2002 ISUZU AXIOM Service Repair Manual

radio controls oil level power steering fluid remote control coolant temperature ESP

Popular search:

air bleeding service interval reset sensor auxiliary battery refrigerant type battery location display

Load previous 8 pages

Page 1065 of 2100

ISUZU AXIOM 2002 Service Repair Manual 6E±98
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Starter Control System Check
StepNo Ye s Value(s) Action
16Repair the circuit as necessary.
Is the action complete?
ÐVerify repairÐ
17Che

Page 1066 of 2100

ISUZU AXIOM 2002 Service Repair Manual 6E±99
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Starter Control System Check
StepNo Ye s Value(s) Action
27Check the engine start times.
Is the engine start time less than specified value

Page 1067 of 2100

ISUZU AXIOM 2002 Service Repair Manual 6E±100
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Engine Cranks But Will Not Run
060R200083

Page 1068 of 2100

ISUZU AXIOM 2002 Service Repair Manual 6E±101
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
060R200075

Page 1069 of 2100

ISUZU AXIOM 2002 Service Repair Manual 6E±102
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Circuit Description
The electronic Ignition system uses a coil -at-plug method
of spark distribution. In this type of ignition system, the
powertrai

6E±102
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Circuit Description
The electronic Ignition system uses a coil -at-plug method
of spark distribution. In this type of ignition system, the
powertrain control module (PCM) triggers the correct
driver outside the Ignition Current Sense System (ICSS),
which then triggers the correct ignition coil based on the
58X signal received from the crankshaft position sensor
(CKP). The spark plug connected to the coil fires when
the ICSS opens the ground circuit for the coil's primary
circuit.
During crank, the PCM monitors the CKP 58X signal. The
CKP signal is used to determine which cylinder will fire
first. After the CKP 58X signal has been processed by the
PCM, it will command all six injectors to allow a priming
shot of fuel for all the cylinders. After the priming, the
injectors are left ªOFFº during the next six 58X reference
pulses from the CKP. This allows each cylinder a chance
to use the fuel from the priming shot. During this waiting
been received by the PCM. The ION sensor signal allows
the PCM to operate the injectors sequentially based on
camshaft position. If the camshaft position signal is not
present at start - up, the PCM will begin sequential fuel
delivery with a 1 -in-6 chance that fuel delivery is correct.
The engine will run without a ION sensor signal, but will
set a DTC code.
Diagnostic Aids
An intermittent problem may be caused by a poor
connection, rubbed - through wire insulation or a wire
broken inside the insulation. Check for the following
items:
Poor connection or damaged harness-Inspect the
PCM harness and connectors for improper mating,
broken locks, improperly formed or damaged
terminals, poor terminal-to-wire connection, and
damaged harness.
Faulty engine coolant temperature sensor-Using a
Tech 2, compare engine coolant temperature with
intake air temperature on a completely cool engine.
Engine coolant temperature should be within 10 C of
intake air temperature. If not, replace the ECT sensor.
Test Description
Number(s) below refer to the step number(s) on the
Diagnostic Chart.
5. An obvious cause of low fuel pressure would be an
empty fuel tank.
6. The engine will easily start and run if a few injectors
are disabled. It is not necessary to test all injectors
at this time since this step is only a test to verify that
all of the injectors have not been disabled by fuel
contamination.
7. A blinking test light verifies that the PCM is
monitoring the 58X crankshaft reference signal and
is capable of activating the injectors. If there is an
open or shorted driver circuit, DTCs 201 ± 206 and
a misfire DTC 300 ± 306 should be set.
19. By using a spark tester, each ignition coil's ability to
produce 25,000 volts is verified.
25. If there is an open or shorted driver circuit, DTCs
201 ± 206 and a misfire DTC 301 ± 306 should be
set. All six injector driver circuits can be checked at
one time without removing the intake manifold if a J
39021 ± 95 test light is available. This is the
alternative procedure:
With the ignition ªOFFº, disconnect the gray
connector located at the rear of the air filter, attached
to a bracket on the purge canister.
Connect test light J 39021 ± 95 to the connector. Do
any of the light constantly illuminate or fail to blink
when the engine is cranked? If so, repair the short or
open circuit, or replace the PCM if indicated.
This procedure only tests the driver circuit as far as the
test connection, so step 31 is added to test the circuit all
the way to the injector.
Engine Cranks But Will Not Run
StepActionValue(s)Ye sNo
1Was the ªOn-Board Diagnostic (OBD) System Checkº
performed?
ÐGo to Step 2
Go to OBD
System
Check
2Check the ignition coil fuse, the engine fuse, and the
PCM fuse.
Was a fuse blown?
ÐGo to Step 3Go to Step 4
3Check for a short to ground and replace the fuse.
Is the action complete?
ÐVerify repairÐ

Page 1070 of 2100

ISUZU AXIOM 2002 Service Repair Manual 6E±103
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Engine Cranks But Will Not Run
StepNo Ye s Value(s) Action
41. Ignition ªOFFº, install a fuel pressure gauge at the
test fitting on the

