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Home >> Ford >> 2006 >> Focus ZX5 SE, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 1419 (Handles, Locks, Latches And Entry Systems) >> Diagnostic Tests >> Locks, Latches and Entry Systems >> Pinpoint Tests >> Pinpoint Test I: The Remote Keyless Entry (RKE) Transmitter Is Inoperative

Pinpoint Test I: The Remote Keyless Entry (RKE) Transmitter Is Inoperative

WARNING: This page is about a different car, the 2010 Lincoln Town Car. However, it is still accessible from the selected car via links, so may be relevant.

Normal Operation 

Remote locking and unlocking of the doors, releasing the luggage compartment lid, and activation of the panic alarm is accomplished by the driver door module (DDM) receiving a command message from the remote keyless entry (RKE) transmitter. The DDM processes the command and energizes the appropriate relays to lock or unlock the doors, open/close the luggage compartment lid, or sends a message over the standard corporate protocol (SCP) network to the lighting control module (LCM) to activate the parking lamps and horn for the panic alarm.

The RKE transmitters and DDM also utilize a rolling code to prevent the code from being "captured" by a code grabber. The system advances the counter in the RKE transmitter and DDM every time an RKE transmitter button is pressed.

DTC Description Fault Trigger Conditions
B1148 - Radio Frequency Power Output Circuit Short to Ground A continuous DTC that sets when the DDM detects the radio frequency power output circuit is shorted to ground.
B1149 - Radio Frequency Enable Output Circuit Short to Battery A continuous DTC that sets when the DDM detects the radio frequency enable output circuit is shorted to voltage.
B1150 - Radio Frequency Enable Output Circuit Short to Ground A continuous DTC that sets when the DDM detects the radio frequency enable output circuit is shorted to ground.
B1151 - Radio Frequency AM/FM Signal Key Select Output Circuit Short to Ground A continuous DTC that sets when the DDM detects the radio frequency AM/FM signal key select output circuit is shorted to ground.
B1152 - Radio Frequency AM/FM Signal Key Select Output Circuit Short to Battery A continuous DTC that sets when the DDM detects the radio frequency AM/FM signal key select output circuit is shorted to voltage.
B2425 - Remote Keyless Entry Out of Synchronization A continuous DTC that sets when the DDM detects the rolling counter received from an RKE transmitter is 1,024 times greater than the rolling counter stored in the module.

This pinpoint test is intended to diagnose the following:

PINPOINT TEST I: THE REMOTE KEYLESS ENTRY (RKE) TRANSMITTER IS INOPERATIVE 

NOTE: Aftermarket or dealer-installed systems may adversely affect the RKE system operation. These systems should be disconnected before diagnosing any RKE concerns.
  1. I1 CHECK FOR THE CORRECT RKE TRANSMITTERS 
      NOTE: Make sure the RKE transmitters are those provided with the original equipment manufacturer (OEM) system and not from an aftermarket system, or a dealer-installed system that may have been installed on the vehicle.
    • Check that the correct RKE transmitters are used with the vehicle.
    • Are all the correct RKE transmitters present? 
    1. YES  : Go to  I2.
    2. NO  : The system cannot be tested without the correct RKE transmitters. INFORM the customer that all the correct RKE transmitters must be present to proceed with diagnosis of the system.
  2. I2 CHECK THE FUNCTIONALITY OF ALL RKE TRANSMITTERS 
    • Press each button on all the transmitters.
    • Does any button operate correctly? 
    1. YES  : Go to Pinpoint Test J  .
    2. NO  : Go to  I3.
  3. I3 RETRIEVE THE RECORDED DDM DTCs FROM THE SELF-TEST 
    • Check the recorded results from the DDM self-test.
    • Are continuous DTCs B1148, B1149, B1150, B1151, B1152, or B2425 present? 
    1. YES  : For DTC B2425, go to  I4.

      For DTCs B1148, B1149, B1150, B1151, or B1152, go to  I12.

