Infiniti G37 Coupe. Manual - part 1409

WT-8

< FUNCTION DIAGNOSIS >

TPMS

The BCM (1) reads the air pressure signal received by the tire pres-
sure receiver, and controls the low tire pressure warning lamp and
the buzzer operations. It also has a judgment function to detect a
system malfunction.

LOW TIRE PRESSURE WARNING LAMP

The unified meter and A/C amp receives tire pressure status from
the BCM using CAN communication. When BCM judges from a
transmitter signal that tire pressure is insufficient, BCM transmits a
signal to unified meter and A/C amp through CAN communication.
unified meter and A/C amp turns on the low tire pressure warning
lamp mounted on the Combination meter.

Low tire pressure warning lamp indication

NOTE1: Standard air pressure is for 230 kPa (2.3 kg/cm

2

, 33 psi) vehicles.

NOTE2: Standard air pressure is for 240 kPa (2.4 kg/cm

2

, 35 psi) vehicles.

TIRE PRESSURE WARNING CHECK SWITCH

The following item can be checked by grounding the tire pressure
warning check switch (1) harness connector terminal.
• The low tire pressure warning lamp in the combination meter will

blinks according to the self-diagnostic results.

JPEIC0002ZZ

SEIA0434E

Condition

Low tire pressure warning lamp

Less than 182.7 kPa (1.9 kg/cm

2

, 26 psi) [NOTE1]

ON

Less than 189.6 kPa (1.9 kg/cm

2

, 27 psi) [NOTE2]

Low tire pressure warning system malfunction [Other diagnostic item]

Warning lamp blinks 1 min, then turns ON.

JPEIC0003ZZ

TPMS

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< FUNCTION DIAGNOSIS >

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Component Parts Location

INFOID:0000000001686950

Component Description

INFOID:0000000001686951

1.

Transmitter

2.

BCM

3.

Tire pressure receiver

4.

Tire pressure warning check switch

5.

Low tire pressure warning lamp

6.

Unified meter and A/C amp

A.

Wheel

B.

Dash side lower (passenger side)

C.

Upper instrument assist lower panel

D.

Behind instrument lower panel 
(driver side)

E.

Inside combination meter

F.

Behind cluster lid C

JPEIC0028ZZ

Component parts

Function

BCM (Body Control Module)

WT-32, "Description"

.

Transmitter

WT-17, "Description"

.

Tire pressure receiver

WT-42, "Description"

.

Tire pressure warning check switch

WT-44, "Description"

.

Turn signal lamp

ID registration of each wheel has been completed, turn signal lamp flashes.

Combination meter

Controls a low tire pressure warning lamp, turn signal lamp, and buzzer by signals from the 
unified meter and A/C amp.

Low tire pressure warning lamp

Illuminates if malfunction is detected in electrical system of TPMS.

Unified meter and A/C amp.

Transmits the vehicle speed signal via CAN communication to BCM.
Receives the tire pressure signal via CAN communication to BCM.

WT-10

< FUNCTION DIAGNOSIS >

DIAGNOSIS SYSTEM (BCM)

DIAGNOSIS SYSTEM (BCM)

COMMON ITEM

COMMON ITEM : CONSULT-III Function (BCM - COMMON ITEM)

INFOID:0000000001903111

APPLICATION ITEM

CONSULT-III 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.

*: This item is displayed, but is not used. 

FREEZE FRAME DATA (FFD) AND IGN COUNTER

Freeze Frame Data

The BCM records the following condition at the moment a particular DTC is detected.
• Vehicle Speed
• Odd Trip Meter

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 MNTR

Monitors the reception status of CAN communication viewed from BCM. Refer to CONSULT-III opera-
tion manual.

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

This function is not used even though it is displayed.

