LR3/Disco 3
GENERAL
The parking aid provides an audible warning to the driver when any obstacles are in the path of the vehicle during a
forward (if front sensors fitted) or reversing manoeuvre. The purpose of the system is to assist the driver when parking or
manoeuvring in restricted space. It is not designed as a crash avoidance system or a replacement for visual interpretation
by the driver.
The parking aid system is not standard on all vehicles and some vehicles may be fitted with rear sensors only and higher
specification vehicles may be fitted with both front and rear sensors.
The system comprises four ultrasonic sensors in the rear bumper, four ultrasonic sensors in the front bumper (if fitted), a
control module, a fascia mounted control switch, a rear sounder unit and a front sounder unit (integral with instrument
cluster).
The system operates using ultrasonic signals which are transmitted by the sensors. The reflected echo from this output is
received by the sensors and used by the parking aid module to calculate the distance from an object.
The fascia mounted switch allows the driver to deactivate the rear and front (if fitted) parking aid system, if operation is not
required.
PARKING AID MODULE
The parking aid module is located in the rear left hand side of the luggage compartment, behind the side trim panel.
The parking aid module uses a single microprocessor to perform the following tasks:
Control of the ultrasonic sensors
Monitoring of the sensors
Evaluation of received echo signals from the sensors
Noise and disturbance suppression
Control of the parking aid sounders
Monitoring of the sounders and leads
Control and monitoring of the switch status LED and lead
Evaluation and monitoring of the control inputs
Management of diagnostic and test functions
Monitoring of power supply
Communication via diagnostic link.
Parking Aid connector Pin Details
5
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Parking aid switch
