2002 ISUZU AXIOM brake sensor

4C±4
DRIVE SHAFT SYSTEM
7. Remove hub and disc assembly.
8. Remove ABS sensor ring.
9. Remove outer bearing.
10. Remove oil seal.
11. Remove inner bearing.
12. Use a brass bar to remove the outer bearing outer
race(1), oil seal, inner bearing and inner bearing outer
race(2) from the hub.
411RS002
13. Remove bolt.
14. If necessary, replace the wheel pin in the following
manner.

Scribe mark(1) on hub to disc before disassembly
to insure proper assembly.
411RS003

Clamp hub and disc assembly in vise, using
protective pads. Remove six(6) disc-to-hub
retaining bolts.
411RS021

Place hub on a suitable work surface and remove
wheel studs, as required, using a hammer.
411RS004
Inspection and Repair
Make necessary correction or parts replacement if wear,
damage, corrosion or any other abnormal condition are
found through inspection.
Check the following parts.

Hub

Hub bearing oil seal

Knuckle spindle

Disc

Caliper

ABS sensor ring
For inspection and servicing of disc caliper and related
parts, refer to
Disc Brake in Brake section.

4C±8
DRIVE SHAFT SYSTEM
Front Hub and Disc (4WD Model)
Disassembled View
411RW001
Legend
(1) Bolt
(2) Cap
(3) Snap Ring and Shim
(4) Hub Flange
(5) Lock Washer and Lock Screw
(6) Hub Nut(7) Outer Bearing
(8) Bolt
(9) Hub and Disc Assembly
(10) Wheel Pin
(11) ABS Sensor Ring
(12) Inner Bearing
(13) Oil Seal
Disassembly
1. Before disassembly, select the 2WD position with the
4WD switch.
2. Jack up the front of vehicle and support frame with
jack attached.3. Remove the two bolts from the rear side of the
knuckle arm, then remove the brake caliper, with the
brake hose attached.
Use a wire to attach the brake caliper to the upper link.
Refer to
Disk Brakes in Brake section.
4. Remove Bolt.
5. Remove cap.

4C±10
DRIVE SHAFT SYSTEM
Inspection and Repair
Make necessary correction or parts replacement if wear,
damage, corrosion or any other abnormal condition are
found through inspection.
Check the following parts.

Hub

Hub bearing, oil seal

Knuckle spindle

Disc

Caliper

Shift on the fly system parts (Cap, Hub flange, Shim,
Snap ring)

ABS sensor ring
For inspection and servicing of disc caliper and related
parts, refer to
Disc Brakes in Brake section.
Reassembly
1. Install wheel pin.

Place the hub on a wood workbench or a block of
wood approx. 6º by 6º to protect the wheel stud
ends and threads.

Insert a wheel stud using a hammer.
NOTE: Be sure the wheel stud is started squarely and
seats completely.
411RS005
2. Align scribe marks(1) and attach the hub to the disc,
then tighten the bolts to the specified torque.
Torque: 103 N´m (76 lb ft)
411RS003
3. Install inner bearing.
Install the outer race by driving it into the hub by using
insatller J±36829 and grip J±8092.
901RW055

4C±48
DRIVE SHAFT SYSTEM
Reassembly
1. Install wheel pin.
411RS005

Place hub on a wood workbench or a block of wood
approx. 6º by 6º to protect the wheel stud ends and
threads.

Install wheel stud, using a hammer.
NOTE: Be sure wheel stud is started squarely and seats
completely.
2. Install the hub unit bearing to the knuckle.
Tighten the bolts to the specified torque.
Hub unit bearing bolt
Torque: 103+10 N´m (10.5 + 1 kg´m)
If there is rust on the bearing and knuckle contact
surfaces, use sandpaper to remove it before installation.
3. Install the ABS sensor connector.
4. Install the disc rotor.
5. Install the brake caliper to the bracket.
Refer to
Front disc caliper assembly in Section 5C of this
Manual.

