Nissan X-Trail 32. Manual — part 143
BRC-38
< SYSTEM DESCRIPTION >
[WITH VDC (ESP)]
SYSTEM
The amount of brake fluid supplied to the rear LH brake from the master cylinder is controlled according to
time that the ABS IN valve is not energized (time that the ABS IN valve is open).
When ABS Function is Operating (During Pressure Holds)
During pressure front RH brake holds
• Since the ABS IN valve and the ABS OUT valve are closed, the front RH brake, master cylinder, and reser-
voir are blocked. This maintains fluid pressure applied on the front RH brake.
During pressure front LH brake holds
• Since the ABS IN valve and the ABS OUT valve are closed, the front LH brake, master cylinder, and reser-
voir are blocked. This maintains fluid pressure applied on the front LH brake.
During pressure rear RH brake holds
• Since the ABS IN valve and the ABS OUT valve are closed, the rear RH brake, master cylinder, and reser-
voir are blocked. This maintains fluid pressure applied on the rear RH brake.
During pressure rear LH brake holds
• Since the ABS IN valve and the ABS OUT valve are closed, the rear LH brake, master cylinder, and reser-
voir are blocked. This maintains fluid pressure applied on the rear LH brake.
JSFIA1739GB
Component parts
Not activated
When pressure holds
Cut valve 1
Power supply is not supplied (open)
Power supply is not supplied (open)
Cut valve 2
Power supply is not supplied (open)
Power supply is not supplied (open)
Suction valve 1
Power supply is not supplied (close)
Power supply is not supplied (close)
Suction valve 2
Power supply is not supplied (close)
Power supply is not supplied (close)
ABS IN valve
Power supply is not supplied (open)
Power supply is supplied (close)
ABS OUT valve
Power supply is not supplied (close)
Power supply is not supplied (close)
Each brake (fluid pressure)
—
Pressure holds
SYSTEM
BRC-39
< SYSTEM DESCRIPTION >
[WITH VDC (ESP)]
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When ABS Function is in Operation (During Pressure Decreases)
During pressure front RH brake decreased
• Since the ABS IN valve is closed and the ABS OUT valve is opened, fluid pressure applied on the front RH
brake is supplied to the reservoir through the ABS OUT valve. This fluid pressure decreases when sent to
the master cylinder by the pump.
During pressure front LH brake decreased
• Since the ABS IN valve is closed and the ABS OUT valve is opened, fluid pressure applied on the front LH
brake is supplied to the reservoir through the ABS OUT valve. This fluid pressure decreases when sent to
the master cylinder by the pump.
During pressure rear RH brake decreased
• Since the ABS IN valve is closed and the ABS OUT valve is opened, fluid pressure applied on the rear RH
brake is supplied to the reservoir through the ABS OUT valve. This fluid pressure decreases when sent to
the master cylinder by the pump.
During pressure rear LH brake decreased
• Since the ABS IN valve is closed and the ABS OUT valve is opened, fluid pressure applied on the rear LH
brake is supplied to the reservoir through the ABS OUT valve. This fluid pressure decreases when sent to
the master cylinder by the pump.
JSFIA1740GB
Component parts
Not activated
When pressure decreases
Cut valve 1
Power supply is not supplied (open)
Power supply is not supplied (open)
Cut valve 2
Power supply is not supplied (open)
Power supply is not supplied (open)
Suction valve 1
Power supply is not supplied (close)
Power supply is not supplied (close)
Suction valve 2
Power supply is not supplied (close)
Power supply is not supplied (close)
ABS IN valve
Power supply is not supplied (open)
Power supply is supplied (close)
ABS OUT valve
Power supply is not supplied (close)
Power supply is supplied (open)
Each brake (fluid pressure)
—
Pressure decreases
BRC-40
< SYSTEM DESCRIPTION >
[WITH VDC (ESP)]
SYSTEM
When Brake Release
During pressure front RH brake release
• Brake fluid is supplied to the front RH brake through the return check valve of the ABS IN valve and the cut
valve 1, and returns to the master cylinder.
During pressure front LH brake release
• Brake fluid is supplied to the front LH brake through the return check valve of the ABS IN valve and the cut
valve 2, and returns to the master cylinder.
