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VSA activation indicator does not go off, and no DTCs are stored

Diagnostic procedure
  1. Update the VSA modulator-control unit if it does not have the latest software, or substitute a known-good VSA modulator-control unit, then retest. If it is OK, the VSA modulator-control unit was updated, troubleshooting is complete. If the VSA modulator-control unit was substituted, replace the original VSA modulator-control unit.