2002 ISUZU AXIOM Service Repair Manual

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Page 617 of 2100

ISUZU AXIOM 2002 Service Repair Manual 4D2±34
TRANSFER CASE (TOD)
Torque Specifications (Contd)
E04R200002

Page 618 of 2100

ISUZU AXIOM 2002 Service Repair Manual 4D2±35 TRANSFER CASE (TOD)
Torque Specifications (Contd)
E04R200003

Page 619 of 2100

ISUZU AXIOM 2002 Service Repair Manual 4D2±36
TRANSFER CASE (TOD)
Special Tools
ILLUSTRATIONTOOL NO.
TOOL NAME
J±8614±11
Flange Holder
J±42804
Rear Oil Seal Installer
J±33951
Shift Shaft Oil Seal
Installer
J±42805
Bearing Remover
J±

Page 620 of 2100

ISUZU AXIOM 2002 Service Repair Manual 5A±1
BRAKE CONTROL SYSTEM
AXIOM
BRAKES
CONTENTS
Brake Control System 5A±1. . . . . . . . . . . . . . . . . . . .
Anti±lock Brake System 5B±1. . . . . . . . . . . . . . . . . .
Power±assisted Br

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. . . . . . . . . . . . . . .

Page 621 of 2100

ISUZU AXIOM 2002 Service Repair Manual 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 C

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.

Page 622 of 2100

ISUZU AXIOM 2002 Service Repair Manual 5A±3
BRAKE CONTROL SYSTEM
General Description
The Anti-lock Brake System (ABS) works on all four
wheels. A combination of wheel speed sensor and
Electronic Hydraulic Control Unit (EHCU) can determine

Page 623 of 2100

ISUZU AXIOM 2002 Service Repair Manual 5A±4BRAKE CONTROL SYSTEM
Functional Description
Hydraulic Unit (H/U)
Solenoid Valve
C05RW012
Legend
(1) Isolation Valve
(2) Dump valve

Page 624 of 2100

ISUZU AXIOM 2002 Service Repair Manual 5A±5
BRAKE CONTROL SYSTEM
Normal Braking
During normal (non anti-lock) braking, the solenoid valves
has current flow. The dump valve is closed and the
isolation valve is opened due to spring force.
B

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