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:

Cruise Control
: Press to turn the cruise control system on and off. RES/+: Move the thumbwheel up briefly to make the vehicle resume to a previously set speed or hold upwards to accelerate. If cruise control is already active, use to increase vehicle speed. SET/−: Move the thumbwheel down briefly ...

Lane Departure Warning (LDW)
If equipped, LDW is intended to help avoid unintentional lane departures at speeds of 56 km/h (35 mph) or greater. LDW uses a camera sensor to detect the lane markings. The LDW indicator, , appears green if a lane marking is detected. If the vehicle departs the lane, the indicator will chang ...

Rear Seat Back Cushion Latch Release Knob Bezel Replacement
Rear Seat Back Cushion Latch Release Knob Bezel Replacement Callout Component Name 1 Rear Seat Back Cushion Latch Release Handle Bezel Procedure Use a flat-bladed tool to tilt the rear of the handle upward, then l ...

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