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Home >> Lincoln >> 2021 >> Navigator L Livery, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1031 (Abs Guided Routine - Pinpoint Tests Cp - ZA) >> Pinpoint Tests H: Hydraulic Pump Faults >> Visual Inspection and Diagnostic Pre-checks

Visual Inspection and Diagnostic Pre-checks

WARNING: This page is about a different car, the 2020 Lincoln Navigator. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Antilock Braking System (ABS) Module Connector - C135
G13435400Courtesy of FORD MOTOR CO.

Harness Side

Circuit Pin
GND (Ground) - GD130 14 (BLACK/YELLOW)
LOGICGND - GD130 46 (BLACK/YELLOW)
Motor B+ (Battery Voltage HCU Motor) - SBF04 1 (GREEN/RED)
Fig 2: Battery junction box-Overdrive Cancel (BJB-D) Module Connector - C1617D
G13435401Courtesy of FORD MOTOR CO.

Harness Side

Circuit Pin
Fig 3: Battery Junction Box-B (BJB-B) Module Connector - C1035B
G13435402Courtesy of FORD MOTOR CO.

Harness Side

Circuit Pin
  1. H1: CHECK THE VEHICLE BATTERY AND CHARGING SYSTEM 
    • Verify the vehicle battery and charging system are operating correctly. Refer to Inspection and Verification in the Charging System General Information, Diagnosis and Testing article.
    • Are the battery and charging system operating correctly? 
    Yes No
    Go to  H2. FOLLOW the diagnostic repair directions as instructed in the Charging System General Information, Diagnosis and Testing article.
  2. H2: VERIFY ALL WIRING CONNECTIONS 
    • Ignition OFF.
    • ABS Module connector disconnected. (C135)
    • BJB_D Module connector disconnected. (C1617D)
    • BJB_B Module connector disconnected. (C1035B)
    • HC-BJB_D connector disconnected.
    • 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
      • Using a suitable mating terminal, check each connector terminal for deformed or enlarged contacts by comparing the mating terminal's fit between each of the following pins:
      • C135-1
      • C135-14
      • C135-46
      • C1617D-1
    • Are the connectors free of terminal corrosion, pushed-out terminals and spread terminals? 
    Yes No
    Go to  H3. REPAIR the affected terminal. Refer to the Connector Repair Procedures wiring diagrams for schematic and connector information.
  3. H3: CHECK PUMP MOTOR OPERATION 
    • ABS Module connector connected. (C135) Make sure the connector seats and latches correctly.
    • BJB_B Module connector connected. (C1035B) Make sure the connector seats and latches correctly.
    • HC-BJB_D connector connected. Make sure the connection is clean, tight and not cross-threaded.
    • Ignition ON, engine OFF.
    • Access the ABS and control the PMP_MTR (MODE) PID.
    • Command the pump motor on and listen for the ABS pump motor to activate.
    • Does the ABS pump motor run for approximately 2 seconds when commanded on? 
    Yes No
    Go to  H4. Go to  H7.
  4. H4: CHECK FOR FAULT REPEATABILITY 
    • Ignition ON, engine OFF.
    • Clear the ABS DTCs.
    • Ignition OFF.
    • Ignition ON, engine OFF.
    • Test drive the vehicle at speeds greater than 20 km/h (12 mph).
    • Ignition OFF.
    • Ignition ON, engine OFF.

      Carry out the ABS self-test.

