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P0620 - Generator Control Circuit

P0620 - GENERATOR CONTROL CIRCUIT

Description:  The powertrain control module (PCM) reads the GENLI and sends a DTC through the network when the signal frequency of GENLI indicates a concern.
Possible Causes: 
  • I-line control (ILC) circuit short to ground
  • ILC circuit short to voltage
  • ILC circuit open
  • GENLI circuit short to voltage or ground
  • GENLI circuit open
  • B+ 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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