Component Parts. Tire Pressure Monitoring System. Tire Pressure Monitoring System

Component Parts Location

Component Parts Location

A.	Wheel [front wheel LH shown, others similar (view with wheel and tire removed)]

No.	Component	Function
1.	ABS (Anti-lock Braking System) actuator and electric unit (control unit)	Mainly transmits the following signal to the BCM via CAN communication: Wheel sensor signal Refer to ABS Actuator and Electric Unit (Control Unit) for detailed component location.
2.	TCM (Transmission Control Module) (if so equipped)	Mainly transmits the following signal to the BCM via CAN communication (with CVT): Shift position signal (P range signal) Refer to TCM for detailed component location.
3.	IPDM E/R (Intelligent Power Distribution Module Engine Room)	Mainly receives the following signal from the BCM via CAN communication: Horn reminder signal Mainly transmits the following signal to the BCM via CAN communication (with M/T): N (neutral) position signal Refer to System Description.
4.	BCM (Body Control Module)	Refer to BCM (Tire Pressure Monitor).
5.	Combination meter	Mainly receives the following signals from the BCM via CAN communication: Low tire pressure warning lamp signal Low tire pressure wheel location signal TPMS malfunction warning lamp signal Refer to Combination Meter (type A) or Combination Meter (type B) for detailed component location.
6.	Tire pressure sensor	Refer to Tire Pressure Monitor.

Bcm (tire Pressure Receiver)

BCM (Tire Pressure Receiver)

• Tire pressure receiver is integrated with the BCM.

  

• The tire pressure receiver receives the tire pressure sensor signals transmitted by the tire pressure sensors in each wheel.

• The BCM reads the tire pressure signal received by tire pressure receiver, and controls the low tire pressure warning lamp. The BCM also has a judgment function to detect a system malfunction.

• The BCM uses CAN communication to Illuminate the low tire pressure warning lamp in the combination meter when tire pressure is lowered to less than the specified value or a system malfunction exists.

Information Display

Information Display

• The combination meter is installed in the instrument panel, ahead of the steering wheel.

• A low tire pressure warning or flat tire warning is shown on the information display when they are transmitted from the BCM to the combination meter via CAN communication.

Type A meter Type B meter

Condition		Nissan Sentra Vehicle information display
Ignition switch OFF		Not indicated
Ignition switch ON	Low tire pressure warning lamp remains ON after blinking for one minute. TPMS (Tire Pressure Monitoring System) malfunction.	Not indicated
Ignition switch ON	Low tire pressure warning lamp remains ON (low tire pressure).	Indicated
Ignition switch ON	Flat tire warning.	Indicated

Tire Pressure Sensor

Tire Pressure Sensor

• The tire pressure sensor is installed in each wheel.

  

• The tire pressure sensor transmits the detected tire pressure and temperature signal in the form of a radio wave. The radio signal is received by the tire pressure receiver integrated with the BCM.

System. Tire Pressure Monitoring System

System Description

System Description

SYSTEM DIAGRAM

INPUT SIGNAL AND OUTPUT SIGNAL

Major signal transmission between each unit via communication lines is shown in the following table:

Component parts	Signal item
BCM	Mainly receives the following signal from the ABS actuator and electric unit (control unit) via CAN communication: Wheel sensor signal Mainly receives the following signal from the TCM via CAN communication (with CVT): Shift position signal (P range signal) Mainly receives the following signal from the IPDM E/R via CAN communication (with M/T): N (neutral) position signal Mainly transmits the following signals to the combination meter via CAN communication: Low tire pressure warning lamp signal Low tire pressure wheel location signal TPMS malfunction warning lamp signal Mainly transmits the following signal to the IPDM E/R via CAN communication: Horn reminder signal
Combination meter	Mainly receives the following signals from the BCM via CAN communication: Low tire pressure warning lamp signal Low tire pressure wheel location signal TPMS malfunction warning lamp signal
ABS actuator and electric unit (control unit)	Mainly transmits the following signal to the BCM via CAN communication: Wheel sensor signal
TCM	Mainly transmits the following signal to the BCM via CAN communication (with CVT): Shift position signal (P range signal)
IPDM E/R	Mainly receives the following signal from the BCM via CAN communication: Horn reminder signal Mainly transmits the following signal to the BCM via CAN communication (with M/T): N (neutral) position signal

DESCRIPTION

• During driving, the BCM receives the signal transmitted from the tire pressure sensor installed in each wheel. The BCM of this system has pressure judgment and trouble diagnosis functions. When the TPMS (Tire Pressure Monitoring System) detects low inflation pressure or another unusual symptom, the low tire pressure warning lamp in the combination meter turns ON.

• Tire pressure varies as per the change in tire temperature. Therefore, warning tire pressure value is varied as per the change in tire temperature.

  

• If the tire pressure is less than the warning tire pressure value, the low tire pressure warning lamp illuminates.

• Location of the wheel is specified due to the synchronism of the wheel sensor position and tire pressure sensor position.

