WHAT IF THE ULTRA-LINK DIAGNOSTIC TOOL GIVES NO RESPONSE OR AN INCORRECT RESPONSE?
It is necessary for the vehicle key to be on for proper operation of the Ultra-link Diagnostic Tool. It may be necessary to reboot the system. This is easily accomplished by un-plugging and re-plugging the unit. Make sure that there is power to the unit, this requires in some vehicles that the key switch of the vehicle be activated in order to supply a power source to the Ultra-Link Diagnostic Tool. Note: If no message has been received, the values for the engine functions are replaced by asterisks. This indicates that the bus is not connected properly, bus wires are reversed, or the data bus is inactive. You may need to reboot.
