power steering ISUZU AXIOM 2002 Service Manual Online

6A±27
ENGINE MECHANICAL (6VE1 3.5L)
Timing Belt
Removal
1. Disconnect battery ground cable.
2. Remove air cleaner assembly.
3. Remove radiator upper fan shroud from radiator.
4. Move drive belt tensioner to loose side using wrench
then remove drive belt.
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
5. Remove cooling fan assembly four nuts, then the
cooling fan assembly.
6. Remove cooling fan drive pulley assembly.
7. Remove idle pulley assembly.
8. Remove serpentine belt tensioner assembly.
9. Remove power steering pump assembly.
10. Remove crankshaft pulley assembly using J-8614-01
crankshaft holder, hold crankshaft pulley remove
center bolt, then the pulley.11. Remove right side timing belt cover then left side
timing belt cover.
12. Remove lower timing belt cover
13. Remove pusher.
CAUTION: The pusher prevents air from entering
the oil chamber. Its rod must always be facing
upward.
014R100020
Legend
(1) Up Side
(2) Down Side
(3) Direction For Installation
(4) Locking Pin
(5) Apply a force of 980 N (220 lb) when
compressing the pusher rod.
14. Remove timing belt.
CAUTION:
1. Do not bend or twist the belt, otherwise its core
could be damaged. The belt should not be bent at
a radius less than 30 mm (1.1811 in).
2. Do not allow oil or other chemical substances to
come in contact with the belt. They will shorten
the life.
3. Do not attempt to pry or stretch the belt with a
screw driver or any other tool during installation.
4. Store timing belt in a cool and dark place. Never
expose the belt direct sunlight or heat.

6A±31
ENGINE MECHANICAL (6VE1 3.5L)
5. Install fan pulley bracket and tighten fixing bolts to the
specified torque.
Torque : 22 N´m (16 lb ft)
6. Install power steering pump assembly and tighten to
the specified torque.
Torque :
M8 bolt : 22 N´m (16 lb ft)
M10 bolt : 46 N´m (34 lb ft)
7. 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.
8. 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
9. Install radiator upper fan shroud.
10. Install air cleaner assembly.

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±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.

ENGINE COOLING (6VE1 3.5L)6B±11
Drive Belt and Cooling Fan
Drive Belt and Associated Parts
015RW005
Legend
(1) Crankshaft Pulley
(2) Generator
(3) Power Steering Pump(4) Water Pump and Cooling Fan Pulley
(5) Idle Pulley
(6) Tension Pulley
(7) Drive Belt
The drive belt adjustment is not required as automatic
drive belt tensioner is equipped.
Removal
Move the tension pulley drive belt loosen side, remove the
drive belt.
Inspection
Check drive belt for wear or damage, and replace with a
new one as necessary.
Installation
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.

6E±15
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
PCM Pinout Table, 80-Way Blue Connector ± Row ªF20 ~ 40º
060RY00156
PINPIN FunctionWire ColorIGN ONENG RUNRefer To
F21Bank 1 HO2S 1 GroundWHT0.0V0.0VÐ
F22Not UsedÐÐÐÐ
F23Bank 2 HO2S 1 GroundBLU0.0V0.0VGeneral Description
F24Not UsedÐÐÐÐ
F25ION Sensing ModuleRED/BLU1.555V1.555VGeneral Description and
Operation, ION Sensing
Module
F26ION Sensing ModuleRED/BLK1.555V1.555VGeneral Description and
Operation, ION Sensing
Module
F27Intake Air Temperature
(IAT) Sensor SignalGRN0.5±4.9V0.5±4.9VGeneral Description and
Operation, IAT
F28Not UsedÐÐÐÐ
F29Manifold Absolute
Pressure (MAP) Sensor
SignalRED3.5V±4.9V
(depends on
altitude and
barometric
pressure)0.6-1.3VGeneral Description and
Operation, Manifold Absolute
Pressure
F30Not UsedÐÐÐÐ
F31Not UsedÐÐÐÐ
F32Not UsedÐÐÐÐ
F33Not UsedÐÐÐÐ
F34Not UsedÐÐÐÐ
F35Not UsedÐÐÐÐ
F36Not UsedÐÐÐÐ
F37Power Steering Pressure
(PSP)GRN/YELB+B+Power Steering
F38Illuminated SwitchGRN/YELB+B+Chassis Electrical
F39Brake SwitchRED0.0V0.0V4L30E T/Mission
F40PCM GroundBLK/BLU0.0V0.0VChassis Electrical

