System Description (M/T Models)

System Diagram

Courtesy of NISSAN NORTH AMERICA, INC.

Component	Function
BCM	BCM controls starter relay.
IPDM E/R	CPU inside IPDM E/R controls starter control relay.
Starter motor	Refer to Starter motor .
Clutch interlock switch	Supplies power to starter control relay and starter relay when the clutch pedal is depressed.

System Description

When clutch pedal is depressed, power is supplied to starter relay and starter control relay by clutch interlock switch. And BCM and IPDM E/R (CPU) detect clutch pedal depress condition by the inputted signal.
When starter operating condition is satisfied, IPDM E/R turns starter control relay ON by starter control relay control signal.
When engine cranking condition is satisfied, BCM turns starter relay ON by starter relay control signal.
Then battery power is supplied to starter motor ("S" terminal) through starter control relay and starter relay. And IPDM E/R (CPU) detect starter relay condition by the inputted signal.