HOME ANTI-LOCK BRAKE SYSTEM (ABS) 5A4-1 SECTION 5A4 ANTI-LOCK BRAKE SYSTEM (ABS) Service Precaution 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.
CONTENTS PAGE Service Precaution ..........................................................................................................5A4 -1 General Description ........................................................................................................5A4 -5 System Components ..................................................................................................5A4 -6 Electronic Hydraulic Control Unit (EHCU) ................................................................5A4 -6 Hydraulic Unit (HU).....................................................................................................5A4 -6 ABS Warning Light .....................................................................................................5A4 -6 Wheel Speed Sensor ..................................................................................................5A4 -6 Normal and Anti-lock Braking....................................................................................5A4 -6 Brake Pedal Travel......................................................................................................5A4 -7 Acronyms and Abbreviations ....................................................................................5A4 -7 General Diagnosis...........................................................................................................5A4 -7 General Information....................................................................................................5A4 -7 ABS Service Precautions...........................................................................................5A4 -7 Computer System Service Precautions....................................................................5A4 -7 General Service Precautions .....................................................................................5A4 -8 Note on Intermittents..................................................................................................5A4 -8 Test Driving ABS Complaint Vehicles.......................................................................5A4 -8 “ABS” Warning Light..................................................................................................5A4 -8 Normal Operation .......................................................................................................5A4 -8 Basic Diagnostic Flow Chart .....................................................................................5A4 -9 Basic Inspection Procedure.......................................................................................5A4 -9