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Home >> Ford >> 2003 >> Cutaway 7.3 F >> Repair and Diagnosis >> External Pages >> Different car >> Section 2500 (Information Center - Instrumentation, Message Center And Warning Chimes -- F250-F550 Super Duty) >> Diagnosis And Testing >> Instrumentation, Message Center and Warning Chimes >> Pinpoint Tests >> Pinpoint Test BF: DTC U0121 >> Pinpoint Test Bf: DTC U0121

Pinpoint Test Bf: DTC U0121

WARNING: This page is about a different car, the 2010 Ford Pickup, 2010 Ford F550 Super Duty, 2010 Ford F450 Super Duty, and 2010 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
  1. BF1 VERIFY THE CUSTOMER CONCERN 
    • Ignition ON.
    • Verify that there is an observable symptom present.
    • Is an observable symptom present? 
    • Yes:  GO to BF2  .
    • No:  The system is operating normally at this time. The DTC may have been set due to high network traffic or an intermittent fault condition.
  2. BF2 CHECK THE COMMUNICATION NETWORK 
    • Enter the following diagnostic mode on the scan tool: Network Test.
    • Carry out the network test.
    • Does the ABS module pass the network test? 
  3. BF3 RETRIEVE THE RECORDED DTCs FROM THE IC SELF-TEST 
    • Check for recorded IC  DTCs from the self-test.
    • Is DTC B1317 or DTC B1318 recorded? 
  4. BF4 RECHECK THE IC DTCs 
    • Clear the DTCs. Repeat the IC  self-test.
    • Is DTC U0121 still present? 
    • Yes:  INSTALL a new ABS module. REFER to VEHICLE DYNAMIC SYSTEMS .

      CLEAR the DTCs. REPEAT the IC  self-test.

      If DTC U0121 is still present, INSTALL a new IC  . REFER to INSTRUMENT CLUSTER (IC) . TEST the system for normal operation.

    • No:  The system is operating correctly at this time. The DTC may have been set due to high network traffic or an intermittent fault condition.
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