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Home >> Chevrolet >> 2009 >> Uplander Base, 3.9 M >> Repair and Diagnosis >> Electrical >> Charging Systems >> Engine Electrical >> Diagnostic Information and Procedures >> DTC P0622 >> Circuit/System Verification

Circuit/System Verification

  1. Ignition ON, engine OFF, observe the scan tool ECM GEN-F Terminal Signal parameter. The parameter should read less than 5%.
  2. Engine running, observe the scan tool ECM GEN-F Terminal Signal parameter. The parameter should read greater than 5%.