Thomas, who is best known for his anti-corruption crusades, is accused of allegedly making objectionable remarks against two sitting high court judges in a complaint sent to the Central Vigilance Commission (CVC).
The court has fixed April 2 as next date of hearing in the case.
On December 19 last year, the Kerala government suspended high-profile IPS officer Jacob Thomas. The top cop was suspended after he criticised the Pinarayi Vijayan government's response to Cyclone Ockhi.
He was heading Institute of Management in Government (IMG), Kerala government's apex body for training public officials.
Thomas is also facing departmental action for writing a book, titled 'Sravukalku Oppam Neenthumbol' (Swimming with Sharks). (ANI)