Chevrolet Sonic Repair Manual: Brake Warning System Description and Operation

Chevrolet Sonic Repair Manual / Accessories / Storage / 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 ...

Engine Oil Pressure Indicator Switch Replacement

Engine Oil Pressure Indicator Switch Replacement Callout Component Name Preliminary Procedure Remove the air conditioning compr ...

Other materials:

Automatic Headlamp System
When it is dark enough outside and the exterior lamp control is in the automatic position, the headlamps come on automatically. See Exterior Lamp Controls. The vehicle has a light sensor on top of the instrument panel. Make sure it is not covered, or the headlamps will be on when they are not ...

Rear Brake Hose Replacement (Body to Axle - Disc Brake)
Removal Procedure Warning: Refer to Brake Dust Warning. Warning: Refer to Brake Fluid Irritant Warning. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle. Remove the tire and wheel assembly. Refer to Tire and Wheel Removal and Install ...

Driver or Passenger Seat Shoulder Belt Replacement (with A69)
Driver or Passenger Seat Shoulder Belt Replacement Callout Component Name Warning: Refer to SIR Warning. Warning: Refer to SIR Inflator Module Handling and Storage Warning. Warning: Refer to SIR ...

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