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:

Rear Side Door Window Rear Guide Replacement
Rear Side Door Window Rear Guide Replacement Callout Component Name Preliminary Procedure Remove the rear side door trim panel. Refer to Rear Side Door Trim Replacement. 1 Rear Side Door Window R ...

Rear Bumper Fascia Replacement (Hatchback)
Rear Bumper Fascia Replacement Callout Component Name Preliminary Procedures Remove the screws from the rear wheelhouse liners to the rear fascia. Refer to Rear Wheelhouse Liner Replacement. Disconnect the rear electrical ...

Heater and Air Conditioning Evaporator Case Replacement
Air Conditioning (A/C) Evaporator Case Assembly Replacement Callout Component Name Preliminary Procedure Remove the instrument panel tie bar. Refer to Instrument Panel Tie Bar Replacement. Remove HVAC module. Refer to Hea ...

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