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Pinpoint Test Bk: DTC U0121:00

  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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