Symptom Table - Brake System (Hybrid Vehicles)

2007 Ford Fusion SEL, 2.3 Z, StandardSECTION Symptom Table - Brake System (Hybrid Vehicles)
WARNING: This page is about a different car, the 2011 Mercury Milan, 2011 Lincoln MKZ, and 2011 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.
SYMPTOM TABLE - BRAKE SYSTEM (HYBRID VEHICLES)

Condition Possible Sources Action
  • The red brake warning indicator and the yellow ABS warning indicator are illuminated
  • DTCs in the ABS module
  • The red brake warning indicator is always/never on
  • Brake fluid level switch
  • Parking brake switch
  • Wiring, terminals or connectors
  • Instrument Cluster (IC)
  • Smart Junction Box (SJB)
  • DTCs present in the ABS module
  • Vacuum sensor
  • Brakes drag
  • Parking brake component
  • Brake caliper and/or guide pins
  • Brake flexible hose
  • Brake booster
  • Brake master cylinder
  • CARRY OUT the Brake Master Cylinder - Compensator Port COMPONENT TESTSΒ  in this service information.
  • Pedal assembly
  • Hydraulic Control Unit (HCU)
  • Brakes lock up under light brake pedal force
  • Brake calipers and/or guide pins
  • Brake flexible hose
  • Brake pads
  • Brake discs
  • Pedal assembly
  • ABS
  • Vehicle pulls or drifts during braking
  • Brake calipers and/or guide pins
  • Brake flexible hose
  • Brake pads
  • Brake discs
  • Tires
  • Suspension component(s) and/or wheel alignment
  • Excessive brake pedal travel (low/spongy pedal)
  • Brake pedal assembly
  • Brake booster
  • Wiring terminals or connectors
  • ABS
  • Excessive brake pedal effort
  • Brake pedal assembly
  • Vacuum source
  • Brake booster manifold vacuum hose
  • Brake booster
  • Brake booster check valve
  • Brake pads
RENDER: 1.0x

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When to See a Mechanic

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

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