Published: 11-May-2011

2007.0 Range Rover Sport (LS), 413-06

Horn (G830759)

DIAGNOSIS AND TESTING
Overview

Two horns are fitted to the vehicle, a high tone and a low tone. The horns are mounted on each side of the radiator and are operated by the two horn switches on the steering wheel. The horns are also used by the vehicle alarm system.

For information on the description and operation of the system: REFER to: Horn (413-06 Horn, Description and Operation).

Inspection and Verification
  1. Verify the customer concern.
  1. Visually inspect for obvious mechanical or electrical faults.

Visual inspection

MechanicalElectrical
  • Horns condition and fitment
  • Battery condition and state of charge
  • Fuses
    • Battery junction box (BJB) - fusible link 17E
    • Central junction box (CJB) - fuse 12P
  • Relay
    • Central junction box (CJB) - horn relay
  • Electrical connections
  • Horn switches
  • Clock spring
  • Central junction box (CJB)
  • Battery junction box (BJB)
  1. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
  1. Use the approved diagnostic system or a scan tool to retrieve any diagnostic trouble codes (DTCs) before moving onto the symptom chart or DTC index.
      • Make sure that all DTCs are cleared following rectification
Symptom chart
SymptomPossible causesAction
Horn/s operate with a muffled tone
  • Low battery voltage
  • Horn circuit fault
  • Horn switch fault
  • Horn/s faulty
Check the battery condition and state of charge. Check the horn circuit. Check for DTCs indicating a horn circuit fault.
Horn/s inoperative
DTC index
NOTE:

Generic scan tools may not read the codes listed, or may read only 5-digit codes. Match the 5 digits from the scan tool to the first 5 digits of the 7-digit code listed to identify the fault (the last 2 digits give extra information read by the manufacturer-approved diagnostic system).

DTCDescriptionPossible causesAction
B1C5512 Horn relay
  • Horn relay circuit: short circuit to power
Refer to the guided diagnostic routine for this code on the approved diagnostic system.
B1C5514 Horn relay
  • Horn relay circuit: high resistance
  • Horn relay circuit: short circuit to ground
Refer to the guided diagnostic routine for this code on the approved diagnostic system.
B1C5612 Horn relay output circuit
  • Horn relay output circuit: short circuit to power
Refer to the guided diagnostic routine for this code on the approved diagnostic system.
B1C5614 Horn relay output circuit
  • Horn relay output circuit: high resistance
  • Horn relay circuit: short circuit to ground
Refer to the guided diagnostic routine for this code on the approved diagnostic system.