Kia Rio: EBD(Electronic Brake-force Distribution) Operation

The Electronic Brake force Distribution (EBD) system as a sub-system of the ABS system is to control the maximum braking effectiveness by the rear wheels.

It further utilizes the efficiency of highly developed ABS equipment by controlling the slip of the rear wheels in the partial braking range.

The brake force is moved even closer to the optimum and controlled electronically, thus dispensing with the need for the proportioning valve.

The proportioning valve, because of a mechanical device, has limitations to achieve an ideal brake force distribution to the rear wheels as well as to carry out the flexible brake force distribution proportioning to the vehicle load or weight increasing. And in the event of malfunctioning, driver cannot notice whether it fails or not.

EBD controlled by the ABS Control Module, calculates the slip ratio of each wheel at all times and controls the brake pressure of the rear wheels not to exceed that of the front wheels.

If the EBD fails, the EBD warning lamp (Parking brake lamp) lights up.

Advantages

Comparison between Proportioning Valve and EBD

Failure Diagnosis

1. In principle, ESC and TCS controls are prohibited in case of ABS failure. 2. When ESC or TCS fails, only the failed system control is pr ...

ESC Control Module Components

1. Front - left tube 2. Rear - right tube 3. Rear - left tube 4. Front - right tube 5. MC2 6. MC1 7. ESC control module (HECU) 8. Damper 9. Bracket ...

See also:

Trouble Symptom Charts
Trouble Symptom 1 Trouble Symptom 2 Trouble symptom Probable cause Remedy The set vehicle speed varies greatly upward or downward "Surgin ...

Alternator: On-vehicle Inpection
   • Check that the battery cables are connected to the correct terminals. ...

Specifications
Items Specifications Rated voltage DC 5V Load Max. 1.5mA (When head lamp lighting) Operating voltage range DC 4.6 ~ 5.1V ...