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Home >> Ford >> 2022 >> Transit Connect Titanium, Gas/Ethanol >> Repair and Diagnosis >> External Pages >> Different car >> Section 496 (Abs Guided Routine) >> Pinpoint Tests >> Pinpoint Tests CR: Hydraulic Brake Booster Flow Switch Stuck On or Off >> Visual Inspection and Diagnostic Pre-checks

Visual Inspection and Diagnostic Pre-checks

WARNING: This page is about a different car, the 2020 Ford F-150. 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 cause damage to the connector.
  1. CR1: CHECK THE ABS MODULE DTCS 
    • Ignition ON, engine OFF.

      Carry out the ABS self-test.

    • Is DTC C1050:9E present? 
      Yes No
      Go to  CR2. If DTC C1050:9F is present, Go to  CR3.
      If DTC C1057:13 is present, Go to  CR3.
      For all other ABS module DTCs,
      No fault found.
      GO to the ABS Module DTC Chart.
      If the diagnostic scan tool cannot communicate with the ABS module,
      REFER to the Module Communications Network article.
      For all others,
      No fault found.
  2. CR2: CHECK THE FLOW SWITCH FOR A SHORT TO GROUND 
    • Ignition OFF.
    • Hydraulic Fluid Flow Switch connector disconnected.
    • HydroMax Relay connector disconnected.
  3. CR3: CHECK THE FLOW SWITCH CIRCUIT FOR AN OPEN 
    • Ignition OFF.
    • Hydraulic Fluid Flow Switch connector disconnected. If not previously disconnected.
    • HydroMax Relay connector disconnected. If not previously disconnected.
  4. CR4: CHECK THE FLOW SWITCH GROUND CIRCUIT FOR AN OPEN 
    • Measure the resistance between:
      (+) Hydraulic Fluid Flow Switch Connector, Harness Side (-)
      GND Ground
    • Is the resistance less than 3 ohms? 
      Yes No
      Go to  CR5. REPAIR the circuit.
  5. CR5: CHECK THE FLOW SWITCH CIRCUIT FOR A SHORT TO VOLTAGE 
  6. CR6: CHECK THE HYDROMAX UNIT AND FLOW SWITCH OPERATION 
    • Ignition OFF.
    • HydroMax Relay connector connected. Make sure the relay is fully seated.
  7. CR7: CHECK THE FLOW SWITCH CONTINUITY 
    • Remove the HydroMax flow switch.
    • Measure the resistance between:
      (+) Hydraulic Fluid Flow Switch Connector, Component Side (-) Hydraulic Fluid Flow Switch Connector, Component Side
      HRC GND
    • Is the resistance less than 3 ohms? 
      Yes No
      INSTALL a new HydroMax unit. REFER to the Power Brake Actuation article. INSTALL a new HydroMax flow switch.
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