4C±49 DRIVE SHAFT SYSTEM
Front Hub and Disc (4WD Model)
Disassembled View
411R200010
Legend
(1) Disc Rotor
(2) Hub Unit, Bearing(3) Wheel Pin
(4) ABS Sensor Ring
(5) Bolt
Disassembly
1. Move the transfer case lever to the 2WD position.
2. Raise the vehicle with a jack. Support the frame with
chassis stands.
3. Remove the brake caliper from the bracket. Secure
the caliper with a wire that it does not interfare with the
work process.Refer to
Front disc caliper assembly in Section 5C of this
Manual.
4. Remove the disk rotor.
Apply penetrating oil to the bearing and disc rotor contact
surfaces if the surfaces are stuck together because of
rust.
5. Inspect the hub unit bearing. Refer to
inspection
below.

4C±51 DRIVE SHAFT SYSTEM
Reassembly
1. Install the wheel pin.

Place hub on a wood workbench or a block of wood
approx. 6º by 6º to protect the wheel stud ends and
threads.

Install the wheel stud, using a hammer.
NOTE: Be sure wheel stud is started squarely and seats
completely.
411RS005
2. Install the ABS rotor sensor to the hub unit bearing.
Tighten the bolts to the specified torque.
ABS rotor sensor bolt
Torque: 18.7+5 N´m (1.9+0.5 kg´m)
3. Install the hub unit bearing to the knuckle. Tighten the
bolts to the specified torque.
Hub unit bearing bolt
Torque: 103+10 N´m (10.5+1 kg´m)
If there is rust on the bearing and knuckle contact
surfaces, use sandpaper to remove it before installation.
Take care not to push the front drive shaft and oil seal out
of position.
4. Hand tighten the front drive shaft nuts.
Use new nuts.
5. Install the disc rotor.
6. Install the brake caliper to the bracket.
Refer to
Front disc caliper assembly in Section 5C of this
Manual.7. Tighten the front drive shaft nuts to the specified
torque.
Front drive shaft nut
Torque: 245+19.6 N´m (25+2 kg´m)
411R200005
8. Caulk the front drive shaft nuts.
The caulking must be free of cracks.
411R200006

