Description And Operation: Notes

DESCRIPTION 

Courtesy of CHRYSLER GROUP, LLC

The horn system includes the following major components:

1.	Refer to HORN SWITCH .
2.	Refer to BODY CONTROL MODULE .
3.	Refer to HORN .

An electrically-operated dual-note horn system is standard factory-installed equipment in this vehicle. The horn system features one combined low-note and high-note horn unit. The Power Distribution Center (PDC) contains the horn fuse and the horn relay. Pressing either side of the upper surface of the Driver Air Bag (DAB) trim cover in the center of the steering wheel actuates the horn switch contacts, which provides the vehicle operator with a convenient, audible signaling device that can be used to alert pedestrians or the operators of other vehicles in near proximity.

OPERATION 

The horn operates on battery current received from a horn relay located in the Power Distribution Center (PDC) through a fuse also located in the PDC. The vehicle operator can control typical horn system signaling through the horn switch within the hub of the steering wheel. When the upper surface of the Driver AirBag (DAB) trim cover is pressed, it provides a hard-wired ground path to the Body Control Module (BCM). In response to that input the BCM uses a Low Side Driver (LSD) to provide a ground path to the control coil of the horn relay. The horn system circuit is designed so the system will remain operational, regardless of the status of the ignition switch.

The horns can also be activated by the BCM to support each of the following features:

• Remote Keyless Entry System  - Remote Keyless Entry (RKE) system Lock  request audible verification.
• Remote Keyless Entry System  - RKE system Panic  mode audible alert for North American (NA) markets only.
• Remote Start System  - Remote Start System Start  request audible verification for NA markets only.
• Vehicle Theft Alarm  - Vehicle Theft Alarm (VTA) audible alarm except in vehicles manufactured for markets where an alarm siren is required.

The hard-wired circuits between components related to the horn system may be diagnosed using conventional diagnostic tools and procedures. Refer to the appropriate wiring information. The wiring information includes wiring diagrams, details of wire harness routing and retention, connector pin-out information and location views for the various wire harness connectors, splices and grounds. For proper wire repair, and connector repair procedures. Refer to CIRCUIT TESTING PROCEDURES or CONNECTOR TERMINAL REMOVAL or CONNECTOR TERMINAL INSTALLATION .

However, conventional diagnostic methods will not prove conclusive in the diagnosis of the horn system or the electronic controls and communication between modules and other devices that provide some features of the horn system. The most reliable, efficient and accurate means to diagnose the horn system or the electronic controls and communication related to horn system operation requires the use of a diagnostic scan tool.