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Pinpoint Test C: The Abs Module Does Not Respond To The Scan Tool

WARNING: This page is about a different car, the 2009 Mercury Mountaineer, 2009 Ford Explorer Sport Trac, and 2009 Ford Explorer. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
  1. C1 CHECK THE ABS VOLTAGE SUPPLY CIRCUITS FOR AN OPEN 
    • Key in OFF position.
    • Disconnect: ABS Module C155
    • Key in ON position.
    • Measure the voltage between the ABS module, harness side and ground as follows:
      Connector-Pin Circuit
      C155-1 SBB06 (BN/RD)
      C155-8 CBP18 (GY/OG)
      C155-32 SBB33 (RD)
    • Are the voltages greater than 10 volts? 
    1. YES  : Go to  C2.
    2. NO  : VERIFY the battery junction box (BJB) fuse 6 (40A) or fuse 33 (30A) and the smart junction box (SJB) fuse 18 (10A) is OK. If OK, REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
  2. C2 CHECK THE ABS GROUND CIRCUIT FOR AN OPEN 
    • Key in OFF position.
    • Measure the resistance between the ABS module C155-16, circuit GD120 (BK/GN) harness side and ground.
      • Fig 1: Checking Circuit For Open
      GF0026039Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    1. YES  : Go to  C3.
    2. NO  : REPAIR the circuit. CLEAR the DTCs. REPEAT the network test with the scan tool.
  3. C3 CHECK THE HS-CAN CIRCUITS BETWEEN THE DATA LINK CONNECTOR (DLC) AND THE ABS MODULE FOR AN OPEN 
    • Measure the resistance between the ABS module C135-12, circuit VDB04 (WH/BU), harness side and the DLC C251-6, circuit VDB04 (WH/BU), harness side.
      • Fig 2: Measuring Resistance Between ABS Module C135-12, Circuit VDB04 (WH/BU) & DLC C251-6
      GF0028102Courtesy of FORD MOTOR CO.
    • Measure the resistance between the ABS module C135-13, circuit VDB05 (WH), harness side and the DLC C251-14, circuit VDB05 (WH), harness side.
      • Fig 3: Measuring Resistance Between ABS Module C135-13, Circuit VDB05 (WH) & DLC C251-14
      GF0028103Courtesy of FORD MOTOR CO.
    • Are the resistances less than 5 ohms? 
    1. YES  : Go to  C4.
    2. NO  : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
  4. C4 CHECK FOR CORRECT ABS MODULE OPERATION 
    • Disconnect the ABS module connector.
    • Check for:
      • corrosion
      • damaged pins
      • pushed-out pins
    • Connect the ABS module connector and make sure it seats correctly.
    • Operate the system and verify the concern is still present.
    • Is the concern still present? 
    1. YES  : INSTALL a new ABS module. REFER to VEHICLE DYNAMIC SYSTEMS article. CLEAR the DTCs. REPEAT the network test with the scan tool.
    2. NO  : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the network test with the scan tool.
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