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Home >> Ford >> 2009 >> Taurus X SEL, FWD >> Repair and Diagnosis >> Brakes >> Traction Control >> Anti-Lock Brake System - Vehicle Dynamic Systems >> Diagnostic Tests >> Anti-Lock Control >> Pinpoint Tests >> Pinpoint Test I: DTCs C1279, C1280, C1282 and U0074 - Sensor Cluster Fault >> PINPOINT TEST I: DTCs C1279, C1280, C1282 AND U0074 - SENSOR CLUSTER FAULT

PINPOINT TEST I: DTCs C1279, C1280, C1282 AND U0074 - SENSOR CLUSTER FAULT

CAUTION: Use the Flex Probe Kit for all test connections to prevent damage to the wiring terminals. Do not use standard multi-meter probes.
NOTE: The vehicle must be on level ground, not on a hoist and at a complete standstill. Any vehicle movement will result in false values for this test.
  1. I1 CARRY OUT THE CALIBRATION PROCEDURE 
    • Connect the diagnostic tool.
    • Key in ON position.
    • Enter the following diagnostic mode on the diagnostic tool: Clear the DTCs
    • Carry out the ABS module calibration procedure following the scan tool directions.
    • Test drive the vehicle.
    • Retrieve and record any ABS module DTCs.
    • Are any DTCs retrieved or does the calibration procedure indicate a fault? 
    1. YES  : If DTC C1279, C1280 or C1282 is retrieved or if the calibration procedure indicates a fault, go to  I2.

      If DTC U0074 is retrieved, go to  I5.

      If any other DTCs are retrieved, go to the ABS Module DTC Table .

    2. NO  : The system is operating correctly at this time. The concern may have been caused by an incorrect ABS module calibration. CLEAR the DTCs. REPEAT the self-test.
  2. I2 CHECK THE VOLTAGE TO THE SENSOR CLUSTER 
    • Key in OFF position.
    • Disconnect: Sensor Cluster C3073
    • Key in ON position.
    • Measure the voltage between sensor cluster C3073-4, circuit CBB38 (GY/BU), harness side and ground.
      • Fig 1: Measuring Voltage
      GF0045794Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 
    1. YES  : Go to  I3.
    2. NO  : VERIFY that BJB fuse 38 (10A) is OK. If OK, REPAIR circuit CBB38 (GY/BU). CLEAR the DTCs. REPEAT the self-test.

      If the fuse is open, REFER to the appropriate System Wiring Diagrams article to identify possible causes of the circuit short.

  3. I3 CHECK CIRCUIT RCA09 (GN/VT) FOR AN OPEN 
    • Key in OFF position.
    • Disconnect: ABS Module C135
    • Measure the resistance between sensor cluster C3073-1, circuit RCA09 (GN/VT), harness side and ABS module C135-12, circuit RCA09 (GN/VT), harness side.
      • Fig 2: Measuring Resistance
      GF0045795Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    1. YES  : Go to  I4.
    2. NO  : REPAIR circuit RCA09 (GN/VT). CLEAR the DTCs. REPEAT the self-test.
  4. I4 CHECK CIRCUIT RCA09 (GN/VT) FOR SHORT TO VOLTAGE 
    • Key in ON position.
    • Measure the voltage between sensor cluster C3073-1, circuit RCA09 (GN/VT), harness side and ground.
      • Fig 3: Measuring Voltage
      GF0045796Courtesy of FORD MOTOR CO.
    • Is any voltage present? 
    1. YES  : REPAIR circuit RCA09 (GN/VT). CLEAR the DTCs. REPEAT the self-test.
    2. NO  : Go to  I5.
  5. I5 CHECK THE ABS MODULE YAW RATE (YAW_RATE_2) PID 
    • Key in OFF position.
    • Connect: Sensor Cluster C3073
    • Connect: ABS Module C135
    • Connect the diagnostic tool.
    • Key in ON position.
    • Enter the following diagnostic mode on the diagnostic tool: DataLogger ABS
      • NOTE: The vehicle must be on level ground and at a complete standstill. Any vehicle movement results in false values for this test.
    • Monitor the YAW_RATE_2 PID.
    • Is the YAW_RATE_2 PID value between -0.05 and 0.05? 
    1. YES  : Go to  I6.
    2. NO  : CHECK the mounting of the sensor cluster. If OK, INSTALL a new sensor cluster. REFER to Stability Control Sensor Cluster . CLEAR the DTCs. REPEAT the self-test.
  6. I6 CHECK THE ABS MODULE LATERAL ACCELERATION (LAT_ACEL_2) PID 
    • Enter the following diagnostic mode on the diagnostic tool: DataLogger ABS
      • NOTE: The vehicle must be on level ground and at a complete standstill. Any vehicle movement results in false values for this test.
    • Monitor the LAT_ACCL_2 PID.
    • Is the LAT_ACCL_2 PID value between -0.007 and 0.007? 
    1. YES  : Go to  I7.
    2. NO  : CHECK the mounting of the sensor cluster. If OK, INSTALL a new sensor cluster. REFER to Stability Control Sensor Cluster . CLEAR the DTCs. REPEAT the self-test.
  7. I7 CHECK CIRCUITS VDB04 (WH/BU) AND VDB05 (WH) FOR AN OPEN 
    • Key in OFF position.
    • Disconnect: ABS Module C135
    • Disconnect: Sensor Cluster C3073
    • Measure the resistance between ABS module C135, harness and sensor cluster C3073, harness side using the following chart:
      ABS Module Circuit Sensor Cluster
      C135-37 VDB04 (WH/BU) C3073-3
      C135-24 VDB05 (WH) C3073-2
      • Fig 4: Measuring Resistance
      GF0045797Courtesy of FORD MOTOR CO.
    • Are the resistances less than 5 ohms? 
    1. YES  : Go to  I8.
    2. NO  : REPAIR the affected circuit(s). CLEAR the DTCs. REPEAT the self-test.
  8. I8 CHECK CIRCUITS VDB04 (WH/BU) AND VDB05 (WH) FOR A SHORT TO GROUND 
    • Measure the resistance between ground and:
      • sensor cluster C3073-3, circuit VDB04 (WH/BU), harness side.
      • sensor cluster C3073-2, circuit VDB05 (WH), harness side.
      • Fig 5: Measuring Resistance
      GF0045798Courtesy of FORD MOTOR CO.
    • Are the resistances greater than 10,000 ohms? 
    1. YES  : Go to  I9.
    2. NO  : REPAIR the affected circuit(s). CLEAR the DTCs. REPEAT the self-test.
  9. I9 CHECK CIRCUITS VDB04 (WH/BU) AND VDB05 (WH) FOR A SHORT TO VOLTAGE 
    • Key in ON position.
    • Measure the voltage between ground and:
      • sensor cluster C3073-3, circuit VDB04 (WH/BU), harness side.
      • sensor cluster C3073-2, circuit VDB05 (WH), harness side.
      • Fig 6: Measuring Voltage
      GF0045799Courtesy of FORD MOTOR CO.
    • Is any voltage present? 
    1. YES  : REPAIR the affected circuit(s). CLEAR the DTCs. REPEAT the self-test.
    2. NO  : Go to  I10.
  10. I10 CHECK FOR CORRECT ABS MODULE OPERATION 
    • Disconnect all the ABS connectors.
    • Check for:
      • corrosion.
      • pushed-out pins.
      • spread terminals.
    • Connect all the ABS connectors and make sure they seat 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 . TEST the system for normal operation.
    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 self-test.
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