EB at tk cct N522. ATS alarm showed CBTC3515,N522. Napplied EB due to EB command/status mismatch. Reset EB ok. Proceeded in AM to next station. Fault recurred in between C TH SB to RFP SB, at tk cct N486. ~~~~~ 3515 EB at tk cct N522. ATS alarm showed CBTC applied EB due to EB command/status mismatch. Reset EB ok. Proceeded in AM to next station. Fault recurred in between CTH SB to RFP SB, at tk cct N486.  3515 obstacle detected FC 740. Further check found A side obstacle detectr wire broken. Joint back with wire connector and measure from cannon plug A side PIN A and B (7922/7923) 0.2ohm, B side PIN C and D 7925/9154 o.3 ohm. Shake test ok-Stable. Measure from FCP 93.7 stable wire no.7925/7154. Conduct limited movement no obstacle detected    occurance. Done by Saini/Zulq/Ashwin 45264