Diagnosis And Testing

The complexity of the electronics involved with the JaguarNet system, of which the GPS antenna and navigation display are parts, and the multiplexed communication network which are connected to it preclude the use of workshop general electrical test equipment. Therefore, reference should be made to the approved Jaguar diagnostic system for detailed instructions on testing the vehicle emergency message system unit

The approved Jaguar diagnostic system tests and analyses all functions of the vehicle emergency message system and the various systems affected by it

Where a fault is indicated, some basic diagnostic methods may be necessary to confirm that connections are good and that wiring is not damaged before installing a new component