LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Pontiac >> 2010 >> Solstice Base, 2D Convertible, Standard >> Repair and Diagnosis >> Electrical >> Charging Systems >> Battery, Charging System And Starting System >> Diagnostic Information and Procedures >> DTC P0621 >> Circuit/System Testing >> LNF Engine
April 5, 2026: LEMON Manuals is launched! Read the announcement.

LNF Engine

  1. Verify that a test lamp illuminates between the generator B+ terminal A X2 and ground.
    • If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
  2. Ignition OFF, disconnect the harness connector X1 at the generator.
  3. Ignition ON, test for less than 1 V between the generator turn on signal circuit terminal B X1 and ground.
    • If greater than the specified range, test the generator turn on signal circuit for a short to voltage. If the circuit tests normal, replace the ECM.
  4. Engine running, test for greater than 3.5 V between the generator turn on signal circuit terminal B and ground.
    • If less than the specified range, test the generator turn on signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the ECM.
  5. If the circuit tests normal, test or replace the generator.
scientia non olet · About LEMON Manuals