All codes
Service call
SC327
TD sensor output error
BPCU / developer
Level B — stop, power-cycle may clear
First check
Same as SC325. If it appears immediately after a PCU swap, init was skipped.
What it means
TD sensor Vt is out of the absolute window (not just failed auto-adjust).
Likely causes
- TD sensor
- Developer
- Harness
On-site steps
Parts to have on the truck
- Development unit / PCU
Related procedures
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.