check engine ISUZU AXIOM 2002 Service Repair Manual

6E±289
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
DTC P0353 ± Ignition 3 Control Circuit

 
StepNo Ye s Value(s) Action
11Check for an open ignition control circuit 3.
Was the ignition control circuit open?
ÐGo to Step 12Go to Step 13
12Repair the open ignition control circuit.
Is the action complete?
ÐVerify repairÐ
13Replace 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±291
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Diagnostic Aids
Check for the following conditions:

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

Damaged harness ± Inspect the wiring harness for
damage. If the harness appears to be OK, observe theTech 2 display related to DTC P0354 while moving the
connector and wiring related to the ignition system. A
change in the display will indicate the location of the
fault.
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.
DTC P0354 ± Ignition 4 Control Circuit

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 Record
conditions as noted.
4. Use a Tech 2 to monitor the ªDTCº information for
DTC P0354 until the DTC P0354 test runs.
5. Note the test result.
Does the Tech 2 indicate DTC P0354 failed this ignition
cycle?
ÐGo to Step 3
Go to
Diagnostic
Aids
3Check for faulty connection at ignition coil.
Was a problem found?
ÐVerify repairGo to Step 4
4Check for faulty connection at PCM connector.
Was a problem found?
ÐVerify repairGo to Step 5
51. Ignition ªONº, engine ªOFFº.
2. Back probe the ignition control circuit 4 at the ION
Sensing with a DVM positive lead with the negative
lead to ground.
Is the voltage near the specified value?
25-55 mVGo to Step 6Go to Step 9
61. Ignition ªONº, engine running.
2. Back probe the ignition control circuit at the ION
Sensing Module for the cylinder being tested.
Is the voltage in the specified range, rapidly toggling
back and forth to a reading 20-50 mV higher?
100-180 mVGo to Step 7Go to Step 13
71. Ignition ªOFFº.
2. Disconnect the 3-pin connector at the ignition coil.
3. Check ignition control circuit 4 voltage at the ignition
coil connector while cranking the engine.
Does the voltage measure between the specified
values?
200-1200 mVGo to Step 8Go to Step 11
8Replace the ignition coil.
Is the action complete?
ÐVerify repairÐ
91. Ignition ªOFFº.
2. Disconnect the PCM and the ignition coil.
3. Check ignition control circuit 4 for short to ground.
Was a problem found?
ÐVerify repairGo to Step 10
10Check ignition control circuit 4 for short to voltage.
Was a problem found?
ÐVerify repairGo to Step 13

6E±292
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
DTC P0354 ± Ignition 4 Control Circuit

 
StepNo Ye s Value(s) Action
11Check for an open ignition control circuit 4.
Was the ignition control circuit open?
ÐGo to Step 12Go to Step 13
12Repair the open in ignition control circuit.
Is the action complete?
ÐVerify repairÐ
13Replace 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±294
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Diagnostic Aids
Check for the following conditions:

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

Damaged harness ± Inspect the wiring harness for
damage. If the harness appears to be OK, observe theTech 2 display related to DTC P0355 while moving the
connector and wiring related to the ignition system. A
change in the display will indicate the location of the
fault.
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.
DTC P0355 ± Ignition 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
21. Ignition ªONº, engine ªOFFº.
2. Review and record Tech 2 Failure Records data.
3. Operate the vehicle within Failure Record
conditions as noted.
4. Use a Tech 2 to monitor the ªDTCº information for
DTC P0355 until the DTC P0355 test runs.
5. Note the test result.
Does the Tech 2 indicate DTC P0355 failed this ignition
cycle?
ÐGo to Step 3
Go to
Diagnostic
Aids
3Check for faulty connection at ignition coil.
Was a problem found?
ÐVerify repairGo to Step 4
4Check for faulty connection at PCM connector.
Was a problem found?
ÐVerify repairGo to Step 5
51. Ignition ªONº, engine ªOFFº.
2. Back probe the ignition control circuit 5 at the ION
Sensing Module with a DVM positive lead with the
negative lead to ground.
Is the voltage near the specified value?
25-55 mVGo to Step 6Go to Step 9
61. Ignition ªONº, engine running.
2. Back probe the ignition control circuit at the ION
Sensing Module for the cylinder being tested.
Is the voltage in the specified range, rapidly toggling
back and forth to a reading 20-50 mV higher?
100-180 mVGo to Step 7Go to Step 13
71. Ignition ªOFFº.
2. Disconnect the 3-pin connector at the ignition coil.
3. Check ignition control circuit 5 voltage at the ignition
coil connector while cranking the engine.
Does the voltage measure between the specified
values?
200-1200 mVGo to Step 8Go to Step 11
8Replace the ignition coil.
Is the action complete?
ÐVerify repairÐ
91. Ignition ªOFFº.
2. Disconnect the PCM and the ignition coil.
3. Check ignition control circuit 5 for short to ground.
Was a problem found?
ÐVerify repairGo to Step 10
10Check ignition control circuit 5 for short to voltage.
Was a problem found?
ÐVerify repairGo to Step 13

