All codes
Service call
SC392
TD sensor initial setting failed
BPCU / developer
Level B — stop, power-cycle may clear
First check
Skipped developer init after a PCU/dev swap is the classic. Run SP3-002.
What it means
TD sensor initial setting failed. Confirm the exact subcode against the FSM for this serial — meaning can shift by generation.
Likely causes
- Skipped developer init after a PCU/dev swap is the classic. Run SP3-002.
On-site steps
Parts to have on the truck
- Development unit
SP / reset
SP3-002 then SP3-011 — not SP5-810.
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.