TC reported rear DT intermittent BCU fault. ~~~~~ CE checked & found 3640 intermittent BCU Fault.     #3640 Check from Tims FC-327 BCU speed probe 4 fault multiple times. Further check speed probe 4 having high resistance and reading fluctuate when knock tacho gen-4. Replaced Tacho gen-4 and function check ok. Limited movement checked ok. Tacho Gen:- Old: 15/04/468. New: 9928026. Not: 2414784 raised. Done by Sanip/Koh.  04/09/22.