LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Ford >> 2023 >> F-150 Lightning Pro >> Repair and Diagnosis >> Brakes >> Traction Control >> Anti-Lock Brake System (Abs) And Stability Control >> Diagnosis And Testing >> Anti-Lock Brake System (ABS) and Stability Control - Electric >> Pinpoint Tests >> Pinpoint Test C: Abs (Anti-Lock Brake System) Module Communication Concern With RFA (Remote Function Actuator) - BLUETOOTH Low Energy Module
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Pinpoint Test C: Abs (Anti-Lock Brake System) Module Communication Concern With RFA (Remote Function Actuator) - BLUETOOTH Low Energy Module

  1. Refer to Module Communications Network for schematic and connector information.

    Normal Operation and Fault Conditions 

    With the ignition ON, the RFA sends messages to the GWM over the HS-CAN1. The GWM relays these messages to the ABS module over the FD-CAN. If the ABS module does not receive these messages within the specified time frame, the ABS module sets Diagnostic Trouble Codes (DTCs). This can be due to a RFA failure, a circuit failure on the CAN or an excessive load on the network. For information on the messages sent to the ABS module by the RFA, REFER to: Anti-Lock Brake System (ABS) and Stability Control - System Operation and Component Description .

    DTC Fault Trigger Conditions 

    DTC Description Fault Trigger Condition
    ABS B15A5:86 Bluetooth Low Energy Module (BLEM): Signal Invalid Sets if the remote park assist request message from the RFA contains invalid or faulty data.
    ABS B15A5:87 Bluetooth Low Energy Module (BLEM): Missing Message Sets if the PCM RFA messages are missing.

    Possible Sources 

    • Wiring, terminals or connectors
    • Network communication concern
    • RFA
    • ABS

  2. C1 CHECK THE RFA COMMUNICATION

    • Ignition ON.

    • Using a diagnostic scan tool, carry out the Network Test.

    Does the RFA pass the Network Test? 

    Yes  RETRIEVE and RECORD all RFA Diagnostic Trouble Codes (DTCs).
    No  GO to  C2

  3. C2 CHECK THE GWM COMMUNICATION

    • Review the results of the modules communicating on the network from the previous step.

    Does the GWM pass the Network Test? 

    Yes  DIAGNOSE the RFA module does not communicate with the diagnostic scan tool. REFER to: Controller Area Network (CAN) Module Communications Network - Electric .
    No  DIAGNOSE the GWM does not communicate with the diagnostic scan tool. REFER to: Controller Area Network (CAN) Module Communications Network - Electric .

  4. C3 RECHECK THE ABS MODULE FOR THE LOST COMMUNICATION DTC

    • Using a diagnostic scan tool, clear the ABS module Diagnostic Trouble Codes (DTCs).

    • Put the ABS module in sleep mode by performing the following steps:

      • With ALL doors closed, set the ignition from ON to OFF.
      • Disconnect the diagnostic scan tool.
      • Open the door, exit the vehicle and close the door.
      • Wait a minimum of 90 seconds for the ABS module to enter sleep mode.

    • Ignition ON.

    • NOTE: When retrieving Diagnostic Trouble Codes (DTCs), ignore all historical or continuous memory Diagnostic Trouble Codes (DTCs).

      Using a diagnostic scan tool, carry out the ABS module self-test.

    Are any of the Diagnostic Trouble Codes (DTCS) listed in the DTC Fault Trigger Conditions table present and active in the ABS module? 

    Yes  GO to  C4
    No  The system is operating correctly at this time. The DTC may have been set due to high network traffic or an intermittent fault condition.

  5. C4 REVIEW THE ABS MODULE SELF-TEST FOR VOLTAGE-RELATED DIAGNOSTIC TROUBLE CODES (DTCS)

    • Review the results from the ABS module self-test.

    Is DTC U3003:16 or U3003:17 present? 

