Nissan X-Trail 32. Manual — part 930
SYSTEM
EC-849
< SYSTEM DESCRIPTION >
[R9M]
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Input/
Output
Transmits/Receives component
Signal name
Description
Input
Crankshaft position sensor
Crankshaft position sensor signal
Detects an engine speed.
Engine coolant temperature
sensor
Engine coolant temperature sensor signal
Detects an engine coolant tem-
perature.
Clutch pedal position switch
Clutch pedal position switch signal
Detects the clutch pedal is de-
pressed (not released).
Clutch pedal interlock switch
Clutch pedal interlock switch signal
Detects the clutch pedal is de-
pressed (fully depressed).
Neutral position switch
Neutral position switch signal
Detects the neutral position.
Atmospheric pressure sensor
(integrated in ECM)
Atmospheric pressure sensor signal
Detects an atmospheric pres-
sure.
IPDM E/R
CAN communica-
tion
Stop/Start permit signal
Detects the IPDM E/R is ready to
operate the stop/start system.
For details, refer to
ERGY MANAGEMENT SYS-
TEM : System Description"
Battery current signal
Detects battery current.
Neutral position switch signal
Detects the neutral position.
Hood switch signal
Detects engine hood status.
Battery current sensor malfunc-
tion signal
Detects the battery current sen-
sor is normal.
BCM
CAN communica-
tion
Ignition switch status signal
Detects ignition switch status.
Door switch signal
Detects the status of driver side
door.
Stop/Start OFF switch signal
Detects stop/start OFF switch
status.
ABS actuator and electric unit
(control unit)
CAN communica-
tion
Vehicle speed signal
Detects vehicle speed.
Brake booster pressure sensor
signal
Detects a pressure in brake
booster.
ABS operation signal
Detects ABS operation.
ESP operation signal
Detects ESP operation.
EPS control unit
CAN communica-
tion
EPS torque signal
Detects an operational state of
EPS system.
Stop/Start inhibit signal
Receives the intelligent parking
assist status signal sent from the
around view monitor control unit
through the EPS control unit.
A/C auto amp.
CAN communica-
tion
Stop/Start permit signal
Detects the air conditioning sys-
tem is ready to operate the stop/
start system. For details, refer to
HAC-36, "STOP/START SYS-
TEM : System Description"
Combination meter
CAN communica-
tion
Seat belt buckle switch signal
Detects driver is sitting on the
driver seat.
DC/DC converter
LIN communication
Operation status signal
Detects an operational state of
DC/DC converter.
Diagnosis signal
Detects DC/DC converter mal-
function.
EC-850
< SYSTEM DESCRIPTION >
[R9M]
SYSTEM
SYSTEM DESCRIPTION
The stop/start system enables the engine to automatically stop/restart with a simple operation and reduces
unnecessary idling during stoplight or traffic congestion to improve fuel economy, reduce exhaust gas, and
minimize noise.
ECM detects a vehicle condition, engine condition and driver
′
s operation condition based on signals sent from
each unit and the sensors to comprehensively control the stop/start system.
The operation condition of the stop/start system is indicated by the stop/start indicator lamp on the combina-
tion meter and showing on the information display (dot matrix information display). (Refer to
.) If a malfunction is detected in the stop/start system, the system control is automatically
deactivated and the malfunction is alerted to the driver by blinking the stop/start indicator lamp and showing
the status on the information display (dot matrix information display). When a driver
′
s operation is judged as
dangerous one during the stop/start system operation, the stop/start indicator lamp blinks at a high speed and
the status is shown on the information display (with dot matrix information display). The buzzer mounted on
the combination meter sounds simultaneously to warn the driver of the dangerous operation.
NOTE:
Starting the engine from stop/start system operation is regarded as “Restart”.
