Ricoh G188 Service Manual page 703

These SPs display the amount of the remaining current toner for each
color.
8 891 1 BK
8 891 2 Y
8 891 3 M
8 891 4 C
Page/Toner_prev1
8 901
These SPs display the amount of the remaining previous toner for each
color.
8 901 1 BK
8 901 2 Y
8 901 3 M
8 901 4 C
Page/Toner_prev2
8 911
These SPs display the amount of the remaining 2nd previous toner for
each color.
8 911 1 BK
8 911 2 Y
8 911 3 M
8 911 4 C
Cvr Cnt/Total
8 921
Displays the total coverage and total printout number for each color.
SM Appendix
*ENG
[0 to 9999999/ 0 / 1]
*ENG [0 to 9999999/ 0 / 1]
*CTL
[0 to 9999999/ 0 / 1]
8-291
Engine Service Mode
G188/G189