More:Mass Effect: Hints: Citadel

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Contents 1 Scan the Keepers 2 Signal tracking

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Scan the Keepers

After you speak to Chorban in the Citadel Tower he requests that you scan the Keepers to collect data. There are 21 Keepers total throughout the compound. You will forfeit the chance to do this sidequest if you complete Jahleed's Fears. Here is a list of their locations.
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Wards

One in the hanger bay through C-Sec.

One in the right-most room in the Presidium Wards Access corridor.

One in the alleyway next to the market and Choras Den.

One in the upper market area.

One in the C-Sec Requisition Office.

One in the Traffic Control Room in C-Sec.

One inside Flux, by the quasar machines in the back left.

One to the right of the Med Clinic entrance.

One at the C-Sec Academy entrance.

Presidium

Four inside Citadel Tower.

One in the back room of the Emporium, left turn.

One on the balcony of the Embassy lounge.

One in the rectangular room at the right of the C-Sec HQ at the embassy.

One outside Citadel Tower to the left of Avina.

One in the Volus/Elcor office at the Embassy.

One opposite of Avina, halway between the Consort Chambers and the Emporium.

One outside the entrance of the Consort Chambers.

One outside the Wards Access entrance, very close to the arguing Preaching Hana and C-Sec officer.

Signal tracking

• While in the FLux you will see a Quasar Machine that has a strange signal coming from it. It traces to the following place in order:
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Wards Access Corridor: From the Medical Clinic, go to and up the elevator that takes you toward the Presidium. Take this corridor to a little area where people are talking. Check the terminal on the wall.

Financial District: Volus' Office, behind Volus.

Emporium: Turn right coming out of Volus' office and go past the Emporium Shopkeeper to a back hallway. Then, turn right again. Here you will encounter an A.I. that threatens to blow you and itself up. After the conversation select the A.I. and input the following code to override: Y, X, Y, A, X, A, A. Finish before it is done Siphoning off credits and you will get those credits. The amount varies, but you will get more the faster you enter the override code.

• Use the following trick when you find the source of the signal and you are given the option to deactivate the AI system. A faster way to do so and save a lot of credits and time is to shoot the power supply just beside you. This will overload the AI and net you more credits than trying to figure out the code.