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 timer

INT LAMP

×

×

×

Exterior lamp

HEAD LAMP

×

×

×

Wiper and washer

WIPER

×

×

×

Turn signal and hazard warning lamps

FLASHER

×

×

×

Air conditioner*

AIR CONDITONER

×

Intelligent Key system

INTELLIGENT KEY

×

×

×

Combination switch

COMB SW

×

BCM

BCM

×

IVIS - NATS

IMMU

×

×

Interior room lamp battery saver

BATTERY SAVER

×

×

×

Trunk open

TRUNK

×

Vehicle security system

THEFT ALM

×

×

×

RAP system

RETAINED PWR

×

Signal buffer system

SIGNAL BUFFER

×

×

TPMS

TPMS (AIR PRESSURE MONITOR)

×

×

×

DIAGNOSIS SYSTEM (BCM)

WT-11

< FUNCTION DIAGNOSIS >

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• Vehicle Condition (BCM detected condition)

IGN Counter

IGN counter indicates the number of times that ignition switch is turned ON after DTC is detected.
• The number is 0 when a malfunction is detected now.
• The number increases like 1 

→

 2 

→

 3...38 

→

 39 after returning to the normal condition whenever ignition

switch OFF 

→

 ON.

• The number is fixed to 39 until the self-diagnosis results are erased if it is over 39.

AIR PRESSURE MONITOR

AIR PRESSURE MONITOR : Diagnosis Description

INFOID:0000000001686953

DESCRIPTION

During driving, the TPMS receives the signal transmitted from the transmitter installed in each wheel, when
the tire pressure becomes low. The control unit (BCM) of this system has pressure judgment and trouble diag-
nosis functions.
When the TPMS detects low inflation pressure or another unusual symptom, the low tire pressure warning
lamps in the combination meter comes on. 

SELF DIAGNOSTIC PROCEDURE (WITH CONSULT-III)

 With CONSULT-III

Touch “SELF-DIAG RESULT” display shows malfunction experienced since the last erasing operation. Refer
to 

WT-77, "DTC Index"

.

SELF DIAGNOSTIC PROCEDURE (WITHOUT CONSULT-III)

 Without CONSULT-III

To start the self-diagnostic results mode, ground terminal of the tire pressure warning check connector. The
malfunction location is indicated by the low tire pressure warning lamp blinking.

CONSULT screen terms

Description

SLEEP>LOCK

While turning BCM status from low power consumption mode to normal mode (Power supply 
position is “LOCK”)

SLEEP>OFF

While turning BCM status from low power consumption mode to normal mode (Power supply 
position is “OFF”.)

LOCK>ACC

While turning power supply position from “LOCK” to “ACC”

ACC>ON

While turning power supply position from “ACC” to “IGN”

RUN>ACC

While turning power supply position from “RUN” to “ACC” (Vehicle is stopping and selector 
lever is except P position.)

CRANK>RUN

While turning power supply position from “CRANKING” to “RUN” (From cranking up the en-
gine to run it)

RUN>URGENT

While turning power supply position from “RUN“ to “ACC” (Emergency stop operation)

ACC>OFF

While turning power supply position from “ACC” to “OFF”

OFF>LOCK

While turning power supply position from “OFF” to “LOCK”

OFF>ACC

While turning power supply position from “OFF” to “ACC”

ON>CRANK

While turning power supply position from “IGN” to “CRANKING”

OFF>SLEEP

While turning BCM status from normal mode (Power supply position is “OFF”.) to low power 
consumption mode

LOCK>SLEEP

While turning BCM status from normal mode (Power supply position is “LOCK”.) to low pow-
er consumption mode

LOCK

Power supply position is “LOCK” (Ignition switch OFF with steering is locked.)

OFF

Power supply position is “OFF” (Ignition switch OFF with steering is unlocked.)

ACC

Power supply position is “ACC” (Ignition switch ACC)

ON

Power supply position is “IGN” (Ignition switch ON with engine stopped)

ENGINE RUN

Power supply position is “RUN” (Ignition switch ON with engine running)

CRANKING

Power supply position is “CRANKING” (At engine cranking)