Foreign Minister Moshe Dayan suggested yesterday that during the forthcoming talks of Prime Minister Menachem Begin with President Carter in Washington, Israel should open to new ideas yet should not yield on issues vital to its survival.

In a radio interview, Dayan said, "We are in an advanced stage in our negotiations with Egypt and must explore the essence of the issues." He said Israel should be guided by three criteria:

Be open to new ideas and not be bound by old conceptions.

Keep in mind longrange military and political considerations, rather than seeing only a few months ahead.

Know what positions must be consistently and even stubbornly asserted, and which can be the subject for compromise.

Dayan declared that a fresh approach is necessary because a separate peace with Egypt now appears impossible. A comprehensive settlement, including Jordan and Syria, is improbable because of the preconditions imposed be these countries even to join the peace negotiations, he said.

He also noted that Egypt now insists that the declaration of principles which is being negotiated through the good offices of Assistant Secretary of State Alfred Atherton must also satisfy Jordan's King Hussein.

Ahterton, who returned to Israel from Egypt last night, is to meet with Dayan today. Before leaving Cairo, Atherton said Egypt has offered "concrete" and "helpful" ideas which he will present to the Israelis. He also predicted several more shuttles between the two capitals.

Dayan, asked by the Israeli state radio's interview if he was pessimistic, said he was not, Rumors to that effect came from inaccurate leaks after his briefing of a parliamentary committee and other officials, he said.

Nevertheless, he added, there are important difficulties. He said the Egyptian position is hardening, both on the topic of Israeli withdrawal from occupied territories and on Palestinian self-determination.

Dayan blamed the hardening of the Egypt position on the absence of support for Sadat in the Arab world, including Saudi Arabia and Jordan, on whose support the president had counted. Dayan said the Egyptians now insist on withdrawal from all occupied areas, including the West Bank of the Jordan River and the Golan Heights, rather than just Sinai.

On the Palestinian issue, he said that since the Jordanian position is more extreme, and Egypt is not willing to negotiate alone, Sadat has become less flexible.