India, Sept. 23 -- Family members of Tata Sons chairman N Chandrasekaran hold business relations with TVS Motor Co. Ltd, documents showed, raising governance questions after a decisive vote by the automaker's chairman-emeritus Venu Srinivasan won a fresh term for Chandrasekaran.

Neither Srinivasan nor Chandrasekaran updated the Tata Sons board about this external relationship, an executive aware of the matter said, in a potential violation of the Tata Code of Conduct. While Tata Sons said the formation of the family members' company was disclosed and that there was no need to disclose the specific business transaction, Tata Trusts said Srinivasan made no such disclosure to it, deepening the rift at the helm of India's largest conglomerat...