2002 ISUZU AXIOM Service Repair Manual

wipers gas mileage key battery washer fluid rear entertainment wiper size

Page 1217 of 2100

ISUZU AXIOM 2002 Service Repair Manual 6E±250
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Diagnostic Trouble Code (DTC) P0205 Injector 5 Control Circuit
060R200023
Circuit Description
The powertrain control module (PCM) has six individual

6E±250
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Diagnostic Trouble Code (DTC) P0205 Injector 5 Control Circuit
060R200023
Circuit Description
The powertrain control module (PCM) has six individual
injector driver circuits. Each controls an injector. When
the driver circuit is grounded by the PCM, the injector is
activated. The PCM monitors the current in each driver
circuit. If the voltage is not what the PCM expects to
monitor on the circuit, a DTC is set. This DTC is also set if
an injector driver is shorted to voltage or if there is an open
circuit.
Conditions for Setting the DTC
The battery voltage is more than 9 volts.
Engine speed is more than 700 rpm.
The engine is turning, determined by the 58X
crankshaft position input signal.
The injector voltage does not equal the ignition voltage
when the injector is commanded ªOFFº or the injector
voltage does not equal 0 volts when the injector is
commanded ªONº.
The above conditions are met for 5 seconds.
Action Taken When the DTC Sets
The PCM will illuminate the malfunction indicator lamp
(MIL) the first time the fault is detected.
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 ªOFFº the MIL on the third
consecutive trip cycle in which the diagnostic has been
run and the fault is no longer present.
A history DTC P0205 will clear after 40 consecutive
warm-up cycles occur without a fault.
DTC P0205 can be cleared by using the Tech 2 ªClear
Infoº function or by disconnecting the PCM battery
feed.
Diagnostic Aids
An injector driver circuit that is open or shorted to voltage
will cause a DTC P0205 to set. It will also cause a misfire
due to an inoperative injector. A misfire DTC will also be
set indicating which cylinder is inoperative.
Long term and short term fuel trims that are excessively
high or low are a good indication that an injector is faulty.
Use Fuel Injector Coil Test Procedure to check for faulty
injectors.

Page 1218 of 2100

ISUZU AXIOM 2002 Service Repair Manual 6E±251
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Test Description
The number(s) below refer to the step number(s) on the
Diagnostic Chart.
3. This step determines if DTC P0205 is the result of a
ha

6E±251
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Test Description
The number(s) below refer to the step number(s) on the
Diagnostic Chart.
3. This step determines if DTC P0205 is the result of a
hard failure or an intermittent condition.
5. A special injector test connector is provided so that
the injectors can be electrically tested without
removal of the manifold.The test connector can be
identified by the blue connector lock which is
tethered to the wiring harness. If the light for
cylinder 5 is ªONº steady before cranking the engine
as well as while cranking the engine, then the
injector driver circuit is shorted to ground.
If the test light blinks while cranking, the PCM and
the wiring to the injectors are OK. The Fuel Injector
Coil Test Procedure will check if the injectors are
faulty.
R321058
7. Because the test light was ªONº steady, voltage to
the injector is OK, but the driver circuit is grounded
at all times. This step determines if the circuit is
shorted to ground or the PCM is faulty.
9. The reading should be about 12-14.
10.Locating the open in the harness or in the injector
will require removal of the manifold to provide
access.
DTC P0205 ± Injector 5 Control Circuit
StepActionValue(s)Ye sNo
1Was the ªOn-Board Diagnostic (OBD) System Checkº
performed?
ÐGo to Step 2
Go to OBD
System
Check
2Will the engine start?
ÐGo to Step 3
Go to Engine
Cranks But
Will Not Run
chart
31. Install the Tech 2. Clear the DTC.
2. Idle the engine for one minute.
Does DTC P0205 reset?
ÐGo to Step 5Go to Step 4
41. Review the Freeze Frame data with the ignition
ªONº and the engine ªOFFº and note the
parameters.
2. Operate the vehicle within the Freeze Frame
conditions as noted.
Does P0205 reset?
ÐGo to Step 5
Go to
Diagnostic
Aids
51. Engine ªOFFº.
2. Disconnect the injector test connector.
3. Install an injector test light J-39021-65 on injector
connector.
4. Crank the engine and note the light.
Does the cylinder 5 test light blink?
Ð
Go to Fuel
Injector Coil
Test
Procedure
Go to Step 6

