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GM Tech Tip: Squeak Noise On Brake Pedal Application

Some customers may comment on a squeak noise when the brake pedal is applied or when released. This noise is normally heard when the brake pedal is slowly applied with the engine on or off, but can occur when the brake pedal is released. The noise may be isolated to the master cylinder area.

Tech Feature: Solving Brake Pedal Pulsation Complaints

Reoccurring pulsation complaints are perhaps the second most common reason a customer returns after having brake service. The brakes operate normally for the first 3,000 to 6,000 miles, but then the customer notices a high-speed pulsation when getting off the exit ramp on his way to work one morning. The customer returns to the shop with the pulsation complaint and leaves with usually one of two “fixes” – the rotors being machined or replaced. The usual explanation given the customer is that the rotors “warped.”

Tech Tip: Brake Pedal Sinks When First Pulling Away (2001-’05 Impala and Monte Carlo)

Customers may complain of a very slight loss of speed and sinking of the brake pedal when first pulling out of a driveway or parking lot.

Prius Tech Tip: Parking Brake Warning Light Stays Illuminated After the Parking Brake Pedal is Released

Some 2004 – 2007 model year Prius owners may complain that the Parking Brake Warning Light stays illuminated after the parking brake pedal is released. The parking brake assembly, which includes the parking brake switch, has been modified to correct this condition. Use the following repair procedure to remove and replace the parking brake pedal assembly ….

Tech Tip: Use Anti-Squeal Shim to Cure Low Brake Pedal on 4Runners

Some customers with a 2003-2005 4Runner may experience a slightly lower brake pedal feel on an intermittent basis. A new brake pad anti-squeal shim service part has been developed to address this concern. Continue reading for the complete Repair Procedure ….

Tech Tip: Inconsistent/Unusual Brake Pedal Feel on Toyota 4Runners

Some customers with a 2003-2005 4Runner may experience a slightly lower brake pedal feel on an intermittent basis. A new brake pad anti-squeal shim service part has been developed to address this concern. Refer to the following Repair Procedure to solve this inconsistent brake pedal feel ….

Tech Tip: Uncovering the Cause of a Sinking, Low or Spongy Brake Pedal

To diagnose a sinking, low or spongy brake pedal, begin by isolating the master cylinder. Remove the lines from the master cylinder and insert blocking plugs into the ports. Press on the brake pedal. If the pedal is firm and hard, the master cylinder is good. If the pedal still drops, either air is in the unit or it is bypassing internally. Bleed the unit or ….

Toyota Tech Tip: Inconsistent/Unusual Brake Pedal Feel

Some customers with a 2003-2005 4Runner may experience a slightly lower brake pedal feel on an intermittent basis. A new brake pad anti-squeal shim service part has been developed to address this concern.

Tech Tip: Mercedes-Benz Brake Pedal Switch Adjustment

Fault codes C1200, C1201 or C1202 may be set in the ESP control module in the event of a misadjusted brake pedal switch on the following models: 129,170, 202, 208, 210, 215 and 220. Before adjusting the brake pedal switch, use DAS and check the switch for proper voltage supply. If replacing the switch, ensure that the correct part number is installed based on the vehicle model.

Tech Tip: Diagnosing a Sinking, Low or Spongy Brake Pedal

To diagnose a sinking, low or spongy brake pedal, begin by isolating the master cylinder. Remove the lines from the master cylinder and insert blocking plugs into the ports. Press on the brake pedal. If the pedal is firm and hard, the master cylinder is good. If the pedal still drops, either air is in the unit or it is bypassing internally. Bleed the unit or replace as necessary. Reconnect and bleed the system.