RaicohField service
All codes

Service call

SC640

Engine I/F error

BCommunications

Level B — stop, power-cycle may clear

First check

Firmware pair and I/F cable. Cousin of 670/672.

What it means

Engine interface reported a protocol / timeout error.

Likely causes

  • Firmware
  • I/F
  • IOB
  • Controller

On-site steps

Parts to have on the truck

  • Engine I/F
  • IOB
  • Controller

Related codes

SC601SC670SC672

Confirm the subcode and part number in the FSM for this serial. Raicoh is a field companion, not a replacement for the book.