    Yes  For DTC U3003:16, GO to Pinpoint Test A  For DTC U3003:17, GO to Pinpoint Test F 
    No  GO to  C5

  6. C5 CHECK FOR GWM DIAGNOSTIC TROUBLE CODES (DTCS)

    • Using a diagnostic scan tool, carry out the GWM self-test.

    Are any Diagnostic Trouble Codes (DTCS) present? 

    Yes  DIAGNOSE the RFA Diagnostic Trouble Codes (DTCS). REFER to: Passive Anti-Theft System (PATS) .
    No  GO to  C6

  7. C6 CHECK FOR RFA DIAGNOSTIC TROUBLE CODES (DTCS)

    • Using a diagnostic scan tool, carry out the RFA module self-test.

    Are any Diagnostic Trouble Codes (DTCS) present? 

    Yes  DIAGNOSE the RFA module Diagnostic Trouble Codes (DTCS). REFER to: Passive Anti-Theft System (PATS) .
    No  GO to  C7

  8. C7 CHECK FOR OTHER CAUSES OF COMMUNICATION NETWORK CONCERN

    NOTE: If new modules were installed prior to the DTC being set, the module configuration can be incorrectly set during the PMI or the PMI may not have been carried out.

    • Check the vehicle service history for recent service actions related to the RFA or the ABS module. If recent service history is found:

      • Verify the correct replacement module was installed. HVBOM may be used to verify correct part fitment.
      • Verify the configuration of replacement module was correct. Re-configure the module using as-built data if prior configuration is suspect.
      • Verify the module was not obtained from a like vehicle and installed into customer vehicle. Return the swapped module to source vehicle and obtain new replacement module.

    • Operate the system and determine if the observable symptom is still present.

    Is the observable symptom still present? 

    Yes  GO to  C8
    No  The system is operating correctly at this time. The concern may have been due to incorrect parts replacement procedures or incorrect module configuration.

  9. C8 CHECK FOR COMMUNICATION DIAGNOSTIC TROUBLE CODES (DTCS) IN OTHER MODULES

    • Ignition ON.

    • Using a diagnostic scan tool, carry out the Network Test to retrieve Diagnostic Trouble Codes (DTCs) from all modules.

    Is any DTC from the Fault Trigger Conditions Table set in 1 or more modules in addition to the ABS module? 

    Yes  GO to  C9
    No  GO to  C10

  10. C9 VERIFY RFA MODULE OPERATION

    • Ignition OFF.

    • Disconnect RFA module C9026.

    • Disconnect ABS module C135.

    • Using a good light source, inspect all disconnected electrical connectors for the following:

      • corrosion - install new connector or terminal and clean the module pins
      • damaged or bent pins - install new terminals or pins
      • pushed-out pins - install new pins as necessary
      • spread terminals - install new terminals as necessary

    • Connect RFA module C9026. Make sure the connector seats and latches correctly.

    • Connect GWM C2431C. Make sure the connector seats and latches correctly.

    • Connect ABS module C135. Make sure the connector seats and latches correctly.

    • Operate the system and verify the concern is still present.

    Is the concern still present? 

    Yes  CHECK OASIS for any service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new RFA module. REFER to: Remote Function Actuator (RFA) Module .
    No  The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

  11. C10 VERIFY ABS MODULE OPERATION

    • Ignition OFF.

    • Disconnect RFA module C9026.

    • Disconnect ABS module C135.

    • Using a good light source, inspect all disconnected electrical connectors for the following:

      • corrosion - install new connector or terminal and clean the module pins
      • damaged or bent pins - install new terminals or pins
      • pushed-out pins - install new pins as necessary
      • spread terminals - install new terminals as necessary

    • Connect RFA module C9026. Make sure the connector seats and latches correctly.

    • Connect GWM C2431C. Make sure the connector seats and latches correctly.

    • Connect ABS module C135. Make sure the connector seats and latches correctly.

    • Operate the system and verify the concern is still present.

    Is the concern still present? 

    Yes  CHECK OASIS for any service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new EBB unit. REFER to: Electric Brake Booster (EBB) .
    No  The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.
scientia non olet · About LEMON Manuals