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DTC U0401: 00 Abnormal Message From Pcm: Notes

DTC U0401:00 (DSC) DETECTION CONDITION AND POSSIBLE CAUSE

DTC  U0401:00  Abnormal message from PCM 
DETECTION CONDITION 
  • Correct data cannot be received from PCM
FAIL-SAFE FUNCTION 
  • Illuminates the TCS/DSC indicator light*1 and master warning light*1*2 .
  • Tire pressure monitoring system warning light illuminates after flashes. (Not illuminated/flashed depending on malfunction content.)
  • Inhibits the TCS*3 , DSC*3 , roll over mitigation (ROM)*3 , vehicle roll prevention function*3*4 , hill launch assist (HLA)*3 , TPMS*3 , and smart city brake support (SCBS)*2*3 controls.

*1 : Not illuminated depending on malfunction content.
*2 : Vehicles with smart city brake support (SCBS)
*3 : Enabled depending on malfunction content.
*4 : ATX only
POSSIBLE CAUSE 
  • PCM malfunction
SYSTEM WIRING DIAGRAM  -
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