5A±1
BRAKE CONTROL SYSTEM
AXIOM
BRAKES
CONTENTS
Brake Control System 5A±1. . . . . . . . . . . . . . . . . . . .
Anti±lock Brake System 5B±1. . . . . . . . . . . . . . . . . .
Power±assisted Brake System 5C±1. . . . . . . . . . . .
Parking Brakes (4x4 Model) 5D1±1. . . . . . . . . . . . . .
Parking Brakes (4x2 Model) 5D2±1. . . . . . . . . . . . . .
Brake Control System
CONTENTS
Service Precaution 5A±2. . . . . . . . . . . . . . . . . . . . . .
General Description 5A±3. . . . . . . . . . . . . . . . . . . . .
Functional Description 5A±4. . . . . . . . . . . . . . . . .
System Components 5A±10. . . . . . . . . . . . . . . . . . .
Electronic Hydraulic Control Unit (EHCU) 5A±10.
ABS Warning Light 5A±10. . . . . . . . . . . . . . . . . . . .
Wheel Speed Sensor 5A±10. . . . . . . . . . . . . . . . . .
G-Sensor 5A±10. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Normal and Anti-lock Braking 5A±10. . . . . . . . . . .
Brake Pedal Travel 5A±10. . . . . . . . . . . . . . . . . . . .
Acronyms and Abbreviations 5A±11. . . . . . . . . . . .
General Diagnosis 5A±11. . . . . . . . . . . . . . . . . . . . . . .
General Information 5A±11. . . . . . . . . . . . . . . . . . . .
ABS Service Precautions 5A±11. . . . . . . . . . . . . . .
Computer System Service Precautions 5A±11. . .
General Service Precautions 5A±11. . . . . . . . . . . .
Note on Intermittents 5A±11. . . . . . . . . . . . . . . . . . .
Test Driving ABS Complaint Vehicles 5A±12. . . . .
ªABSº Warning Light 5A±12. . . . . . . . . . . . . . . . . . .
Normal Operation 5A±12. . . . . . . . . . . . . . . . . . . . .
Tech 2 Scan Tool 5A±13. . . . . . . . . . . . . . . . . . . . . .
DATA LIST 5A±16. . . . . . . . . . . . . . . . . . . . . . . . . . .
ACTUATOR TEST 5A±17. . . . . . . . . . . . . . . . . . . . .
Tech 2 Service Bleed 5A±21. . . . . . . . . . . . . . . . . .
Basic Diagnostic Flow Chart 5A±22. . . . . . . . . . . .
Basic Inspection Procedure 5A±23. . . . . . . . . . . . .
EHCU Connector Pin-out Checks 5A±24. . . . . . . . .
Circuit Diagram 5A±25. . . . . . . . . . . . . . . . . . . . . . .
Connector List 5A±28. . . . . . . . . . . . . . . . . . . . . . . .
Part Location 5A±29. . . . . . . . . . . . . . . . . . . . . . . . .
Symptom Diagnosis 5A±30. . . . . . . . . . . . . . . . . . . . .
Chart A-1 ABS Works Frequently But
Vehicle Does Not Decelerate 5A±30. . . . . . . . . . .
Chart TA-1 ABS Works Frequently But
Vehicle Does Not Decelerate
(Use TECH 2) 5A±31. . . . . . . . . . . . . . . . . . . . . . . .
Chart A-2 Uneven Braking Occurs While
ABS Works 5A±31. . . . . . . . . . . . . . . . . . . . . . . . . . .
Chart TA-2 Uneven Braking Occurs While
ABS Works (Use TECH 2) 5A±31. . . . . . . . . . . . . Chart A-3, TA-3 The Wheels Are Locked 5A±32.
Chart A-4 Brake Pedal Feed Is Abnormal 5A±32.
Chart A-5, TA-5 Braking Sound
(From EHCU) Is Heard While Not Braking 5A±33
Diagnostic Trouble Codes 5A±34. . . . . . . . . . . . . . . .
Diagnosis By ªABSº Warning Light
Illumination Pattern 5A±36. . . . . . . . . . . . . . . . . . . . .
Diagnostic Trouble Codes (DTCs) 5A±37. . . . . . .
Chart B-1 With the key in the ON position
(Before starting the engine). Warning light
(W/L) is not activated. 5A±39. . . . . . . . . . . . . . . . .
Chart B-2 CPU Error (DTC 14 (Flash out) /
C0271, C0272, C0273, C0284 (Serial
communications)) 5A±39. . . . . . . . . . . . . . . . . . . . .
Chart B-3 Low or High Ignition Voltage
(DTC 15 (Flash out) / C0277, 0278 (Serial
communications)) 5A±40. . . . . . . . . . . . . . . . . . . . .
Chart B-4 Excessive Dump Time (DTC 17
(Flash out) / C0269 (Serial
communications)) 5A±40. . . . . . . . . . . . . . . . . . . . .
Chart B-5 Excessive Isolation Time
(DTC 18 (Flash out) / C0274
(Serial communications)) 5A±40. . . . . . . . . . . . . . .
Chart B-6 G-Sensor Output Failure
(DTC 21 (Flash out) / C0276
(Serial communications)) 5A±41. . . . . . . . . . . . . . .
Chart B-7 Brake Switch Failure
(DTC 22 (Flash out) / C0281
(Serial communications)) 5A±41. . . . . . . . . . . . . . .
Chart B-8 2WD Controller in 4WD Vehicle
Controller (DTC 13 (Flash out) / C0285
(Serial communications)), 4WD State Input
Signal Failure (DTC 24 (Flash out) / C0282
(Serial communications)) 5A±42. . . . . . . . . . . . . . .
Chart B-9 Pump Motor Failure
(DTC 32 (Flash out) / C0267, C0268
(Serial communications)) 5A±42. . . . . . . . . . . . . . .
Chart B-10 EHCU Valve Relay Failure
(DTC 35 (Flash out) / C0265, C0266
(Serial communications)) 5A±43. . . . . . . . . . . . . . .
Chart B-11 FL Isolation Solenoid Coil Failure
(DTC 41 (Flash out) / C0245, C0247
(Serial communications)) 5A±43. . . . . . . . . . . . . . .
Chart B-12 FL Dump Solenoid Coil Failure
(DTC 42 (Flash out) / C0246, C0248
(Serial communications)) 5A±43. . . . . . . . . . . . . . .

