All codes
Service call
SC344
Magenta developer sleeve motor lock
BPCU / developer
Level B — stop, power-cycle may clear
First check
M sleeve lock. Same as 343 for magenta.
What it means
Magenta developer sleeve motor lock. Confirm the exact subcode against the FSM for this serial — meaning can shift by generation.
Likely causes
- M sleeve lock. Same as 343 for magenta.
On-site steps
Parts to have on the truck
- M development motor
- M PCU
Related codes
Confirm the subcode and part number in the FSM for this serial. Raicoh is a field companion, not a replacement for the book.