DTC U0402-00: Abnormal Message From Transmission/Transaxle: Notes

DTC	U0402:00	Abnormal message from transmission/transaxle
DETECTION CONDITION		The DSC HU/CM received error signals from the transmission/transaxle for 1 s or more with the ignition switched ON (engine off or on).
FAIL-SAFE FUNCTION		Illuminates the TCS/DSC indicator light and smart city brake support (SCBS) indicator light (amber)^1 . Tire pressure monitoring system warning light^1 illuminates after flashes. Inhibits the TCS, DSC, hill launch assist (HLA), TPMS^1 , and smart city brake support (SCBS) ^1 controls. ^*1 : If equipped.
POSSIBLE CAUSE		The transmission/transaxle could not send a normal signal temporarily. (DTCs are stored in the TCM.) TCM malfunction
SYSTEM WIRING DIAGRAM		Not applicable