System Description - With Idle Start/Stop System

SYSTEM DIAGRAM 

Courtesy of NISSAN

System Description 

• "B" terminal receives the battery power via engine restart bypass relay.
• When selector lever is "P" or "N", power is supplied to starter control relay by transmission range switch.
• When starter operating condition is satisfied, IPDM E/R turns starter relay ON by starter relay control signal.
• When engine cranking condition is satisfied, BCM turns starter control relay ON by starter control relay control signal.
• Then battery power is supplied to starter motor ("S" terminal) through starter control relay and starter relay.