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Home >> Ford >> 2006 >> Explorer 4.6 8, RWD >> Repair and Diagnosis >> Brakes >> Traction Control >> Anti-Lock Brake System >> Diagnosis And Testing >> Anti-Lock Control >> Inspection and Verification

Inspection and Verification

NOTE: If a new anti-lock brake system (ABS) module is installed, it must be configured. Follow the diagnostic tool directions.
  1. Verify the customer concern.
  2. Verify the stoplamps operate 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 . If the stoplamps operate correctly, proceed to the next step.
  3. Verify that the PRNDL operates correctly on the instrument cluster. If the PRNDL does not operate correctly, refer to AUTOMATIC TRANSAXLE/TRANSMISSION - 5R55S . If the PRNDL operates correctly, proceed to the next step.
  4. Visually inspect for obvious signs of mechanical or electrical damage.
    VISUAL INSPECTION CHART

    Mechanical Electrical
    • Wheel speed sensor ring
    • Hydraulic control unit (HCU)
    • Base brake system
    • Brake booster vacuum hose
    • Tire size
    • Suspension components
    • Steering components
    • Battery junction box (BJB) fuse(s):
      • 6 (40A)
      • 33 (30A)
    • Central junction box (CJB) fuse(s):
      • 18 (10A)
      • 22 (15A)
    • ABS module
    • Stoplamp switch
    • Steering wheel rotation sensor
    • Brake booster solenoid
    • Brake booster release switch
    • Brake pressure transducer (integral to the ABS module)
    • Sensor cluster (also called accelerometer)
    • Brake fluid level switch
    • Circuitry
    • Stability traction control switch
    • Wheel speed sensor
  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.
    NOTE: The vehicle must be at a complete standstill when carrying out the self-test. Any movement of the vehicle during the self-test may result in false DTCs being set.
  7. Carry out the diagnostic tool data link test. If the diagnostic tool responds with:
    • CAN circuit fault or 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 A .
    • 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  to continue diagnosis.
  9. If no DTCs related to the concern are retrieved, GO to SYMPTOM CHART .
    NOTE: Always retrieve the continuous DTCs after running the self-test.
    NOTE: For a complete master list of DTCs, refer to MULTIFUNCTION ELECTRONIC MODULES .
    NOTE: If DTC B2900, C1805 and U1900 are set at the same time, diagnose the concern for U1900 first.
ANTI-LOCK BRAKE SYSTEM (ABS) MODULE DIAGNOSTIC TROUBLE CODE (DTC) INDEX

