sensor ISUZU AXIOM 2002 Service Repair Manual

6A±46
ENGINE MECHANICAL (6VE1 3.5L)
Engine Assembly
Removal
035R200001
1. Disconnect battery ground and positive cable.
2. Remove battery.
3. Make alignment mark on the engine hood and hinges
before removal in order to return the hood to original
position exactly.
4. Remove engine hood.
5. Drain radiator coolant.
6. Disconnect Ion sensing module harness connectors,
and manifold absolute pressure sensor harness
connectors from sensor on common chamber.
7. Disconnect throttle position sensor harness
connectors from throttle body.
8. Disconnect air duct with air cleaner cover.
9. Remove air cleaner assembly.
10. Disconnect canister vacuum hose.
11. Disconnect vacuum booster hose.
12. Disconnect three engine harness connectors.
13. Disconnect harness connector to transmission (left
front side of engine compartment), disconnect shift
on the fly harness connector from front side of front
axle and remove transmission harness bracket from
engine left side.
14. Disconnect ground cable between engine and frame.
15. Disconnect bonding cable connector on the back of
right dash panel.
16. Disconnect bonding cable terminal on the left bank.
17. Disconnect starter harness connector from starter.
18. Disconnect generator harness connector from
generator.
19. Disconnect coolant reserve tank hose from radiator.
20. Remove radiator upper and lower hoses.21. Remove upper fan shroud.
22. Remove cooling fan assembly four fixing nuts, then
the cooling fan assembly.
23. Move drive belt tensioner to loose side using wrench
then remove drive belt.
24. Remove power steering pump fixing bolts, then
power steering pump. Place the power steering pump
along with piping on the body side.
25. Remove air conditioning compressor fixing bolts from
bracket and place the compressor along with piping
on the body side.
26. Remove four O
2 sensor harness connectors (two
each bank) from exhaust front pipe.
27. Remove three exhaust pipe fixing nuts from each
bank.
28. Remove two exhaust pipe fixing nuts from each
exhaust pipe, then move exhaust pipe to rear side of
vehicle.
29. Remove flywheel dust covers.
30. Disconnect two heater hoses from engine.
31. Disconnect fuel hoses from right side of transmission.
CAUTION: Plug fuel pipes on engine side and fuel
hoses from fuel tank.
32. Remove transmission assembly. Refer to
Transmission section in this manual.
33. Support the engine by engine hoist.
34. Remove two left side engine mount fixing bolts from
engine mount on chassis side.
35. Remove two right side engine mount fixing bolts from
engine mount on chassis side.
36. Remove engine assembly.

6A±47
ENGINE MECHANICAL (6VE1 3.5L)
Installation
CAUTION: W h e n assembling the engine and
transmission, confirm that dowels have been
mounted in the specified positions at the engine
side.
NOTE: Take care that dowel positions are different
between the manual transmission and the automatic
transmission.
If the engine is assembled in the condition that the dowels
have not been mounted in the specified positions, the
transmission may be damaged.
012RS009
1. Install engine assembly. Tighten engine mount fixing
bolts to frame to the specified torque.
Torque: 41 N´m (30 lb ft)
2. Reconnect fuel hose to fuel pipe on engine.
3. Install transmission assembly. Refer to Transmission
section in this manual.
4. Reconnect two heater hoses to engine.
5. Install flywheel dust covers.
6. Install exhaust pipe and temporally tighten two (each
bank) rear exhaust flange nuts then tighten three stud
nuts (each bank) between exhaust manifold and
exhaust pipe, finally tighten rear side nuts to the
specified torque.
Torque:
Nuts: 43 N´m (32 lb ft)
Stud nuts: 67 N´m (49 lb ft)
150R200002
Legend
(1) Exhaust Front Pipe RH
(2) O
2 Sensor
150R200003
Legend
(1) O
2 Sensor
(2) Exhaust Front Pipe LH
7. Reconnect O2 sensor connector.
8. Install cooling fan assembly and tighten bolts/nuts to
the specified torque.
Torque : 22 N´m (16 lb ft) for fan pulley and fan
bracket.
Torque : 7.5 N´m (66.4 lb in) for fan and clutch
assembly.

