Chevrolet Sonic Repair Manual: Brake Warning System Description and Operation

Chevrolet Sonic Repair Manual / Chassis / Brakes / General / Brake Warning System Description and Operation

Brake Warning Indicator

Brake Warning Block Diagram

B80Park Brake SwitchB20Brake Fluid Level SwitchK9Body Control ModuleP16Instrument Cluster

(HW)	Hard-Wired
(HW)	Hard-Wired
(DA)	Serial Data
(B80)	B80 Park Brake Switch
(B20)	B20 Brake Fluid Level Switch
(K9)	K9 Body Control Module
(P16)	P16 Instrument Cluster

The instrument cluster turns the brake warning indicator ON when the following occurs:

The instrument cluster performs the bulb check. The brake warning indicator illuminates for 5 s.
When the Electronic Brake Control Module (EBCM) detects low brake fluid level it sends a serial data message to the instrument cluster, which will illuminate the red brake indicator.
The Body Control Module (BCM) detects that the parking brake is engaged. The instrument cluster receives a serial data message from the BCM requesting illumination.

Driver Information Center Messages: When the Electronic Brake Control Module (EBCM) detects low brake fluid level it sets DTC C0267 and sends a serial data message to the Driver Information Center , which will display Brake Fluid Low message.

Brake System Warning Light

The vehicle brake system consists of two hydraulic circuits. If one circuit is not working, the remaining circuit can still work to stop the vehicle. For normal braking performance, both circuits ...

Master Cylinder Bench Bleeding

Warning: Refer to Brake Fluid Irritant Warning. Caution: Refer to Brake Fluid Effects on Paint and Electrical Components Caution. Secure the mounting flange of the bra ...

Other materials:

Windshield Wiper/Washer
Sedan Hatchback The windshield wiper/washer lever is on the right side of the steering column. Move the lever to one of the following positions: HI: Use for fast wipes. LO: Use for slow wipes. Hatchback Shown, Sedan Similar INT: (Intermittent Wipes): Move the lever up to INT for intermi ...

Mobile Telephone Microphone Replacement
Mobile Telephone Microphone Replacement Callout Component Name Preliminary Procedure Remove the dome lamp bezel. Refer to Dome Lamp Bezel Replacement. 1 Mobile Telephone Microphone Procedure ...

Rear Wheelhouse Panel Liner Extension Replacement
Rear Wheelhouse Panel Liner Extension Replacement Callout Component Name Preliminary Procedure Remove the tire and wheel assembly. Refer to Tire and Wheel Removal and Installation. 1 Rear Wheelh ...

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