    2. NO  : Go to  I8.
  4. I4 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 transmitter is now synchronized. CLEAR the DTCs. REPEAT the self-test.
    2. NO  : Go to  I5.
  5. I5 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  I6.
    2. NO  : Go to  I7.
  6. I6 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 RKE transmitter is now synchronized. CLEAR the DTCs. REPEAT the self-test.
    2. NO  : Go to  I7.
  7. I7 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(s) operate now? 
    1. YES  : The transmitter(s) is now synchronized. INFORM the customer that any RKE transmitters not present need to be programmed. CLEAR the DTCs. REPEAT the self-test.
    2. NO  : Go to  I8.
  8. I8 MAKE SURE THE RKE TRANSMITTER SIGNAL IS BEING RECEIVED 
    • Enter the following diagnostic mode on the diagnostic tool: Remote Keyless Entry
      • NOTE: The remote keyless entry test is accessed through the scan tool by selecting Toolbox, Body, Security.
    • Monitor the RKE transmitter identification code (TIC) through the scan tool menus.
    • Verify the RKE transmitter signal is being received. Press a button on the RKE transmitter while observing the scan tool.
    • Does the TIC show up on the scan tool screen when a button is pressed? 
    1. YES  : Go to  I9.
    2. NO  : Go to  I10.
  9. I9 CHECK IF THE RKE TRANSMITTERS ARE PROGRAMMED 
    • Enter the following diagnostic mode on the diagnostic tool: Remote Keyless Entry
    • Monitor the RKE transmitter TIC/DATA through the scan tool menus.
    • Verify the RKE transmitters are programmed to the vehicle.
    • Does the TIC displayed under RKE transmitter match any of the TICs stored in memory? 
    1. YES  : Go to  I20.
    2. NO  : PROGRAM all of the RKE transmitters. REFER to Remote Keyless Entry Transmitter Programming . INFORM the customer that any RKE transmitters not present need to be programmed. TEST the system for normal operation.
  10. I10 CHECK FOR NORMAL OPERATION WITH A KNOWN GOOD RKE TRANSMITTER 
    • Enter the following diagnostic mode on the diagnostic tool: Remote Keyless Entry
    • Monitor the RKE transmitter TIC/DATA through the scan tool menus.
    • Using the customer's second RKE transmitter or a known good RKE transmitter that is correct for the vehicle (and programmed to the vehicle), verify the RKE transmitter signal is being received.
    • Does the TIC show up on the scan tool when a button is pressed on the RKE transmitter? 
    1. YES  : Go to  I11.
    2. NO  : Go to  I12.
  11. I11 CHECK THE INOPERATIVE RKE TRANSMITTER BATTERY 
    • Using a thin coin, open the inoperative RKE transmitter.
    • Do not clean off any grease from the battery terminals on the back surface of the circuit board.
    • Verify the correct battery is used (CR2032).
    • Remove the RKE transmitter battery and measure the voltage.
    • Is the voltage greater than 2.5 volts? 
    1. YES  : REPLACE the inoperative RKE transmitter. PROGRAM all RKE transmitters. REFER to Remote Keyless Entry Transmitter Programming . INFORM the customer that any RKE transmitters not present need to be programmed. TEST the system for normal operation.
    2. NO  : INSTALL a new battery. DO NOT reprogram the RKE transmitters (weak or dead batteries do not erase TICs from memory). TEST the system for normal operation.
  12. I12 CHECK CIRCUIT 2308 (RD/WH) FOR VOLTAGE 
    • Disconnect: TPMS/RKE Antenna C4321
    • Key in ON position.
      • Fig 1: Measuring Voltage
      GF0047535Courtesy of FORD MOTOR CO.
    • Measure the voltage between the TPMS/RKE antenna C4321-4, circuit 2308 (RD/WH), harness side and the TPMS/RKE antenna C4321-3, circuit 2307 (BK/WH), harness side.
    • Is the voltage greater than 10 volts? 
    1. YES  : Go to  I16.
    2. NO  : Go to  I13.
  13. I13 CHECK CIRCUIT 2308 (RD/WH) FOR AN OPEN OR SHORT TO GROUND 
    • Key in OFF position.
    • Disconnect: DDM C501c
