Nissan Qashqai J11. Manual - part 185

ECH-38

< SYSTEM DESCRIPTION >

[HRA2DDT]

SYSTEM

Refer to 

ECH-8, "Precaution for Stop/Start System Service"

.

Stop/Start Operation Condition

When the following conditions are satisfied, ECM stops the engine. And the combination meter turns ON a
stop/start indicator lamp.

NOTE:
During the operation of the stop/start system, the stop/start system continues operating even if the vehicle is
stopped by using the parking brake.

Restart Condition

When any of the following conditions is satisfied during stop/start system operating condition (gear position is
neutral), ECM restarts the engine. And the combination meter turns OFF the stop/start indicator lamp. 

*: Restart timing varies according to vehicle condition. For details, refer to RELATIONSHIP BETWEEN VEHI-
CLE CONDITION AND RESTART TIMING.
NOTE:
In models with M/T, the stop/start system operates continuously even if the steering wheel is operated during
the system operating condition.

Restart Inhibit Mode

When the any of the following condition is satisfied during stop/start system operating condition, ECM inhibits
restart of the engine (go into a state in ENGINE STALL). In this case, the engine needs to be started with igni-
tion switch.

Item

Condition

Vehicle

Stop/start readiness condition

Ready

Vehicle speed

Vehicle stopped [0 km/h (0 MPH)]

Steering wheel

Not steer (steering force does not occur)

Brake booster pressure

Presence of sufficient negative pressure to a brake 
force. (Refer to 

BRC-150, "System Description"

.)

Clutch pedal position

Released

Engine

Engine speed

Around idle speed (Approx. 750 rpm or less)

Transmission

Shift lever position

Neutral position

Item

Condition

Stop/start OFF switch

ON (Switch indicator: ON)

Clutch pedal position

Fully depressed

*

Air conditioning

Automatic air conditioning

DEF switch is pressed.

Air conditioning system cannot keep the perfor-
mance.

Manual air conditioning

Mode dial is in DEF position.

Brake booster pressure

Insufficient negative pressure for braking force

Vehicle speed

2 km/h (1.3 MPH) or more

Intelligent parking assist

Intelligent parking assist is activated.

Battery

Poor battery performance
(for details, refer to 

CHG-8, "ENERGY MANAGE-

MENT SYSTEM : System Description"

.)

Item

Condition

Engine hood

Opened

Driver presence

*

Absent: Both of the following conditions are 
satisfied.
• Seat belt (driver side): Released
• Door (driver side): Open

SYSTEM

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< SYSTEM DESCRIPTION >

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*: When the condition is satisfied either door open or seat belt released, ECM transitions to the recovery wait-
ing mode (not ENGINE STALL) for approximately 5 minutes. In this case, the engine is able to start by clutch
operation.

RELATIONSHIP BETWEEN VEHICLE CONDITION AND RESTART TIMING

ECM detects clutch pedal position based on the clutch pedal position switch signal and clutch interlock switch
signal. The engine restart timing varies with gear position, vehicle speed, and clutch position.

 Engine restart condition

x: Restart —: Not restart

NOTE:
If the above mentioned “Not restart” condition occurs during restart, ECM stops cranking and returns to the
stop/start system operating condition (engine stop).

ENGINE STALL ASSIST FUNCTION

The engine stall assist function allows the engine to start only with a clutch operation without operating the
ignition switch when a clutch operation is unsuccessful during vehicle start.
When an engine stall caused by a clutch operation error is detected, the stop/start system enters the recovery
waiting mode and ECM indicates the activation of engine stall assist function by illuminating the stop/start indi-
cator lamp. When the clutch pedal is depressed under this condition, the engine starts.
NOTE:
This function also operates at an engine start other than the one performed during stop/start system operation.
This function operates when the following conditions are satisfied:
• After engine warm-up.
• Vehicle stopped. (No vehicle speed input.)
• The battery is charged enough.
• No malfunctions in the engine control system and the stop/start system. (No DTC detected.)

VOLTAGE STABILIZER FUNCTION

ECM transmits a voltage stabilizer signal to the DC/DC converter during cranking at an engine restart. The
DC/DC converter temporarily increases the voltage to prevent the electric equipment from reset due to low
voltage. The adoption of the DC/DC converter enables a stable power supply to the electric equipment con-
nected to the DC/DC converter and permits a substantial lowering of the voltage. For the electrical equipment
connected to the DC/DC converter, see “SYSTEM DIAGRAM”.
NOTE:
The brightness of the head lamps may be changed due to the voltage reduction at an engine restart because
they are not connected to the DC/DC converter.

