Chevrolet Sonic manuals

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
Hard-Wired
Serial Data
B80 Park Brake Switch
B20 Brake Fluid Level Switch
K9 Body Control Module
P16 Instrument 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:

Connection Settings
Select and the following may display: Bluetooth Settings Change Ringtone Ringtone Volume Bluetooth Settings Select this feature to: Connect, disconnect, or delete a device Change or set a Personal Identification Number (PIN) Turn on or off the Bluetooth connection Check the dev ...

Body Side Frame Rocker Reinforcement Replacement
Removal Procedure Warning: Refer to Approved Equipment for Collision Repair Warning. Warning: Refer to Glass and Sheet Metal Handling Warning. Note: The body side frame rocker reinforcement is made of Ultra High Strength Dual Phase Steel and ...

Relay Replacement (Attached to Wire Harness)
Removal Procedure Locate the relay. Refer to the Master Electrical Component List to locate the relay in the vehicle. Remove any fasteners which hold the relay in place. Remove any connector position assurance (CPA) devices or secondary locks. Note: Use care w ...

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