6E±295
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
DTC P0355 ± Ignition 5 Control Circuit

 
StepNo Ye s Value(s) Action
11Check for an open ignition control circuit 5.
Was the ignition control circuit open?
ÐGo to Step 12Go to Step 13
12Repair the open ignition control circuit.
Is the action complete?
ÐVerify repairÐ
13Replace 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±297
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Diagnostic Aids
Check for the following conditions:

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

Damaged harness ± Inspect the wiring harness for
damage. If the harness appears to be OK, observe theTech 2 display related to DTC P0356 while moving the
connector and wiring related to the ignition system. A
change in the display will indicate the location of the
fault.
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.
DTC P0356 ± Ignition 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
21. Ignition ªONº, engine ªOFFº.
2. Review and record Tech 2 Failure Records data.
3. Operate the vehicle within Failure Record
conditions as noted.
4. Use a Tech 2 to monitor the ªDTCº information for
DTC P0356 until the DTC P0356 test runs.
5. Note the test result.
Does the Tech 2 indicate DTC P0356 failed this ignition
cycle?
ÐGo to Step 3
Go to
Diagnostic
Aids
3Check for faulty connection at ignition coil.
Was a problem found?
ÐVerify repairGo to Step 4
4Check for faulty connection at PCM connector.
Was a problem found?
ÐVerify repairGo to Step 5
51. Ignition ªONº, engine ªOFFº.
2. Back probe the ignition control circuit 6 at the ION
Sensing Module with a DVM positive lead with the
negative lead to ground.
Is the voltage near the specified value?
25-55 mVGo to Step 6Go to Step 9
61. Ignition ªONº, engine running.
2. Back probe the ignition control circuit at the ION
Sensing Module for the cylinder being tested.
Is the voltage in the specified range, rapidly toggling
back and forth to a reading 20-50 mV higher?
100-180 mVGo to Step 7Go to Step 13
71. Ignition ªOFFº.
2. Disconnect the 3-pin connector at the ignition coil.
3. Check ignition control circuit 6 voltage at the ignition
coil connector while cranking the engine.
Does the voltage measure between the specified
values?
200-1200 mVGo to Step 8Go to Step 11
8Replace the ignition coil.
Is the action complete?
ÐVerify repairÐ
91. Ignition ªOFFº.
2. Disconnect the PCM and the ignition coil.
3. Check ignition control circuit 6 for short to ground.
Was a problem found?
ÐVerify repairGo to Step 10
10Check ignition control circuit 6 for short to voltage.
Was a problem found?
ÐVerify repairGo to Step 13

6E±298
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
DTC P0356 ± Ignition 6 Control Circuit

 
StepNo Ye s Value(s) Action
11Check for an open ignition control circuit 6.
Was the ignition control circuit open?
ÐGo to Step 12Go to Step 13
12Repair the open ignition control circuit.
Is the action complete?
ÐVerify repairÐ
13Replace 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±300
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS

The PCM will store conditions which were present
when the DTC was set as Freeze Frame and in the
Failure Records data.
Diagnostic Aids
Check for the following conditions:

Poor connection or damaged harness ± Inspect the
wiring harness for damage. If the harness appears to
be OK, observe the Actual EGR Position display on the
Tech 2 while moving connectors and wiring harnesses
related to the EGR valve. A change in the display will
indicate the location of the fault.