6A±48
ENGINE MECHANICAL (6VE1 3.5L)
9. Install air conditioner compressor to engine and
tighten to the specified torque.
Torque :
M8 bolts : 22 N´m (16 lb ft)
M10 bolts : 43 N´m (32 lb ft)
10. Install power steering pump, tighten fixing bolt to the
specified torque.
Torque :
M8 bolts : 22N´m (16 lb ft)
M10 bolts : 46 N´m (34 lb ft)
11. Move drive belt tensioner to loose side using wrench,
then install drive belt to normal position.
850RW001
Legend
(1) Crankshaft Pulley
(2) Cooling Fan Pulley
(3) Tensioner
(4) Generator
(5) Air Conditioner Compressor
(6) Power Steering Oil Pump
(7) Idle Pulley
(8) Drive Belt
12. Install upper fan shroud.
13. Reconnect radiator upper and lower hoses.
14. Reconnect coolant reserve tank hose to radiator.
15. Reconnect generator harness connector.
16. Reconnect starter harness connector.
17. Reconnect bonding cable terminal on left bank
18. Reconnect bonding cable terminal on the back of right
dash panel.
19. Reconnect ground cable between engine and
chassis.
20. Reconnect harness connector to transmission and
install transmission harness bracket on engine left
side.
21. Reconnect three engine harness connectors.
22. Reconnect vacuum booster hose.
23. Reconnect canister vacuum hose.24. Install air cleaner assembly.
25. Reconnect air duct.
26. Reconnect throttle position sensor harness
connector.
025RY001
Legend
(1) Throttle Position Sensor Connector
(2) Throttle Valve Assembly
27. Reconnect manifold absolute pressure sensor
harness connectors.
28. Reconnect ion sensing module connectors as shown
in the illustration.
060RY00111
Legend
(1) Green Connector
(2) Blue Connector
(3) Identification Mark (6VE1 Engine Only)
29. Install engine hood to the original position.

Refer to installation procedure for Body section in
this manual.

6A±88
ENGINE MECHANICAL (6VE1 3.5L)
Torque Specifications
Ignition coil, Spark plug, Crankshaft position sensor and Under cover
E06R100001

6B±4
ENGINE COOLING (6VE1 3.5L)

Mixing ratio
Check the specific gravity of engine coolant in the
cooling system temperature ranges from 0
C to 50
C
using a suction type hydrometer, then determine the
density of the engine coolant by referring to the table.
B06RW003
Diagnosis
Engine Cooling Trouble
ConditionPossible causeCorrection
Engine overheatingLow Engine Coolant levelReplenish
Incorrect fan installedReplace
Thermo meter unit faultyReplace
Faulty thermostatReplace
Faulty Engine Coolant temperature
sensorRepair or replace
Clogged radiatorClean or replace
Faulty radiator capReplace
Low engine oil level or use of
improper engine oilReplenish or change oil
Clogged exhaust systemClean exhaust system or replace
faulty parts
Faulty Throttle Position sensorReplace throttle valve assembly
Open or shorted Throttle Position
sensor circuitRepair or replace
Damaged cylinder head gasketReplace
Engine overcoolingFaulty thermostatReplace
Engine slow to warm±upFaulty thermostatReplace
Thermo unit faultyReplace

6C±3 ENGINE FUEL (6VE1 3.5L)
When working on the fuel system, there are several
things to keep in mind:

Any time the fuel system is being worked on,
disconnect the battery ground cable except for those
tests where battery voltage is required.

Always keep a dry chemical (Class B) fire
extinguisher near the work area.

Replace all pipes with the same pipe and fittings that
were removed.

Clean and inspect ªOº rings. Replace if required.

Always relieve the line pressure before servicing any
fuel system components.