6E±63
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
A/C Clutch Control Circuit Diagnosis
060R100063
Circuit Description
When air conditioning and blower fan are selected, and if
the system has a sufficient refrigerant charge, a 12-volt
signal is supplied to the A/C request input of the
powertrain control module (PCM). The A/C request
signal may be temporarily canceled during system
operation by the electronic thermostat in the evaporator
case. When the A/C request signal is received by the
PCM, the PCM supplies a ground from the compressor
clutch relay if the engine operating conditions are within
acceptable ranges. With the A/C compressor relay
energized, voltage is supplied to the compressor clutch
coil.
The PCM will enable the compressor clutch to engage
whenever A/C has been selected with the engine running,
unless any of the following conditions are present:

The throttle is greater than 90%.

The ignition voltage is below 10.5 volts.

The engine speed is greater than 4500 RPM for 5
seconds or 5400 RPM.
The engine coolant temperature (ECT) is greater
than 125
C (257
F).

The intake air temperature (IAT) is less than 5
C
(41
F).

The power steering pressure switch signals a high
pressure condition.
Diagnostic Aids
To diagnose an the intermittent fault, check for following
conditions:

Poor connection at the PCM±Inspect connections 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 OK, observe the
A/C clutch while moving connectors and wiring
harnesses related to the A/C. A sudden clutch
malfunction will indicate the source of the intermittent
fault.

6E±82
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Tech 2
ParameterRefer To Typical Data
Values
(2500 RPM) Typical Data
Values (IDLE) Units Displayed Data List
Long Term FT
Bank 2 (Long
Term Fuel
Trim)MisfireCounts and
Percentage100 to 150
counts, ±22%
to +17%100 to 150
counts, ±22%
to +17%Diagnosis, Fuel Trim
System Monitor; DTCs:
P0171
MAF (Mass Air
Flow)EngineGrams per
second2.85-6.659.5-16.5General Description and
Operation, MAF; DTCs:
P101, P0102, P0103
MAP kPa
(Manifold
Absolute
EngineKilopascals23-4019-32General Description and
Operation, Manifold
Absolute Pressure (MAP)Absolute
Pressure)Volts0.65-1.320.46-1.10Absolute Pressure (MAP)
Sensor; DTCs: P0106,
P0107, P0108
MILEngineOn/OffOffOffOn-Board Diagnostic
System Check
Misfire Cur. Cyl
#1MisfireCounts0-20-2DTC P0300
Misfire Cur. Cyl
#2MisfireCounts0-20-2DTC P0300
Misfire Cur. Cyl
#3MisfireCounts0-20-2DTC P0300
Misfire Cur. Cyl
#4MisfireCounts0-20-2DTC P0300
Misfire Cur. Cyl
#5MisfireCounts0-20-2DTC P0300
Misfire Cur. Cyl
#6MisfireCounts0-20-2DTC P0300
Misfire Hist.
Cyl #1MisfireCounts00DTC P0300
Misfire Hist.
Cyl #2MisfireCounts00DTC P0300
Misfire Hist.
Cyl #3MisfireCounts00DTC P0300
Misfire Hist.
Cyl #4MisfireCounts00DTC P0300
Misfire Hist.
Cyl #5MisfireCounts00DTC P0300
Misfire Hist.
Cyl #6MisfireCounts00DTC P0300
Misfire Failures
Since First FailMisfireCounts00DTC P0300
Misfire Passes
Since First FailMisfireCounts00DTC P0300
PNP
(Park/Neutral
Position)EngineP-N /
R-D-3-2-LP-NP-N4L30-E Automatic
Transmission Diagnosis
Power
EnrichmentEngineNO/YESNONOGeneral Description and
Operation, Acceleration
Mode
PSP Switch
(Power
Steering
Pressure)EngineNormal/HiNormal
PressureNormal
PressureRefer to 2A Section

6E±140
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Diagnostic Trouble Code (DTC) P0106 MAP System Performance
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 at wide-open throttle (low
vacuum) at sea level.
The MAP sensor is used to determine manifold pressure
changes while the linear exhaust gas recirculation (EGR)
flow test diagnostic is being run (refer to DTC P0401),
engine vacuum level for some other diagnostics, and
barometric pressure (BARO). The PCM compares the
MAP sensor signal to a calculated MAP based on throttle
position and various engine load factors. If the PCM
detects a MAP signal that varies excessively above or
below the calculated value, DTC P0106 will set.
Conditions for Setting the DTC

No TP sensor DTCs are present.