DTC Description Source Action
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, INSTALL a new module. REFER to ANTI-LOCK BRAKE SYSTEM (ABS) MODULE . REPEAT the self-test.
B1483 Brake Pedal Input Circuit Failure ABS Module GO to PINPOINT TEST B .
B1676 Battery Pack Voltage Out of Range ABS Module GO to PINPOINT TEST C .
B2477 Module Configuration Failure ABS Module Follow the diagnostic tool directions for the configuration procedure.
B2741 Sensor Cluster Is Defective ABS Module GO to PINPOINT TEST H .
B2900 VIN Mismatched (normally set when a new ABS module is installed) ABS Module VERIFY that the module has the correct as-built data. CHECK for correct PCM configuration using the diagnostic tool. CONFIGURE the component as necessary. REFER to ELECTRONIC ENGINE CONTROLS for the PCM. CLEAR the DTC. REPEAT the self-test.
C1095 ABS Hydraulic Pump Motor Circuit Failure ABS Module GO to PINPOINT TEST D .
C1145 Wheel Speed Sensor RF Input Circuit Failure ABS Module GO to PINPOINT TEST E .
C1155 Wheel Speed Sensor LF Input Circuit Failure ABS Module GO to PINPOINT TEST E .
C1165 Wheel Speed Sensor RR Input Circuit Failure ABS Module GO to PINPOINT TEST E .
C1175 Wheel Speed Sensor LR Input Circuit Failure ABS Module GO to PINPOINT TEST E .
C1233 Wheel Speed LF Input Signal Missing ABS Module GO to PINPOINT TEST F .
C1234 Wheel Speed RF Input Signal Missing ABS Module GO to PINPOINT TEST F .
C1235 Wheel Speed RR Input Signal Missing ABS Module GO to PINPOINT TEST F .
C1236 Wheel Speed LR Input Signal Missing ABS Module GO to PINPOINT TEST F .
C1277 Steering Wheel Angle 1 and 2 Circuit Failure ABS Module GO to PINPOINT TEST G .
C1278 Steering Wheel Angle 1 and 2 Signal Faulted ABS Module GO to PINPOINT TEST G .
C1279 Yaw Rate Sensor Circuit Failure ABS Module GO to PINPOINT TEST H .
C1280 Yaw Rate Sensor Signal Fault ABS Module GO to PINPOINT TEST H .
C1281 Lateral Accelerometer Circuit Failure ABS Module GO to PINPOINT TEST H .
C1282 Lateral Accelerometer Signal Fault ABS Module GO to PINPOINT TEST H .
C1285 Booster Solenoid Circuit Failure ABS Module GO to PINPOINT TEST I .
C1287 Booster Pedal Force Switch Circuit Failure ABS Module GO to PINPOINT TEST J .
C1288 Brake Pressure Transducer Input Circuit Failure ABS Module CLEAR the DTCs. REPEAT the self-test. If DTC C1287 is present, make sure all HCU and ABS module fasteners are tightened to their correct torque specification. If all fasteners are tightened to their correct torque specification, INSTALL a new ABS module. REFER to ANTI-LOCK BRAKE SYSTEM (ABS) MODULE .
C1440 Pressure Transducer Input Circuit Failure ABS Module CLEAR the DTCs. REPEAT the self-test. If DTC C1287 is present, INSTALL a new ABS module. REFER to ANTI-LOCK BRAKE SYSTEM (ABS) MODULE .
C1470 TCS Function Temperature Disabled (the brake fluid temperature is above a pre-set limit) ABS Module CLEAR the DTC. VERIFY ABS operation.
C1516 Roll Rate Signal Fault ABS Module GO to PINPOINT TEST H .
C1517 Roll Rate Sensor Circuit Fault ABS Module GO to PINPOINT TEST H .
C1805 Mismatched PCM and/or ABS Module ABS Module CHECK for correct PCM and ABS module configurations using the diagnostic tool. CONFIGURE the component as necessary. FOLLOW the diagnostic tool directions for the ABS module configuration or REFER to ELECTRONIC ENGINE CONTROLS for the PCM. CLEAR the DTC. REPEAT the self-test.
C1963 Stability Control Inhibit Warning ABS Module This DTC is for information only. CLEAR the DTC. REPEAT the self-test.
C1991 Module Calibration Failure ABS Module CLEAR the DTC. REPEAT the self-test. If DTC C1991 is present, INSTALL a new ABS module. REFER to ANTI-LOCK BRAKE SYSTEM (ABS) MODULE .
C1996 Active Yaw Control Disabled ABS Module This DTC is set if the stability assist system is activated for 15 seconds of continuous operation. CHECK for any major chassis modifications, gross suspension misalignment or other items that can alter the vehicle tracking dynamics. CLEAR the DTC. REPEAT the self-test.
C2769 Longitudinal Acceleration Sensor Circuit Failure ABS Module GO to PINPOINT TEST H .
C2770 Longitudinal Acceleration Sensor Signal Fault ABS Module GO to PINPOINT TEST H .
C2777 Sensor Cluster Bus Failure ABS Module GO to PINPOINT TEST H .
C2778 Sensor Cluster Power Supply Failure ABS Module GO to PINPOINT TEST H .
U1900 CAN Communication Bus Fault-Receive Error Network Fault REFER to MODULE COMMUNICATIONS NETWORK .
U1901 CAN Network #2 Communication Bus Fault-Receive Error Network Fault GO to PINPOINT TEST H .
U2023 Fault Received From External Node Network Fault REFER to MODULE COMMUNICATIONS NETWORK .
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