2005 Ford Econoline E150, Van Cargo, 5.4 LFACTORY OEM SERVICE PROCEDURE

Symptom Chart

ANTI-LOCK CONTROL SYMPTOM CHART

Condition Possible Sources Action
  • No communication with the anti-lock brake system (ABS) module
  • Circuitry.
  • ABS module.
  • Soft/excessive brake pedal travel
  • Inlet (isolation) valve or hydraulic outlet (dump) valve.
  • Leaky inlet (isolation) valve during ABS applications (soft).
  • Brake line or hose, fitting, master cylinder, wheel cylinder or caliper.
  • Air in brake system.
  • Brake shoe or pad linings.
  • Parking brake.
  • Rear axle seal.
  • ABS false activation, ABS too sensitive, ABS activates on normal stop
  • Front anti-lock brake sensor indicators.
  • INSPECT both front wheel speed sensor rings for damaged teeth. CHECK the wheel speed sensor gap.
  • Chafed wire insulation or pinched wire.
  • INSPECT the wiring harness from the front wheel speed sensor knuckle to the frame and from the rear axle to the frame.
  • Open or shorted wheel speed sensor circuit.
  • Rear wheel speed sensor indicator.
  • INSPECT the rear ABS indicator.
  • Wheel speed sensor
  • Rear brake adjustment.
  • Linings.
  • Wheels lock up
  • Hydraulic outlet (dump) valve.
  • Leaky inlet (isolation) valve during ABS (soft).
  • Front or rear brakes.
  • Parking brake.
  • Rear axle seal.
  • Vehicle pulls during braking
  • Sensor failure.
  • Base brake system.
  • Anti-lock brake system (ABS) warning indicator illuminated
  • Circuitry.
  • ABS module.
  • The red BRAKE warning indicator stays on when the ignition switch is in RUN
  • Circuitry.
  • Brake fluid level.
  • Instrument cluster.
  • Anti-lock brake system (ABS) module.
  • The yellow anti-lock brake system (ABS) warning indicator does not self-check
  • Circuitry.
  • Instrument cluster.
  • ABS module.
  • The red BRAKE warning indicator and yellow anti-lock brake system (ABS) warning indicator are illuminated
  • Dynamic rear proportioning (DRP).
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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