ENGINE RESTART BYPASS RELAY CONTROL

Vehicle condition

Clutch pedal position

Vehicle 

speed

Gear 

position

Fully depressed

Half depressed

Released

Clutch pedal 

position SW

Clutch interlock 

SW

Clutch pedal 

position SW

Clutch interlock 

SW

Clutch pedal 

position SW

Clutch interlock 

SW

OFF

ON

OFF

OFF

ON

OFF

Vehicle 

stopped

Neutral

x

x

—

Except 
neutral

x

—

—

Vehicle 

speed oc-

curs

Neutral

x

x

x

Except 
neutral

x

—

—

ECH-40

< SYSTEM DESCRIPTION >

[HRA2DDT]

SYSTEM

ECM controls the engine restart bypass control relay and activates
the engine restart bypass relay. When the restart conditions are sat-
isfied, ECM turns ON the engine restart bypass control relay instan-
taneously right after the restart and opens the engine restart bypass
relay. This allows a current to pass the inner resistance circuit right
after the starter motor is activated. When the starter motor is rotat-
ing, the voltage is directly supplied to the starter motor without being
passed through the inner resistance circuit in the engine restart
bypass relay because the engine restart bypass relay is closed. In
this way, ECM enables the battery voltage stabilization and reduces
the battery deterioration rate by decreasing the battery voltage drop
resulted from cranking at an engine restart.

AUTOMATIC SPEED CONTROL DEVICE (ASCD)

AUTOMATIC SPEED CONTROL DEVICE (ASCD) : System Description

INFOID:0000000010435772

BASIC ASCD SYSTEM

Automatic Speed Control Device (ASCD) allows a driver to keep vehicle at predetermined constant speed
without depressing accelerator pedal. Driver can set vehicle speed in advance between approximately 40 km/
h (25 MPH) and 170 km/h (105 MPH).
ECM controls fuel injector to regulate engine speed.
Operation status of ASCD is indicated on the information display in the combination meter. If any malfunction
occurs in ASCD system, it automatically deactivates control.
NOTE:
Always drive vehicle in a safe manner according to traffic conditions and obey all traffic laws.

SET OPERATION

Press ASCD MAIN switch. (CRUISE indicated on the information display)
When vehicle speed reaches a desired speed between approximately 40 km/h (25 MPH) and 170 km/h (105
MPH), press SET/COAST switch. (SET indicated on the information display)

ACCELERATE OPERATION

If the RESUME/ACCELERATE switch is pressed during cruise control driving, increase the vehicle speed until
the switch is released or vehicle speed reaches maximum speed controlled by the system.
And then ASCD will keep the new set speed.

CANCEL OPERATION

When any of following conditions exist, cruise operation will be canceled.
• CANCEL switch is pressed
• Brake pedal is depressed
• Clutch pedal is depressed or gear position is changed to neutral position. 
• Less than 33 km/h (20 MPH).
When the ECM detects any of the following conditions, the ECM will cancel the cruise operation and inform
the driver by blinking indicator.
• Engine coolant temperature is slightly higher than the normal operating temperature, CRUISE indicator may

blink slowly.
When the engine coolant temperature decreases to the normal operating temperature, CRUISE indicator will
stop blinking and the cruise operation will be able to work by pressing SET/COAST switch or RESUME/
ACCELERATE switch.

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SYSTEM

ECH-41

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• Malfunction for some self-diagnoses regarding ASCD control: SET indicator will blink quickly.
If MAIN switch is turned to OFF during ASCD is activated, all of ASCD operations will be canceled and vehicle
speed memory will be erased.

COAST OPERATION

When the SET/COAST switch is pressed during cruise control driving, decrease vehicle set speed until the
switch is released. And then ASCD will keep the new set speed.

RESUME OPERATION

When the RESUME/ACCELERATE switch is pressed after cancel operation other than pressing ASCD MAIN
switch is performed, vehicle speed will return to last set speed. To resume vehicle set speed, vehicle condition
must meet following conditions.
• Brake pedal is released
• Clutch pedal is released 
• Vehicle speed is greater than 40 km/h (25 MPH) and less than 170 km/h (105 MPH)

SPEED LIMITER

SPEED LIMITER : System Description

INFOID:0000000010435773

BASIC SPEED LIMITER SYSTEM

The speed limiter is a system that enables to restrict the vehicle speed within the set speed that is selected by
the driver. Driver can set vehicle speed between 30 km/h (20 MPH) and 180 km/h (115 MPH) (in the metric
system mode) or 20 MPH and 115 MPH (in the yard/pound system mode). ECM controls fuel injector to regu-
late vehicle speed. Operation status of speed limiter is indicated on the information display in the combination
meter. If any malfunction occurs in speed limiter system, it automatically deactivates control.
NOTE:
Always drive vehicle in safe manner according to traffic conditions and obey all traffic laws.

SET OPERATION

Press speed limiter MAIN switch. (LIMIT indicated on the information display)
By pressing the SET/COAST switch, the vehicle speed can be set within the range between 30 km/h (20
MPH) and 180 km/h (115 MPH). (SET and set speed is indicated on the information display)
When pressing the RESUME/ACCELERATE switch, the set speed can be increased.
When pressing the SET/COAST switch, the set speed can be decreased.

CANCEL OPERATION

When any of following conditions exist, speed limiter operation will be canceled.
• Speed limiter MAIN switch pressed (Set speed will be cleared)
• CANCEL switch is pressed
• Accelerator pedal is fully depressed (kickdown)

When the accelerator pedal is depressed within the range shown in the figure (A) below, the accelerator
pedal reaction force strengthens. Further depressing the accelerator pedal within the (C) range cancels the
speed limiter. This allows acceleration in emergencies.

RESUME OPERATION

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