You can start IBM Navigator for i system jobs by
STRTCPSVR SERVER(*HTTP) HTTPSVR(*ADMIN) ADMIN HTTP jobs should be running then
WRKACTJOB SBS(QHTTPSVR) JOB(ADMIN)and IBM Navigator for i should be accesible on http://your_system:2001
http logs are on /QIBM/UserData/HTTPA/admin/logs (HTTPAdmin.log, error_log)