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DTC U0401 00: Can System Communication Error: Notes

DTC U0401 00 DETECTION CONDITION AND POSSIBLE CAUSE

DTC U0401:00  CAN system communication error 
DETECTION CONDITION 
  • Error detected in signal from PCM via CAN communication
FAIL-SAFE FUNCTION 
  • Vehicle speed signal malfunction
    • Control is maintained by gradually changing the controlled vehicle speed and setting it to 100 km/h {62.1 mph} 
    • Power steering malfunction indicator light: Illuminated
  • Engine speed signal malfunction
    • Control enabled
    • Power steering malfunction indicator light; Not illuminated
POSSIBLE CAUSE 
  • PCM malfunction
SYSTEM WIRING DIAGRAM  -