- Symptoms - Hydraulic Brakes

Symptoms - Hydraulic Brakes

Important: The following steps must be completed before using the symptom tables.

1. Perform the Brake System Vehicle Road Test before using the brake symptom tables in order to duplicate the customer's concern. Road Test Procedure
2. Review the system description and operation in order to familiarize yourself with the system functions. Refer to the following:
- Brake Warning System Description and Operation
- Hydraulic Brake System Description and Operation
- Brake Assist System Description and Operation (Vacuum Assist)
- Brake Assist System Description and Operation (Hydraulic Assist)
- Disc Brake System Description and Operation in Disc Brakes

Visual/Physical Inspection

- Inspect for aftermarket devices which could affect the operation of the Hydraulic Brake System. Refer to Checking Aftermarket Accessories in Wiring Systems.

- Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.

- Inspect the brake fluid reservoir for the proper brake fluid level.

Intermittent

- Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent and Poor Connections in Wiring Systems.

Symptom List

- Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom:

- Brake Warning Indicator Always On

- Brake Warning Indicator Inoperative

- Reduced Brake Power Message Displayed

- Service Brake Booster Message Displayed

- Brake Pulsation

- Brake System Noise

- Braking Action Uneven - Pulls to One Side

- Braking Action Uneven - Front to Rear

- Brake Pedal Excessive Travel

- Brake Pedal Excessive Effort

- Brakes Drag

- Brake System Slow Release

- Brake Fluid Loss

- Brakes Self Apply When Turning Steering Wheel