During pressure rear RH brake release
• Brake fluid is supplied to the rear RH brake through the return check valve of the ABS IN valve and the cut
valve 2, and returns to the master cylinder.
During pressure rear LH brake release
• Brake fluid is supplied to the rear LH brake through the return check valve of the ABS IN valve and the cut
valve 1, and returns to the master cylinder.
Component Parts and Function
JSFIA1741GB
Component pars
Not activated
When pressure decrease
Cut valve 1
Power supply is not supplied (open)
Power supply is not supplied (open)
Cut valve 2
Power supply is not supplied (open)
Power supply is not supplied (open)
Suction valve 1
Power supply is not supplied (close)
Power supply is not supplied (close)
Suction valve 2
Power supply is not supplied (close)
Power supply is not supplied (close)
ABS IN valve
Power supply is not supplied (open)
Power supply is not supplied (open)
ABS OUT valve
Power supply is not supplied (close)
Power supply is not supplied (close)
Each brake (fluid pressure)
—
Pressure decreases
Component parts
Function
Pump
• Pressure the brake fluid and send.
• Returns the brake fluid reserved in reservoir to master cylinder by reducing pressure.
Motor
Activates the pump according to signals from ABS actuator and electric unit (control unit).
SYSTEM
BRC-41
< SYSTEM DESCRIPTION >
[WITH VDC (ESP)]
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CONDITION FOR TURN ON THE WARNING LAMP
Turns ON when ignition switch turns ON and turns OFF when the system is normal, for bulb check purposes.
*: 4WD models with gasoline engine
CONDITION FOR TURN ON THE INDICATOR LAMP
Turns ON when ignition switch turns ON and turns OFF when the system is normal, for bulb check purposes.
Cut valve 1
Cut valve 2
Shuts off the ordinary brake line from master cylinder.
Suction valve 1
Suction valve 2
Supplies the brake fluid from master cylinder to the pump.
ABS IN valve
Switches the fluid pressure line to increase or hold according.
ABS OUT valve
Switches the fluid pressure line to increase, hold or decrease according.
return check valve
Returns the brake fluid from each brake to master cylinder by bypassing orifice of each valve when
brake is released.
Reservoir
Temporarily reserves the brake fluid drained from each brake, so that pressure efficiently decreases
when decreasing pressure of each brake.
Pressure sensor
Detects the brake fluid pressure and transmits signal to ABS actuator and electric unit (control unit).
Component parts
Function
Condition (status)
ABS warning lamp
Brake warning lamp
VDC warning lamp
Ignition switch OFF
OFF
OFF
OFF
For approx. 1 second after the ignition switch is turned ON
ON
ON
ON
Approx. 1 second after ignition switch is turned ON (when the before
engine starts, system is in normal operation)
OFF
ON
OFF
After engine starts
OFF
OFF
OFF
When parking brake operates (parking brake switch ON)
OFF
OFF
OFF
When brake fluid is less than the specified level (brake fluid level
switch ON)
OFF
ON
ON
VDC function is malfunctioning
OFF
OFF
ON
TCS function is malfunctioning
OFF
OFF
ON
ABS function is malfunctioning
ON
OFF
ON
EBD function is malfunctioning
ON
ON
ON
Brake limited slip differential (BLSD) function is malfunctioning
OFF
OFF
ON
Brake assist function is malfunctioning
OFF
OFF
ON
Brake force distribution function is malfunctioning
OFF
OFF
ON
hill start assist function is malfunctioning
OFF
OFF
ON
Advanced hill descent control function is malfunctioning
*
OFF
OFF
ON
Brake vacuum sensor function is malfunctioning
OFF
ON
OFF
VDC function is operating
OFF
OFF
Blinking
TCS function is operating
OFF
OFF
Blinking
ABS function is operating
OFF
OFF
OFF
EBD function is operating
OFF
OFF
OFF
Brake limited slip differential (BLSD) function is operating
OFF
OFF
Blinking
Brake assist function is operating
OFF
OFF
OFF
Brake force distribution function is operating
OFF
OFF
OFF
hill start assist function is operating
OFF
OFF
OFF
Advanced hill descent control function is operating
*
OFF
OFF
OFF
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