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:

Symptom diagnosis
OVERHEATING CAUSE ANALYSIS Troubleshooting Chart Symptom Check items Cooling system parts malfunction Poor heat transfer Water pump malfunction Worn or loose drive belt вЂ” Thermostat stuck closed Engine coolant circulation Da ...

Air cleaner and air duct
Exploded View Mass air flow sensor Mass air flow gasket Clamp Air duct (suction side) Resonator Clamp PCV hose Clamp Clamp Air cleaner cover Mounting rubber Air cleaner filter Air cleaner body Air duct inlet (lower) Air duct inlet (upper) Mounting rubber Brack ...

Compass display (if so equipped)
This unit measures terrestrial magnetism and indicates heading direction of vehicle. With the ignition switch in the ON position, press the button as described in the chart below to activate various features of the automatic antiglare rearview mirror. For more information about the au ...