Do not attempt repairs on the fuel system until you
have read the instructions and checked the pictures
relating to that repair.

Adhere to all Notices and Cautions.
All gasoline engines are designed to use only unleaded
gasoline. Unleaded gasoline must be used for proper
emission control system operation.
Its use will also minimize spark plug fouling and extend
engine oil life. Using leaded gasoline can damage the
emission control system and could result in loss of
emission warranty coverage.
The vapor pressure sensor and vent solenoid valve for
vapor pressure sensor are used to detect abnormalities in
the evaporative emission control system.
The PCM decides whether there is an abnormality in the
evaporative emission control system based on vapor
pressure sensor signal.Fuel Metering
The Powertrain Control Module (PCM) is in complete
control of this fuel delivery system during normal driving
conditions.
The intake manifold function, like that of a diesel, is used
only to let air into the engine. The fuel is injected by
separate injectors that are mounted over the intake
manifold.
The Manifold Absolute Pressure (MAP) sensor measures
the changes in the intake manifold pressure which result
from engine load and speed changes, which the MAP
sensor converts to a voltage output.
This sensor generates the voltage to change
corresponding to the flow of the air drawn into the engine.
The changing voltage is transformed into an electric
signal and provided to the PCM.
With receipt of the signals sent from the MAP sensor,
Intake Air Temperature sensor and others, the PCM
determines an appropriate fuel injection pulse width
feeding such information to the fuel injector valves to
affect an appropriate air/fuel ratio.
The Multiport Fuel Injection system utilizes an injection
system where the injectors turn on at every crankshaft
revolution. The PCM controls the injector on time so that
the correct amount of fuel is metered depending on
driving conditions.
Two interchangeable ªOº rings are used on the injector
that must be replaced when the injectors are removed.
The fuel rail is attached to the top of the intake manifold
and supplies fuel to all the injectors.
Fuel is recirculated through the rail continually while the
engine is running. This removes air and vapors from the
fuel as well as keeping the fuel cool during hot weather
operation.
The fuel pressure control valve that is mounted on the fuel
rail maintains a pressure differential across the injectors
under all operating conditions. It is accomplished by
controlling the amount of fuel that is recirculated back to
the fuel tank based on engine demand.
See Section ªDriveability and Emissionº for more
information and diagnosis.

6C±6
ENGINE FUEL (6VE1 3.5L)
Fuel Pump
Fuel Pump and Associated Parts
140R200008
Legend
(1) Fuel Feed Port
(2) Fuel Tube/Quick Connector
(3) Fuel Return Port
(4) Fuel Pump and Sender (FPS) Assembly(5) Connector; Fuel Feed Pump
(6) Connector; Fuel Tank Pressure Sensor
(7) Retainer (Fuel Pump Lock)
(8) Fuel Tank Assembly
(9) Seal; Fuel Pump
Removal
CAUTION: When repair to the fuel system has been
completed, start engine and check the fuel system
for loose connection or leakage. For the fuel system
diagnosis, see Section ªDriveability and Emissionº.
1. Remove fuel tank assembly(8). Refer to ªFuel Tank
Removalº in this section.
2. Remove Fuel Tube/Quick Connector (2).
NOTE: Refer to ªFuel Tube/Quick Connector Fittingsº in
this section when performing any repairs.

6C±10
ENGINE FUEL (6VE1 3.5L)
Fuel Pump Relay
General Description
In order to control the fuel pump and sender (FPS)
operation, the FPS relay is provided. When the starter
switch is turned to ªONº position, the FPS relay operates
the FPS for 2 seconds.
When the key is turned to ªSTARTº position, the Engine
Control Module receives the reference pulse from the
Ignition Control Module and it operates the relay, again
causing the FPS to feed fuel.
Fuel Tank
Fuel Tank and Associated Parts
140R200006
Legend
(1) Fuel Tank Assembly
(2) Fuel Tank Fixing Bolt (QTY: 5)
(3) Fuel Tank Fixing Nut (QTY: 1)
(4) Separator Fixing Bolt (QTY: 2)
(5) Fuel Filler Hose(6) Fuel Vent Hose
(7) Fuel Feed Hose
(8) Fuel Return Hose
(9) Vapor Pressure Sensor Connector
(10) Fuel Feed Pump Connector

