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Home >> Ford >> 2007 >> Freestar Limited >> Repair and Diagnosis >> Brakes >> Traction Control >> Anti-Lock Brake System >> Diagnostic Tests >> Anti-Lock Control >> Inspection and Verification
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Inspection and Verification

  1. Verify the customer concern.
  2. Verify the base brake system operates correctly by pressing and releasing the brake pedal with the ignition switch in the OFF position. If the stoplamps do not operate correctly, refer to EXTERIOR LIGHTING article. If the stoplamps operate correctly, proceed to the next step.
  3. Verify the base brake system operates correctly. If any concerns are present address them before continuing with any ABS concerns. Refer to BRAKE SYSTEM - GENERAL INFORMATION article. If the stoplamps operate correctly, proceed to the next step.
  4. Verify that the PRNDL operates correctly. If the PRNDL does not operate correctly, refer to INSTRUMENT CLUSTER article. If the PRNDL operates correctly, proceed to the next step.
  5. Visually inspect for obvious signs of mechanical or electrical damage.
    VISUAL INSPECTION CHART

    Mechanical Electrical
    • Wheel and tire sizes
    • Brake fluid level
    • HCU
    • Base brake system
    • Brake booster vacuum hose
    • Steering components, suspension components and tire size
    • Steering wheel rotation sensor
    • Battery junction box (BJB) fuse(s):
      • 8 (40A)
      • 12 (40A)
    • Smart junction box (SJB) fuse(s):
      • 16 (5A)
      • 18 (10A)
    • Circuitry
    • Wheel speed sensor
    • Traction control switch
    • Brake pedal position (BPP) switch
    • Steering wheel rotation sensor
    • Brake booster solenoid
    • Brake booster release switch
    • Brake pressure transducer
    • Sensor cluster
    • Stoplamp isolation relay
    • Brake fluid level switch
    • ABS module
  6. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
    7. NOTE: Make sure to use the latest scan tool software release.
  7. If the cause is not visually evident, connect the scan tool to the data link connector (DLC) and select the vehicle to be tested from the scan tool menu.
    8. NOTE: The vehicle communication module (VCM) LED prove-out confirms power and ground from the DLC are provided to the VCM.
  8. If the scan tool does not communicate with the VCM:
    • check the VCM connection to the vehicle.
    • check the scan tool connection to the vehicle
    • Refer to MODULE COMMUNICATIONS NETWORK article, No Power to the Scan Tool, to diagnose no communication with the scan tool.
  9. If the scan tool still does not communicate with the vehicle, refer to the scan tool operating manual.
  10. Carry out the scan tool data link test. If the scan tool responds with:
    • CAN circuit fault; all electronic control units no response/not equipped, refer to MODULE COMMUNICATIONS NETWORK article.
    • No response/not equipped for the ABS module, go to Pinpoint Test A .
    • System passed, retrieve and record the continuous diagnostic trouble codes (DTCs). Erase the continuous DTCs. Test drive the vehicle. Be sure to include at least one stop that includes ABS activation. Carry out ABS module self-test diagnostics.
  11. If the DTCs retrieved are related to the concern, go to the Anti-Lock Brake System (ABS) Module Diagnostic Trouble Code (DTC) Index.
  12. If no DTCs related to the concern are retrieved, go to Symptom Chart .
NOTE: The need to recalibrate the module is indicated by the active/fail lamp flashing. There are other service actions that can require recalibration when there is no flashing lamp.
ANTI-LOCK BRAKE SYSTEM (ABS) MODULE DIAGNOSTIC TROUBLE CODE (DTC) INDEX

