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Home › Lincoln › 2006 › Town Car Protection Series, 4.6 V › Repair and Diagnosis › Brakes › Traction Control › Vehicle Dynamic Systems › Diagnosis And Testing › Anti-Lock Control › Inspection and Verification

Inspection and Verification

  1. Verify the customer concern.
  2. Verify the stoplamps operate correctly by applying and releasing the brake pedal with the ignition switch in the OFF position. If the stoplamps do not operate correctly, refer to EXTERIOR LIGHTING . If the stoplamps operate correctly, proceed to the next step.
  3. Visually inspect for obvious signs of mechanical or electrical damage.
    VISUAL INSPECTION CHART

    Mechanical Electrical
    • Base brake system
    • Incorrectly inflated tires
    • Mismatched wheels or tires
    • Hydraulic control unit (HCU)
    • Battery junction box (BJB) fuse(s):
      • 106 (40A)
      • 109 (20A)
    • Central junction box (CJB) fuse(s):
      • 17 (10A)
      • 25 (10A)
    • Damaged connectors or connections
    • Circuitry
    • Front wheel speed sensor jumper harness
    • Wheel speed sensor
    • Stoplamp switch
    • Anti-lock brake system (ABS) module
  4. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
  5. If the cause is not visually evident, connect the diagnostic tool to the data link connector (DLC) and select the vehicle to be tested from the diagnostic tool menu. If the diagnostic tool does not communicate with the vehicle:
    • check that the program card is correctly installed.
    • check the connections to the vehicle.
    • check the ignition switch position.
  6. If the diagnostic tool still does not communicate with the vehicle, refer to the diagnostic tool operating manual.
  7. Carry out the diagnostic tool data link test. If the diagnostic tool responds with:
    • CAN, SCP, UBP or ISO circuit fault; all electronic control units no response/not equipped, refer to MODULE COMMUNICATIONS NETWORK .
    • No response/not equipped for the ABS module, GO to PINPOINT TEST F .
    • System passed, retrieve and record the continuous diagnostic trouble codes (DTCs), erase the continuous DTCs and carry out self-test diagnostics for the ABS module.
  8. If the DTCs retrieved are related to the concern, go to the ANTI-LOCK BRAKE SYSTEM (ABS) MODULE DIAGNOSTIC TROUBLE CODE (DTC) INDEX .
  9. If no DTCs related to the concern are retrieved, GO to SYMPTOM CHART .
ANTI-LOCK BRAKE SYSTEM (ABS) MODULE DIAGNOSTIC TROUBLE CODE (DTC) INDEX

DTCs DTC Caused By Description Action
B1342 ABS Module ECU is Defective INSTALL a new ABS module. REFER to ANTI-LOCK BRAKE SYSTEM (ABS) MODULE  in this article.
B1484 ABS Module Brake Pedal Input Open Circuit GO to PINPOINT TEST D .
B1596 ABS Module Service Continuous Codes
NOTE: If other DTCs are present, REPAIR them before installing a new component.
TURN the ignition switch to the OFF position and wait at least 30 seconds. Turn the ignition switch to the ON position. REPEAT the ABS self-test. If any DTCs are retrieved, REFER to the ANTI-LOCK BRAKE SYSTEM (ABS) MODULE DIAGNOSTIC CODE (DTC) INDEX . If no DTCs are retrieved, CARRY OUT a drive test above 15 km/h (9 mph), then REFER to the SYMPTOM CHART .
B1676 ABS Module Battery Voltage Out of Range GO to PINPOINT TEST E .
C1145 ABS Module Speed Wheel Sensor RF Input Circuit Failure GO to PINPOINT TEST B .
C1155 ABS Module Speed Wheel Sensor LF Input Circuit Failure GO to PINPOINT TEST B .
C1165 ABS Module Speed Wheel Sensor RR Input Circuit Failure GO to PINPOINT TEST B .
C1175 ABS Module Speed Wheel Sensor LR Input Circuit Failure GO to PINPOINT TEST B .
C1222 ABS Module Speed Wheel Mismatch Make sure the tires are the same size and correctly inflated. INSPECT the wheel speed sensor rings. CLEAR the DTC. TEST drive the vehicle. REPEAT the self-test.
C1266 ABS Module ABS Valve Power Relay Circuit Failure GO to PINPOINT TEST K .
C1296 ABS Module Wheel Speed LF Signal Fault GO to PINPOINT TEST C .
C1297 ABS Module Wheel Speed RF Signal Fault GO to PINPOINT TEST C .
C1298 ABS Module Wheel Speed RR Signal Fault GO to PINPOINT TEST C .
C1299 ABS Module Wheel Speed LR Signal Fault GO to PINPOINT TEST C .
C1300 ABS Module ABS Hydraulic Pump Motor Circuit Failure GO to PINPOINT TEST A .
C1805 ABS Module Mismatched PCM and ABS Modules Do Not Match CHECK the part numbers. INSTALL the correct module.
C2775 ABS Module TC ON/OFF Switch Stuck Failure GO to PINPOINT TEST H .
U0073 CAN Bus Control Module Communication Bus Off REFER to MODULE COMMUNICATIONS NETWORK .
U1900 CAN Bus CAN communication Bus Fault - Receive error REFER to MODULE COMMUNICATIONS NETWORK .
U2023 CAN Bus Fault received from External Node REFER to MODULE COMMUNICATIONS NETWORK .
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