Engine speed is steady, changing less then 100 RPM.

Engine speed is between 1000 rpm and 4000 rpm.

Throttle position is steady, throttle angle changes less
than 1%.

EGR flow rate is steady, changing less than 4%.

No change in brake switch, A/C clutch, TCC or power
steering pressure switch status.

Above conditions are met for longer than 1 second.

Actual MAP value varies more than 10 kPa.
The MAP value must vary for a total of 10 seconds over
a 20-second period of time that the samples were
monitored.

The failure must occur for 2 consecutive trips.
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 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 P0106 will clear after 40 consecutive
warm-up cycles have occurred without a fault.

DTC P0106 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:

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.

6E±575
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Powertrain Control Module (PCM)
The powertrain control module (PCM) is located in the
passenger compartment below the center console. The
PCM controls the following:

Fuel metering system.

Transmission shifting (automatic transmission only).

Ignition timing.

On-board diagnostics for powertrain functions.
The PCM constantly observes the information from
various sensors. The PCM controls the systems that
affect vehicle performance. The PCM performs the
diagnostic function of the system. It can recognize
operational problems, alert the driver through the MIL
(Check Engine lamp), and store diagnostic trouble codes
(DTCs). DTCs identify the problem areas to aid the
technician in making repairs.
PCM Function
The PCM supplies either 5 or 12 volts to power various
sensors or switches. The power is supplied through
resistances in the PCM which are so high in value that a
test light will not light when connected to the circuit. In
some cases, even an ordinary shop voltmeter will not give
an accurate reading because its resistance is too low.
Therefore, a digital voltmeter with at least 10 megohms
input impedance is required to ensure accurate voltage
readings. Tool J 39200 meets this requirement. The PCM
controls output circuits such as the injectors, fan relays,
etc., by controlling the ground or the power feed circuit
through transistors or through either of the following two
devices:

Output Driver Module (ODM)

Quad Driver Module (QDM)
060RY00068
PCM Components
The PCM is designed to maintain exhaust emission levels
to government mandated standards while providing
excellent driveability and fuel efficiency. The PCM
monitors numerous engine and vehicle functions via
electronic sensors such as the throttle position (TP)sensor, heated oxygen sensor (HO2S), and vehicle
speed sensor (VSS). The PCM also controls certain
engine operations through the following:

Fuel injector control

Ignition control module

ION sensing module

Automatic transmission shift functions

Cruise control

Evaporative emission (EVAP) purge

A/C clutch control
PCM Voltage Description
The PCM supplies a buffered voltage to various switches
and sensors. It can do this because resistance in the
PCM is so high in value that a test light may not illuminate
when connected to the circuit. An ordinary shop
voltmeter may not give an accurate reading because the
voltmeter input impedance is too low. Use a 10-megohm
input impedance digital voltmeter (such as J 39200) to
assure accurate voltage readings.
The input/output devices in the PCM include
analog-to-digital converters, signal buffers, counters,
and special drivers. The PCM controls most components
with electronic switches which complete a ground circuit
when turned ªON.º These switches are arranged in
groups of 4 and 7, called either a surface-mounted quad
driver module (QDM), which can independently control up
to 4 output terminals, or QDMs which can independently
control up to 7 outputs. Not all outputs are always used.
PCM Input/Outputs
Inputs ± Operating Conditions Read

Air Conditioning ªONº or ªOFFº

Engine Coolant Temperature

Crankshaft Position

Exhaust Oxygen Content

Electronic Ignition

Manifold Absolute Pressure

Battery Voltage

Throttle Position

Vehicle Speed

Fuel Pump Voltage

Power Steering Pressure

Intake Air Temperature

Mass Air Flow

Engine Knock

Acceleration Position
Outputs ± Systems Controlled

EVAP Canister Purge

Exhaust Gas Recirculation (EGR)

Ignition Control

Fuel Control

ION Sensing Module

Electric Fuel Pump

Air Conditioning