    • Are any of the DTCs listed in the Fault Trigger Conditions Table present? 
    Yes No
    Go to  H5. The condition causing the concern is not present at this time. DISCONNECT and INSPECT the ABS module electrical connector. CLEAN or REPAIR the connector as necessary. ADDRESS the root cause of any connector or pin issues.
  5. H5: CHECK THE ABS MODULE GROUND CIRCUIT FOR AN OPEN 
    NOTE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may cause damage to the connector.
    NOTE: This step puts a load on the ABS module voltage supply circuit. If there are corroded or loose connections, loading the circuit may help show the fault. A 9006 or 9007 headlamp bulb is an effective load.
    • Ignition OFF.
    • ABS Module connector disconnected. (C135)
    • Ignition ON, engine OFF.
    • Connect the load to a suitable, fused 12-volt power connection.
    • Connect the load to each circuit before taking the voltage measurement.
    • Measure the voltage between:
      (+) ABS Module (C135) Connector, Harness Side (-)
      GND - GD130 (BLACK/YELLOW) - Pin 14 Ground
      LOGICGND - GD130 (BLACK/YELLOW) - Pin 46 Ground
    • Measure the voltage between:
      (+) ABS_B Module Connector, Harness Side (-)
      PUMPGND Ground
    • Measure the voltage between:
      (+) ABS_A Module Connector, Component Side (-)
      LOGICGND Ground
    • Is the voltage drop less than 0.5 volt? 
  6. H6: VERIFY ABS MODULE GROUND CONNECTIONS 
    NOTE: Refer to the Grounds wiring diagrams for ground connection information.
    • Disconnect all ABS module ground joint connections. Refer to the Grounds wiring diagrams for ground information.
      • Discard the bolts.
      • Inspect the ground joint connections for:
      • Rust
      • Corrosion
      • Other foreign material
      • Cross-threaded fasteners
      • Clean or repair the ground joint connections as necessary.
      • Connect all ABS module ground joint connections. Make sure the connections are clean, tight and not cross threaded.
      • Install new bolts and tighten to 12 Nm (106 lb-in).
      • Measure the resistance between:
      • Each ground joint bolt.
      • The battery negative cable terminal.
    • Are the measured resistances less than 1 Ohm? 
    Yes No
    Go to  H7. CLEAN or REPAIR the ground joint connection.
    Go to  H7.
  7. H7: CHECK THE PUMP MOTOR VOLTAGE SUPPLY TO THE ABS MODULE 
    NOTE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may cause damage to the connector.
    NOTE: This step puts a load on the ABS module voltage supply circuit. If there are corroded or loose connections, loading the circuit may help show the fault. A 9006 or 9007 headlamp bulb is an effective load.
    NOTE: VERIFY BJB fuse 108 (60A) is OK. If not OK, REFER to the OEM Electrical Wiring Diagrams Introduction article identify the possible causes of the circuit short.
    • Ignition ON, engine OFF.
    • Measure the voltage between:
      (+) Vehicle Battery (-) Vehicle Battery
      Positive terminal Negative terminal
    • Record the measured battery voltage.
    • Connect the load to a suitable ground connection.
    • Connect the load to each circuit before taking the voltage measurement.
    • Measure the voltage between:
      (+) ABS Module (C135) Connector, Harness Side (-)
      Motor B+ - SBF04 (GREEN/RED) - Pin 1 Ground
    • Measure the voltage between:
      (+) ABS_B Module Connector, Harness Side (-)
      PUMPPWR Ground
    • Measure the voltage between:
      (+) ABS_A Module Connector, Component Side (-)
      VLVPWR Ground
    • Is each voltage within 0.5 volt of the recorded battery voltage? 
    Yes No
    Go to  H8. REPAIR the circuit.
  8. H8: VERIFY ALL WIRING CONNECTIONS 
    • 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
    • Are the connectors free of corrosion, damaged pins, bent pins, pushed-out pins and spread terminals? 
  9. H9: CHECK FOR APPLICABLE SERVICE ARTICLES 
    • Check OASIS for any service articles: TSB, GSB, SSM or FSA.
    • Do any applicable service articles exist? 
  10. H10: CHECK FOR CORRECT ABS MODULE AND HCU OPERATION 
    • ABS Module connector connected. (C135) Make sure the connector seats and latches correctly.
    • Operate the system and determine if the concern is still present.
    • Is the concern still present? 
    Yes No
    INSTALL a new HCU.
    INSTALL a new HCU and ABS module assembly.
    REFER to the Anti-Lock Brake System (ABS) and Stability Control article.
    ORDER a replacement HCU and ABS module assembly and INCLUDE the RVC on the form.
    If this is a Ford paid repair, INCLUDE the RVC on the warranty claim form.    		 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. H11: CHECK FOR CORRECT ABS OPERATION 
    • ABS_A Module connector connected. Make sure the connector seats and latches correctly.
    • ABS_B Module connector connected. Make sure the connector seats and latches correctly.
    • Operate the system and determine if the concern is still present.
    • Is the concern still present? 
    Yes No
    INSTALL a new EBB assembly.
    The HCU and ABS module are a single assembly known as the EBB unit.
    INSTALL a new EBB unit (HCU and ABS module assembly). REFER to the Anti-Lock Brake System (ABS) and Stability Control article.
    ORDER a replacement EBB unit and INCLUDE the RVC on the form.
    If this is a Ford paid repair, INCLUDE the RVC on the warranty claim form.    		 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.
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