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Pinpoint Test Bk: DTC U0121:00

WARNING: This page is about a different car, the 2011 Mercury Milan, 2011 Lincoln MKZ, and 2011 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.
  1. BK1 VERIFY THE CUSTOMER CONCERN 
    • Ignition ON.
    • Verify that there is an observable symptom present.
    • Is an observable symptom present? 
    • Yes  : GO to BK2.
    • 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. BK2 CHECK THE COMMUNICATION NETWORK 
    • Ignition ON.
    • 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. BK3 RETRIEVE THE RECORDED DTCs FROM THE IPC SELF-TEST 
    • Check for recorded DTCs from the IPC  self-test.
    • Is DTC U3003:16 or DTC U3003:17 recorded? 
  4. BK4 RECHECK THE IPC DTCs 
    • Clear the DTCs. Repeat the IPC  self-test.
    • Is DTC U0121:00 still present? 
    • Yes  : INSTALL a new ABS module. REFER to ANTI-LOCK BRAKE SYSTEM (ABS) & STABILITY CONTROL SYSTEM (SCS) article. CLEAR the DTCs. REPEAT the IPC  self-test. If DTC U0121:00 is still present, INSTALL a new IPC  . REFER to INSTRUMENT PANEL CLUSTER (IPC)  in this service information. 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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