General Information

Power Distribution Module
B1987 Sub Micom Failed - General Information

Component Location





General Description

This is DTC which is related with communication error between PDM and other units.
** Body CAN communication Control Units : IPM(Intelligent integrated Platform Module), CLU(Cluster), PDM(Power Distribution Module), SMK(Smart Key), RPAS(Rear Parking Assist System).
** LIN communication Control Units : IPM(Intelligent integrated Platform Module), DDM(Drive Door Module), ADM(Assist Door Module), IMS(Integrated Memory System-PSM.
* CAN (Controller Area Network) : CAN is serial bus communication type which links not only communication system but also control units each other.
*2 LIN (Local Interconnect Network) : LIN is serial communication type which is used in electrical control system. (This is less expensive.)






DTC Description

This code reports the malfunction of NEC MCU inside PDM. This is the case which there is the NEC MCU communication error.

DTC Detecting Condition





Diagnostic Circuit Diagram










Signal Waveform & Data








Fig.1) Signal waveform of CAN Low and HIGH
Fig.2) CAN BUS VOLTAGE LEVEL (LOW SPEED CAN)