Infiniti QX56 (Z62). Manual - part 1365

 

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Infiniti QX56 (Z62). Manual - part 1365

 

 

COMPONENT PARTS

WT-7

< SYSTEM DESCRIPTION >

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Component Description

INFOID:0000000006225489

*: Mainly used for the tire inflation function.

Low Tire Pressure Warning Control Unit

INFOID:0000000006225490

• After the low tire pressure warning control unit (1) receives the tire

pressure signal from the tire pressure receiver, it controls the oper-
ation of the low tire pressure warning lamp, hazard warning lamp,
and horn.
NOTE:
The hazard warning lamp and the horn are used for the tire infla-
tion indicator function.

• Performs self-diagnosis of the Tire Pressure Monitoring System

(TPMS). 

• Controls tire inflation indicator function.

Transmitter

INFOID:0000000006225491

The transmitter (1) is installed at the position of the air valve on the
road wheel (2). It measures the tire pressure and transmits the tire
pressure information by radio waves.

Component parts

Reference/Function

Transmitter

WT-7, "Transmitter"

Tire pressure receiver

WT-8, "Tire Pressure Receiver"

Low tire pressure warning control unit

WT-7, "Low Tire Pressure Warning Control Unit"

Low tire pressure warning lamp

WT-8, "Low Tire Pressure Warning Lamp"

AV control unit

AV-10, "Component Description"

BCM

BCS-6, "BODY CONTROL SYSTEM : System Description"

ABS actuator and electric unit (control unit)

BRC-16, "System Description"

TCM

*

TM-10, "A/T CONTROL SYSTEM : Component Parts Location"

JPEIC0071ZZ

: Outside

JPEIC0013ZZ

WT-8

< SYSTEM DESCRIPTION >

COMPONENT PARTS

Tire Pressure Receiver

INFOID:0000000006225492

The front tire pressure receiver (1) and rear tire pressure receiver (2)
receive the tire pressure signal by radio waves from the transmitter
at each wheel, and transmit the tire pressure signal to the low tire
pressure warning control unit.

Low Tire Pressure Warning Lamp

INFOID:0000000006225493

Uses CAN communication from the low tire pressure warning control
unit to illuminate the low tire pressure warning lamp on the combina-
tion meter.

*: Tire pressure at each condition differs.

A

:  Front  side

B

: Rear side

JPEIC0070ZZ

NNEIC0001ZZ

Condition

Low tire pressure warning lamp

Ignition switch: OFF

OFF

Ignition switch: ON

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

When tire pressure is low*.

[Less than 189 kPa (1.93 kg/cm

2

, 27.4 psi)]

ON

Tire pressure monitoring system malfunction

Warning lamp blinks 1 minute, then turns ON.

SYSTEM

WT-9

< SYSTEM DESCRIPTION >

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SYSTEM

System Description

INFOID:0000000006225494

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

installed in each wheel. The low tire pressure warning control unit has pressure judgment and trouble diag-
nosis functions. When the low tire pressure warning control unit 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.

• The tire pressure information for each wheel is displayed on the vehicle information display.
• Added tire inflation indicator function to TPMS (Tire Pressure Monitoring System). Refer to 

WT-10, "Tire

Inflation Indicator Function"

.

SYSTEM DIAGRAM

INPUT/OUTPUT SIGNAL

The signal transmission/reception between units via a communication line is mainly as listed in the following
table.

JPEIC0084GB

Component parts

Signal item

Low tire pressure warning control 
unit

Transmits the following signals via CAN communication to BCM.
• Low tire pressure warning lamp signal
• Hazard request signal
• Horn request signal*
Transmits the following signals via CAN communication to the AV control unit.
• Low tire pressure warning lamp signal
• Tire pressure data signal

BCM

Transmits the following signal via CAN communication to the combination meter, based on sig-
nals from low tire pressure warning control unit.
• Low tire pressure warning lamp signal
Transmits the following signal via CAN communication to the IPDM E/R, based on signals from 
low tire pressure warning control unit.
• Horn request signal*
Receives the following signal via CAN communication from low tire pressure warning control 
unit.
• Hazard request signal

AV control unit

Receives the following signals via CAN communication from low tire pressure warning control 
unit.
• Low tire pressure warning lamp signal
• Tire pressure data signal

WT-10

< SYSTEM DESCRIPTION >

SYSTEM

*: Mainly used for the tire inflation indicator function.

LOW TIRE PRESSURE WARNING LAMP CONTROL CONDITION

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

*: Tire pressure at each condition differs.

HAZARD WARNING LAMP CONTROL CONDITION

The low tire pressure warning control unit transmits a hazard request signal to BCM. BCM blinks the hazard
warning lamp, according to the signal.
The hazard warning lamp blinks under the following conditions.

Condition of Blinking The Hazard Warning Lamp

• When wake-up of registered wheel has been completed. Refer to 

WT-28, "Work Procedure"

.

• When ID registration is completed. Refer to 

WT-29, "Work Procedure"

.

• During the use of the tire inflation indicator function.

HORN CONTROL CONDITION

The low tire pressure warning control unit transmits a horn request signal to BCM. BCM controls horn sound,
according to the signal.
The horn sounds under the following condition.

Condition of Sounding Horn

• During the use of tire inflation indicator function.

Tire Inflation Indicator Function

INFOID:0000000006225495

• This function operates only when the A/T shift selector position is in P-range with the ignition switch ON or

with the engine started.
NOTE:
The tire inflation indicator function is recommended to use with the engine stopped.

• 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 tire inflation indicator to function.

ABS actuator and electric unit (con-
trol unit)

Transmits the vehicle speed signal (ABS) via CAN communication for low tire pressure warning 
control unit.

TCM

*

Transmits the P range signal via CAN communication for low tire pressure warning control unit.

Component parts

Signal item

Condition

Low tire pressure warning lamp

Ignition switch: OFF

OFF

Ignition switch: ON (System normal)

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

When tire pressure is low*.

[Less than 189 kPa (1.93 kg/cm

2

, 27.4 psi)]

ON

Tire pressure monitoring system malfunction

Warning lamp blinks 1 minute, then turns ON.

When performing transmitter wake-up operation

Refer to 

WT-28, "Work Procedure"

.

JSEIA0214GB

 

 

 

 

 

 

 

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