2001 Jaguar S-Type CRUISE CONTROL

Diagnosis and Testing
The complexity of the electronics involved with the various electronic control modules and the multiplexed communication networks, preclude the use of workshop general electrical test equipment. Therefore, reference should be made to the PDU User Guide for detailed instructions on testing the cruise control circuit.
The PDU systematically tests and analyses all functions of the cruise control system.
Where a fault involving the cruise control circuitry is indicated by the PDU, before installing new components, some basic diagnostic methods may be necessary to confirm that connections are good and that wiring is not damaged.