PINPOINT TEST I: DTCs C1279, C1280, C1281, C1282, C1516, C1517, C1963, C1975, C2769, C2770 AND U0074

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: 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.

I1 CHECK FOR RETURNING DTCs
- Connect the scan tool.
- Ignition ON.
- Using the scan tool, clear all ABS module DTCs.
- Test drive the vehicle above 20 km/h (12 mph), making several tight circles and hard braking maneuvers.
- Retrieve and record any ABS module DTCs.
- Does C1279, C1280, C1281, C1282, C1516, C1517, C1963, C1975, C2769 and/or C2770 return?
- Yes : If DTC C1963 and/or C1975 are retrieved, GO to I2.
  If DTC C1279, C1280, C1281, C1282, C1516, C1517, C2769 or C2770 is retrieved, GO to I3.
  
  If DTC U0074 is retrieved, GO to I7.
  
  If any other DTCs are retrieved, GO to the ABS MODULE DTC CHART .
- No : The system is operating correctly at this time. CLEAR the DTCs. REPEAT the self-test.
I2 CHECK THE STABILITY CONTROL SENSOR CLUSTER CONDITION AND INSTALLATION
- Inspect the stability control sensor cluster for cracks in the case, broken anchor tabs, broken electrical connector and correct installation. Refer to STABILITY CONTROL SENSOR CLUSTER .
- Is the sensor cluster installed correctly and undamaged?
- Yes : GO to I3.
- No : REINSTALL or INSTALL new as necessary. CLEAR the DTCs. CYCLE the ignition key. REPEAT the self test.
I3 CHECK THE VOLTAGE TO THE SENSOR CLUSTER
- Ignition OFF.
- Disconnect: Sensor Cluster C3073.
- Ignition ON.
- Measure the voltage between sensor cluster C3073-4, circuit CBP34 (VT/BN), harness side and ground.
  
  Fig 1: Measuring Voltage Between Sensor Cluster C3073-4, Circuit CBP34 (VT/BN) And Ground
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
- Yes : GO to I4.
- No : VERIFY that BJB fuse 34 (10A) is OK. If OK, REPAIR circuit CBP34 (VT/BN). CLEAR the DTCs. CYCLE the ignition key. REPEAT the self-test.
  If not OK, REFER to the appropriate Systems Wiring Diagram to identify possible causes of the circuit short. CLEAR the DTCs. CYCLE the ignition key. REPEAT the self-test.
I4 CHECK CIRCUIT GD145 (BK/BU) FOR AN OPEN
- Ignition OFF.
- Measure the resistance between sensor cluster C3073-1, circuit RCA09 (GN/VT), harness side and ground.
  
  Fig 2: Measuring Resistance Between Sensor Cluster C3073-1, Circuit RCA09 (GN/VT) And Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes : GO to I5.
- No : REPAIR circuit GD145 (BK/BU). CLEAR the DTCs. CYCLE the ignition key. REPEAT the self-test.
I5 CHECK THE ABS MODULE YAW RATE (YAW_RATE_2) PID
- Ignition OFF.
- Connect: Sensor Cluster C3073.
- Connect: ABS Module C135.
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: DataLogger - ABS.
- Monitor the YAW_RATE_2 PID.
- Is the YAW_RATE_2 PID value between -0.05 and 0.05?
- Yes : GO to I6.
- No : CHECK the mounting of the sensor cluster. If OK, INSTALL a new sensor cluster. REFER to STABILITY CONTROL SENSOR CLUSTER . CLEAR the DTCs. CYCLE the ignition key. REPEAT the self-test.
I6 CHECK THE ABS MODULE LATERAL ACCELERATION (LAT_ACEL_2) PID
- Monitor the LAT_ACCL_2 PID.
- Is the LAT_ACCL_2 PID value between -0.007 and 0.007?
- Yes : GO to I7.
- No : CHECK the mounting of the sensor cluster. If OK, INSTALL a new sensor cluster. REFER to STABILITY CONTROL SENSOR CLUSTER . CLEAR the DTCs. CYCLE the ignition key. REPEAT the self-test.

I7 CHECK CIRCUITS VCA23 (BU/WH) AND VCA24 (GN/OG) FOR AN OPEN

Ignition OFF.
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:

RESISTANCE REFERENCE

ABS Module	Circuit	Sensor Cluster
C135-37	VCA23 (BU/WH)	C3073-3
C135-24	VCA24 (GN/OG)	C3073-2

Fig 3: Measuring Resistance Between ABS Module C135, Harness And Sensor Cluster C3073, Harness Side

Courtesy of FORD MOTOR CO.

Are the resistances less than 5 ohms?

Yes : GO to I8.
No : REPAIR the affected circuit(s). CLEAR the DTCs. CYCLE the ignition key. REPEAT the self-test.

I8 CHECK CIRCUITS VCA23 (BU/WH) AND VCA24 (GN/OG) FOR A SHORT TO GROUND
- Measure the resistance between ground and:
  - sensor cluster C3073-3, circuit VCA23 (BU/WH), harness side.
  - sensor cluster C3073-2, circuit VCA24 (GN/OG), harness side.
    
    Fig 4: Measuring Resistance Between Sensor Cluster Circuit And Ground
    Courtesy of FORD MOTOR CO.
- Are the resistances greater than 10,000 ohms?
- Yes : GO to I9.
- No : REPAIR the affected circuit(s). CLEAR the DTCs. CYCLE the ignition key. REPEAT the self-test.
I9 CHECK CIRCUITS VCA23 (BU/WH) AND VCA24 (GN/OG) FOR A SHORT TO VOLTAGE
- Ignition ON.
- Measure the voltage between ground and:
  - sensor cluster C3073-3, circuit VCA23 (BU/WH), harness side.
  - sensor cluster C3073-2, circuit VCA24 (GN/OG), harness side.
    
    Fig 5: Measuring Voltage Between Sensor Cluster Circuit And Ground
    Courtesy of FORD MOTOR CO.
- Is any voltage present?
- Yes : REPAIR the affected circuit(s). CLEAR the DTCs. CYCLE the ignition key. REPEAT the self-test.
- No : GO to I10.
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?
- Yes : INSTALL a new ABS module. REFER to ANTI-LOCK BRAKE SYSTEM (ABS) MODULE . CLEAR the DTCs. CYCLE the ignition key. REPEAT the self-test.
- No : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. CYCLE the ignition key. REPEAT the self-test.