I replaced the batteries in both fobs for my 2008 STS. I can unlock the car but when I get in to start it, it says no fobs detected. If I sit in the car pressing the lock button over and over eventually I...
NO FOBS DETECTED
Keyless Entry System Description and Operation
Key Fob Not Detected
When a transmitter authentication is requested, the console passive antenna broadcasts a challenge within the passenger compartment to the transmitter. If the response from the transmitter via radio frequency (RF) is a valid response, the RCDLR determines there is a transmitter within the vehicle. If no response is received, the RCDLR determines that no transmitter is in the vehicle, and NO FOB DETECTED will be displayed on the DIC.
Transmitter authentication occurs during any of the following situation:
• When the vehicle is off and the start button is pressed.
• When the vehicle is off and the brake pedal is pressed (vehicle must be awake)
• When the vehicle is running and any door is opened and then closed.
The first thing to do would be to check for DTC'S - diagnostic trouble code's
DTC B3119, B3120, B3121, B3122, or B3123 is not set.
Important: This condition may be caused by low vehicle battery voltage. If the battery is not sufficiently charged (above 10 volts), the system will have difficulties detecting the fob and the NO FOB DETECTED message will be displayed. Correct the low battery voltage condition to eliminate this condition.
Verify DTC B3119, B3120, B3121, B3122, or B3123 is not set.
? If any of the DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle.
With the vehicle locked, attempt to passively unlock and enter the vehicle by approaching the vehicle with a valid transmitter and pulling the exterior door handle. The door should unlock and open.
? If unable to enter the vehicle passively, refer to Keyless Entry System Inoperative.
Place the transmitter in the console active antenna pocket and attempt to start the vehicle. The vehicle should start.
? If the vehicle does not start, perform the Transmitter Programming procedure.
While placing the keyless entry transmitter in various locations within the vehicle interior, attempt to start the vehicle. The NO FOB DETECTED message should not be displayed on the DIC.
? If the message is displayed, inspect for any sources of RF interference such as cell phone chargers, power supplies, etc. that would interrupt transmitter and antenna communication. If inspection does not reveal any items causing RF interference, contact the customer and question the customer about the conditions or location where the NO FOB DETECTED condition occurs. Discuss any devices that are normally kept in the vehicle, such as a laptop or cell phone charger, which may have been removed when the vehicle was brought in for service. It may be necessary to explain to the customer how RF interference degrades the performance of the system.
Inspect the external RF antenna connection at the RCDLR. First, gently pull on the coax connector at the module. If the coax comes out, then it wasn't seated properly. Remove and carefully inspect the coax connection for bent blades or a bent center pin. Fix coax connection if necessary and re-seat connector until a "click" is heard. Gently pull on the coax connection to make sure it is seated properly.
Your best bet , dealer !
Jan 30, 2018 |
Cars & Trucks