Discovery 2. Manual — part 353

DRIVING AIDS

DESCRIPTION AND OPERATION

86-8-3

1 PDC sounder
2 PDC switch
3 Fusible link
4 Ignition switch
5 Fuse
6 PDC ECU
7 PDC sensors

DRIVING AIDS

86-8-4

DESCRIPTION AND OPERATION

Description

General
Park Distance Control (PDC) is introduced on vehicles from 03 model year. PDC provides an audible warning to the
driver when any obstacles are in the path of the vehicle during a reversing manoeuvre. The purpose of the system is
to assist the driver when parking and is not designed as a crash avoidance system or a replacement for visual
interpretation by the driver.

The system comprises four ultrasonic sensors in the rear bumper, an ECU, a fascia mounted momentary switch and
a sounder unit. 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 PDC ECU to calculate the distance from an object.

The fascia mounted switch allows the driver to de-activate the PDC system if operation is not required or the vehicle
has a trailer attached.

DRIVING AIDS

DESCRIPTION AND OPERATION

86-8-5

PDC ECU

A = Vehicles without rear air conditioning

B = Vehicles with rear air conditioning

1 Body 'E' post
2 PDC ECU

3 PDC sounder
4 Mounting bracket

The PDC ECU is located in the LH side of the luggage compartment. A bracket is attached to the 'E' post, behind the
trim panel and provides for the attachment of the ECU and the PDC sounder.

On vehicles without rear air conditioning, the bracket is located inboard on the LH 'E' post, adjacent to the luggage
compartment trim panel. On vehicles with rear air conditioning, the bracket is located outboard on the LH 'E' post,
adjacent to the outer body panel.

The bracket has integral studs which provide for the attachment of the ECU with nuts. The ECU is located with the
harness connectors uppermost to assist access. The PDC sounder is located on the opposite side of the bracket and
is secured with screws, lockwashers and nuts.

DRIVING AIDS

86-8-6

DESCRIPTION AND OPERATION

PDC ECU Connector Pin Details

a Connector C0958

b Connector C0957

Connector C0958

Connector C0957

Pin No.

Description

Input/Output

1

Ignition switch power supply

Input

2

Sounder - Negative

Input

3

Not used

–

4

PDC Switch

Input

5

Not used

–

6

Reverse Gear signal

Input

7

Not used

–

8

Ground

–

9

Not used

–

10

Sounder - Positive 12V supply

Output

11

Not used

–

12

Not used

–

13

PDC Switch LED

Output

14 to 16

Not used

–

Pin No.

Description

Input/Output

1

Not used

–

2

Sensor - RH Inner - Signal

Input

3

Sensor - Rear LH Inner - Signal

Input

4

Sensor - Rear RH Outer - Signal

Input

5

Sensor - Rear LH Outer - Signal

Input

6 and 7

Not used

–

8

Ground - All sensors

Input

9

Not used

–

10

Power Supply - All sensors

Output

11 and 12

Not used

–