2002 ISUZU AXIOM ignition

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±132
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS

Poor connection at PCM-Inspect harness connectors
for backed out terminals, improper mating, broken
locks, improperly formed or damaged terminals, and
poor terminal to wire connection.

Damaged harness- Inspect the wiring harness for
damage. If the harness appears to be OK, observe the
Mass Air Flow (MAF) display on the Tech 2 while
moving connectors and wiring harnesses related to the
sensor.

Plugged intake air duct or filter element

A wide±open throttle acceleration from a stop should
cause the mass air flow displayed on a Tech 2 toincrease from about 3±6 g/s at idle to 100 g/s or greater
at the time of the 1±2 shift. If not, check for a restriction.
A change in the display will indicate the location of
the fault.
If DTC P0101 cannot be duplicated, the information
included in the Failure Records data can be useful in
determined vehicle mileage since the DTC was last
set.
If it is determined that the DTC occurs intermittently,
performing the DTC P001 Diagnostic Chart may
isolate the cause of the fault.
DTC P0101 ± MAF System Performance

StepActionValue(s)Ye sNo
1Was the ªOn-Board Diagnostic (OBD) System Checkº
performed?
ÐGo to Step 2
Go to OBD
System
Check
21. Ignition ªOFFº.
2. Disconnect the Mass Air Flow (MAF) Sensor
harness connector from the MAF Sensor.
3. Place an unpowered test lamp between the 12 volt
signal circuit and the ground circuit, both at the MAF
Sensor connector.
4. Ignition ªONº, EngineªOFFº.
Did the test lamp illuminate?
ÐGo to Step 6Go to Step 3
31. Ignition ªONº, Engine ªOFFº.
2. Using a Digital Voltmeter (DVM), check the 12 volt
signal circuit for the correct voltage.
Did the DVM indicate a value within the following
range?
11.5 to 12.5
Volt
Go to Step 5Go to Step 4
41. Ignition ªOFFº.
2. Check the 12 volt signal circuit for the following
conditions:

An open circuit

A short to ground
Was the problem found?
ÐVerify repairÐ
5Check the MAF ground circuit for the following
conditions:

An open circuit

A short to voltage
Was a problem found?
ÐVerify repairÐ
61. Ignition ªOFFº.
2. Check the MAF Sensor signal circuit between the
PCM and the MAF Sensor for the following
conditions:

An open circuit

A short to ground

A short to battery voltage
Was a problem found?
ÐVerify repairGo to Step 7

6E±135
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
about 3-6 g/second at idle to 100 g/second or greater
at the time of the 1-2 shift. If not, check for a restriction.
If DTC P0102 cannot be duplicated, the information
included in the Failure Records data can be useful in
determining vehicle mileage since the DTC was last set.
Test Description
Number(s) below refer to the step number(s) on the
Diagnostic Chart.2. This step verifies that the problem is present at idle.
4. A voltage reading of less than 4 or over 5 volts at the
MAF sensor signal circuit indicates a fault in the
wiring or a poor connection.
5. This verifies that ignition feed voltage and a good
ground are available at the MAF sensor.
DTC P0102 ± MAF Sensor Circuit Low Frequency

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.
2. With the engine idling, monitor ªMAF Frequencyº
display on the Tech 2.
Is the ªMAF Frequencyº below the specified value?
1.6 g/sGo to Step 3Go to Step 5
31. Ignition ªONº, engine ªOFFº.
2. Review and record Tech 2 Failure Records data.
3. Operate the vehicle within Failure Records
conditions as noted.
4. Using a Tech 2, monitor ªDTCº info for DTC P0102.
Does the Tech 2 indicate DTC P0102 failed this
ignition?
ÐGo to Step 4
Refer to
Diagnostic
Aids
41. Ignition ªOFFº.
2. Disconnect the MAF sensor connector.
3. Ignition ªONº, engine ªOFFº.
4. Using a DVM, measure voltage between the MAF
sensor signal circuit and battery ground.
Is the voltage near the specified value?
11.5±12 VGo to Step 5Go to Step 8
5Connect a test light between the MAF sensor ignition
feed and ground circuits at the MAF sensor harness
connector.
Is the test light ªONº?
ÐGo to Step 7Go to Step 6
6Connect a test light between the MAF sensor ignition
feed circuit and battery ground.
Is the test light ªONº?
ÐGo to Step 11Go to Step 7
71. Check for a poor connection at the MAF sensor.
2. If a poor connection is found, replace the faulty
terminal(s).
Was a poor connection found?
ÐVerify repairGo to Step 12
81. Ignition ªOFFº.
2. Disconnect the MAF sensor.
3. Disconnect the PCM connector for the MAF signal
circuit.
4. Ignition ªONº, engine ªOFFº.
5. With the DVM, measure the voltage between the
MAF signal terminal at the PCM and battery ground.
Is the voltage under the specified value?
0 VGo to Step 9Go to Step 10