Page 1219 of 2100

ISUZU AXIOM 2002 Service Repair Manual 6E±252
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
DTC P0205 ± Injector 5 Control Circuit
StepNo Ye s Value(s) Action
6 Note whether the injector test light for cylinder 5 was
ªOFFº or �

Page 1220 of 2100

ISUZU AXIOM 2002 Service Repair Manual 6E±253
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Diagnostic Trouble Code (DTC) P0206 Injector 6 Control Circuit
060R200023
Circuit Description
The powertrain control module (PCM) has six individual

6E±253
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Diagnostic Trouble Code (DTC) P0206 Injector 6 Control Circuit
060R200023
Circuit Description
The powertrain control module (PCM) has six individual
injector driver circuits. Each controls an injector. When
the driver circuit is grounded by the PCM, the injector is
activated. The PCM monitors the current in each driver
circuit. The voltage on each driver is monitored to detect
a fault. If the voltage is not what the PCM expects to
monitor on the circuit, a DTC is set. This DTC is also set if
an injector driver is shorted to voltage or if there is an open
circuit.
Conditions for Setting the DTC
The battery voltage is more than 9 volts.
Engine speed is more than 700 rpm.
The engine is turning, determined by 58X crankshaft
position input signal.
The injector voltage does not equal the ignition voltage
when the injector is commanded ªOFFº or the injector
voltage does not equal 0 volts when the injector is
commanded ªONº.
The above conditions are met for 5 seconds.
Action Taken When the DTC Sets
The PCM will illuminate the malfunction indicator lamp
(MIL) the first time the fault is detected.
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 ªOFFº the MIL on the third
consecutive trip cycle in which the diagnostic has been
run and the fault is no longer present.
A history DTC P0206 will clear after 40 consecutive
warm-up cycles occur without a fault.
DTC P0206 can be cleared by using the Tech 2 ªClear
Infoº function or by disconnecting the PCM battery
feed.
Diagnostic Aids
An injector driver circuit that is open or shorted to voltage
will cause a DTC P0206 to set. It will also cause a misfire
due to an inoperative injector. A misfire DTC will also be
set indicating which cylinder is inoperative.
Long term and short term fuel trims that are excessively
high or low are a good indication that an injector is faulty.
Use Fuel Injector Coil Test Procedure to check for faulty
injectors.

Page 1221 of 2100

ISUZU AXIOM 2002 Service Repair Manual 6E±254
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Test Description
The number(s) below refer to the step number(s) on the
Diagnostic Chart.
3. This step determines if DTC P0206 is the result of a
ha

6E±254
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Test Description
The number(s) below refer to the step number(s) on the
Diagnostic Chart.
3. This step determines if DTC P0206 is the result of a
hard failure or an intermittent condition.
5. A special injector test connector is provided so that
the injectors can be electrically tested without
removal of the manifold.The test connector can be
identified by the blue connector lock which is
tethered to the wiring harness. If the light for
cylinder 6 is ªONº steady before cranking the engine
as well as while cranking the engine, then the
injector driver circuit is shorted to ground.
If the test light blinks while cranking, the PCM and
the wiring to the injectors are OK. The Fuel Injector
Coil Test Procedure will check if the injectors are
faulty.
R321059
7. Because the test light was ªONº steady, voltage to
the injector is OK, but the driver circuit is grounded
at all times. This step determines if the circuit is
shorted to ground or the PCM is faulty.
9. The reading should be about 12-14.
10.Locating the open in the harness or in the injector
will require removal of the manifold to provide
access.
DTC P0206 ± Injector 6 Control Circuit
StepActionValue(s)Ye sNo
1Was the ªOn-Board Diagnostic (OBD) System Checkº
performed?
ÐGo to Step 2
Go to OBD
System
Check
2Will the engine start?
ÐGo to Step 3
Go to Engine
Cranks But
Will Not Run
chart
31. Install the Tech 2. Clear the DTC.
2. Idle the engine for one minute.
Does DTC P0206 reset?
ÐGo to Step 5Go to Step 4
41. Review the Freeze Frame data with the ignition
ªONº and the engine ªOFFº and note the
parameters.
2. Operate the vehicle within the Freeze Frame
conditions as noted.
Does P0206 reset?
ÐGo to Step 5
Go to
Diagnostic
Aids
51. Engine ªOFFº.
2. Disconnect the injector test connector.
3. Install an injector test light J-39021-65 on injector
connector.
4. Crank the engine and note the light.
Does the cylinder 6 test light blink?
Ð
Go to Fuel
Injector Coil
Test
Procedure
Go to Step 6

