TC reported intermittent BCU fault at car rear DT. ~~~~~ Check Tims observed FC-327/323 speed probe 4 fault. Check found tachogen 4 resistance fluctuating. Confirm and c/o tachogen 4. Depot shunting done ok. No fault occur. Tachogen 4: Old s/n: 1433303. New s/n: 1504472. Not: 2294604 raised. Done by Sanip. 17/07/21.