      • Fig 2: Checking Circuit For An Open Or Short To Ground
      GF0018634Courtesy of FORD MOTOR CO.
    • Measure the resistance between the TPMS/RKE antenna C4321-4, circuit 2308 (RD/WH), harness side and the DDM C501c-4, circuit 2308 (RD/WH), harness side; and between the TPMS/RKE antenna C4321-4, circuit 2308 (RD/WH), harness side and ground.
    • Is the resistance less than 5 ohms between the TPMS/RKE antenna and the DDM, and greater than 10,000 ohms between the TPMS/RKE antenna and ground? 
    1. YES  : Go to  I14.
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
  14. I14 CHECK CIRCUIT 2307 (BK/WH) FOR A SHORT TO VOLTAGE 
    • Key in ON position.
      • Fig 3: Checking Circuit For Short To Voltage
      GF0013249Courtesy of FORD MOTOR CO.
    • Measure the voltage between the TPMS/RKE antenna C4321-3, circuit 2307 (BK/WH), harness side and ground.
    • Is any voltage present? 
    1. YES  : REPAIR the circuit. TEST the system for normal operation.
    2. NO  : Go to  I15.
  15. I15 CHECK CIRCUIT 2307 (BK/WH) FOR AN OPEN 
      Fig 4: Checking Circuit For Open
      GF0013250Courtesy of FORD MOTOR CO.
    • Measure the resistance between the TPMS/RKE antenna C4321-3, circuit 2307 (BK/WH), harness side and the DDM C501c-3, circuit 2307 (BK/WH), harness side.
    • Is the resistance less than 5 ohms? 
    1. YES  : Go to  I20.
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
  16. I16 CHECK CIRCUITS 2305 (PK/LB), 2306 (GY/RD) AND 2309 (LB/BK) FOR A SHORT TO VOLTAGE 
    • Key in OFF position.
    • Disconnect: DDM C501c
    • Key in ON position.
    • Measure the voltage between the TPMS/RKE antenna connector, harness side and ground as follows.
      Connector-Pin Circuit
      C4321-1 2305 (PK/LB)
      C4321-2 2306 (GY/RD)
      C4321-5 2309 (LB/BK)
    • Is any voltage present? 
    1. YES  : REPAIR the circuit in question. TEST the system for normal operation.
    2. NO  : Go to  I17.
  17. I17 CHECK CIRCUITS 2305 (PK/LB), 2306 (GY/RD) AND 2309 (LB/BK) FOR AN OPEN 
    • Measure the resistance between the TPMS/RKE antenna connector, harness side and the DDM connector, harness side as follows.
      TPMS/RKE Antenna Connector-Pin DDM Connector-Pin Circuit
      C4321-1 C501c-1 2305 (PK/LB)
      C4321-2 C501c-2 2306 (GY/RD)
      C4321-5 C501c-5 2309 (LB/BK)
    • Are the resistances less than 5 ohms? 
    1. YES  : Go to  I18.
    2. NO  : REPAIR the circuit in question. TEST the system for normal operation.
  18. I18 CHECK CIRCUITS 2305 (PK/LB), 2306 (GY/RD) AND 2309 (LB/BK) FOR A SHORT TO GROUND 
    • Measure the resistance between the TPMS/RKE antenna connector and ground as follows.
      Connector-Pin Circuit
      C4321-1 2305 (PK/LB)
      C4321-2 2306 (GY/RD)
      C4321-5 2309 (LB/BK)
    • Are the resistances greater than 10,000 ohms? 
    1. YES  : Go to  I19.
    2. NO  : REPAIR the circuit in question. TEST the system for normal operation.
  19. I19 TEST THE SYSTEM WITH A KNOWN GOOD TPMS/RKE ANTENNA 
    • Key in OFF position.
    • Install a known good TPMS/RKE antenna.
    • Key in ON position.
    • Test the system for normal operation.
    • Does the system operate correctly? 
    1. YES  : The system is OK. INSTALL a new TPMS/RKE antenna. REFER to Antenna .
    2. NO  : REMOVE the known good antenna. Go to  I20.
  20. I20 CHECK FOR CORRECT DDM OPERATION 
    • Disconnect all the DDM connectors.
    • Check for:
      • corrosion
      • damaged pins
      • pushed-out pins
    • Connect all the DDM connectors and make sure they seat correctly.
    • Operate the system and verify the concern is still present.
    • Is the concern still present? 
    1. YES  : INSTALL a new DDM. REFER to MULTIFUNCTION ELECTRONIC MODULES article. TEST the system for normal operation.
    2. NO  : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
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