Nissan Sentra Service Manual: Starter motor drive control

Nissan Sentra Service Manual / Engine / Engine control system / System / Starter motor drive control

STARTER MOTOR DRIVE CONTROL : System Description

SYSTEN DIAGRAM

*1: CVT models

*2: M/T models

INPUT/OUTPUT SIGNAL CHART

Sensor	Input signal to ECM		ECM function	Actuator
Crankshaft position sensor (POS)	Engine speed Piston position		Starter motor drive control	BCM IPDM E/R (Starter relay & starter control relay)
Camshaft position sensor (PHASE)
Engine coolant temperature sensor	Engine coolant temperature
Accelerator pedal position sensor	Accelerator pedal position
Transmission range switch (CVT)	Gear position
Park/ Neutral position switch (M/T)	Gear position
Stop lamp switch	Brake pedal position
Combination meter	CAN communication	Vehicle speed signal

SYSTEM DESCRIPTION

When rapid deceleration occurs during engine runs or idle speed decreases due to heavy load conditions, ECM detects a decrease in idle speed and restarts the engine to secure reliability in handleability by transmitting a cranking request signal to IPDM E/R for activating the starter motor under the following conditions:

Selector lever: Other than P and N (CVT models)
Shifter lever: Other than neutral position (M/T models)
Idle switch: ON (Accelerator pedal not depressed)
Brake switch: ON (Brake pedal depressed)

ECM transmits a control signal to IPDM E/R via BCM by CAN communication.

IPDM E/R detects an operating state of the starter motor relay and the starter motor control relay and transmits a feed back signal to ECM via CAN Communication.

Cooling fan control

SYSTEM DIAGRAM SYSTEM DESCRIPTION ECM controls cooling fan speed corresponding to vehicle speed, engine coolant temperature, refrigerant pressure, air conditioner ON signal. Then control syst ...

Evaporative emission system

EVAPORATIVE EMISSION SYSTEM : System Description SYSTEM DIAGRAM INPUT/OUTPUT SIGNAL CHART Sensor Input signal to ECM ECM function Actuator Crankshaft position sensor (P ...

Other materials:

U1000 Can comm circuit
Description CAN (Controller Area Network) is a serial communication line for real-time application. It is an on-vehicle multiplex communication line with high data communication speed and excellent malfunction detection ability. Many electronic control units are equipped onto a vehicle, an ...

Tire Pressure Monitoring System (TPMS)
This vehicle is equipped with the Tire Pressure Monitoring System (TPMS). It monitors tire pressure of all tires except the spare. When the low tire pressure warning light is lit, and the CHECK TIRE PRES warning message is displayed in the odometer, one or more of your tires is significantly u ...

System description
System Can communication system Can communication system : system description CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle multiplex communication line with high data communication speed and excellent error detection ability. Man ...