Run the eeprom command to see your current settings. If the console setting is set to text then you must change it to ttya.
root@earth> eeprom
ata-dma-enabled=1
atapi-cd-dma-enabled=0
ttyb-rts-dtr-off=false
ttyb-ignore-cd=true
ttya-rts-dtr-off=false
ttya-ignore-cd=true
ttyb-mode=9600,8,n,1,-
ttya-mode=9600,8,n,1,-
lba-access-ok=1
prealloc-chunk-size=0x2000
keyboard-layout=US-English
console=text
ata-dma-enabled=1
atapi-cd-dma-enabled=0
ttyb-rts-dtr-off=false
ttyb-ignore-cd=true
ttya-rts-dtr-off=false
ttya-ignore-cd=true
ttyb-mode=9600,8,n,1,-
ttya-mode=9600,8,n,1,-
lba-access-ok=1
prealloc-chunk-size=0x2000
keyboard-layout=US-English
console=text
Change the setting with the command below.
root@earth> eeprom console=ttya
The server must be rebooted for the change to take affect.
After the reboot test to see if it works.
root@earth> ssh root@ILOM
-> start /SP/console
-> start /SP/console
Reference
Document ID 1448462.1 on the Oracle Support Site.
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