DTC Description Source Action
B1317 Battery Voltage High Anti-Lock Brake System (ABS) Module Go to Pinpoint Test K .
B1318 Battery Voltage Low ABS Module Go to Pinpoint Test K .
B1342 ECU Is Defective ABS Module
NOTE: If other DTCs are present, REPAIR them before installing a new component.
CLEAR the DTCs. RETRIEVE the DTCs. If DTC B1342 is retrieved again, INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) Module . REPEAT the self-test.
B2477 Module Configuration Failure ABS Module RECONFIGURE the ABS module. REFER to MODULE CONFIGURATION article. CLEAR the DTCs. RETRIEVE the DTCs. If DTC B2477 is retrieved again, INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) Module . REPEAT the self-test.
C1095 ABS Hydraulic Pump Motor Circuit Failure ABS Module Go to Pinpoint Test C .
C1096 ABS Hydraulic Pump Motor Circuit Open ABS Module Go to Pinpoint Test C .
C1115 ABS Power Relay Output Short Circuit To Battery ABS Module CLEAR all DTCs. DRIVE the vehicle. If DTC C1115 is retrieved again, INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) Module . CARRY OUT the self-test with the brake pedal not applied.
C1145 Wheel Speed Sensor RF Input Circuit Failure ABS Module Go to Pinpoint Test D .
C1155 Wheel Speed Sensor LF Input Circuit Failure ABS Module Go to Pinpoint Test D .
C1165 Wheel Speed Sensor RR Input Circuit Failure ABS Module Go to Pinpoint Test D .
C1175 Wheel Speed Sensor LR Input Circuit Failure ABS Module Go to Pinpoint Test D .
C1185 ABS Power Relay Output Circuit Failure ABS Module CLEAR all DTCs. If DTC C1185 is retrieved again, INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) Module . CARRY OUT the self-test with the brake pedal not applied.
C1194 ABS Outlet Valve Coil LF Circuit Failure ABS Module CLEAR all DTCs. DRIVE the vehicle. If DTC C1194 is retrieved again, INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) Module . CARRY OUT the self-test with the brake pedal not applied.
C1198 ABS Inlet Valve Coil LF Circuit Failure ABS Module CLEAR all DTCs. DRIVE the vehicle. If the DTC is still present, INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) Module . CARRY OUT the self-test with the brake pedal not applied.
C1210 ABS Outlet Valve Coil RF Circuit Failure ABS Module CLEAR all DTCs. DRIVE the vehicle. If the DTC is still present, INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) Module . CARRY OUT the self-test with the brake pedal not applied.
C1214 ABS Inlet Valve Coil RF Circuit Failure ABS Module CLEAR all DTCs. DRIVE the vehicle. If the DTC is still present, INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) Module . CARRY OUT the self-test with the brake pedal not applied.
C1222 Speed Wheel Mismatch ABS Module Go to Pinpoint Test E .
C1233 Wheel Speed LF Input Signal Missing ABS Module Go to Pinpoint Test E .
C1234 Wheel Speed RF Input Signal Missing ABS Module Go to Pinpoint Test E .
C1235 Wheel Speed RR Input Signal Missing ABS Module Go to Pinpoint Test E .
C1236 Wheel Speed LR Input Signal Missing ABS Module Go to Pinpoint Test E .
C1242 ABS Outlet Valve Coil LR Circuit Failure ABS Module CLEAR all DTCs. DRIVE the vehicle. If the DTC is still present, INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) Module . CARRY OUT the self-test with the brake pedal not applied.
C1246 ABS Outlet Valve Coil RR Circuit Failure ABS Module CLEAR all DTCs. DRIVE the vehicle. If the DTC is still present, INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) Module . CARRY OUT the self-test with the brake pedal not applied.
C1250 ABS Inlet Valve Coil LR Circuit Failure ABS Module CLEAR all DTCs. DRIVE the vehicle. If the DTC is still present, INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) Module . CARRY OUT the self-test with the brake pedal not applied.
C1254 ABS Inlet Valve Coil RR Circuit Failure ABS Module CLEAR all DTCs. DRIVE the vehicle. If the DTC is still present, INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) Module . CARRY OUT the self-test with the brake pedal not applied.
C1277 Steering Wheel Angle 1 and 2 Circuit Failure ABS Module Go to Pinpoint Test F .
C1278 Steering Wheel Angle 1 and 2 Signal Faulted ABS Module Go to Pinpoint Test F .
C1279 Yaw Rate Sensor Circuit Failure ABS Module Go to Pinpoint Test G .
C1280 Yaw Rate Sensor Signal Fault ABS Module Go to Pinpoint Test G .
C1281 Lateral Accelerometer Circuit Failure ABS Module Go to Pinpoint Test G .
C1282 Lateral Accelerometer Signal Fault ABS Module Go to Pinpoint Test G .
C1285 Booster Solenoid Circuit Failure ABS Module Go to Pinpoint Test H .
C1287 Booster Pedal Force Switch Circuit Failure ABS Module Go to Pinpoint Test I .
C1288 Brake Pressure Transducer Main/Primary Input Circuit Failure ABS Module Go to Pinpoint Test A .
C1329 RF Dump Valve Solenoid Overtemp ABS Module Go to Pinpoint Test M .
C1330 LR Dump Valve Solenoid Overtemp ABS Module Go to Pinpoint Test M .
C1331 RR Dump Valve Solenoid Overtemp ABS Module Go to Pinpoint Test M .
