Symptoms - Hydraulic Brakes

Symptoms - Hydraulic Brakes

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


1. PerformDiagnostic System Check - Vehicle (Initial Inspection and Diagnostic Overview) before using the hydraulic brake symptom tables in order to verify that all of the following are true:

* There are no DTCs set.
* The control modules can communicate via the serial data link.

2. Perform theBrake System Vehicle Road Test (Component Tests and General Diagnostics) before using the hydraulic brake symptom tables in order to duplicate the customer's concern.
3. Review the system operation in order to familiarize yourself with the system functions. Refer to the following:

* Brake Warning System Description and Operation (Brake Warning System Description and Operation)
* Hydraulic Brake System Description and Operation (Hydraulic Brake System Description and Operation)
* Brake Assist System Description and Operation (Brake Assist System Description and Operation)
* Disc Brake System Description and Operation (Description and Operation)

Visual/Physical Inspection

* Inspect for aftermarket devices which may affect the operation of the brake warning system. Refer to Checking Aftermarket Accessories (Component Tests and General Diagnostics).
* Inspect the easily accessible or visible system components for obvious damage or conditions which may cause the symptom.

Intermittent

Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections (Component Tests and General Diagnostics).

Symptom List

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

* Brake Warning Indicator Malfunction (Brake Warning Indicator Malfunction)
* Brake Pulsation (Brake Pulsation)
* Brake System Noise (Brake System Noise)
* Braking Action Uneven - Pulls to One Side (Braking Action Uneven - Pulls to One Side)
* Braking Action Uneven - Front to Rear (Braking Action Uneven - Front to Rear)
* Brake Pedal Excessive Travel (Brake Pedal Excessive Travel)
* Brake Pedal Excessive Effort (Brake Pedal Excessive Effort)
* Brakes Drag (Brakes Drag)
* Brake System Slow Release (Brake System Slow Release)
* Brake Fluid Loss (Brake Fluid Loss)