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HOMESERVICE MANUALSMERCURY2009MOUNTAINEER 4.6 8, RWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 118 (HANDLES, LOCKS, LATCHES & ENTRY SYSTEMS)DIAGNOSTIC TESTSLOCKS, LATCHES & ENTRY SYSTEMSPINPOINT TESTSPINPOINT TEST M: THE REMOTE KEYLESS ENTRY (RKE) TRANSMITTER IS OUT OF SYNCHRONIZATION
2009 Mercury Mountaineer 4.6 8, RWD

Pinpoint Test M: The Remote Keyless Entry (RKE) Transmitter Is Out Of Synchronization

2009 Mercury Mountaineer 4.6 8, RWDSECTION Pinpoint Test M: The Remote Keyless Entry (RKE) Transmitter Is Out Of Synchronization
WARNING: This page is about a different car, the 2009 Mercury Grand Marquis and 2009 Ford Crown Victoria. However, it is still accessible from the selected car via links, so may be relevant.

Normal Operation 

The RKE transmitter and the driver door module (DDM) use a rolling code to prevent the codes from being captured by a code grabber. The system advances the counter in the RKE transmitter and in the DDM every time a RKE transmitter button is pressed.

DTC B2425 (Remote Keyless Entry Out of Synchronization) - is a continuous DTC that sets when the DDM detects that the rolling codes are out of synch.

This pinpoint test is intended to diagnose the following:

  • RKE transmitter button pressed a substantial amount of times outside the range of the vehicle
  • RKE transmitter

PINPOINT TEST M: THE REMOTE KEYLESS ENTRY (RKE) TRANSMITTER IS OUT OF SYNCHRONIZATION 

NOTE: All RKE transmitters must be present to begin diagnosis of the RKE system.
  1. M1 RESYNCHRONIZE THE INOPERATIVE RKE TRANSMITTER 
    • Key in OFF position.
    • Press any button on the inoperative RKE transmitter 4 times consecutively within 30 seconds.
    • Does the RKE transmitter operate correctly now? 
    1. YES  : The system is OK. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
    2. NO  : Go to  M2.
  2. M2 CHECK FOR A SECOND RKE TRANSMITTER 
    • Check for another RKE transmitter that operates with the vehicle.
    • Is there another RKE transmitter that operates with the vehicle? 
    1. YES  : Go to  M3.
    2. NO  : Go to  M4.
  3. M3 RESYNCHRONIZE THE INOPERATIVE RKE TRANSMITTER USING THE SECOND RKE TRANSMITTER 
    • Press any button on the operational RKE transmitter.
    • Within 30 seconds, press a button on the inoperative RKE transmitter.
    • Check the inoperative RKE transmitter for correct operation.
    • Does the inoperative RKE transmitter operate now? 
    1. YES  : The system is OK. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
    2. NO  : Go to  M4.
  4. M4 PROGRAM THE INOPERATIVE RKE TRANSMITTER OR ALL THE RKE TRANSMITTERS 
    • Program the inoperative RKE transmitter individually using a scan tool or program all RKE transmitters using the manual key cycle method. Refer to Remote Keyless Entry Transmitter Programming .
    • Does the inoperative RKE transmitter operate now? 
    1. YES  : The system is OK. INFORM the customer that any RKE transmitters not present need to be programmed. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
    2. NO  : Go to Pinpoint Test F .
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