech 2 display ªMisfire Cur. #1 through #6º can be
useful to determine whether the misfire is isolated to a
single cylinder.
Damaged or faulty ignition coil ± Check for cracks or
other damage.

Substitute a known good coil ± Swap the ignition coils
and retest. If the misfire follows the coil, replace the
ignition coil.
If the misfire is random, check for the following conditions:

System grounds ± Ensure all connections are clean
and properly tightened.

MAF ± A mass air flow (MAF) sensor output that
causes the PCM to sense a lower than normal air flow
will cause a lean condition.

Air induction system ± Air leaks into the induction
system which bypass the MAF sensor will cause a lean
condition. Check for disconnected or damaged
vacuum hoses, incorrectly installed or faulty PCV
valve, or for vacuum leaks at the throttle body, EGR
valve, and intake manifold mounting surfaces.

Fuel pressure ± Perform a fuel system pressure test.
A faulty fuel pump, plugged filter, or faulty fuel system
pressure regulator will contribute to a lean condition.

Injector(s) ± Perform an injector coil/balance test to
locate faulty injector(s) contributing to a lean or
flooding condition. In addition to the above test, check
the condition of the injector O-rings.

EGR ± Check for a leaking valve, adapter, or feed pipes
which will contribute to a lean condition or excessive
EGR flow.

Fuel quality ± Using fuel with the wrong octane rating
for the vehicle may cause driveability problems.
Although alcohol-enhanced fuels may raise the octane
rating, the fuel's ability to turn into vapor in cold
temperatures deteriorates. This may affect the cold
driveability of the engine. The Reid Vapor Pressure of
the fuel can also create problems in the fuel system,
especially during the spring and fall when changes by
the refineries may not coincide with changes in the
weather.

Vehicle marshalling ± The transportation of new
vehicles from the assembly plant to the dealership can
involve as many as 60 key cycles within 2 to 3 miles of
driving. This type of operation contributes to the fuel
fouling of the spark plugs and will turn on the MIL with
a P0300 Misfire DTC.
Reviewing the Failure Records vehicle mileage since the
diagnostic test last failed may help determine how often
the condition that caused the DTC to be set occurs. This
may assist in diagnosing the condition.

6E±552
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
4. If the problem was found, adjust as necessary.
101RY00011
Fuel Filler Cap
General Description
The fuel filler cap includes a vacuum valve and a pressure
valve.
If high vacuum or high pressure occurs in the fuel tank,
each valve works to adjust the pressure in order to
prevent damage to the tank.
TS23767
Inspection Procedure
NOTE: Replace the fuel filler cap with the same type of
filler cap that was originally installed on the vehicle.

Check the seal ring in the filler cap for any abnormality
and for seal condition.

Replace the filler cap if any abnormality is found.
Fuel Filter
Removal Procedure
1. Disconnect the negative battery cable.
2. Remove the fuel filler cap.
041RY00001
3. Disconnect the fuel hose from the fuel filter on the
engine side.
4. Disconnect the fuel hose from the fuel filter on the fuel
tank side.
5. Remove the bolt on the fuel filter holder.
041RW003
Legend
(1) Fuel Hose
(2) Fuel Filter Fixing Bolt
(3) Fuel Filter
6. Remove the fuel filter.

6E±554
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Fuel Injectors
Removal Procedure
NOTE: If the fuel injectors are leaking, the engine oil may
be contaminated with fuel. Check the oil for signs of
contamination and change the oil and the filter if
necessary.
NOTE: Use care in removing the fuel injectors in order to
prevent damage to the fuel injector electrical connector
pins or the fuel injector nozzles. The fuel injector is an
electrical component and should not be immersed in any
type of cleaner as this may damage the fuel injector.
IMPORTANT:Fuel injectors are serviced as a complete
assembly only.
1. Disconnect the negative battery cable.
2. Remove the common chamber. Refer to
Common
Chamber in Engine Mechanical
section.
3. Remove the fuel rail. Refer to
Fuel Rail section.
014RW164
4. Remove the injector retainer clip.
040RY00001
5. Remove the fuel injector assembly.
6. Remove the O-ring from the fuel injector.
7. Remove the O-ring backup from the fuel injector .
Inspection Procedure
1. Inspect the O-rings for cracks or leaks.
2. Replace worn or damaged O-rings.
3. Lubricate the new O-rings with engine oil before
installation.
Installation Procedure
1. Install the O-ring backup on the fuel injector.
2. Install the new O-ring on the fuel injector.
3. Install the fuel injector on the fuel rail.
040RY00001
4. Use new fuel injector retainer clips to retain the fuel
injector to the fuel rail.
5. Coat the end of the fuel injector with gasoline.

6E±557
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Fuel Rail Assembly
Removal Procedure
NOTE:

Do not attempt to remove the fuel inlet fitting on the
fuel rail. It is staked in place. Removing the fuel inlet
fitting will result in damage to the fuel rail or the
internal O-ring seal.

Use care when removing the fuel rail assembly in
order to prevent damage to the injector electrical
connector terminals and the injector spray tips.

