Computers and Control Systems: Description and Operation

Multi Protocol Adapter

MPA And Cables:

MPA Connected For DTC Retrieval And Diagnosis:

MPA Connected For Downloading Software:

MPA Connected For Data Logging During A Drive Cycle:

The MPA is introduced to allow existing PDU hardware to communicate with the CAN, SCP and ISO 9141/2 networks. The MPA also:
- increases the processing power and memory of the PDU (the MPA contains 7 times as much useable memory as the PDU)
- improves data logger performance
- can be used as a diagnostic trip recorder, without the PDU, to record data during a drive cycle
- retains stored data for up to 16 hours
- provides a "flash" programming facility to enable updates of control module software

A LED on the MPA indicates when the MPA is receiving electrical power. An illuminated pushbutton, on a cable connected to the MPA, invokes data logging when the MPA is used as a diagnostic trip recorder. Additional cables are introduced to connect the MPA to the:
- PDU base station and the PDU, when loading the diagnostics software
- vehicle and the PDU, during diagnostic procedures.