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Home › Hummer › 2009 › H3 Base, Standard › Repair and Diagnosis › Electrical › Charging Systems › Battery, Charging System And Starting System › 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 0%.
  2. Engine running, observe the scan tool ECM GEN-F Terminal Signal parameter. The parameter should read between 5 and 99%.
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