Diagnostic Testing of Assembly Line Data Link Cable
Original Publication Date: 1987-Feb-01
Included in the Prior Art Database: 2005-Jan-31
This article describes a technique to test quickly and accurately the assembly line data link (ALDL) cable which connects a diagnostic technician terminal to a vehicle. The ALDL cable is used to connect the diagnostic technician terminal to the vehicle. It plugs into a connector that ties the terminal to the serial data link that interconnects the vehicle on-board computers. This allows the terminal to receive data from the on-board computers to determine the state of actuators, switches, valves, etc., and the values read from various sensors. This information is used by the terminal to diagnose vehicle problems. If the cable has been damaged or the circuits supporting it are faulty, an erroneous diagnosis might be made resulting in an incorrect repair action.