Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSFORD2007ESCAPE BASE, 2.3 Z, FWD, AUTOMATICREPAIR AND DIAGNOSISBRAKESTRACTION CONTROLBRAKE SYSTEM - GENERAL INFORMATIONDIAGNOSTIC TESTSBRAKE SYSTEMCOMPONENT TESTSBRAKE BOOSTER - OPERATION CHECK
2007 Ford Escape Base, 2.3 Z, FWD, Automatic
Brake Booster - Operation Check
2007 Ford Escape Base, 2.3 Z, FWD, AutomaticSECTION Brake Booster - Operation Check
- Inspect all vacuum hoses and connections. All unused vacuum connections must be capped. Hoses and their connections must be correctly secured and in good condition with no holes, cracks, or collapsed areas.
- Check the brake hydraulic system for leaks or insufficient brake fluid. Repair as necessary.
- With the engine off, place the transaxle in PARK (A/T) or NEUTRAL (M/T) and apply the parking brake.
- Apply and hold the brake pedal several times to exhaust all of the vacuum reserve from the system.
- Apply and hold the brake pedal.
- Start the engine. If the vacuum system is operating, the brake pedal will move downward slightly under constant foot pressure. If no movement occurs, the power brake booster system is not functioning. Turn the engine off.
- Remove the vacuum hose from the power brake booster.
- Place the transaxle in PARK (A/T) or NEUTRAL (M/T) and apply the parking brake. Start the engine. Manifold vacuum should be available from the vacuum booster hose. If manifold vacuum is not available, inspect all of the hoses and hose connections. Repair as necessary.
- Connect the vacuum booster hose and run the engine at fast idle for 10 seconds.
- Turn off the engine and let the vehicle stand for 10 minutes.
- Apply the brake pedal with approximately 89 Newtons (20 lbs) of force. The brake pedal feel should be the same as normal power-assisted brake operation for at least one brake pedal application. If the brake pedal feel is normal, the power brake booster is OK. If the brake pedal feels hard, continue with the test.
- Remove the vacuum booster hose from the power brake booster. Apply 57.3 kPa (17 in-Hg) of vacuum to the vacuum booster hose. If the vacuum does not leak off after 10 minutes, install a new power brake booster. If the vacuum does leak off, install a new check valve and/or new vacuum booster hoses.
NOTE:
If the power brake booster is noisy when the brakes are applied, a new component must be installed.
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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.