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Home >> Hyundai >> 2021 >> Santa Fe Calligraphy, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis - 2.5T (Except HEV) (11 Of 16) >> DTC P0A1A-07: Generator Control Module >> Component Inspection >> Notes

Component Inspection: Notes

  1. Ignition SW "OFF"
  2. Connect VMI to GDS and set up an oscilloscope as follow (2-channel):

    Channel A (+): LIN terminal of alternator

    Channel A (-): Ground

  3. Engine "ON".

    Specification:  Refer to Signal Waveform & Data 

  4. Is the measured value within specification?

    YES 

    • Fault is intermittent caused by poor contact in the sensor's and/or ECM's connector or was repaired and ECM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.

    NO 

    • Carefully re-do this troubleshooting guide steps.
    • If no problems were found with the circuits or connectors, replace the alternator and go to "Verification Of Repair ".
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