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Home >> Ford >> 2021 >> Edge ST-Line, FWD >> Repair and Diagnosis (Single Page) >> Brakes >> Brakes Control Systems >> Abs Guided Routine - Pinpoint Tests G - ZA >> Pinpoint Tests R: Abs (Anti-Lock Brake System) Module Communication Concern With Advanced Driver Assistance System (ADAS) >> Possible Causes

Possible Causes

Fig 1: Anti-Lock Brake System-A (ABS-A) Module Connector - C135A
G13726318Courtesy of FORD MOTOR CO.

Harness Side

Fig 2: Anti-Lock Brake System-B (ABS-B) Module Connector - C135B
G13726319Courtesy of FORD MOTOR CO.

Harness Side

Fig 3: Image Processing Module A (IPMA) Connector - C9039
G13726320Courtesy of FORD MOTOR CO.

Harness Side

  1. R1: CHECK THE IPMA (IMAGE PROCESSING MODULE A) COMMUNICATION NETWORK 
    NOTE: The IPMA is also known as the Advanced Drive Assistance System (ADAS) module. 
    • Ignition ON.
    • Using a diagnostic scan tool, carry out the Network Test.

    Did the IPMA pass the Network Test? 

    Yes No
    Diagnose all IPMA  Diagnostic Trouble Codes (DTCS). REFER to Rear View Mirrors . If there are no IPMA Diagnostic Trouble Codes (DTCs), Go to  R2. Go to  R2.
  2. R2: RECHECK FOR THE ABS (ANTI-LOCK BRAKE SYSTEM) MODULE DTC (DIAGNOSTIC TROUBLE CODE)S 
    • Clear the ABS 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.
    • Carry out the ABS self-test.

    Are any of the DTCs listed in the DTC Fault Trigger Conditions Table retrieved again? 

    Yes No
    Go to  R3. The system is operating correctly at this time. The DTC may have been set due to high network traffic or an intermittent fault condition.
  3. R3: RETRIEVE THE IPMA (IMAGE PROCESSING MODULE A) DIAGNOSTIC TROUBLE CODES (DTCS) 
    NOTE: The IPMA is also known as the Advanced Drive Assistance System (ADAS) module. 
    • Ignition ON.
    • Using a diagnostic scan tool, carry out the IPMA module self-test.

    Are any IPMA Diagnostic Trouble Codes (DTCs) present? 

    Yes No
    DIAGNOSE the IPMA Diagnostic Trouble Codes (DTCs). REFER to Lane Keeping System . Go to  R4.
  4. R4: CHECK FOR OTHER CAUSES OF COMMUNICATION NETWORK CONCERN 
    NOTE: The IPMA is also known as the Advanced Drive Assistance System (ADAS) module.
    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 IPMA, CCM or 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 No
    Go to  R5. The system is operating correctly at this time. The concern may have been due to incorrect parts replacement procedures or incorrect module configuration.
  5. R5: CHECK FOR COMMUNICATION DTCS IN OTHER MODULES 
    • Ignition ON.
    • Using a diagnostic scan tool retrieve all Diagnostic Trouble Codes (DTCs).

    Is DTC U0104:xx, U0405:xx or U2107:xx present in one or more modules in addition to the Diagnostic Trouble Codes (DTCs) set in the ABS module? 

    Yes No
    Go to  R6 Go to  R7
  6. R6: CHECK FOR CORRECT CCM (CRUISE CONTROL MODULE) OPERATION 
    • Ignition OFF.
    • Disconnect IPMA C242A .
    • Disconnect IPMA C242B .
    • 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 IPMA C242A . Make sure it seats and latches correctly.
    • Connect IPMA C242B . Make sure it seats and latches correctly.
    • Connect ABS  module C135 . Make sure it seats and latches correctly.
    • Operate the system and determine if the concern is still present.

    Is the concern still present? 

    Yes No
    CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exist for this concern, DISCONTINUE this test and FOLLOW the TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new CCM.
    REFER to CRUISE CONTROL MODULE (CCM) .    		 The system is operating correctly at this time. The concern may have been caused bymodule connections. ADDRESS the root cause of any connector or pin issues. Refer to CONNECTOR REPAIR PROCEDURES .
  7. R7: CHECK FOR CORRECT ABS (ANTI-LOCK BRAKE SYSTEM) MODULE OPERATION 
    • 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.
    • Disconnect IPMA C242A .
    • Disconnect IMPA C242B .
    • Disconnect CCM C1897 .
    • 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 IPMA C242A . Make sure it seats and latches correctly.
    • Connect IPMA C242B . Make sure it seats and latches correctly.
    • Connect CCM C242B . Make sure it seats and latches correctly.
    • Connect ABS module C135 . Make sure it seats and latches correctly.
    • Operate the system and determine if the concern is still present.

    Is the concern still present? 

    Yes No
    CHECK OASIS for any applicable Techincal Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW the TSB instruction. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new EBB.
    Refer to ELECTRIC BRAKE BOOSTER (EBB) .    		 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. Refer to CONNECTOR REPAIR PROCEDURES .
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