Page 1222 of 2100

ISUZU AXIOM 2002 Service Repair Manual 6E±255
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
DTC P0206 ± Injector 6 Control Circuit
StepNo Ye s Value(s) Action
6Note whether the injector test light for cylinder 6 was
ªOFFº or ª

Page 1223 of 2100

ISUZU AXIOM 2002 Service Repair Manual 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) si

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 ±7C (20F) and 110C
(230F).
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.

Page 1224 of 2100

ISUZU AXIOM 2002 Service Repair Manual 6E±257
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
DTC P0300 ± Engine Misfire Detected
StepActionValue(s)Ye sNo
1Was the ªOn-Board Diagnostic (OBD) System Checkº
performed?
ÐGo to Step 2
Go to O

6E±257
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
DTC P0300 ± Engine Misfire Detected
StepActionValue(s)Ye sNo
1Was the ªOn-Board Diagnostic (OBD) System Checkº
performed?
ÐGo to Step 2
Go to OBD
System
Check
21. Start the engine. Run the engine at idle.
2. Review and record the Tech 2 Freeze Frame data.
3. Operate the vehicle to duplicate the conditions
present when the DTC was set (as defined by the
Freeze Frame data).
4. Monitor the Tech 2 ªMisfire Cur. #º display for each
cylinder.
Is ªMisfire Cur. #º display increasing for any cylinder
(indicating a misfire currently occurring)?
ÐGo to Step 3
Refer to
Diagnostic
Aids
31. Visually and physically inspect the vacuum hoses
for splits, kinks, and improper connections.
2. If a problem is found, repair or replace the vacuum
hoses as necessary.
Did your inspection reveal a problem?
ÐVerify repair Go to Step 4
41. Visually and physically inspect the following areas
for vacuum leaks:
The intake manifold
The injector O-rings
The EGR adapter
The EGR feed pipes
ION Sensing Module
2. If a problem is found, repair the vacuum leak as
necessary.
Did your inspection reveal a vacuum leak?
ÐVerify repairGo to Step 5
51. Visually and physically inspect the crankcase
ventilation valve for improper installation or
damaged grommet.
2. If a problem is found, repair as necessary (refer to
Crankcase Ventilation System).
Did your inspection reveal a problem?
ÐVerify repairGo to Step 6
61. Inspect the MAF sensor inlet screen for damage or
for the presence of foreign objects that may partially
block the air flow sample through the MAF sensor.
2. If a problem is found, repair or replace the MAF
sensor as necessary.
Did your inspection of the MAF sensor reveal a
condition requiring repair or replacement?
ÐVerify repairGo to Step 7
71. Remove the EGR valve and visually/physically
inspect the valve to ensure that the pintle is not
sticking partially open. Also, inspect the EGR valve
pintle and seat for carbon deposits or burrs that may
interfere with the pintle closing completely.
2. If a problem is found, clean the EGR valve pintle and
seat or replace the EGR valve as necessary.
Did your inspection reveal a problem?
ÐVerify repairGo to Step 8

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