Circuit/System Verification

Note: Verify the correct replacement part number.

1. Ignition - On/Vehicle - In Service Mode
2. Verify that no DTCs are set.
   • B3119
   • B3120
   • B3121
   • B3122
   • B3123
   • B3124
   • If the DTC is set 

     Refer to: Diagnostic Trouble Code (DTC) List - Vehicle

   • Go to next step: If no DTC is set 
3. Keyless Entry Transmitter - All Doors Lock
4. Exterior Driver Door Handle Switch/Exterior Passenger Door Handle Switch/- Open
   • If none of the components work properly 

     Refer to: Keyless Entry System Malfunction 

   • Go to next step: If all components operate 
5. Engine - Crank
6. Verify the function: Engine = Running
   • If the engine does not start 

     Refer to: Remote Control Door Lock and Theft Deterrent Transmitter Programming 

   • Go to next step: If the engine starts 
7. A message and/or warning indicator may be displayed to the driver. = No Transponder Detected
   • Displays = No Transponder Detected 

     Refer to: Circuit/System Testing

   • Go to next step: Not Displayed = No Transponder Detected 
8. Many instances of "No Transponder Detected" conditions are related to external environmental influences, in most cases some form of radio frequency interference. If that is suspected, question the customer about the conditions or locations where the condition occurs.If the condition is caused by external influences, the system operates as designed and there is no actual fault that could be diagnosed with this procedure.External environmental influences may include:
   • Flat screen televisions
   • Darkness sensing exterior lights
   • Cell phones and cell phone chargers
   • Power inverters
   • Gas stations with pay-at-the-pump radio frequency transponders
   • Any area with high radio frequency traffic. For example airports, police stations and fire stations.