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Home >> Cadillac >> 2007 >> STS Base, 3.6 7, AWD >> Repair and Diagnosis >> Body & Frame >> Door Locks >> Keyless Entry System And Remote Functions >> Description and Operation >> Keyless Entry System Description and Operation >> Starting the Vehicle/ACC mode
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Starting the Vehicle/ACC mode

To start a vehicle you must have a valid keyless entry transmitter present within the passenger compartment of the vehicle, the brake pedal depressed, and the transmission in Park or Neutral. If there are no problems with key fob detection, the vehicle will be able to be started, or put into accessory mode, when the Start/ACC/OFF mode button is pressed. If a key fob is not detected, or the radio frequencies are being interrupted, a message will display on the driver information center (DIC) stating, NO FOB DETECTED. A NO FOB DETECTED message may be caused by a low transmitter battery or radio frequency (RF) interference from aftermarket devices, such as 2-way radios, power inverters, computers, etc. High RF traffic areas, such as gas stations that use pay-at-the-pump RF transponders, may also cause interference. A NO FOB DETECTED message caused by an aftermarket device or high RF traffic is considered normal and does not require the replacement of any components. Replacing components in these situations will typically not increase the performance of the system. Simply moving the fob to a different location inside the vehicle may allow key fob communication to continue. If moving the key fob within the vehicle does not correct the message, a pocket is located in the center console for the key fob to slide into. The key fob must be inserted into the pocket with the buttons facing toward the front of the vehicle. With the key fob inserted into the pocket correctly, a low frequency coupling will occur between the key fob and the console active antenna when the Start mode or ACC/OFF mode button is pressed. This will allow the vehicle to be operated in a normal fashion.