Park Distance Control (PDC)

PARK DISTANCE CONTROL (PDC)

DESCRIPTION

General
Park Distance Control (PDC) provides an audible warning to the driver when any obstacles are in the path of the vehicle during forward and reverse parking maneuvers. The system consists of four ultrasonic sensors in each bumper, an ECU, a sounder and a parking switch.

OPERATION

Power Distribution
Feed from the positive battery terminal (C0192) is supplied to fuse 27 and fuse 53 of the passenger compartment fuse box (C0632) on an R wire. Fuse 27 (C0582) provides a constant battery feed to the Body Control Unit (BCU) (C0662) on an RP wire.

Fuse 53 (C0583) provides a constant battery feed to the ignition switch (C0028 on V8 vehicles) on an R wire. When the ignition switch is turned to the 'ignition' position, current flows across the switch (C0028 on V8 vehicles) to fuse 6 of the passenger compartment fuse box (C0585) on a G wire. Fuse 6 (C0587) provides an ignition feed to the PDC ECU (C0957) on a GN wire. The PDC ECU (C0957) is earthed on an NB wire.

PDC Switch
The PDC ECU (C0957) monitors the condition of the PDC switch (C0700) by providing a feed on an NUY wire. When the switch is pressed, an earth path is created on an N wire. Sensing this, the PDC initiates the PDC system, and provides a feed to the switch tell-tale LED (C0700) on an NWY wire.

Rear PDC

RH Outer Sensor
The PDC ECU (C0958) provides a feed to the RH outer PDC sensor (C0966) on a GP wire. An earth path is provided for the sensor by the PDC ECU on an NY wire. The PDC sensor outputs a pulsed signal to the POC ECU on a YN wire, which the POC ECU translates into a distance reading.

RH Inner Sensor
The PDC ECU (C0958) provides a feed to the RH inner PDC sensor (C0965) on a GS wire. An earth path is provided for the sensor by the PDC ECU on an NU wire. The PDC sensor outputs a pulsed signal to the PDC ECU on a YB wire, which the PDC ECU translates into a distance reading.

LH Inner Sensor
The PDC ECU (C0958) provides a feed to the LH inner PDC sensor (C0964) on a GN wire. An earth path is provided for the sensor by the PDC ECU on an NB wire. The PDC sensor outputs a pulsed signal to the PDC ECU on a YG wire, which the PDC ECU translates into a distance reading.

LH Outer Sensor
The PDC ECU (C0958) provides a feed to the LH outer PDC sensor (C0963) on a GB wire. An earth path is provided for the sensor by the PDC ECU on an NW wire. The PDC sensor outputs a pulsed signal to the POC ECU on a YS wire, which the PDC ECU translates into a distance reading.

PDC Sounder
The PDC ECU coverts the signals received from the rear PDC sensors and outputs a pulsed signal to the PDC sounder. The PDC sounder (C0987) is located on the RH side of the luggage and is provided a positive signal on a UR wire, and a negative signal on a US wire.

Front PDC

RH Outer Sensor
The PDC ECU (C1457) provides a feed to the RH outer PDC sensor (C0403) on a GP wire. An earth path is provided for the sensor by the PDC ECU on an NY wire. The PDC sensor outputs a pulsed signal to the PDC ECU on a YN wire, which the PDC ECU translates into a distance reading.

RH Inner Sensor
The PDC ECU (C1457) provides a feed to the RH inner PDC sensor (C0401) on a GS wire. An earth path is provided for the sensor by the PDC ECU on an NU wire. The PDC sensor outputs a pulsed signal to the PDC ECU on a YB wire, which the PDC ECU translates into a distance reading.

LH Inner Sensor
The PDC ECU (C1457) provides a feed to the LH inner PDC sensor (C0400) on a GN wire. An earth path is provided for the sensor by the PDC ECU on an NB wire. The PDC sensor outputs a pulsed signal to the PDC ECU on a YG wire, which the PDC ECU translates into a distance reading.

LH Outer Sensor
The PDC ECU (C1457) provides a feed to the LH outer PDC sensor (C0402) on a GB wire. An earth path is provided for the sensor by the PDC ECU on an NW wire. The PDC sensor outputs a pulsed signal to the PDC ECU on a YS wire, which the PDC ECU translates into a distance reading.

PDC Sounder
The PDC ECU coverts the signals received from the front PDC sensors a feed to the front sounder (C0405) on a US wire. The PDC sounder is located behind the lower edge of the fascia, above the drivers footwell and is earthed (C0369) on an NB wire.

I Bus
The PDC ECU (C0957) receives the following information on the I-bus via the instrument pack (C0233) on a WSY wire:
- Vehicle speed
- Reverse gear selected
- Trailer fitted.