sensor ISUZU AXIOM 2002 Service Repair Manual

5A±53
BRAKE CONTROL SYSTEM
Unit Inspection Procedure
This section describes the following inspection
procedures referred to during
Symptom Diagnosis and
Diagnosis By ªABSº Warning Light Illumination Pattern
without TECH 2with TECH 2
Sensor Output InspectionChart C-1-1 to C-1-3Chart TC-1
Chart C-1-1 FL Sensor Output Inspection Procedure
StepActionYe sNo
11. Turn the key off.
2. Disconnect coil integrated module connector.
3. Jack up the vehicle with all four wheels off the ground.
Measure the AC voltage between coil integrated module
connector terminals while turning FL wheel at a speed of 1
RPS:
Is the voltage between coil integrated module connector (C-6)
terminals 2 and 10 less than 200 mV?
Go to Step 2
OK.
Go to
Step 3
21. Disconnect the wheel speed sensor.
2. Measure resistance between the wheel speed sensor
connector terminals 1 and 2.
Is the check between connector (C-28) terminals 1 and 2 within
2.0k - 2.8k ohms?Connector is
faulty, or open or
short circuit of
harness between
wheel speed
sensor connector
and coil
integrated
module.
Inspect and
correct the
connector or
harness.
Go to
Step 3
Wheel speed
sensor is faulty.
Replace the
wheel speed
sensor.
Go to
Step 3
3Reconnect all components, ensure all components are properly
mounted.
Was this step finished?Repeat the ªBasic
diagnostic flow
chartº
Go to Step 3

5A±54BRAKE CONTROL SYSTEM
Chart C-1-2 FR Sensor Output Inspection Procedure
StepActionYe sNo
11. Turn the key off.
2. Disconnect coil integrated module connector.
3. Jack up the vehicle with all four wheels off the ground.
Measure the AC voltage between coil integrated module
connector terminals while turning FR wheel at a speed of 1
RPS:
Is the voltage between coil integrated module connector (C-6)
terminals 3 and 11 less than 200 mV?
Go to Step 2
OK.
Go to
Step 3
21. Disconnect the wheel speed sensor.
2. Measure resistance between the wheel speed sensor
connector terminals 1 and 2.
Is the check between connector (C-1) terminals 1 and 2 within
2.0k - 2.8k ohms?Connector is
faulty, or open or
short circuit of
harness between
wheel speed
sensor connector
and coil
integrated
module.
Inspect and
correct the
connector or
harness.
Go to
Step 3
Wheel speed
sensor is faulty.
Replace the
wheel speed
sensor.
Go to
Step 3
3Reconnect all components, ensure all components are properly
mounted.
Was this step finished?Repeat the ªBasic
diagnostic flow
chartº
Go to Step 3
Chart C-1-3 Rear Sensor Output Inspection Procedure
StepActionYe sNo
11. Turn the key off.
2. Disconnect coil integrated module connector.
3. Jack up the vehicle with all four wheels off the ground measure
the AC voltage between coil integrated module connector
terminals while turning Rear wheel at a speed of 1 RPS:
Is the check between coil integrated module connector (C-6)
terminals 4 and 12 than under 200 mV?
Go to Step 2
OK.
Go to
Step 3
21. Disconnect the wheel speed sensor.
2. Measure resistance between the wheel speed sensor
connector terminals 1 and 2.
Is the check between connector (F-4) terminals 1 and 2 within
1.0k - 1.7k ohms?Connector is
faulty, or open or
short circuit of
harness between
wheel speed
sensor connector
and coil
integrated
module.
Inspect and
correct the
connector or
harness.
Go to
Step 3
Wheel speed
sensor is faulty.
Replace the
wheel speed
sensor.
Go to
Step 3
3Reconnect all components, ensure all components are properly
mounted.
Was this step finished?Repeat the ªBasic
diagnostic flow
chartº
Go to Step 3

5A±55
BRAKE CONTROL SYSTEM
Chart TC-1 Sensor Output Inspection Procedure
StepActionYe sNo
11. Connect TECH 2.
2. Check the wheel speed of each sensor by Data List.
Is the vehicle speed normal?
Go to Step 6Go to Step 2
2Check the sensor harness for suspected disconnection (check
while shaking harness/connector).
Is the sensor harness connection normal?Replace speed
sensor.
Go to
Step 4
Repair.
Go to
Step 3
3Check the wheel speed of each sensor by Data List.
Is the vehicle speed normal?
Go to Step 6Go to Step 4
4Check the sensor rotor.
Is the sensor rotor normal?Replace speed
sensor.
Go to
Step 5
Replace sensor
rotor.
Go to
Step 5
5Check the harness between coil integrated module and speed
sensor.
Is the harness connection normal?
Go to Step 6
Repair harness or
connector
between coil
integrated
module and
speed sensor.
Go to
Step 6
6Reconnect all components, ensure all components are properly
mounted.
Was this step finished?Repeat the ªBasic
diagnostic flow
chartº
Go to Step 6

