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HOMESERVICE MANUALSMITSUBISHI2007OUTLANDER LS, FWDREPAIR AND DIAGNOSISBRAKESMECHANICAL - HYDRAULICBASIC BRAKE SYSTEMON-VEHICLE SERVICEBRAKE BOOSTER OPERATION CHECKINSPECTION WITHOUT USING TESTER
2007 Mitsubishi Outlander LS, FWD

Inspection Without Using Tester

2007 Mitsubishi Outlander LS, FWDSECTION Inspection Without Using Tester
  1. Carry out the simplified brake booster operation check in the following procedure:
    1. Run the engine for 1 to 2 minutes, and then stop. Depress the brake pedal with normal depression force. The result is judged as "Good" when the pedal stroke is great at the first depression, and becomes smaller as you repeat depressing the pedal. If the pedal stroke does not change, the result is judged as "No Good."
    2. With the engine stopped, depress the brake pedal several times. Keep the brake pedal depressed and start the engine. At this time, when the pedal moves down slightly, the result is judged as "Good." The result is judged as "No Good" if the pedal does not moves down.
      Fig 1: Identifying Brake Pedal Travelling Position (Good And No Good)
      G04871849Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
    3. With the engine running, depress the brake pedal. Stop the engine in this condition. The result is judged as "Good" when the pedal height does not change for approximately 30 seconds. The result is judged as "No Good" if the pedal moves up.
  2. The brake booster is judged as normal when the results of all the above checks are "Good."

    When one or more of the above check results are "No Good," then the check valve, vacuum hose, or brake booster is suspected faulty.

    Fig 2: Identifying Brake Pedal Travelling Position (When Engine Is Stopped And Start)
    G04871850Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
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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.