Another two prototype locomotives were produced in 1978 as type 201Ec (also known as type 202E). Main changes introduced were an improved secondary suspension, multiple unit control and several small modernisations, like automatic door control. Wheelbase of bogies increased from 3,500 m to 3,800 m and they were connected with a linkage, but an overall wheelbase increased only by 0,08 m. Those locomotives were first given the numbers 501 and 502. As the production of ET22 continued, those were renumbered to 701 and 702 and finally to 1001 and 1002, which they carried until the end. A modernization was considered successful, but in a view of an economical crisis in 1980s in Poland, the authorities of a planned economy lost an interest in starting a production of an improved locomotive.