Nissan Qashqai J11. Manual - part 470

SYSTEM

EC9-35

< SYSTEM DESCRIPTION >

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When the engine coolant temperature continues to increase and exceeds the alert threshold, ECM judges the
engine is over temperature.
In case of an abnormally high engine coolant temperature, the maximum engine torque is reduced; the driver
will then feel a lack of engine power.

When the engine is not running

Only a FAN1 activation request can be sent for anti-percolation purpose (engine stopped with high engine
coolant temperature). The anti-percolation function is active after ignition switch OFF for a defined maximum
time. At ignition switch OFF, a FAN1 activation request is sent if the engine coolant temperature exceeds
specified temperature and a cutting request is sent when the engine coolant temperature becomes lower.
When there is a default on the engine coolant temperature signal, the FAN1 activation is permanently
requested (engine running).
In addition to this, depending on the equipment mounted on the vehicle, the ECM can also send an activation
request for air conditioning needs or automatic transmission needs or DPF (Diesel Particulate Filter) regener-
ation needs.

THERMOSTAT CONTROL

THERMOSTAT CONTROL : System Description

INFOID:0000000010308984

SYSTEM DRAWING

For system drawing of the thermostat control, Refer to 

CO-85, "Engine Cooling System"

.

DESCRIPTION

This engine has an engine coolant bypass valve and a thermoplunger and uses them for improving a warm-up
time.

Thermoplunger

The thermoplunger is installed to the engine coolant line and directly warms up engine coolant.
ECM transmits a thermoplunger operating signal to the thermoplunger control unit when engine coolant tem-
perature is low.
The thermoplunger control unit applies power to the thermoplunger according to the received signal and
warms up engine coolant.
In addition, ECM activates the thermoplunger during DPF (Diesel Particulate Filter) regeneration and
increases electric load for get more engine load to perform normal DPF regeneration.
ECM controls thermoplunger based on the following information.
• Engine coolant temperature
• Battery voltage
• Engine speed
• Alternator load

Engine Coolant Bypass Valve

The engine coolant bypass valve circulates engine coolant within a narrow range and accelerates a warm-up
by closing the valve and cutting off the engine coolant passage.
ECM applies power to the engine coolant bypass valve control solenoid valve when engine coolant tempera-
ture is low.
The engine coolant bypass valve control solenoid valve switches the passage of negative pressure (vacuum)
sent from the vacuum pump. When power is applied to the solenoid valve, negative pressure is applied to the
engine coolant bypass valve. Accordingly, the engine coolant bypass valve closes.

GLOW CONTROL

GLOW CONTROL : System Description

INFOID:0000000010308985

SYSTEM DESCRIPTION

Glow control system operates at engine starting and after engine starting. The system energizes glow plug
according to engine coolant temperature to improve engine starting function.
When the ignition switch is turned ON, the glow control system starts Pre-glow and the glow indicator lamp
turns ON. When the engine starts, the glow indicator lamp turns OFF and the glow control state changes to
After-glow.
Glow time varies according to engine coolant temperature, barometric pressure and battery voltage.

AUTOMATIC SPEED CONTROL DEVICE (ASCD)

EC9-36

< SYSTEM DESCRIPTION >

[R9M]

SYSTEM

AUTOMATIC SPEED CONTROL DEVICE (ASCD) : System Description

INFOID:0000000010308988

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
• More than 2 switches at ASCD steering switch are pressed at the same time (Set speed will be cleared)
• Brake pedal is depressed
• Clutch pedal is depressed or gear position is changed to neutral position. 
• Vehicle speed decreased under 15% of the set speed from the set speed.
• TCS system is operated.
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.

• 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:0000000010308989

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 and 180 km/h (in the metric system mode) or 20
MPH and 115 MPH (in the yard/pound system mode). ECM controls fuel injector to regulate vehicle speed.
Operation status of speed limiter is indicated on the information display in the combination meter. If any mal-
function occurs in speed limiter system, it automatically deactivates control.

SYSTEM

EC9-37

< SYSTEM DESCRIPTION >

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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)
• ASCD 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

After the speed limiter is released by other method than the MAIN switch, the RESUME/ACCELERATE switch
allows to set the vehicle speed again to the one that is previously set before releasing the speed limiter.

GEAR SHIFT INDICATOR SYSTEM

JMBIA1518GB

EC9-38

< SYSTEM DESCRIPTION >

[R9M]

SYSTEM

GEAR SHIFT INDICATOR SYSTEM : System Description

INFOID:0000000010438161

SYSTEM DIAGRAM

SYSTEM DESCRIPTION

The gear shift indicator is controlled by ECM and indicates recommended gear shift timing on the combination
meter.
• Upward arrow indication (

↑

): Upshift recommendation

• Downward arrow indication (

↓

): Downshift recommendation

ECM calculates optimal gear shift timing for better fuel consumption, according to the input signal and a gear
ratio. In addition, the recommended gear shift timing is corrected, according to driver’s operation and road
conditions. ECM transmits a gear shift indicator signal to the combination meter via CAN communication line.
The gear shift indicator is deactivated when any of the following conditions is satisfied;
• Shift lever is in neutral position.
• Vehicle is under cruise control (ASCD function) or speed limit (speed limiter function).
• MIL (Malfunction Indicator Lamp) is indicated.
• ABS system or ESP system is operating.

STOP/START SYSTEM

JSBIA5004GB