5A±2BRAKE CONTROL SYSTEM
Chart B-13 FR Isolation Solenoid Coil Failure
(DTC 43 (Flash out) / C0241, C0243
(Serial communications)) 5A±44. . . . . . . . . . . . . . .
Chart B-14 FR Dump Solenoid Coil Failure
(DTC 44(Flash out) / C0242, C0244
(Serial communications)) 5A±44. . . . . . . . . . . . . . .
Chart B-15 Rear Isolation Solenoid Coil
Failure (DTC 45 (Flash out) / C0251, C0253
(Serial communications)) 5A±44. . . . . . . . . . . . . . .
Chart B-16 Rear Dump Solenoid Coil Failure
(DTC 46 (Flash out) / C0252, C0254
(Serial communications)) 5A±45. . . . . . . . . . . . . . .
Chart B-17 FL Speed Sensor Open or Shorted
(DTC 51 (Flash out) / C0225
(Serial communications)) 5A±45. . . . . . . . . . . . . . .
Chart B-18 FR Speed Sensor Open or Shorted
(DTC 52 (Flash out) / C0221
(Serial communications)) 5A±46. . . . . . . . . . . . . . .
Chart B-19 Rear Speed Sensor Open or
Shorted (DTC 53 (Flash out) / C0235
(Serial communications)) 5A±47. . . . . . . . . . . . . . .
Chart B-20 FL Speed Sensor Missing Signal
(DTC 61 (Flash out) / C0226, C0227
(Serial communications)) 5A±48. . . . . . . . . . . . . . . Chart B-21 FR Speed Sensor Missing Signal
(DTC 62 (Flash out) / C0222, C0223
(Serial communications)) 5A±49. . . . . . . . . . . . . . .
Chart B-22 Rear Speed Sensor Missing Signal
(DTC 63 (Flash out) / C0236, C0237
(Serial communications)) 5A±50. . . . . . . . . . . . . . .
Chart B-23 Simultaneous Drop-out of Front
Speed Sensor Signal (DTC 64 (Flash out) /
C0229 (Serial communications)) 5A±51. . . . . . . .
Chart B-24 Wheel Speed Input Abnormality
(DTC 65 (Flash out) / C0238 (Serial
communications)) 5A±52. . . . . . . . . . . . . . . . . . . . .
Unit Inspection Procedure 5A±53. . . . . . . . . . . . . . . .
Chart C-1-1 FL Sensor Output Inspection
Procedure 5A±53. . . . . . . . . . . . . . . . . . . . . . . . . . .
Chart C-1-2 FR Sensor Output Inspection
Procedure 5A±54. . . . . . . . . . . . . . . . . . . . . . . . . . .
Chart C-1-3 Rear Sensor Output Inspection
Procedure 5A±54. . . . . . . . . . . . . . . . . . . . . . . . . . .
Chart TC-1 Sensor Output Inspection
Procedure 5A±55. . . . . . . . . . . . . . . . . . . . . . . . . . .
Special Tools 5A±56. . . . . . . . . . . . . . . . . . . . . . . . . . .
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.