Question about 2007 Lexus SC 430

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BRAKE light comes on occasionally - parking brake not engaged.

The red BRAKE warning light flashes on when I depress the brake pedal - randomly, usually only at very slow speeds. The parking brake is not engaged.

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Check your brake fluid it is more then likely low.You might need brakes as when they wear they take up brake fluid as the piston extends to make up for the worn pad material.

Posted on Nov 29, 2008


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My break lights turn on by them self why?

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Sep 24, 2010 | 2007 Pontiac G6 GT Convertible

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I have a 2001 Ford F-350 V-10 cruise control stopped working

Speed Control The speed control system consists of the following components:
  • anti-lock brake control module
  • brake pedal position (BPP) switch
  • clutch pedal position (CPP) switch or jumper
  • deactivator switch
  • speed control actuator switches
  • speed control servo
  • speed control actuator cable
  • speed control indicator
  • brush assembly (Motorhome vehicles only)
  • control and spring brush assembly (Motorhome vehicles only)
  • Principles of Operation
    The speed control system is designed to maintain vehicle speed above 40 km/h (25 mph). After the ON switch is depressed, depressing the SET/ACCEL or COAST switch will activate the speed control servo. To increase a set speed, either depress and hold for continuous acceleration, or momentarily tap the SET/ACCEL switch for 1.6 km/h (1 mph) acceleration increments. To decrease a set speed, depress and hold the COAST switch until the target speed is reached, or momentarily tap the COAST switch for 1.6 km/h (1 mph) deceleration increments. When the speed control system has been disabled by tapping the brake pedal, the RESUME switch can be depressed and the vehicle will return to the original set speed if the vehicle is traveling over 40 km/h (25 mph) and the OFF switch has not been depressed.
    NOTE: The deactivator switch is provided as an additional safety feature. Normally, when the brake pedal is depressed, an electrical signal from the brake lamp circuit to the speed control servo will deactivate the system. Under increased brake pedal effort, the deactivator switch will open and remove power to the speed control servo, releasing the throttle independently of the speed control servo.
    NOTE: The air bag sliding contact provides the electrical interface between the steering column wiring and the speed control actuator switches in the steering wheel.
    The inputs to the speed control servo are:
    • vehicle speed signal
    • speed control actuator switches
    • brake pedal position (BPP) switch
    • clutch pedal position (CPP) switch (if equipped)
    • deactivator switch
    The outputs of the speed control servo are:
    • speed control indicator (Excursion and Super Duty)
    • speed control cable controlling the throttle position
    Inspection and Verification
    NOTE: If any concerns are noted with the speedometer or horn, address those concerns by referring to their associated sections before continuing speed control diagnosis.
    NOTE: When in speed control mode, initial depression of the clutch pedal may cause a normal momentary increase of engine rpm.
    NOTE: If the vehicle is a diesel, refer to the Powertrain Control/Emissions Diagnosis (PC/ED) manual.
    1. Verify the customer concern by operating the speed control system.
    1. Visually inspect for obvious signs of mechanical and electrical damage.

    Visual Inspection Chart Mechanical Electrical
    • Speed control cable
    • Speed control cable not attached to throttle
    • Central junction box (CJB) Fuse:
      • 6 (15A) (Excursion)
      • 8 (10A) (Motorhome)
      • 13 (20A) (Excursion, Super Duty)
      • 15 (5A) (Super Duty, Excursion)
      • 28 (10A) (Super Duty, Motorhome)
    • Speed control actuator switches
    • Brake pedal position (BPP) switch
    • Clutch pedal position (CPP) switch (if equipped)
    • Deactivator switch
    • Speed control servo
    • Wiring
    • Loose, corroded, or dirty connections
    • Bulb (Excursion and Super Duty)

    1. If the fault is not visually evident, go to the Self-Test Diagnostics - Excursion or Super Duty (Excursion, Super Duty), or verify the symptom and proceed to the Symptom Chart (Motorhome).
    2. Self-Test Diagnostics - Excursion, Super Duty
      WARNING: This test is a key on engine off (KOEO) test only that is conducted in park only with emergency brake fully engaged.
      1. Enter Self-Test Diagnostics by depressing the speed control OFF switch while turning the ignition key ON, making sure the engine does not start and is not running. The speed control indicator on the instrument panel will flash once to indicate that speed control module entered the diagnostic mode. FIVE ADDITIONAL FLASHES AT THIS POINT INDICATE A DEFECTIVE SPEED CONTROL SERVO. Release the OFF switch.
      1. Press the remaining switches in this sequence: ON, RESUME, COAST and SET/ACCEL.
        The speed control indicator lamp will flash as each switch is depressed. Press each switch in the sequence immediately after the indicator light goes out for the previous switch.
      1. A lamp flash with the last button (SET/ACCEL) indicates that the STATIC test passed. If the lamp does not flash with the last button and there are no additional flashes of the lamp, the switch is defective.
        If the lamp does not flash with the last button, and additional flashes occur, follow the chart below for trouble codes:
      • 2 Flashes - BPP defective, circuit is defective, brake applied, CPP switch or jumper (if equipped).
      • 3 Flashes - Deactivator switch is open or circuit defective.
      • 4 Flashes - Vehicle speed signal is out of range or circuit is defective.
      1. Immediately after the STATIC test, the speed control servo does a DYNAMIC test by automatically actuating the throttle lever from 8 mm (0.315 in) to 12 mm (0.472 in) of travel from the idle position. During the DYNAMIC throttle pull, observe throttle movement to witness any binding or sticking of the speed control cable and correct connection of speed control cable to throttle lever. Make sure the THROTTLE RETURNS BACK TO IDLE POSITION.
      1. Return ignition switch to the OFF position and proceed to the Symptom Chart.

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1 Answer

The abs light is permanently on for past 6 months,though brakes working fine.about a month ago,brake fluid has slow leak and pperiodically red brake light appears but disappears as soon as you...

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I have a 2001 gmc sierra and the emergency brake will not engage. I can push the pedal to the floor and it will lock in place and the light will flash but I still can drive it with know problem. Another...

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Emergency brake light on 92 chevy blazer

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