5B±1 ANTI±LOCK BRAKE SYSTEM
AXIOM
BRAKES
ANTI-LOCK BRAKE SYSTEM
CONTENTS
Service Precaution 5B±1. . . . . . . . . . . . . . . . . . . . . .
Electronic Hydraulic Control Unit 5B±2. . . . . . . . . .
Electronic Hydraulic Control Unit and
Associated Parts 5B±2. . . . . . . . . . . . . . . . . . . . . .
Removal 5B±2. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Disassembled View 5B±3. . . . . . . . . . . . . . . . . . . .
Disassembly 5B±3. . . . . . . . . . . . . . . . . . . . . . . . . .
Reassembly 5B±3. . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 5B±3. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Front Wheel Speed Sensor 5B±4. . . . . . . . . . . . . . . Front Wheel Speed Sensor and Associated
Parts 5B±4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal 5B±4. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection and Repair 5B±4. . . . . . . . . . . . . . . . . .
Installation 5B±4. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rear Wheel Speed Sensor 5B±5. . . . . . . . . . . . . . .
Removal 5B±5. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection and Repair 5B±5. . . . . . . . . . . . . . . . . .
Installation 5B±5. . . . . . . . . . . . . . . . . . . . . . . . . . . .
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.

5B±4ANTI±LOCK BRAKE SYSTEM
Front Wheel Speed Sensor
Front Wheel Speed Sensor and Associated Parts
350RS033
Legend
(1) Speed Sensor Connector
(2) Sensor Cable Fixing Bolt (Upper side)(3) Sensor Cable Fixing Bolt (Lower side)
(4) Sensor Cable Fixing Bolt (Sensor side)
(5) Speed Sensor
Removal
1. Remove speed sensor connector.
2. Remove sensor cable fixing bolt (Upper side).
3. Remove sensor cable fixing bolt (Lower side).
4. Remove the speed sensor cable fixing bolt.
5. Remove speed sensor.
Inspection and Repair
1. Check the speed sensor pole piece for presence of
foreign materials; remove any dirt, etc.
2. Check the pole piece for damage; replace speed
sensor if necessary.
3. Check the speed sensor cable for short or open
circuit, and replace with a new one if necessary.
To check for cable short or open, bend or stretch the
cable while checking for continuity.
4. Check the sensor ring for damage including tooth
chipping, and if damaged, replace the sensor ring
assembly. Refer to removal of the sensor ring in
Section
4C ªFront hub and discº.
Installation
1. Install speed sensor and take care not to hit the speed
sensor pole piece during installation.
2. Install speed sensor fixing bolt and tighten the fixing
bolt to the specified torque.
Torque: 11 N´m (95 lb in)
3. Install speed sensor cable fixing bolt (Lower side) and
tighten the fixing bolt to the specified torque.
Torque : 24 N´m (17 lb ft)
4. Install speed sensor cable fixing bolt (Upper side) and
tighten the fixing bolt to the specified torque.
Torque : 6 N´m (52 lb in)
NOTE: Confirm that a white line marked on the cable is
not twisted when connecting the speed sensor cable.
5. Install speed sensor connector.

5B±5 ANTI±LOCK BRAKE SYSTEM
Rear Wheel Speed Sensor
Removal
1. Disconnect harness connector (1).
2. Remove sensor fixing bolt (2) .
3. Remove speed sensor (3).
350R100004
Inspection and Repair
1. Check speed sensor pole piece for presence of
foreign materials; remove any dirt, etc.
2. Check the pole piece for damage, and replace speed
sensor if necessary.
3. Check speed sensor cable for short or open, and
replace with a new one if necessary. To check for
cable short or open, bend or stretch the cable while
checking for continuity.
4. Check the sensor ring for damage including tooth
chipping, and if damaged, replace the axle shaft
assembly. Refer to removal of the sensor ring in
Section
4A2 ªDifferential (Rear)º.
Installation
1. Install speed sensor (3).
2. Tighten the sensor fixing bolt (2) to the specified
torque.
Torque : 24 N´m (17 lb ft)
3. Connect harness connector (1).
350R100004

5C±21 POWER±ASSISTED BRAKE SYSTEM
Fluid Reservoir Tank
Fluid Reservoir Tank and Associated Parts
330RW003
Legend
(1) Fluid Reservoir
(2) Electrical Connector(3) O±ring
(4) Retainer
Removal
NOTE: Before removing the fluid reservoir, remove the
brake fluid from the fluid reservoir.
1. Disconnect electrical connector.
2. Remove retainer (1).
330RW004
3. Remove fluid reservoir and the fluid level sensor built
into the fluid reservoir. The fluid level sensor cannot
be removed for servicing.
4. Remove O±ring.
Installation
To install, follow the removal steps in the reverse order,
noting the following points:
1. O±ring (1) must be set onto the fluid reservoir (2),
before installing fluid reservoir.
330RW005

