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Home >> Ford >> 2005 >> Escape Base, 3.0 1, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1151 (Anti-Lock Brake System) >> Diagnostic Tests >> Anti-Lock Control - Non-Hybrid >> Pinpoint Tests >> Pinpoint Test E: DTCs B2741, C1279, C1280, C1281, C1282, C1516, C1517, C2769, C2770, C2777, C2778 and U1901 - Sensor Cluster Fault >> PINPOINT TEST E: DTCs B2741, C1279, C1280, C1281, C1282, C1516, C1517, C2769, C2770, C2777, C2778 AND U1901 - SENSOR CLUSTER FAULT

PINPOINT TEST E: DTCs B2741, C1279, C1280, C1281, C1282, C1516, C1517, C2769, C2770, C2777, C2778 AND U1901 - SENSOR CLUSTER FAULT

WARNING: This page is about a different car, the 2008 Mercury Mariner and 2008 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Use the Flex Probe Kit for all test connections to prevent damage to the wiring terminals. Do not use standard multi-meter probes.
NOTE: Before diagnosing the sensor cluster, always check the sensor cluster installation and mounting surface. The cluster should be installed with the electrical connector facing the RH side of the vehicle and cluster mounting surface should be clean and free of any foreign objects.
NOTE: The yaw rate sensor, roll rate sensor, lateral accelerometer and longitudinal accelerometer are integral to the sensor cluster.
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. E1 CHECK THE DTCs FROM THE SELF-TEST 
    • Connect the diagnostic tool.
    • Key in ON position.
    • Using the scan tool, clear the DTCs, carry out the self-test and retrieve any DTCs.
    • Are any DTCs retrieved? 
    1. YES  : Go to  E2.
    2. NO  : The ABS is operating correctly at this time.
  2. E2 CHECK THE VOLTAGE FROM THE ABS MODULE 
    • Key in OFF position.
    • Disconnect: Sensor Cluster C3296
    • Key in ON position.
    • Measure the voltage between sensor cluster C3296-3, circuit CCA09 (VT/BN), harness side and sensor cluster C3296-5, circuit RCA09 (GN/VT), harness side.
      • Fig 1: Checking Circuit For Voltage
      GF0022457Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 
    1. YES  : Go to  E3.
    2. NO  : Go to  E7.
  3. E3 CHECK THE ABS MODULE YAW RATE PARAMETER ID (PID) 
    • Key in OFF position.
    • Connect: Sensor Cluster C3296
    • Key in ON position.
      • NOTE: The vehicle must be on level ground and at a complete standstill. Any vehicle movement results in false values for this test.
    • Using the scan tool, monitor the ABS module yaw rate PID.
    • Is the ABS module yaw rate PID value between -0.05 and 0.05? 
    1. YES  : Go to  E4.
    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.
  4. E4 CHECK THE ABS MODULE LATERAL ACCELERATION PID 
      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 ABS module lateral acceleration PID.
    • Is the ABS module lateral acceleration PID value between -0.007 and 0.007? 
    1. YES  : Go to  E5.
    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.
  5. E5 CHECK THE ABS MODULE LONGITUDINAL ACCELERATION PID 
      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 ABS module longitudinal acceleration PID.
    • Is the ABS module longitudinal acceleration PID value between -0.004 and 0.004? 
    1. YES  : Go to  E6.
    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. E6 CHECK THE ABS MODULE ROLL RATE PID 
    NOTE: The vehicle must be on level ground and at a complete standstill. Any vehicle movement will result in false values for this test.
    • Monitor the ABS module roll rate PID.
    • Is the ABS module roll rate PID value between -0.05 and 0.05? 
    1. YES  : Go to  E7.
    2. NO  : CHECK the mounting of the sensor cluster. If OK, INSTALL a new sensor cluster. CLEAR the DTCs.
  7. E7 CHECK THE SENSOR CLUSTER CIRCUITRY FOR AN OPEN 
    • Key in OFF position.
    • Disconnect: Sensor Cluster C3296
    • Disconnect: ABS Module C155
    • Measure the resistance between:
      • ABS module C155-18, circuit VCA23 (BU/WH), harness side and sensor cluster C3296-2, circuit VCA23 (BU/WH), harness side.
      • ABS module C155-19, circuit VCA24 (GN/OG), harness side and sensor cluster C3296-1, circuit VCA24 (GN/OG), harness side.
      • ABS module C155-22, circuit CCA09 (VT/BN), harness side and sensor cluster C3296-3, circuit CCA09 (VT/BN), harness side.
      • ABS module C155-29, circuit RCA09 (GN/VT), harness side and sensor cluster C3296-5, circuit RCA09 (GN/VT), harness side.
      • Fig 2: Checking Circuits For Open
      GF0022458Courtesy of FORD MOTOR CO.
    • Are the resistances less than 5 ohms? 
    1. YES  : Go to  E8.
    2. NO  : REPAIR the affected circuit(s). CLEAR the DTCs. REPEAT the self-test.
  8. E8 CHECK THE SENSOR CLUSTER CIRCUITRY FOR A SHORT TO VOLTAGE 
    • Key in ON position.
    • Measure the voltage between ground and:
      • Sensor cluster C3296-1, circuit VCA24 (GN/OG), harness side.
      • Sensor cluster C3296-2, circuit VCA23 (BU/WH), harness side.
      • Sensor cluster C3296-3, circuit CCA09 (VT/BN), harness side.
      • Sensor cluster C3296-5, circuit RCA09 (GN/VT), harness side.
      • Fig 3: Checking Circuits For Voltage
      GF0022459Courtesy of FORD MOTOR CO.
    • Are voltages present? 
    1. YES  : REPAIR the affected circuit(s). CLEAR the DTCs. REPEAT the self-test.
    2. NO  : Go to  E9.
  9. E9 CHECK THE SENSOR CLUSTER CIRCUITRY FOR A SHORT TO GROUND 
    • Key in OFF position.
    • Measure the resistance between ground and:
      • Sensor cluster C3296-1, circuit VCA24 (GN/OG), harness side.
      • Sensor cluster C3296-2, circuit VCA23 (BU/WH), harness side.
      • Sensor cluster C3296-3, circuit CCA09 (VT/BN), harness side.
      • Sensor cluster C3296-5, circuit RCA09 (GN/VT), harness side.
      • Fig 4: Checking Circuits For Short To Ground
      GF0022460Courtesy of FORD MOTOR CO.
    • Are the resistances greater than 10,000 ohms? 
    1. YES  : Go to  E10.
    2. NO  : REPAIR the affected circuit(s). CLEAR the DTCs. REPEAT the self-test.
  10. E10 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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