6E±103
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Engine Cranks But Will Not Run
StepNo Ye s Value(s) Action
41. Ignition ªOFFº, install a fuel pressure gauge at the
test fitting on the fuel supply line in the engine
compartment. (Use a shop cloth to absorb any fuel
leakage while making the connection.)
2. Ignition ªONº, observe the fuel pressure.
Is the fuel pressure within the specified values, and
does it hold steady?
285 - 375 kPa
(43 ± 55 psi)
Go to Step 6Go to Step 5
5Is any fuel pressure indicated?
Ð
Go to Fuel
System
Electrical TestGo to Fuel
System
Diagnosis
6Install the switch box J 39021±2 at the injector test
connector and activate an injector.
Did the fuel pressure drop when the injector was
activated?
ÐGo to Step 7Go to Step 18
7Install an injector test light at the #2 cylinder injector
harness connector.
Does the light blink when the engine is cranked?
ÐGo to Step 8Go to Step 24
81. Ignition ª OFFº.
2. Disconnect the 11-pin connector at the ION sensing
module.
3. With a test light to B + , probe each of the 6 exposed
ION sensing module pins, one at a time, while the
engine is cranked. (Use the gray narrow Metri - Pak
W flexible female connector from the J - 35616 kit to
make the pin accessible.)
Does the light flash at each pin when the engine is
cranked?
ÐGo to Step 12Go to Step 9
91. Remove the 4-pin connector at the ION sensing
module.
2. Ignition ª ONº.
3. Use a test light at the harness connector to verify
that the module is being supplied with B + and
ground.
Was a problem found?
ÐGo to Step 10Go to Step 11
10Repair the open ignition feed circuit or ground circuit to
the ION sensing module.
Is the action complete?
ÐVerify repairÐ
11Repair the ION sensing module.
Is the action complete?
ÐVerify repairÐ
121. Reconnect the ION sensing module 11-pin
connector.
2. Remove the electrical connector from each coil.
3. With a test light to B+, probe each of the coil
connectors at the wire which runs to the ION
sensing module.
Does the light flash at each coil connector when the
engine is cranked?
ÐGo to Step 14Go to Step 13
13Check for an open circuit between the coil and ION
sensing module.
Is the action complete?
ÐVerify repairÐ

Page 1071 of 2100

ISUZU AXIOM 2002 Service Repair Manual 6E±104
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Engine Cranks But Will Not Run
StepNo Ye s Value(s) Action
141. Ignition ªONº.
2. While the coil connectors are disconnected, touch
each

6E±104
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Engine Cranks But Will Not Run
StepNo Ye s Value(s) Action
141. Ignition ªONº.
2. While the coil connectors are disconnected, touch
each coil connector's ignition feed terminal with a
grounded test light (the ignition feed wire is YEL
tracer).
Did the test light illuminate?
ÐGo to Step 16Go to Step 15
15Repair the open ignition feed circuit.
Is the action complete?
ÐVerify repairÐ
16While the coil connectors are disconnected, touch
each connector's secondary ground terminal with a
test light to B +. (The ground wires are black.)
Did the test light illuminate at each coil connector?
ÐGo to Step 18Go to Step 17
17Repair the open secondary ground circuit.
Is the action complete?
ÐVerify repairÐ
181. Test the fuel for contamination.
2. If a problem is found, clean the fuel system and
correct the contaminated fuel condition as
necessary. Replace the fuel filter and replace any
injectors that are not delivering fuel (see Injector
Balance Test).
Was a problem found?
ÐVerify repairGo to Step 19
191. Remove any ignition coil and install a spark tester at
the spark plug end of the coil.
2. Observe the tester while the engine is cranking.
Was a crisp, blue spark observed? Only one or two
sparks followed by no result is considered the same as
ªNo Sparkº.
ÐGo to Step 21Go to Step 20
20Replace the ignition coil, and return to Step 19 to test
the remaining coils.
Is the action complete?
ÐVerify repairÐ
21Repeat Step 19 for each coil. Remove only one coil at a
time, and reinstall each coil on its spark plug after
testing, but do not refasten coils with screws at this
time.
After all coils have passed the spark test, does the
engine start?
Ð
Refasten all
coils with
their screws
Go to Step 22
221. Remove the spark plugs from all cylinders.
2. Visually inspect the spark plug electrodes.
3. Replace any spark plugs with loose or missing
electrodes or cracked insulators.
Did your inspection reveal any spark plugs exhibiting
excessive fouling?
Ð
Correct the
fouling
condition
Go to Step 23

Page 1072 of 2100

ISUZU AXIOM 2002 Service Repair Manual 6E±105
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Engine Cranks But Will Not Run
StepNo Ye s Value(s) Action
23Refer to Engine Mechanical Diagnosis to diagnose the
following conditions:
F

Load next 8 pages

Page: < prev 1-10 ... 1033-1040 1041-1048 1049-1056 1057-1064 1065-1072 1073-1080 1081-1088 1089-1096 1097-1104 ... 2104 next >

fuse diagram key fuse suspension height adjustment fuse chart

Popular search:

fuse box diagram front differential glove box Door handle spare tire location odometer adding oil