6D2±1
IGNITION SYSTEM (6VE1 3.5L)
AXIOM
ENGINE
IGNITION SYSTEM (6VE1 3.5L)
CONTENTS
Service Precaution 6D2±1. . . . . . . . . . . . . . . . . . . . . .
General Description 6D2±2. . . . . . . . . . . . . . . . . . . . .
Diagnosis 6D2±2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ignition Coil 6D2±3. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal 6D2±3. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection and Repair 6D2±3. . . . . . . . . . . . . . . . . .
Installation 6D2±3. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Spark Plug 6D2±5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . Removal 6D2±5. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection and Repair 6D2±5. . . . . . . . . . . . . . . . . .
Installation 6D2±5. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Crankshaft Position Sensor 6D2±6. . . . . . . . . . . . . . .
Removal 6D2±6. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 6D2±6. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Main Data and Specifications 6D2±7. . . . . . . . . . . . .
Service Precaution
WARNING: THIS VEHICLE HAS A SUPPLEMENTAL
RESTRAINT SYSTEM (SRS). REFER TO THE SRS
COMPONENT AND WIRING LOCATION VIEW IN
ORDER TO DETERMINE WHETHER YOU ARE
PERFORMING SERVICE ON OR NEAR THE SRS
COMPONENTS OR THE SRS WIRING. WHEN YOU
ARE PERFORMING SERVICE ON OR NEAR THE SRS
COMPONENTS OR THE SRS WIRING, REFER TO
THE SRS SERVICE INFORMATION. FAILURE TO
FOLLOW WARNINGS COULD RESULT IN POSSIBLE
AIR BAG DEPLOYMENT, PERSONAL INJURY, OR
OTHERWISE UNNEEDED SRS SYSTEM REPAIRS.CAUTION: Always use the correct fastener in the
proper location. When you replace a fastener, use
ONLY the exact part number for that application.
ISUZU will call out those fasteners that require a
replacement after removal. ISUZU will also call out
the fasteners that require thread lockers or thread
sealant. UNLESS OTHERWISE SPECIFIED, do not
use supplemental coatings (Paints, greases, or other
corrosion inhibitors) on threaded fasteners or
fastener joint interfaces. Generally, such coatings
adversely affect the fastener torque and the joint
clamping force, and may damage the fastener. When
you install fasteners, use the correct tightening
sequence and specifications. Following these
instructions can help you avoid damage to parts and
systems.

6D2±2
IGNITION SYSTEM (6VE1 3.5L)
General Description
Ignition is done by the electronic ignition (El) that directly
fires the spark plugs from ignition coils through spark plug
wires without using a distributor. The firing orders are
selected No.1, No.2, No.3, No.4, No.5, and No6.
Since the cylinder on exhaust stroke requires less energy
to fire its ignition plug, energy from the ignition coils can be
utilized to fire the mating cylinder on compression stroke.
After additional 360
rotation, respective cylinder strokes
are reversed.
The EI consists of six ignition coils,ignition control
module, crank position sensor, powertrain control module
(PCM) and other components.
The ignition coils are connected with the PCM by means
of a 80 pin connector.The ignition control module turns on/off the primary circuit
of ignition coils, and also it controls the ignition timing at
the engine speed below 538 rpm.
A notch in the timing disc on the crankshaft activates the
crank position sensor which then sends information such
as firing order and starting timing of each ignition coil to
the PCM.
Further, the El employs ignition control (IC) to control
similar to a distributor system.
By receiving signals such as crank position,engine
speed, water temperature and Manifold Absolute
Pressure (MAP), the PCM controls the ignition timing.
D06RY00037
Diagnosis
Refer to Section Drivability and Emissions for the
diagnosis to electronic ignition system (El system).