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Home >> Mercury >> 2007 >> Montego Base, AWD >> Repair and Diagnosis >> Brakes >> Traction Control >> Anti-Lock Brake System >> Diagnostic Tests >> Anti-Lock Control >> Inspection and Verification

Inspection and Verification

  1. Verify the customer concern.
  2. Verify the stoplamps operate correctly by pressing and releasing the brake pedal with the ignition switch in the ON position. If the stoplamps do not operate correctly, refer to EXTERIOR LIGHTING article. 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
    • Incorrectly inflated tires
    • Mismatched wheels or tires on vehicle
    • Base brake system
    • Wheel speed sensor
    • Hydraulic control unit (HCU)
    • Battery junction box (BJB) fuse(s):
      • 9 (40A)
      • 12 (20A)
    • Smart junction box (SJB) fuse 19 (10A)
    • Circuitry
    • Stoplamp switch
    • Traction control switch
    • Wheel speed sensors
    • Anti-lock brake system (ABS) module
    4. NOTE: Make sure to use the latest scan tool software release.
  4. If the cause is not visually evident, connect the scan tool to the data link connector (DLC).
    5. NOTE: The vehicle communication module (VCM) LED prove out confirms power and ground from the DLC are provided to the VCM.
  5. If the scan tool does not communicate with the VCM:
    • check the VCM connection to the vehicle.
    • check the scan tool connection to the VCM.
    • refer to MODULE COMMUNICATIONS NETWORK article, No power to the scan tool, to diagnose no communication with the scan tool.
  6. If the scan tool does not communicate with the vehicle:
    • verify the ignition key is in the ON position.
    • verify the scan tool operation with a known good vehicle.
    • refer to MODULE COMMUNICATIONS NETWORK article to diagnose no response from the powertrain control module (PCM).
  7. Carry out the network test.
    • If the scan tool responds with no communication for one or more modules, refer to MODULE COMMUNICATIONS NETWORK article.
    • If the network test passes, retrieve and record continuous memory diagnostic trouble codes (DTCs).
  8. Clear the continuous DTCs and carry out the self-test diagnostics for the anti-lock brake system (ABS) module.
  9. If the DTCs retrieved are related to the concern, go to Anti-Lock Brake System (ABS) Module Diagnostic Trouble Code (DTC) Index. For all other DTCs, refer to MULTIFUNCTION ELECTRONIC MODULES article.
  10. If no DTCs related to the concern are retrieved, go to Symptom Chart .
ANTI-LOCK BRAKE SYSTEM (ABS) MODULE DIAGNOSTIC TROUBLE CODE (DTC) INDEX

DTC Description Source Action
B1342 ECU is Faulted ABS CLEAR the DTCs. RETRIEVE the DTCs. REPEAT the self-test. If DTC B1342 is retrieved again, INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) Module . REPEAT the self-test.
B1484 Brake Pedal Input Open Circuit ABS Go to Pinpoint Test A .
B1596 Service Continuous Codes ABS
NOTE: If other DTCs are present, REPAIR them before installing a new component.
CLEAR the DTCs. CYCLE the ignition switch. RETRIEVE the DTCs. If only DTC B1596 is present, INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) Module . REPEAT the self-test.
B1676 Battery Pack Voltage Out of Range ABS Go to Pinpoint Test B .
B2477 Module Configuration Failure ABS CONFIGURE the ABS module using As Built Data and correct tire size. REFER to MODULE CONFIGURATION article. CLEAR the DTCs. RETRIEVE the DTCs, and verify successful module configuration. If DTC B2477 is retrieved again, INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) Module . REPEAT the self-test.
B2900 VIN Mismatched ABS VERIFY the VIN data, the ABS module and the PCM have the correct as-built data.
C1145 Speed Wheel Sensor RF Input Circuit Failure ABS Go to Pinpoint Test C .
C1155 Speed Wheel Sensor LF Input Circuit Failure ABS Go to Pinpoint Test C .
C1165 Speed Wheel Sensor RR Input Circuit Failure ABS Go to Pinpoint Test C .
C1175 Speed Wheel Sensor LR Input Circuit Failure ABS Go to Pinpoint Test C .
C1222 Wheel Speed Sensor Mismatch ABS Go to Pinpoint Test E .
C1266 ABS Valve Power Relay Circuit Failure ABS Go to Pinpoint Test D .
C1296 Wheel Speed LF Signal Fault ABS Go to Pinpoint Test E .
C1297 Wheel Speed RF Signal Fault ABS Go to Pinpoint Test E .
C1298 Wheel Speed RR Signal Fault ABS Go to Pinpoint Test E .
C1299 Wheel Speed LR Signal Fault ABS Go to Pinpoint Test E .
C1300 ABS Hydraulic Pump Motor Circuit Failure ABS Go to Pinpoint Test F .
C1805 Mismatched PCM and/or ABS/TC Module ABS CHECK the part numbers. INSTALL the correct module. REFER to ELECTRONIC ENGINE CONTROLS article for the PCM or Anti-Lock Brake System (ABS) Module  for the ABS module. Verify correct module and tire size configuration.
U0073 Control Module Communication Bus Off ABS REFER to MODULE COMMUNICATIONS NETWORK article.
U1900 CAN Communication Bus Fault - Receive Error ABS REFER to MODULE COMMUNICATIONS NETWORK article.
U2023 Fault Received From External Node ABS If any other DTCs are present, DIAGNOSE those first. 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 .
U2050 No Application Present ABS 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 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 ABS 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 K .
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