DTC Detection Logic

WARNING: This page is about a different car, the 2012 Infiniti M35h. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

If DTC P31AB is displayed with DTC UXXXX, first perform the trouble diagnosis for DTC UXXXX. Refer to "DTC INDEX ".
If DTC P31AB is displayed with DTC P0A1D, first perform the trouble diagnosis for DTC P0A1. Refer to "DTC LOGIC ".

DTC No.	Trouble diagnosis name (Trouble diagnosis content)	DTC detecting condition	Possible cause
P31AB	COMMUNICATION ERROR (Lost communication with electrically-driven intelligent brake unit)	When HPCM is not transmitting or receiving CAN communication signal with electrically-driven in- Electrically-driven intelligent brake unit	Electrically-driven intelligent brake unit.