Ensure EGR valve is correctly mounted. See
On-Vehicle Service.
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.
NOTE: If the EGR valve shows signs of excessive heat,
check the exhaust system for blockage (possibly a
plugged catalytic converter) using the ªRestricted
Exhaust System Checkº.
Test Description
Number(s) below refer to the step number(s) on the
Diagnostic Chart
3. A malfunctioning MAP sensor can set an EGR DTC.
The MAP sensor could send a constant signal which
is not low enough to set a low MAP DTC. The
constant signal from the MAP sensor also may not
be high enough to set a high MAP DTC. This step
verifies that the MAP sensor is responding.

6E±301
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
DTC P0401 ± EGR Flow Insufficient

StepActionValue(s)Ye sNo
1Was the ªOn-Board Diagnostic (OBD) System Checkº
performed?
ÐGo to Step 2
Go to OBD
System
Check
2Is DTC P1404 also set?
Ð
Go to DTC
1404
Go to Step 3
31. Start the engine.
2. Monitor the MAP signal with a Tech 2 while idling.
3. While idling, jab the accelerator pedal about halfway
down and immediately let the engine return to idle.
Did the MAP value on the Tech 2 show an immediate
large change?
ÐGo to Step 5Go to Step 4
4Replace the MAP sensor.
Is the action complete?
ÐVerify repairÐ
51. Inspect the exhaust system for modification of
original installed parts or leaks.
2. If a problem was found, repair exhaust system as
necessary.
Was a condition present that required repair?
ÐGo to Step 8Go to Step 6
61. Remove the EGR valve.
2. Visually and physically inspect the pintle, valve
passages and the adapter for excessive deposits or
any kind of a restriction.
3. If a problem is found, clean or replace EGR system
components as necessary.
Was a condition present that required repair?
ÐGo to Step 8Go to Step 7
71. Remove the EGR inlet and outlet pipes from the
exhaust manifold and the intake manifold.
2. Inspect the manifold EGR ports and the EGR inlet
and outlet pipes for a blockage caused by excessive
deposits or other damage.
3. If a problem is found, correct the condition as
necessary.
Was a condition present that required repair?
ÐGo to Step 8
Refer to
Diagnostic
Aids
81. Review and record the Tech 2 Failure Records data.
2. Clear DTC and monitor the Tech 2 System Info
Screen while operating the vehicle as specified in
ªDiagnostic Aidsº.
3. Using a Tech 2, monitor ªDTCº info for DTC P0401
until the DTC P0401 test runs.
4. Note the test result.
Does the Tech 2 indicate DTC P0401 failed this
ignition?
ÐÐ
Repair
complete

6E±302
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Diagnostic Trouble Code (DTC) P0402 EGR Pintle Crank Error
060R200050
Circuit Description
The powertrain control module (PCM) monitors the EGR
valve pintle position input to ensure that the valve
responds properly to commands from the PCM, and to
detect a fault if pintle position is stuck open. If the PCM
detects a pintle position signal indicates more than 21.5%
and more than for 625 msec during cranking, the PCM will
set DTC P0402.
Conditions for Setting the DTC

Ignition voltage is between 11 and 16 volts.

At Engine revolution less than 600 RPM, EGR pintle
position indicates more than 21.0% and more than for
625 msecs.
Action Taken When the DTC Sets

The PCM will illuminate the malfunction indicator lamp
(MIL) after the second consecutive trip in which the
fault is detected.

The PCM will store conditions which were present
when the DTC was set as Freeze Frame and in 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 P0402 will clear after 40 consecutive
warm-up cycles have occurred without a fault.

DTC P0402 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:

Foreign material on EGR valve between pintle and
seat may cause EGR stuck open. Inspect foreign
material in EGR valve.

Excessive carbon deposit may cause unsmooth
operation of EGR valve shaft. Inspect for carbon
deposit and clean up inside of carbon deposit.

Poor connection or damaged harness±inspect the
wiring harness for damage If the harness appears to be
OK, observe the EGR actual position display on the
Tech 2 while moving connectors and wiring harnesses
related to EGR valve. A change in the display will
indicate the location of the fault.
NOTE: If the EGR valve shows signs of excessive heat,
check the exhaust system for blockage (possibly a
plugged catalytic converter) using the ªRestricted
Exhaust System Checkº.