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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%.
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