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Home >> Ford >> 2009 >> Flex Limited, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1124 (Anti-Lock Brake System) >> Diagnostic Tests >> Anti-Lock Control >> Pinpoint Tests >> Pinpoint Test H: DTCs C1140 and C1446 - Hydraulic Base Brake Failure and Brake Switch Circuit Failure >> Pinpoint Test H: DTC C1446 - Brake Pedal Switch Circuit Failure

Pinpoint Test H: DTC C1446 - Brake Pedal Switch Circuit Failure

WARNING: This page is about a different car, the 2007 Lincoln MKX and 2007 Ford Edge. However, it is still accessible from the selected car via links, so may be relevant.
  1. H1 CHECK THE BRAKE FLUID LEVEL 
    • Check the brake fluid level in the master cylinder.
    • Is the brake fluid at an acceptable level? 
    1. YES  : Go to  H2.
    2. NO  : REFER to BRAKE SYSTEM - GENERAL INFORMATION to continue diagnosis of the base brake system.
  2. H2 CHECK THE BRAKE FLUID LEVEL SWITCH ELECTRICAL CONNECTOR CONDITION 
    • Key in OFF position.
    • Disconnect: Brake Fluid Level Switch C124
    • Check for:
      • corrosion.
      • pushed-out pins.
      • spread terminals.
    • Is the brake fluid level switch electrical connector condition OK? 
    1. YES  : Go to  H3.
    2. NO  : REPAIR the connector/wire harness or INSTALL a new connector/wire harness as necessary. CLEAR the DTCs. CARRY OUT the self-test with the brake pedal not applied.
  3. H3 CHECK THE BRAKE FLUID LEVEL SWITCH 
    • Connect the diagnostic tool.
    • Key in ON position.
    • Using the scan tool, clear the ABS module DTCs.
      • NOTE: Since the brake fluid level switch electrical connector is disconnected, the red brake warning indicator will be illuminated.
    • Test drive the vehicle then retrieve and record any ABS module DTCs.
    • Did DTC C1140 or C1446 return? 
    1. YES  : Go to  H4.
    2. NO  : INSTALL a new brake fluid switch. CLEAR the DTCs. CARRY OUT the self-test with the brake pedal not applied.
  4. H4 CHECK THE BRAKE FLUID LEVEL SWITCH WIRE HARNESS CONDITION 
    • Key in OFF position.
    • Connect: Brake Fluid Level Switch C124
    • Key in ON position.
    • Attempt to recreate the DTC by flexing the brake fluid level switch wiring harness.
    • Did DTC C1140 or C1446 return? 
    1. YES  : REPAIR the wire harness as necessary. CLEAR the DTCs. CARRY OUT the self-test with the brake pedal not applied.
    2. NO  : Go to  H5.
  5. H5 MONITOR THE PCM BRAKE PEDAL POSITION PID 
    • Using the scan tool, monitor the PCM BOO PID, while pressing and releasing the brake pedal.
    • Does the PID agree with the brake pedal position? 
    1. YES  : Go to  H6.
    2. NO  : REFER to EXTERIOR LIGHTING to continue diagnosis of the stoplamp.
  6. H6 CHECK THE ABS MODULE ELECTRICAL CONNECTOR 
    • Disconnect: ABS C135
    • Check the ABS module connector for:
      • corrosion.
      • pushed-out pins.
      • spread terminals.
      • water intrusion/contamination.
    • Connect: ABS C135
    • Make sure the ABS connector 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 Anti-Lock Brake System (ABS) Module . CALIBRATE the ABS module. FOLLOW the scan tool directions for the calibration procedure. CLEAR the DTCs. CARRY OUT the self-test with the brake pedal not applied.
    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. CARRY OUT the self-test with the brake pedal not applied.
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