It is a 6-digit number assigned by MasterCard to each acquirer. If a merchant has different acquirers for Authorization versus Settlement, the merchant will have a separate ICA for each one. SIGIS is only collecting the Authorization Acquirer ICA at this time.
If your car is shaking it could be poor suspension alignment can cause a car to shake and vibrate, and other possible causes are bent or worn suspension parts, old tires, bentâ¦ wheels and bad brakes. If your car sounds especially rough at speed, the problem could lie with the car's spark plugs and wires.
If temperature cycling is the root cause, one would expect other relays in the car to have this problem as well but only the fuel pump relay has it. Don't know how the relay is mounted in your car but I think the mounting method used in the 92 Civic greatly contributes to mechanical shaking of the relay. The relay is bolted on the far end of a stick-like metal bracket like a baby's rattle and gets shaken like one under normal driving conditions.