Switzerland coach Koebi Kuhn may also reshuffle his attack and must make one enforced change in defence but is feeling confident of surviving a passionate night at Fenerbahce's Sukru Saracoglu stadium following an impressive display on Saturday.
Turkey will be boosted by the return from suspension of Emre Belozoglu and Hamit Altintop.
Yildiray Basturk is also available for the 2002 World Cup semi-finalists but may not be judged match fit after several weeks out injured.
Trabzonspor striker Fatih Tekke may also be called in to strengthen the home side's attack while the defence is likely to remain unchanged despite weaknesses exposed by the two goals.
Fatih's team mate Huseyin Cimsir is suspended after picking up a yellow card in the first leg.
Terim said his side must look for an early goal in Istanbul.
'Two-nil is a significant advantage but the score may not be enough for them in Istanbul... If we find an early goal it could change the course of the tie' he said.
After Saturday's game Terim criticised the performance of his players and the referee for not awarding what he saw as a clear penalty.
Keeping up the tense atmosphere surrounding the tie Terim also complained that the Swiss had abused him and his team.
A stadium spokeswoman rejected a claim that he had been prevented from joining the post-match news conference.
The home side will also be looking to erase the memories of two years ago when they failed to reach the European Championship finals after a shock playoff defeat by Latvia.
'We won't treat the second leg much differently from the first' Kuhn told reporters on Sunday. 'But the Turks will have to commit themselves more this time -- which will allow us more room.
'The key to the match will be keeping control. If we don't allow ourselves to be provoked then I'm convinced that we'll be the ones attending next month's World Cup draw.'
Aggression levels certainly rose during the latter stages of Saturday's match with referee Lubos Michel handing out three yellow cards in four minutes.
One of them went to Swiss left back and regular free kick taker Ludovic Magnin who is suspended from the second leg.
'We will miss Magnin but I think the Swiss team is now in a position where it has strong replacements for every position' Kuhn insisted.
'Christoph Spyher (of Eintracht Frankfurt) will come in for Magnin and I'm sure he will play a big match in Istanbul.'
Kuhn is likely to consider a voluntary switch up front following a below-par performance by towering Stuttgart striker Marco Streller.
He missed a great opportunity to score early in the second half and could be replaced by Breda's Johan Vonlanthen.
Turkey: Volkan Demirel; Umit Ozat Ibrahim Toraman Alpay Ozalan Serkan Balci; Hamit Altintop Emre Belozoglu Yildiray Basturk Tumer Metin; Hakan Sukur Fatih Tekke
Switzerland: Pascal Zuberbuehler; Philipp Degen Patrick Mueller Philippe Senderos Christoph Spycher Daniel Gygax Johann Vogel Tranquillo Barnetta Ricardo Cabanas Alex Frei Johan Vonlanthen or Marco Streller
Referee: Frank de Bleeckere (Belgium)