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P1246 - Alternator Load Input

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P1246 - ALTERNATOR LOAD INPUT

Description:  The powertrain control module (PCM) monitors the generator load from the generator/regulator in the form of frequency. The frequency range is determined by the temperature of the voltage regulator, where 97% indicates a full load, and less than 6% indicates no load.
Possible Causes: 
  • GENLI circuit shorted to voltage or ground
  • GENLI circuit open
  • GENRC circuit shorted to power or ground
  • GENRC circuit open
  • ILC circuit shorted to voltage or ground
  • ILC circuit open
  • Battery-sense circuit open
  • Generator drive mechanism
  • Damaged generator/regulator assembly
  • Damaged PCM
Diagnostic Aids:  Verify the battery voltage is 14.5 volts.
Verify the generator/regulator has the correct part number.
Application  Key On Engine Off  Key On Engine Running  Continuous Memory 
All refer to PINPOINT TEST HY .
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