Computers and Control Systems: Tools and Equipment

Jaguar Portable Diagnostic Unit (PDU)
The franchised Jaguar Dealer is equipped with the PDU, a comprehensive electrical diagnosis system, specific to Jaguar vehicles,that can interrogate not only the engine management system, but all control modules on the vehicle which are connected to the communications bus, and then decode and display any diagnostic trouble codes including enhanced diagnostic information. The PDU performs a number of functions, including:

- DataLogger
- Engine Set-up
- Diagnostic Trouble Codes
- Control Module Programming
- Digital Multimeter

Fig. 1 Jaguar PDU And Base Station Assembly:

Fig. 1 shows two Portable Diagnostic Units on charge on the base station and one removed ready for use.

DataLogger
DataLogger is designed to identify intermittent faults in the vehicle electronics and can capture information from up to three sources simultaneously, i.e. Serial Communications, Vehicle Interfacing and Measurement Probes.

Engine Set-up
Engine Set-up allows adjustable engine parameters to be set to their optimum position.

Fig. 1 Adaptor Coupling For Use With Digital Multimeter:

Diagnostic Trouble Codes
Diagnostic Trouble Codes enables the PDU to monitor selected codes and decode and display any codes or enhanced codes logged by the control modules, together with a count of occurrences. The fault codes recorded on the control modules and the PDU screen can be cleared using this function.

Control Module Programming
Control Module Programming is used as a setting / calibration process for the security system, trip computer and instrument pack.

Digital Multimeter
Digital Multimeter provides the ability, using measurement probes, to measure voltage, current, resistance, frequency, pulse width, pulse period and duty cycle.