6A±6
ENGINE MECHANICAL (6VE1 3.5L)
Rough Engine Idling or Engine Stalling
ConditionPossible causeCorrection
Trouble in fuel injection systemThrottle shutting off incompleteCorrect or replace
Throttle position sensor circuit open
or shortedCorrect or replace
Fuel injector circuits open or shortedCorrect or replace
Fuel injectors damagedReplace
Fuel pump relay defectiveReplace
Mass Airflow Sensor circuit open or
poor connectionsCorrect or replace
Mass Airflow Sensor defectiveReplace
Manifold Absolute Pressure Sensor
circuit open or poor connectionsCorrect or replace
Manifold Absolute Pressure Sensor
defectiveReplace
Engine Coolant Temperature Sensor
circuit open or poor connectionsCorrect or replace
Engine Coolant Temperature Sensor
defectiveReplace
Intake Air Temperature sensor circuit
open or poor connectionsCorrect or replace
Intake Air Temperature sensor
defectiveReplace
Ion Sensing Module cable broken or
poor connectionsCorrect or replace
Ion Sensing Module defectiveReplace
Vehicle Speed Sensor circuit open or
shortedCorrect or replace
Vehicle Speed Sensor defectiveReplace
Trouble in emission control systemPowertrain Control Module defectiveReplace
Exhaust Gas Recirculation Valve
circuit open or poor connectionsCorrect or replace
Exhaust Gas Recirculation Valve
faultyReplace
Canister purge valve circuit open or
poor connectionsCorrect or replace
Canister purge valve defectiveReplace
Evaporative Emission Canister
Purge control valve defectiveReplace
Trouble in ignition systemRefer to ªHard Startº
OthersEngine lacks compressionRefer to ªHard Startº
Valve incorrectly seatedLap valve
Air Cleaner Filter cloggedReplace filter element
Valve timing incorrectReadjust
Idle air control valve brokenReplace
Fast idle solenoid defectiveReplace
Positive Crankcase Ventilation valve
defective or cloggedReplace

6A±7
ENGINE MECHANICAL (6VE1 3.5L)
Rough Engine Running
ConditionPossible causeCorrection
Engine misfires periodicallyIgnition coil layer shortedReplace
Spark plugs foulingClean or install hotter type plug
Spark plug(s) insulator nose leakingReplace
Fuel injector(s) defectiveReplace
Powertrain control module faultyReplace
Engine knocks periodicallySpark plugs running too hotInstall colder type spark plugs
Powertrain control module faultyReplace
Ion Sensing module faultyRefer or replace
Engine lacks powerSpark plugs fouledClean
Fuel injectors defectiveReplace
Mass Airflow Sensor or Intake
Airflow Sensor circuit defectiveCorrect or replace
Manifold Absolute Pressure (MAP)
Sensor or Manifold Absolute
Pressure Sensor circuit defectiveCorrect or replace
Engine Coolant Temperature Sensor
or Engine Coolant Temperature
Sensor circuit defectiveCorrect or replace
Powertrain Control Module faultyReplace
Intake Air Temperature Sensor or
Intake Air Temperature Sensor
circuit defectiveCorrect or replace
Throttle Position Sensor or Throttle
Position Sensor circuit defectiveCorrect or replace
ION Sensing Module or ION Sensing
Module circuits defectiveCorrect or replace

6A±8
ENGINE MECHANICAL (6VE1 3.5L)
Hesitation
ConditionPossible causeCorrection
Hesitation on accelerationThrottle Position Sensor adjustment
incorrectReplace throttle valve assembly
Throttle Position Sensor circuit open
or shortedCorrect or replace
Mass Airflow Sensor circuit open or
poor connectionsCorrect or replace
Mass Airflow Sensor defectiveReplace
Manifold Absolute Pressure (MAP)
Sensor circuit open or shortedCorrect or replace
MAP Sensor defectiveReplace
Intake Air Temperature (IAT) Sensor
circuit open or poor connectionsCorrect or replace
Ion Sensing Module circuit open or
poor connectionsCorrect or replace
Ion Sensing Module defectiveReplace
IAT Sensor defectiveReplace
Hesitation at high speedsFuel tank strainer cloggedClean or replace
(Fuel pressure too low)Fuel pipe cloggedClean or replace
Fuel filter cloggedReplace
Defective fuel pump systemCheck and replace
Fuel Pressure Control Valve leakingReplace
Hesitation at high speeds
(Fuel injector not working normally)Power supply or ground circuit for
Multiport Fuel Injection System
shorted or openCheck and correct or replace
Fuel Injector defectiveReplace
Cable of Multiport Fuel Injection
System circuit open or poor
connectionsCorrect or replace