Nissan Quest E52. Manual - part 1256

WT-8

< SYSTEM DESCRIPTION >

SYSTEM

SYSTEM

System Description

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• During driving, the TPMS (Tire Pressure Monitoring System) receives the signal transmitted from tire pres-

sure sensor installed in each wheel. The BCM (Body Control Module) of this system has pressure judgment
and trouble diagnosis functions. When the tire pressure monitoring system detects low inflation pressure or
another unusual symptom, the low tire pressure warning lamps in the combination meter comes on.

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

pressure is less than the specified value.

• Activates the TPMS (Tire Pressure Monitoring System) when the vehicle speed is 40 km/h (25 MPH) or

more.

• Added easy fill tire alert function to TPMS (Tire Pressure Monitoring System). Refer to 

WT-9, "Easy Fill Tire

Alert Function"

.

SYSTEM DIAGRAM

INPUT/OUTPUT SIGNAL

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

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.

JSEIA0407GB

Component parts

Signal item

Combination meter

Mainly receives the following signals from BCM via CAN communication.
• Low tire pressure warning lamp signal
• TPMS malfunction warning lamp signal

ABS actuator and electric unit (con-
trol unit)

Mainly transmits the following signals to BCM via CAN communication.
• Vehicle speed signal

TCM

Mainly transmits the following signals to BCM via CAN communication.
• P range signal

IPDM E/R

Mainly receives the following signals from BCM via CAN communication.
• Horn remainder signal

Condition

Low tire pressure warning lamp

Ignition switch OFF

OFF

Ignition switch ON
(system normal)

Warning lamp turns on for 1second, then turns off.

SYSTEM

WT-9

< SYSTEM DESCRIPTION >

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HAZARD WARNING LAMP INDICATION CONDITION

The hazard warning lamp blinks under the following conditions.
• When ID registration is completed. Refer to 

WT-23, "Work Procedure"

.

• During the use of the easy fill tire alert function.

HORN CONTROL CONDITION

During the use of easy fill tire alert function.

Circuit Diagram

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Easy Fill Tire Alert Function

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• This function operates only when the select lever position is in P-range with the ignition switch ON.

CAUTION:

Never start the engine.
NOTE:
The easy fill tire alert function is recommended to use with the ignition switch ON.

Low tire pressure

ON

Tire pressure sensor ID not registered in BCM

Tire pressure monitoring system malfunction
(Other diagnostic item)

Warning lamp blinks 1 min, then turns on.

Condition

Low tire pressure warning lamp

JSEIA0405GB

WT-10

< SYSTEM DESCRIPTION >

SYSTEM

• This function informs the driver of the satisfaction of the recom-

mended COLD tire pressure.
The hazard warning lamp blinks when reaching the recommended
COLD tire pressure during radio wave reception. After reaching the
recommended COLD tire pressure, the horn sounds once and the
hazard warning lamp stops blinking.

• When tire pressure becomes a value equal to or more than 30 kPa

(0.31 kg/cm

2

, 4 psi) more than the recommended COLD tire pres-

sure, the hazard warning lamp and the horn operates three times.
After deflating the tire and reaching the recommended COLD tire
pressure, the horn sounds only once and the hazard warning lamp
stops blinking.

NOTE:
• After starting to inflate the tire, it takes a few seconds for the easy fill tire alert to function.
• If there is no response for approximately 15 seconds or more after inflating the tires, cancel the use of the

easy fill tire alert function or move the vehicle approximately 1 m (3.2 ft) backward or forward to try again.
The air filler pressure may be weak or out of service area.

JSEIA0214GB

DIAGNOSIS SYSTEM (BCM)

WT-11

< SYSTEM DESCRIPTION >

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DIAGNOSIS SYSTEM (BCM)

COMMON ITEM

COMMON ITEM : CONSULT Function (BCM - COMMON ITEM)

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APPLICATION ITEM

CONSULT performs the following functions via CAN communication with BCM.

SYSTEM APPLICATION

BCM can perform the following functions for each system.
NOTE:
It can perform the diagnosis modes except the following for all sub system selection items.

×

: Applicable item

NOTE:

*: For models with automatic air conditioning control system, this diagnosis mode is not used.

FREEZE FRAME DATA (FFD)

The BCM records the following vehicle condition at the time a particular DTC is detected, and displays on
CONSULT.

Diagnosis mode

Function Description

Work Support

Changes the setting for each system function.

Self Diagnostic Result

Displays the diagnosis results judged by BCM.

CAN Diag Support Monitor

Monitors the reception status of CAN communication viewed from BCM.

Data Monitor

The BCM input/output signals are displayed.

Active Test

The signals used to activate each device are forcibly supplied from BCM.

Ecu Identification

The BCM part number is displayed.

Configuration

• Read and save the vehicle specification.
• Write the vehicle specification when replacing BCM.

System

Sub system selection item

Diagnosis mode

Work Support

Data Monitor

Active Test

Door lock

DOOR LOCK

×

×

×

Rear window defogger

REAR DEFOGGER

×

×

Warning chime

BUZZER

×

×

Interior room lamp control system

INT LAMP

×

×

×

Exterior lamp

HEAD LAMP

×

×

×

Wiper and washer

WIPER

×

×

×

Turn signal and hazard warning lamps

FLASHER

×

×

×

Air conditioning control system

AIR CONDITONER

×

×

*

• Intelligent Key system
• Engine start system

INTELLIGENT KEY

×

×

×

Combination switch

COMB SW

×

Body control system

BCM

×

NVIS

IMMU

×

×

×

Interior room lamp battery saver

BATTERY SAVER

×

×

×

Back door open

TRUNK

×

Vehicle security system

THEFT ALM

×

×

×

RAP system

RETAINED PWR

×

Signal buffer system

SIGNAL BUFFER

×

×

TPMS

AIR PRESSURE MONITOR

×

×

×