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Home >> Ford >> 2005 >> Freestar Base >> Repair and Diagnosis (Single Page) >> Brakes >> Traction Control >> Anti-Lock Brake System >> Diagnosis And Testing >> Anti-Lock Control >> Pinpoint Tests >> Pinpoint Test A: No Communication With the anti-lock brake system (ABS) Module >> Pinpoint Test A: No Communication With The Anti-Lock Brake System (Abs) Module

Pinpoint Test A: No Communication With The Anti-Lock Brake System (Abs) Module

  1. A1 CHECK CIRCUITS 601 (LB/PK) AND 483 (RD) FOR AN OPEN 
    • Key in OFF position.
    • Disconnect: ABS Module C155.
    • Key in ON position.
    • Measure the voltage between the ABS module C155-32, circuit 601 (LB/PK), harness side and ground; and between the ABS module C155-2, circuit 483 (RD), harness side and ground.
      • Fig 1: Measuring Voltage Between ABS Module C155-32 And Ground
      G04000654Courtesy of FORD MOTOR CO.
    • Are the voltages greater than 10 volts? 
    • YES  : GO to  A2.
    • NO  : REPAIR the circuit in question. REPEAT the self-test.
  2. A2 CHECK CIRCUIT 1205 (BK) FOR AN OPEN 
    • Key in OFF position.
    • Measure the resistance between the ABS module C155-16, circuit 1205 (BK), harness side and ground; and between the ABS module C155-45, circuit 1205 (BK), harness side and ground.
      • Fig 2: Checking Circuit 1205 (BK) For Open
      G04000655Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
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