6E±136
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
DTC P0102 ± MAF Sensor Circuit Low Frequency

 
StepNo Ye s Value(s) Action
91. Ignition ªOFFº.
2. Disconnect the PCM connector.
3. Ignition ªONº.
4. Check the MAF sensor signal circuit for a short to 5
volts.
Is the action complete?
ÐVerify repairÐ
101. Ignition ªOFFº.
2. Disconnect the PCM connector.
3. Ignition ªONº.
4. Check the MAF sensor signal circuit between the
PCM and the MAF sensor for an open, short to
ground, or short to the MAF ground circuit.
Is the action complete?
ÐVerify repairGo to Step 13
11Locate and repair the open in the ground circuit to the
MAF sensor.
Is the action complete?
ÐVerify repairÐ
12Locate and repair the open in the ignition feed circuit to
the MAF sensor.
Is the action complete?
ÐVerify repairÐ
13Replace the MAF sensor.
Is the action complete?
ÐVerify repairGo to Step 14
14Replace the PCM.
IMPORTANT:The replacement PCM must be
programmed. Refer to
On-Vehicle Service in
Powertrain Control Module and Sensors for
procedures.
And also refer to latest Service Bulletin.
Check to see if the Latest software is released or not.
And then Down Load the LATEST PROGRAMMED
SOFTWARE to the replacement PCM.
Is the action complete?
ÐVerify repairÐ

6E±139
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
DTC P0103 ± MAF Sensor Circuit High Frequency

StepActionValue(s)Ye sNo
1Was the ªOn-Board Diagnostic (OBD) System Checkº
performed?
ÐGo to Step 2
Go to OBD
System
Check
21. Ignition ªONº, engine ªOFFº.
2. Review and record Tech 2 Failure Records data.
3. Operate the vehicle within Failure Records
conditions as noted.
4. Using a Tech 2, monitor ªDTCº info for DTC P0103.
Does the Tech 2 indicate DTC P0103 failed this
ignition?
ÐGo to Step 3
Refer to
Diagnostic
Aids
31. Start the engine.
2. With the engine idling, monitor ªMAF Frequencyº
display on the Tech 2.
Is ªMAF Frequencyº above the specified value?
40g/sGo to Step 4Go to Step 7
41. Ignition ªOFFº.
2. Disconnect the MAF sensor connector.
3. Ignition ªONº, engine idling.
4. Using a Tech 2, monitor ªMAF Frequencyº.
Does the Tech 2 indicate a ªMAF Frequencyº at the
specified value?
0g/sGo to Step 5Go to Step 6
5Replace the MAF sensor.
Is the action complete?
ÐVerify repairGo to Step 8
61. Check the MAF harness for incorrect routing near
high voltage components (solenoids, relays,
motors).
2. If incorrect routing is found, correct the harness
routing.
Was a problem found?
ÐVerify repairGo to Step 7
71. With the engine idling, monitor ªMAF Frequencyº
display on the Tech 2.
2. Quickly snap open throttle to wide open throttle
while under a road load and record value.
Does the Tech 2 indicate ªMAF Frequencyº above the
specified value?
40g/sGo to Step 5Go to Step 8
8Replace the PCM.
IMPORTANT:The replacement PCM must be
programmed. Refer to
On-Vehicle Service in
Powertrain Control Module and Sensors for
procedures.
And also refer to latest Service Bulletin.
Check to see if the Latest software is released or not.
And then Down Load the LATEST PROGRAMMED
SOFTWARE to the replacement PCM.
Is the action complete?
ÐVerify repairÐ

6E±141
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS

Damaged harness ± Inspect the wiring harness for
damage. If the harness appears to be OK, observe the
MAP display on the Tech 2 while moving connectors
and wiring harnesses related to the sensor. A change
in the display will indicate the location of the fault.
If DTC P0106 cannot be duplicated, the information
included in the Failure Records data can be useful indetermining vehicle mileage since the DTC was last set.
If it is determined that the DTC occurs intermittently,
performing the DTC P1107 Diagnostic Chart may isolate
the cause of the fault.
DTC P0106 ± MAP System Performance

StepActionValue(s)Ye sNo
1Was the ªOn-Board Diagnostic (OBD) System Checkº
performed?
ÐGo to Step 2
Go to OBD
System
Check
21. Ignition ªONº, engine ªOFFº.
2. Review and record Tech 2 Failure Records data.
3. Operate the vehicle within Failure Records
conditions as noted.
4. Using a Tech 2, monitor ªDTCº info for DTC P0106.
Does the Tech 2 indicate DTC P0106 failed?
ÐGo to Step 4Go to Step 3
31. Check for the following conditions:

Vacuum hoses disconnected, damaged, or
incorrectly routed

Intake manifold vacuum leaks

Vacuum leaks at throttle body

Vacuum leaks at EGR valve flange and pipes

Crankcase ventilation valve faulty, missing or
incorrectly installed.
2. If a problem is found, repair as necessary.
Was a problem found?
ÐVerify repair
Refer to
Diagnostic
Aids
41. Disconnect the MAP sensor electrical connector.
2. Observe the MAP value displayed on the Tech 2.
Is the MAP value near the specified value?
11 kPaGo to Step 5Go to Step 13
51. Connect a test light between B+ and the MAP
sensor signal circuit at the MAP sensor harness
connector.
2. Observe the MAP value displayed on the Tech 2.
Is the MAP value near the specified value?
105 kPaGo to Step 6Go to Step 9
61. Jumper the 5 volt reference circuit and the MAP
signal circuit together at the MAP sensor harness
connector.
2. Observe the MAP value displayed on the Tech 2.
Is the MAP value near the specified value?
104 kPaGo to Step 7Go to Step 8
71. Ignition ªOFFº.
2. Disconnect the PCM and check the sensor ground
circuit for high resistance, an open between the
PCM and the MAP sensor, or for a poor connection
at the PCM.
3. If a problem is found, repair as necessary.
Was a problem found?
ÐVerify repairGo to Step 11

6E±142
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
DTC P0106 ± MAP System Performance

 
StepNo Ye s Value(s) Action
81. Check the 5 volt reference circuit for high
resistance, an open between the PCM and the MAP
sensor, or a poor connection at the PCM.
2. If a problem is found, repair as necessary.
Was a problem found?
ÐVerify repairGo to Step 10
91. Ignition ªOFFº.
2. Disconnect the PCM, and check the MAP sensor
signal circuit for high resistance, an open, a short to
ground, or a short to the sensor ground circuit.
3. If a problem is found, repair as necessary.
Was a problem found?
ÐVerify repairGo to Step 10
101. Check the MAP sensor signal circuit for a poor
connection at the PCM.
2. If a problem is found, repair as necessary.
Did the terminal require replacement?
ÐVerify repairGo to Step 14
111. Check for a poor connection at the MAP sensor.
2. If a problem is found, repair as necessary.
Was a problem found?
ÐVerify repairGo to Step 12
12Replace the MAP sensor.
Is the action complete?
ÐVerify repairÐ
131. Ignition ªOFFº, disconnected the PCM.
2. Ignition ªONº, check the MAP signal circuit for a
short to voltage or a short to the 5 volt reference
circuit.
3. If a problem is found, repair as necessary.
Was a problem found?
ÐVerify repairGo to Step 14
14Replace the PCM.
IMPORTANT:The replacement PCM must be
programmed. Refer to
On-Vehicle Service in
Powertrain Control Module and Sensors for
procedures.
And also refer to latest Service Bulletin.
Check to see if the Latest software is released or not.
And then Down Load the LATEST PROGRAMMED
SOFTWARE to the replacement PCM.
Is the action complete?
ÐVerify repairÐ

6E±143
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Diagnostic Trouble Code (DTC) P0107 MAP Sensor Circuit Low Voltage
060R200051
Circuit Description
The manifold absolute pressure (MAP) sensor responds
to changes in intake manifold pressure (vacuum). The
MAP sensor signal voltage to the powertrain control
module (PCM) varies from below 2 volts at idle (high
vacuum) to above 4 volts with the ignition ªONº, engine
not running or at wide-open throttle (low vacuum).
The MAP sensor is used to determine manifold pressure
changes while the exhaust gas recirculation (EGR) flow
test diagnostic is being run (refer to
DTC P0401), to
determine engine vacuum level for some other
diagnostics and to determine barometric pressure
(BARO). The PCM monitors the MAP signals for voltages
outside the normal range of the MAP sensor. If the PCM
detects a MAP signal voltage that is excessively low, DTC
P0107 will be set.
Conditions for Setting the DTC

No TP sensor DTCs present.

Engine is running.

Throttle angle is above 1% if engine speed is less than
1000 RPM.

Throttle angle is above 2% if engine speed is above
1000 RPM.

The MAP sensor indicates manifold absolute pressure
at or below 11 kPa for a total of approximately 10
seconds over a 16-second period.

Ignition voltage more than 11 volts.
Action Taken When the DTC Sets

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

The PCM will default to a BARO value of 79.3 kPa.

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 during which the diagnostic has
been run and the fault condition is no longer present.

A history DTC P0107 will clear after 40 consecutive
warm-up cycles have occurred without a fault.

DTC P0107 can be cleared by using the Tech 2 ªClear
Infoº function or by disconnecting the PCM battery
feed.
Diagnostic Aids
Check for the following conditions:

Check for intermittent codes.

The MAP sensor shares a 5 Volt reference with the
Fuel Tank Pressure Sensor. If these codes are also
set, it could indicate a problem with the 5 Volt reference
circuit .

The MAP sensor shares a ground with the Fuel Tank
Pressure Sensor, the ECT sensor, and the
Transmission Fluid Temperature sensor.

Poor connection at PCM ± Inspect harness connectors
for backed-out terminals, improper mating, broken