* ECB's Noyer doubts policy played big role in causing crisis

* Says c.banks need to eye impact of decisions more carefully

* Says ample liquidity may increase risk appetite, leverage (Adds comments from Noyer on exchange rates)

By Nelson Graves and Masayuki Kitano

TOKYO, Nov 16 (Reuters) - ECB governing council member Christian Noyer said on Monday that he didn't believe monetary policy played a central role in causing the global financial crisis, and that price stability should remain the main objective of central banks.

"While I doubt very much that monetary policy played a major role in triggering the crisis, I also belive that it can -- and should -- help in the future to better contribute to financial stability," Noyer told a Europlace forum in Tokyo.

"It should be made clear, in particular, that, whatever the new tasks and functions of central banks, price stability should remain the primary objective of monetary policy," said Noyer, who is also the governor of the Bank of France.

Noyer also said central banks will need to pay more attention to the impact of their decisions on financial systems, adding that abundant liquidity may increase risk appetite and lead to growth in leverage, the main factors behind the latest crisis.

Asked about the difficulties facing manufacturing firms in advanced economies, Noyer said: