Infiniti QX56 (JA60). Manual - part 1020

WT-8

< FUNCTION DIAGNOSIS >

TPMS

FUNCTION DIAGNOSIS

TPMS

System Diagram

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System Description

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BODY CONTROL MODULE (BCM)

The BCM is shown with the lower instrument panel LH removed. The

BCM reads the air pressure signal received by the remote keyless

entry receiver, and controls the low tire pressure warning lamp as

shown below. It also has a self-diagnosis function to detect a system

malfunction.

TRANSMITTER

A sensor-transmitter integrated with a valve is installed in each

wheel, and transmits a detected air pressure signal in the form of a

radio wave.  The radio signal is received by the remote keyless entry

receiver.

REMOTE KEYLESS ENTRY RECEIVER

ALEIA0004GB

Condition

Low tire pressure warning lamp

System normal

On for 1 second after ignition ON

Tire less than 193 kPa (2.0 kg/cm

2

 , 28 psi)

[Flat tire]

ON

TPMS malfunction

After key ON, flashes once per sec-

ond for 1 minute, then stays ON

LEIA0068E

WEIA0137E

TPMS

WT-9

< FUNCTION DIAGNOSIS >

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The remote keyless entry receiver is shown with the instrument

panel RH removed. The remote keyless entry receiver receives the

air pressure signal transmitted by the transmitter in each wheel.

COMBINATION METER

The combination meter receives tire pressure status from the BCM

using CAN communication. When a low tire pressure condition is

sensed by the BCM, the combination meter low tire pressure warn-

ing lamp is activated.

TIRE PRESSURE WARNING CHECK CONNECTOR

The tire pressure warning check connector can be grounded in order

to initiate self-diagnosis without a CONSULT-III. Refer to 

WT-34,

"Self-Diagnosis (Without CONSULT-III)"

. The tire pressure warning

check connector is located behind the lower portion of the instrument

panel LH.

DISPLAY UNIT

Displays the air pressure of each tire.

NOTE:

After the ignition switch is turned on, the pressure values will not be

displayed until the data of each wheel is received.

LEIA0069E

LEIA0055E

LEIA0068E

AWEIA0017GB

WT-10

< FUNCTION DIAGNOSIS >

TPMS

System Component

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AWEIA0126ZZ

1.

Combination meter M23, M24

2.

Display unit M93

3.

Remote keyless entry receiver 
M120

4.

AV control unit M43, M45

5.

Tire pressure warning check connector 
M123

6.

Transmitter

7.

BCM M18, M20

DIAGNOSIS SYSTEM (BCM)

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< FUNCTION DIAGNOSIS >

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DIAGNOSIS SYSTEM (BCM)

CONSULT-III Function (BCM)

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CONSULT-III DIAGNOSTIC MODES

CONSULT-III can display each diagnostic item using the diagnostic test modes shown following.

DESCRIPTION

During driving, the tire pressure monitoring system receives the signal transmitted from the transmitter

installed in each wheel, and turns on the low tire pressure warning lamp when the tire pressure becomes low.

The control unit (BCM) for this system has pressure judgement and self-diagnosis functions.

FUNCTION

When the tire pressure monitoring system detects low inflation pressure or an internal malfunction, the low tire

pressure warning lamp in the combination meter comes on. The malfunction is indicated by the low tire pres-

sure warning lamp flashing.

CONSULT-III Application to Tire Pressure Monitoring System

× : Applicable
– : Not applicable

Data Monitor Mode

Diagnostic mode

Description

Work Support

Supports inspections and adjustments. Commands are transmitted to the BCM 
for setting the status suitable for required operation, input/output signals are re-
ceived from the BCM and received data is displayed.

Data Monitor

Displays BCM input/output data in real time.

Active Test

Operation of electrical loads can be checked by sending drive signal to them.

Self Diagnostic Result

Displays BCM self-diagnosis results.

CAN Diag Support Monitor

The result of transmit/receive diagnosis of CAN communication can be read.

ECU Identification

BCM part number can be read.

Configuration

Performs BCM configuration read/write functions.

ITEM

SELF-DIAGNOSTIC RESULTS

DATA MONITOR

Front - Left transmitter

×

×

Front - Right transmitter

×

×

Rear - Left transmitter

×

×

Rear - Right transmitter

×

×

Warning lamp

—

×

Vehicle speed

×

×

CAN Communication

×

×

MONITOR

CONDITION

SPECIFICATION

VEHICLE SPEED

Drive vehicle.

Vehicle speed (km/h or MPH)

AIR PRESS FL

• Drive vehicle for a few minutes.
or 
• Ignition switch ON and activation tool 

is transmitting activation signals. 

Tire pressure (kPa or psi)

AIR PRESS FR

AIR PRESS RR

AIR PRESS RL

ID REGST FL1

Ignition switch ON

ID not registered: YET
ID registered: DONE

ID REGST FR1

ID REGST RR1

ID REGST RL1