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Home >> Ford >> 2000 >> Contour SE, 2.0 3, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 2661 (Anti-Lock Brake System - Vehicle Dynamic Systems) >> Diagnosis And Testing >> Anti-Lock Control - Non-Hybrid >> Pinpoint Tests >> Pinpoint Test K: DTCs C109D, C109E and C109F >> PINPOINT TEST K: DTCs C109D, C109E AND C109F

PINPOINT TEST K: DTCs C109D, C109E AND C109F

WARNING: This page is about a different car, the 2011 Mercury Milan, 2011 Lincoln MKZ, and 2011 Ford Fusion. 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. K1 CHECK THE ABS MODULE DTCs 
    • Review the DTCs recorded during Inspection and Verification.
    • Was DTC C109D the only recorded DTC? 
    • Yes  : GO to K2.
    • No  : If DTC C109E and/or C109F was retrieved, GO to  K6. For all other DTCs, REFER to the ABS MODULE DTC TABLE  in this service information.
  2. K2 CHECK DTC RETURNABILITY 
    • Using the scan tool, clear the ABS module DTCs.
    • Ignition OFF.
    • Disconnect the scan tool.
    • Start the engine.
      • NOTE: It may take up to 3 minutes for DTC C109D to set.
    • Allow the vehicle to idle for a minimum of 4 minutes.
    • Ignition OFF.
    • Connect the scan tool.
    • Ignition ON.
    • Enter the following diagnostic mode on the scan tool: Self Test - ABS Module.
    • Is DTC C109D the only vacuum sensor DTC present? 
    • Yes  : GO to K3.
    • No  : If DTC C109E and/or C109F was retrieved, GO to  K6. For all other DTCs, REFER to the ABS MODULE DTC TABLE  in this service information.
  3. K3 CHECK THE ENGINE VACUUM 
    • Carry out the Intake Manifold Vacuum Test, refer to Diagnosis and Testing in ENGINE SYSTEM - GENERAL INFORMATION article.
    • Record the vacuum reading.
    • Does the vacuum gauge indicate normal vacuum? 
  4. K4 CHECK THE BRAKE BOOSTER 
    • Carry out the Brake Booster Component Test, refer to Diagnosis and Testing in BRAKE SYSTEM - GENERAL INFORMATION article.
    • Do the brake booster and check valve pass the component test? 
    • Yes  : GO to K5.
    • No  : REPAIR or INSTALL new as necessary. CLEAR the DTC. REPEAT the self-test.
  5. K5 CHECK THE BRAKE BOOSTER VACUUM LEVEL PID 
    • Connect the scan tool.
    • Start the engine.
    • Enter the following diagnostic mode on the scan tool: DataLogger - ABS Module.
    • Compare the recorded vacuum reading to the brake booster vacuum level PID.
    • Does the PID match the recorded vacuum reading? 
  6. K6 CHECK THE BRAKE BOOSTER VACUUM SENSOR 
    • Inspect the vacuum sensor ambient air pressure inlet ports.
    • Are all 4 ports free of contamination and/or foreign material? 
  7. K7 CHECK THE BRAKE BOOSTER VACUUM SENSOR CIRCUITS FOR A SHORT TO GROUND 
    • Ignition OFF.
    • Disconnect: ABS Module C135.
    • Disconnect: Brake Booster Vacuum Sensor C1603.
    • Measure the resistance between ground and:
      • brake booster vacuum sensor C1603-1, circuit VCA38 (BN/VT), harness side.
      • brake booster vacuum sensor C1603-2, circuit RCA37 (WH/BU), harness side.
      • brake booster vacuum sensor C1603-3, circuit LCA37 (YE/OG), harness side.
      Fig 1: Checking Brake Booster Vacuum Sensor Circuits For Short To Ground
      G07784291Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10,000 ohms? 
    • Yes  : GO to K8.
    • No  : REPAIR the affected circuit(s). CLEAR the DTCs. REPEAT the self-test.
  8. K8 CHECK THE BRAKE BOOSTER VACUUM SENSOR CIRCUITS FOR AN OPEN 
    • Measure the resistance between the ABS module C135, harness side and the brake booster vacuum sensor C1603, harness side as indicated in the following table:
      VACUUM SENSOR RESISTANCE TABLE

      ABS Module Circuit Vacuum Sensor
      C135-30 VCA38 (BN/VT) C1603-1
      C135-27 RCA37 (WH/BU) C1603-2
      C135-26 LCA37 (YE/OG) C1603-3
      Fig 2: Checking Brake Booster Vacuum Sensor Circuits For Open
      G07784292Courtesy of FORD MOTOR CO.
    • Are the resistances less than 5 ohms? 
    • Yes  : GO to K9.
    • No  : REPAIR the affected circuit(s). CLEAR the DTCs. REPEAT the self-test.
  9. K9 CHECK THE BRAKE BOOSTER VACUUM SENSOR CIRCUITS FOR A SHORT TOGETHER 
    • Measure the resistance between:
      • brake booster vacuum sensor C1603-1, circuit VCA38 (BN/VT), harness side and brake booster vacuum sensor C1603-2, circuit RCA37 (WH/BU), harness side.
      • brake booster vacuum sensor C1603-1, circuit VCA38 (BN/VT), harness side and brake booster vacuum sensor C1603-3, circuit LCA37 (YE/OG), harness side.
      • brake booster vacuum sensor C1603-2, circuit RCA37 (WH/BU), harness side, and brake booster vacuum sensor C1603-3, circuit LCA37 (YE/OG), harness side.
      Fig 3: Checking Brake Booster Vacuum Sensor Circuits For Short Together
      G07784293Courtesy of FORD MOTOR CO.
    • Are the resistances greater than 10,000 ohms? 
    • Yes  : GO to K10.
    • No  : REPAIR the affected circuit(s). CLEAR the DTCs. REPEAT the self-test.
  10. K10 CHECK THE ACTIVE BRAKE BOOSTER CIRCUITS FOR A SHORT TO VOLTAGE 
    • Ignition ON.
    • Measure the voltage between ground and:
      • brake booster vacuum sensor C1603-1, circuit VCA38 (BN/VT), harness side.
      • brake booster vacuum sensor C1603-2, circuit RCA37 (WH/BU), harness side.
      • brake booster vacuum sensor C1603-3, circuit LCA37 (YE/OG), harness side.
      Fig 4: Checking Active Brake Booster Circuits For Short To Voltage
      G07784294Courtesy of FORD MOTOR CO.
    • Is any voltage present? 
    • Yes  : REPAIR the affected circuit(s). CLEAR the DTCs. REPEAT the self-test.
    • No  : GO to K11.
  11. K11 CHECK THE ABS MODULE CONNECTORS 
    • Check ABS module C135 for:
      • corrosion.
      • pushed-out pins.
      • spread terminals.
    • Connect: ABS Module C135.
    • Make sure the connector seats correctly, then operate the system and verify the concern is still present.
    • Is the concern still present? 
    • Yes  : INSTALL a new ABS module. REFER to ANTI-LOCK BRAKE SYSTEM (ABS) MODULE  in this service information. TEST the system for normal operation.
    • 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 self-test.
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