C1332 LF Dump Valve Solenoid Overtemp ABS Module Go to Pinpoint Test M .
C1333 LR ISO Valve Solenoid Overtemp ABS Module Go to Pinpoint Test M .
C1334 LF ISO Valve Solenoid Overtemp ABS Module Go to Pinpoint Test M .
C1335 RF ISO Valve Solenoid Overtemp ABS Module Go to Pinpoint Test M .
C1336 RR ISO Valve Solenoid Overtemp ABS Module Go to Pinpoint Test M .
C1404 Traction Control Valve Rear Circuit Failure ABS Module CLEAR all DTCs. DRIVE the vehicle. If the DTC is still present, INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) Module . CARRY OUT the self-test with the brake pedal not applied.
C1410 Traction Control Valve LF Circuit Failure ABS Module CLEAR all DTCs. DRIVE the vehicle. If the DTC is still present, INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) Module . CARRY OUT the self-test with the brake pedal not applied.
C1446 Brake Switch Circuit Failure ABS Module Go to Pinpoint Test O .
C1527 TC ISO Valve Solenoid 1 Overtemp ABS Module Go to Pinpoint Test M .
C1528 TC ISO Valve Solenoid 2 Overtemp ABS Module Go to Pinpoint Test M .
C1529 ECA Valve Solenoid Overtemp ABS Module Go to Pinpoint Test M .
C1530 TC Supply Valve Solenoid 1 Overtemp ABS Module Go to Pinpoint Test M .
C1531 TC Supply Valve Solenoid 2 Overtemp ABS Module Go to Pinpoint Test M .
C1730 Reference Voltage Out of Range (+5 V) ABS Module If any other DTC(s) are present, diagnose those DTC(s) first. CLEAR all DTCs. DRIVE the vehicle. If the DTC is still present, go to Pinpoint Test P .
C1957 Stability Assist Control Valve RF Circuit Failure ABS Module CLEAR all DTCs. DRIVE the vehicle. If the DTC is still present, INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) Module . CARRY OUT the self-test with the brake pedal not applied.
C1958 Stability Assist Control Valve LF Circuit Failure ABS Module CLEAR all DTCs. DRIVE the vehicle. If the DTC is still present, INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) Module . CARRY OUT the self-test with the brake pedal not applied.
C1963 Stability Control Inhibit Warning ABS Module This DTC is for information only. CLEAR all DTCs.
C1991 Module Calibration Failure ABS Module Go to Pinpoint Test L .
U0073 Control Module Communication Bus OFF High Speed Communication Area Network (HS-CAN) Repair all other DTCs first. If the DTC is still present, diagnose the communication network. REFER to MODULE COMMUNICATIONS NETWORK article.
U1050 SCP (J1850) Invalid or Missing Data For Brakes ABS Module Repair all other DTCs first. If the DTC is still present, diagnose the communication network. REFER to MODULE COMMUNICATIONS NETWORK article.
U1051 SCP (J1850) Invalid or Missing Data For Brakes ABS Module Repair all other DTCs first. If the DTC is still present, diagnose the communication network. REFER to MODULE COMMUNICATIONS NETWORK article.
U1059 SCP (J1850) Invalid or Missing Data For Transmission/Transaxle/PRNDL ABS Module Repair all other DTCs first. If the DTC is still present, diagnose the communication network. REFER to MODULE COMMUNICATIONS NETWORK article.
U1073 SCP (J1850) Invalid or Missing Data For Engine Coolant ABS Module Repair all other DTCs first. If the DTC is still present, diagnose the communication network. REFER to MODULE COMMUNICATIONS NETWORK article.
U1243 SCP (J1850) Invalid or Missing Data For Exterior Environment ABS Module Repair all other DTCs first. If the DTC is still present, diagnose the communication network. REFER to MODULE COMMUNICATIONS NETWORK article.
U1249 SCP (J1850) Invalid or Missing Data For Time/Date ABS Module Repair all other DTCs first. If the DTC is still present, diagnose the communication network. REFER to MODULE COMMUNICATIONS NETWORK article.
U1262 SCP (J1850) Communication Bus Fault ABS Module REFER to MODULE COMMUNICATIONS NETWORK article.
U1900 CAN Communication Bus Fault Receiving Error HS-CAN Repair all other DTCs first. If the DTC is still present, diagnose the communication network. REFER to MODULE COMMUNICATIONS NETWORK article.
U2050 No Application Present ABS Module CONFIGURE the ABS module. REFER to MODULE CONFIGURATION article. CLEAR the DTCs. RETRIEVE the DTCs and VERIFY successful module configuration. If DTC U2050 is retrieved again, INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) Module . CLEAR the DTC. REPEAT the self-test.
U2051 One or More Calibration Files Missing or Corrupt ABS Module CALIBRATE the ABS module, follow the directions on the scan tool. CLEAR the DTCs. CARRY OUT the ABS module self-test. RETRIEVE and RECORD any DTCs. If DTC U2051 is retrieved again, INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) Module . CLEAR the DTC. REPEAT the self-test.

For a complete master list of DTCs, refer to MULTIFUNCTION ELECTRONIC MODULES article.

INSTRUMENT CLUSTER DIAGNOSTIC TROUBLE CODE (DTC) INDEX

DTC Description Source Action
C1093 Traction Control Disable Switch Circuit Failure Instrument Cluster Go to Pinpoint Test B .
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