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Home >> Hyundai >> 2004 >> Elantra GLS, Standard >> Repair and Diagnosis >> Accessories & Equipment >> Anti-Theft Systems >> Immobilizer Control System >> Immobilizer Control System >> Troubleshooting >> Diagnostic Trouble Code Chart >> DTC P1801: Invalid Transponder Data >> Inspection Procedure

Inspection Procedure

  1. PROBLEM VERIFICATION
    1. Connect the hi-scan (pro) to data link connector.
    2. Turn the ignition switch to ON and verify the DTC "P1801" is displayed.
    3. Erase the DTC "P1801" with the hi-scan (pro) and then monitor again.

    Is the same code displayed? 

    1. Yes: Go to next step.
    2. No: Problem is intermittent and engine control module memory was not cleared.
  2. KEY TEACHING PROCEDURES
    1. The key teaching is done after replacing a defective ECM or for providing of additional keys to the vehicle owner.
    2. Connect the hi-scan (pro) to data link connector.
    3. Turn the ignition switch to ON and select "TEACHING" mode of immobilizer system on the hi-scan (pro).
    4. Input the pin code which consists of 6 digits.
      NOTE: Because the pin code is security code, contact authorized HMC service staff to know the pin code.
    5. If incorrect pin code is inputted for 3 consecutive times, ECM should disallow key teaching function for 1 hours.
    6. If the data is correct, the key teaching is completed.

    Is the key taught completely? 

    1. Yes: Go to next step.
    2. No: Check for these problems:
      • Storage of invalid data in transponder.
      • Different kind of transponder.
      • Omitted transponder in the key.
  3. CHECK IF DTC "P1801" IS DISPLAYED AGAIN
    1. Connect the hi-scan (pro) to data link connector.
    2. Turn the ignition switch to ON and verify the DTC "P1801" is displayed.

    Is the same code displayed? 

    1. Yes: Go to next step.
  4. FAULTY TRANSPONDER KEY

    Replace the key set assembly and key teaching must be done.