Discovery II
DRIVING AIDS
DESCRIPTION AND OPERATION
86-8-7
Inputs and Outputs
Two connectors provide the interface between the PDC ECU and the external PDC components.
The ECU receives inputs from the following:
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Reverse lamp circuit – for system activation when reverse gear is selected
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PDC switch – for activation and de-activation of the system
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Ignition switch – power supply for system operation.
The ECU outputs to the following:
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Sensors – power and ground connections
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Sensor – digital signal transmit and receive signals
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Sounder – signal for sounder operation
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PDC Switch – power supply for switch LED operation.
Diagnostics
The PDC ECU has no diagnostic connection to enable faults to be retrieved using TestBook/T4. An on-board
diagnostic routine monitors the system and alerts the driver to a system fault by emitting a tone from the sounder.
If a PDC system fault has occurred, the sounder will emit a continuous tone for 3 seconds and the PDC switch LED
will flash continuously when reverse gear is selected.