Output
Around view monitor control unit
CAN communica-
tion
Stop/Start status signal
Transmits a stop/start status sig-
nal
BCM
CAN communica-
tion
Stop/Start status signal
Transmits a stop/start status sig-
nal
ABS actuator and electric unit
(control unit)
CAN communica-
tion
Stop/Start status signal
Transmits a stop/start status sig-
nal
EPS control unit
CAN communica-
tion
Stop/Start status signal
Transmits a stop/start status sig-
nal
EPS assist request signal
Transmits EPS assist permit/in-
hibit signal.
A/C auto amp.
CAN communica-
tion
Stop/Start status signal
Transmits a stop/start status sig-
nal
Combination meter
CAN communica-
tion
Stop/Start status signal
Transmits a stop/start status sig-
nal
Stop/Start indicator lamp request
signal
Transmits request signal which
turn ON the stop/start indicator
lamp.
DC/DC converter
DC/DC converter operation check signal
Check DC/DC converter opera-
tion status.
Input/
Output
Transmits/Receives component
Signal name
Description
SYSTEM
EC-851
< SYSTEM DESCRIPTION >
[R9M]
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BASIC OPERATION
FUNCTION DESCRIPTION
When the stop/start system readiness conditions are satisfied while the vehicle is moving, the system is ready.
When the stop/start system operation conditions are satisfied while the vehicle is in a stop condition, the
engine is stopped.
During stop/start system operation, stopping time, the amount of fuel saved by the stop/start system and CO
2
saved information are indicated on the combination meter. (With dot matrix information display. Refer to
71, "INFORMATION DISPLAY : System Description"
.)
JSBIA3733GB
EC-852
< SYSTEM DESCRIPTION >
[R9M]
SYSTEM
When the engine restart conditions are satisfied, ECM activates the engine restart relay, the engine restart
bypass control relay, and the engine restart bypass relay to restart the engine. And the DC/DC converter
boosts the voltage during cranking to protect the electrical equipment from low voltage.
After restarting the engine, the stop/start indicator lamp and the indication on the information display turn OFF.
NOTE:
• When engine restart conditions are satisfied during the electric parking brake operation, ECM performs the
engine restart after the completion of the electric parking brake operation. This may cause delay in engine
restart, compared with a usual engine restart.
• When the electric parking brake operation and engine restart occur simultaneously, the electric parking
brake activates after the completion of engine restart.
Stop/Start Readiness Condition
ECM judges stop/start system is ready when the following conditions are satisfied.
*1: Depends on the vehicle conditions.
Item
Condition
Vehicle
Stop/start OFF switch
OFF (Switch indicator: OFF)
Stop/start indicator Lamp
Not blink (No malfunction)
Door (driver side)
Close
Seat belt (driver side)
Fastened
Driving history
Drive the vehicle at 20 km/h (12 MPH) or more after start the en-
gine with ignition switch
Passes 2 minutes or more after start the engine with ignition
switch
*1
Gear position other than neutral is selected after restart
Drive the vehicle at 4 km/h (2.5 MPH) or more after restart
Passes 5 seconds or more after restart
Hood
Close
Air conditioning
Automatic air condi-
tioning
Not in DEF mode
Receives Stop/start permit signal
(for details, refer to
HAC-21, "AUTOMATIC AIR CONDITIONING
Manual air condi-
tioning
Not in DEF mode
ABS
System is normal
ABS not activated
*2
ESP not activated
EPS
System is normal
Battery status
Receives Stop/start permit signal from IPDM E/R.
(for details, refer to
CHG-8, "ENERGY MANAGEMENT SYSTEM
Elevation
2,000 m (6,562 ft) or less
Intelligent parking assist
OFF
Engine
MIL (Malfunction indicator lamp)
Not illuminate (No malfunction)
DPF
Not regeneration
Engine coolant temperature
20 - 105
°
C (69 -221
°
F)
Fuel temperature
90
°
C (194
°
F) or less
Turbocharger temperature
670
°
C (1238
°
F) or less
Starter motor
The number of starter motor operations exceeds the specified
times
High pressure fuel pump
The number of high pressure fuel pump operations exceeds the
specified times
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