Chevrolet Sonic Repair Manual: Horns System Description and Operation
- System Description
-
The horn system consists of the following components:
- HORN fuse
- Underhood fuse block (contains PCB horn relay)
- Horn switch
- Horn
- Body control module (BCM)
- System Operation
-
The vehicle horn system is activated under the following conditions:
- When the horn switch is depressed
- The BCM commands the horns ON under any of the following conditions:
- When the content theft deterrent system detects a vehicle intrusion?€”For further information refer to Theft Systems Description and Operation.
- When the panic button is depressed on the remote control door lock transmitter?€”For further information refer to Keyless Entry System Description and Operation.
- When the keyless entry system is used to lock the vehicle, a horn
chirp may sound to notify the driver that the vehicle has been locked.
The notification feature may be enabled or disabled through personalization.
For further information refer to Keyless Entry System Description and
Operation.
When the OnStar?® system is used to sound the horns if equipped?€”For further information, refer to OnStar Description and Operation.
- Circuit Operation
-
Battery positive voltage is applied at all times to the horn relay coil and the horn relay switch. Pressing either of the horn switches applies ground to the horn relay control circuit. The BCM may also apply ground to the horn relay control circuit as described above. When the horn relay control circuit is grounded, the horn relay is energized and battery positive voltage is applied to the horns through the horn control circuit. The horns sound as long as ground is applied to the horn relay control circuit.
Horn Replacement
Horn Replacement
Callout
Component Name
Preliminary Procedure
Remove the front wheelhouse liner front. Refer to Front Wheelhous ...
Steering Wheel Horn Contact Replacement
Steering Wheel Horn Contact Replacement
Callout
Component Name
Preliminary Procedure
Remove the steering wheel inflatable restr ...
Other materials:
Radio without Touchscreen
To set the time and date:
1. Press CLOCK.
2. Select Time and Date Settings.
3. Select Set Time or Set Date.
4. Turn the MENU/TUNE knob to adjust the highlighted value.
5. Press the MENU/TUNE knob to select the next value.
6. To save the time or date and return to the Time and Date Settings men ...
Repairs and Inspections Required After a Collision
Warning: Restraint systems can be damaged in a collision. To help
avoid injury and ensure that all parts in need of replacement are replaced:
Replace any seat belt system that was in use during the collision serious
enough to deploy any automatic restraint device such as air bags ...
Intake Manifold Cleaning and Inspection
Clean the intake manifold mating surfaces.
Inspect the intake manifold (2) for damage.
Inspect the intake manifold for cracks near metallic inserts.
Inspect the crankcase ventilation passages in the intake manifold face for
blockage.
Warning: Wear safety glasses in or ...
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