DTC B1987: Sub Micom Failed: DTC Detecting Condition

DTC DETECTING CONDITION CHART

Item	Detecting Condition	Possible Cause
DTC Strategy	NEC MCU Communication Check	Short to ground/power or open in communication circuit of NEC MCU inside PDM Replace PDM (In case It is unable to verify the cause.)
Enable Conditions	PDM power on
Threshold Value	Communication error
Diagnostic Time	Immediately
DTC Erasing Time	DTC is erased immediately after trouble fixed.