Fittings should be capped and holes plugged during
servicing to prevent dirt and other contaminants from
entering open lines and passages.
IMPORTANT:An eight-digit identification number is
stamped on the side of the fuel rail. Refer to this number
when you service the fuel rail or when a replacement part
is required.
014RY00008Before removal, the fuel rail assembly may be cleaned
with a spray type engine cleaner. Follow the spray
package instructions. Do not immerse the fuel rails in
liquid cleaning solvent.
1. Depressurize the fuel system. Refer to Fuel Pressure
Relief Procedure in this Section.
2. Disconnect the negative battery cable.
3. Remove the engine cover.
4. Disconnect the throttle position sensor electrical
connector from throttle body.
5. Disconnect the connectors from manifold absolute
pressure sensor, solenoid valve, electric vacuum
sensing valve.
6. Disconnect the vacuum hose on canister VSV and
positive crankcase ventilation hose.
7. Remove the common chamber. Refer to the common
chamber in Engine Mechanical section.
1. Lift up carefully on the fuel injectors. Do not
separate the fuel injectors from the fuel rail.2. If an injector becomes separated from the fuel
rail, the infector O-ring seals and the retainer clip
must be replaced.
3. Drain residual fuel into an approved container.
014RW164
8. If removal of the fuel pressure regulator is necessary,
refer to
Fuel Pressure Regulator section.
9. If removal of the fuel injectors is necessary, refer to
Fuel Injectors section.
Installation Procedure
1. If the fuel injectors were removed, install them. Refer
to
Fuel Injectors section.
2. If the fuel pressure regulator was removed, install it.
Refer to
Fuel Pressure Regulator section.
3. Install the common chamber. Refer to common
chamber in engine Mechanical section.
014RW164
4. Connect the vacuum hose on Canister VSV and
positive crankcase ventilation hose.

6E±584
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
A continuous purge condition with no purge commanded
by the PCM will set a DTC P1441.
Poor idle, stalling and poor driveability can be caused by:

A malfunctioning purge solenoid.

A damaged canister.

Hoses that are split, cracked, or not connected
properly.
Enhanced Evaporative Emission Control
System
The basic purpose of the Enhanced Evaporative
Emissions control system is the same as other EVAP
systems. A charcoal-filled canister captures and stores
gasoline fumes. When the PCM determines that the time
is right, it opens a purge valve which allows engine
vacuum to draw the fumes into the intake manifold.
The difference between this and other systems is that the
PCM monitors the vacuum and/or pressure in the system
to determine if there is any leakage. If the PCM
determines that the EVAP system is leaking or not
functioning properly, it sets a Diagnostic Trouble Code
(DTC) in the PCM memory.
The enhanced EVAP system is required to detect
evaporative fuel system leaks as small as 0.020 in. (1.0
mm) between the fuel filler cap and purge solenoid. The
system can test the evaporative system integrity by
applying a vacuum signal (ported or manifold) to the fuel
tank to create a small vacuum. The PCM then monitors
the ability of the system to maintain the vacuum. If the
vacuum remains for a specified period of time, there are
no evaporative leaks and a PASS report is sent to the
diagnostic executive. If there is a leak, the system either
will not achieve a vacuum, or a vacuum cannot be
maintained. Usually, a failure can only be detected after a
cold start with a trip of sufficient length and driving
conditions to run the needed tests. The enhanced EVAP
system diagnostic will conduct up to eight specific
sub-tests to detect fault conditions. If the diagnostic fails
a sub-test, the PCM will store a Diagnostic Trouble Code
(DTC) to indicate the type of detected.

6F±2ENGINE EXHAUST (6VE1 3.5L)
General Description
150RW023
When inspecting or replacing exhaust system
components, make sure there is adequate clearance
from all points on the underbody to prevent overheating
the floor pan and possible damage to the passenger
compartment insulation and trim materials.
Check complete exhaust system and nearby body areas
and rear compartment lid for broken, damaged, missing
or mispositioned parts, open seams, holes, loose
connections or other deterioration which could permit
exhaust fumes to seep into the rear compartment or
passenger compartment. Dust or water in the rear
compartment may be an indication of a problem in one of
these areas. Any faulty areas should be corrected
immediately.
Hangers
Various types of hangers are used to support exhaust
system(s). These include conventional rubber straps,
rubber rings, and rubber blocks.
The installation of exhaust system supports is very
important, as improperly installed supports can cause
annoying vibrations which can be difficult to diagnose.
Three Way Catalytic Converter
The three way catalytic converter is an emission control
device added to the exhaust system to reduce pollutants
from the exhaust gas stream.
CAUTION: The catalytic converter requires the use
of unleaded fuel only.
Periodic maintenance of the exhaust system is not
required. If the vehicle is raised for other service, it is
advisable to check the condition of the complete exhaust
system.
A dual bed monolith catalytic converter is used in
combination with three way catalytic converter.
Catalytic Converter Types:
Three way (Reduction/Oxidation) catalyst
The catalyst coating on the three way (reduction)
converter contains platinum and rhodium which lowers
the levels of nitrous oxide (NOx) as well as hydrocarbons
(HC) and carbon monoxide (Co).
Gasket
The gasket must be replaced whenever a new exhaust
pipe, muffler or catalytic converter is installed.