• Activates TPMS when the Nissan Sentra vehicle speed is 25 MPH (40 km/h) or more.

• TPMS has Easy Fill Tire Alert function to aid in tire inflation. Refer to System Description.

LOW TIRE PRESSURE WARNING LAMP INDICATION CONDITION

Uses CAN communication from the BCM to illuminate the low tire pressure warning lamp on the combination meter.

Name	Design	Layout
Low tire pressure warning lamp		For layout, refer to Design (type A) or Design (type B).

Condition	Low tire pressure warning lamp
Ignition switch OFF	OFF
Ignition switch ON (system normal)	Warning lamp turns on for 1 second, then turns off.
Low tire pressure	ON
Configuration not performed in TPMS	Warning lamp blinks 1 min, then turns on.
Tire pressure sensor ID not registered in BCM
TPMS malfunction (other diagnostic item)

HAZARD WARNING LAMP INDICATION CONDITION

The hazard warning lamp blinks under the following conditions:

• When ID registration is completed. Refer to Work Procedure.

• During the use of the Easy Fill Tire Alert function.

HORN CONTROL CONDITION

During the use of Easy Fill Tire Alert function.

Low Tire Pressure Warning

System Description

System Description

SYSTEM DIAGRAM

INPUT SIGNAL AND OUTPUT SIGNAL

Major signal transmission between each unit via communication is shown in the following table:

Component parts	Signal item
BCM	Mainly transmits the following signals to the combination meter via CAN communication: Low tire pressure warning lamp signal Low tire pressure wheel location signal TPMS malfunction warning lamp signal
Combination meter	Mainly receives the following signals from the BCM via CAN communication: Low tire pressure warning lamp signal Low tire pressure wheel location signal TPMS malfunction warning lamp signal

SIGNAL PATH

• The BCM receives a signal transmitted from the tire pressure sensors installed in each wheel.

• If the BCM detects the following condition, it sends the signal to the combination meter via CAN communication:

  • Tire pressure is low

• The combination meter turns the low tire pressure warning lamp ON. In addition, warning message will be displayed in the information display.

WARNING/INDICATOR OPERATION CONDITION

• Tire pressure is low

WARNING/INDICATOR CANCEL CONDITION

• Erasing DTC records.

• Tire pressure of all the tires reaches the reference value. For the reference value of tire pressure, refer to Tire Air Pressure.

TIMING CHART

LOW TIRE PRESSURE LOCATION INDICATOR

The low tire pressure location indicator is displayed in the information display of the combination meter with the low tire pressure warning lamp and warning message under the following conditions:

• Tire pressure is low.

• Tire goes flat.

Type A meter

Design	Message
	Tire Pressure Low Add Air

Type B meter

Design	Message
	Tire Pressure Low Add Air

SYNCHRONIZATION WITH MASTER WARNING LAMP

Applicable to low tire pressure warning lamp lighting by low air pressure.

Refer to System Description.

Tire Pressure Display

System Description

System Description

The adoption of this function allows tire pressure indication in the information display of the combination meter.

Type A meter

Design	Description
	Tire pressure of each tire is displayed at the side of each tire. Setting tire pressure of the front and rear tires are displayed between the front and rear tires.

Type B meter

Design	Description
	Tire pressure of each tire is displayed at the side of each tire. Setting tire pressure of the front and rear tires are displayed between the front and rear tires.

Easy Fill Tire Alert Function

System Description

System Description

• The Easy Fill Tire Alert function operates when the shift selector is in the P (park) position (with CVT) or N (neutral) position (with M/T) with the ignition switch ON.

Note:

The Easy Fill Tire Alert function is recommended to use with the ignition switch ON.

Note:

When beginning tire inflation, it takes a few seconds for the Easy Fill Tire Alert to function. If there is no response for approximately 15 seconds or more, cancel the Easy Fill Tire Alert function and move the Nissan Sentra vehicle approximately 3.2 ft (1 m) backward or forward to try again.

• This function informs the driver with a visual and audible indication that the recommended COLD tire pressure has been reached.

• The hazard warning lamps blink when the recommended COLD tire pressure has been reached. After the recommended COLD tire pressure has been reached, the horn sounds once and the hazard warning lamps stop blinking.

  

• If the tire pressure value is equal to or greater than 4 psi (30 kPa, 0.31 kg/cm²) more than the recommended COLD tire pressure, the hazard warning lamps flash and horn sounds three times.

• To return the tire to the recommended COLD tire pressure, deflate the tire until the horn sounds once and the hazard warning lamps stop blinking.

Diagnosis System (bcm). Common Item

Consult Function (bcm - Common Item)

CONSULT Function (BCM - COMMON ITEM)

BCM	Refer to CONSULT Function (BCM - COMMON ITEM).

Air Pressure Monitor

Consult Function (bcm - Air Pressure Monitor)

CONSULT Function (BCM - AIR PRESSURE MONITOR)

BCM	Refer to CONSULT Function (BCM - AIR PRESSURE MONITOR).