Symptoms - Hydraulic Brakes

Symptoms - Hydraulic Brakes

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


1. Perform Diagnostic System Check - Vehicle (Diagnostic System Check - Vehicle) before using the brake indicator symptom tables in order to verify that all of the following are true:

* There are no DTCs set.
* The control module(s) can communicate via the serial data link.

2. Perform the Brake System Vehicle Road Test (Brake System Vehicle Road Test) 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)
* Hydraulic Brake System Description and Operation (Hydraulic Brake System)
* Brake Assist System Description and Operation (Brake Assist System)
* Disc Brake System Description and Operation (Description and Operation)

Visual/Physical Inspection

* Inspect for aftermarket devices which could affect the operation of the brake warning system. Refer to Checking Aftermarket Accessories (Checking Aftermarket Accessories).
* Inspect the easily accessible or visible system components for obvious damage or conditions which could 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 (Testing for Intermittent Conditions and Poor Connections).

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)