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Pinpoint Test At: DTC U0257:00

  1. AT1 VERIFY THE CUSTOMER CONCERN 
    • Ignition ON.
    • Verify there is an observable symptom present.
    • Is an observable symptom present? 
    • Yes  : GO to AT2.
    • 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. AT2 CHECK THE COMMUNICATION NETWORK 
    • Ignition ON.
    • Enter the following diagnostic mode on the scan tool: Network Test.
    • Carry out the network test.
    • Does the FCDIM pass the network test? 
  3. AT3 RETRIEVE THE RECORDED DTCs FROM THE FCDIM SELF-TEST 
    • Check for recorded DTCs from the FCDIM self-test.
    • Is DTC U3006:16 or DTC U3006:17 recorded? 
  4. AT4 RETRIEVE THE RECORDED DTCs FROM THE IPC SELF-TEST 
    • Check for recorded DTCs from the IPC self-test.
    • Is DTC U3006:16 or DTC U3006:17 recorded? 
  5. AT5 RECHECK THE IPC DTCs 
    • Clear the DTCs.
    • Wait 10 seconds.
    • Repeat the IPC self-test.
    • Is DTC U0257:00 still present? 
    • Yes  : GO to AT6.
    • 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.
  6. AT6 CHECK FOR DTC U0212:87 SET IN OTHER MODULES 
    • Clear all DTCs.
    • Ignition OFF.
    • Ignition ON.
    • Wait 10 seconds.
    • Enter the following diagnostic mode on the scan tool: Self-Test.
    • Retrieve the continuous memory DTCs from all modules.
    • Is DTC U0257:00 set in the Audio Front Control Module (ACM)? 
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