Circuit/System Verification
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 (Passive) , Keyless Entry System Inoperative (Active) .
- 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 Remote Control Door Lock and Theft Deterrent Transmitter Programming (North America, except Canada) , Remote Control Door Lock and Theft Deterrent Transmitter Programming (Canada, Europe, Asia, Middle East) 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.