2004 ISUZU TF SERIES Workshop Manual

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Page 321 of 4264

ISUZU TF SERIES 2004 Workshop Manual BRAKE CONTROL SYSTEM 5A-5 General Description EHCU has controlled ABS (Anti-lock Brake System) and EBD (Electronic Brake-force Distribution System). ABS works on all four wheels. EBD system wor

Page 322 of 4264

ISUZU TF SERIES 2004 Workshop Manual 5A-6 BRAKE CONTROL SYSTEM EHCU, Brake Pipe Diagram This illustration is based on RHD model C05L300011 Legend (1) Front Right Brake Port (out) (4) Front Brake Port (in)

Page 323 of 4264

ISUZU TF SERIES 2004 Workshop Manual BRAKE CONTROL SYSTEM 5A-7 Hydraulic Unit (H/U) C05L300004 Legend (1) Brake Pedal (5) Dump Valve (2) Master Cylinder (6) Buffer Chamber (3) Motor and Pump (7)Brake (4) Isolation V

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ISUZU TF SERIES 2004 Workshop Manual 5A-8 BRAKE CONTROL SYSTEM Normal Braking During normal (non anti-lock) braking, the solenoid valve has current flow. The dump valve is closed and the isolation valve is opened due to spring for

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ISUZU TF SERIES 2004 Workshop Manual BRAKE CONTROL SYSTEM 5A-9 Pressure Isolation (Pressure Maintain) The electronic-hydraulic control unit is activated when the brakes are applied. If the information from the wheel speed sensors

Page 326 of 4264

ISUZU TF SERIES 2004 Workshop Manual 5A-10 BRAKE CONTROL SYSTEM Pressure Reduction Once the brake pressure is isolated, it must be reduced to allow the wheels to unlock. This is accomplished by dumping a portion of the brake fluid

Page 327 of 4264

ISUZU TF SERIES 2004 Workshop Manual BRAKE CONTROL SYSTEM 5A-11 Brake Release At the end of the anti-lock stop, when the brake pedal is released, the pump will remain running for a short time to help drain any fluid from the buffe

Page 328 of 4264

ISUZU TF SERIES 2004 Workshop Manual 5A-12 BRAKE CONTROL SYSTEM Circuit Diagram RTW45AXF000101
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