Infiniti G37 Coupe. Manual - part 228

BCS-30

< FUNCTION DIAGNOSIS >

DIAGNOSIS SYSTEM (BCM)

AIR PRESSURE MONITOR : Diagnosis Description

INFOID:0000000001830816

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.

NOTE:
When the low tire pressure warning lamp blinks 5 Hz and continues repeating it, the system is normal.

JPEIC0030GB

Blinking

pattern

Items

Diagnostic items detected when···

Check item

Tire pressure value (Front LH)

Front LH tire pressure drops to * kPa (* kg/cm

, * psi) or less. [NOTE]

–

Tire pressure value (Front RH)

Front RH tire pressure drops to * kPa (* kg/cm

, * psi) or less. [NOTE]

Tire pressure value (Rear RH)

Rear RH tire pressure drops to * kPa (* kg/cm

, * psi) or less. [NOTE]

Tire pressure value (Rear LH)

Rear LH tire pressure drops to * kPa (* kg/cm

, * psi) or less. [NOTE]

Transmitter no data (Front LH)

Data from front LH transmitter can not be receive.

WT-17

Transmitter no data (Front RH)

Data from front RH transmitter can not be receive.

Transmitter no data (Rear RH)

Data from Rear RH transmitter can not be receive.

Transmitter no data (Rear LH)

Data from Rear LH transmitter can not be receive.

Transmitter checksum error
(Front LH)

Checksum data from front LH transmitter is malfunctioning.

WT-20

Transmitter checksum error
(Front RH)

Checksum data from front RH transmitter is malfunctioning.

Transmitter checksum error
(Rear RH)

Checksum data from rear RH transmitter is malfunctioning.

Transmitter checksum error
(Rear LH)

Checksum data from rear RH transmitter is malfunctioning.

BCS

DIAGNOSIS SYSTEM (BCM)

BCS-31

< FUNCTION DIAGNOSIS >

NOTE:

• 182.7 kPa (1.9 kg/cm

, 26 psi): Standard air pressure is for 230 kPa (2.3 kg/cm

,33 psi) vehicles.

• 189.6 kPa (1.9 kg/cm

, 27 psi): Standard air pressure is for 240 kPa (2.4 kg/cm

, 35 psi) vehicles.

ERASE SELF-DIAGNOSIS

With CONSULT-III

Perform applicable inspection of malfunctioning item and then repair or replace.

Turn ignition switch “ON” and select “SELF-DIAG RESULTS” mode for “AIR PRESSURE MONITOR” with
CONSULT-III.

Touch “ERASE” on CONSULT-III screen to erase memory.

Without CONSULT-III

• In order to make it easier to find the cause of hard-to-duplicate malfunctions, malfunction information is

stored into the control unit as necessary during use by the user. This memory is not erased no matter how
many times the ignition switch is turned “ON” and“OFF”.

• However, this information is erased by turning ignition switch “OFF” after performing self-diagnostic or by

erasing the memory using the CONSULT-III.

AIR PRESSURE MONITOR : CONSULT-III Function (BCM - AIR PRESSURE MONI-
TOR)

INFOID:0000000001830817

WORK SUPPORT MODE

ID Read

The registered ID number is displayed.

Transmitter pressure data error
(Front LH)

Air pressure data from front LH transmitter is malfunction.

WT-23

Transmitter pressure data error
(Front RH)

Air pressure data from front RH transmitter is malfunction.

Transmitter pressure data error
(Rear RH)

Air pressure data from rear RH transmitter is malfunction.

Transmitter pressure data error
(Rear LH)

Air pressure data from rear LH transmitter is malfunction.

Transmitter function code error
(Front LH)

Function code data from front LH transmitter is malfunction.

WT-25

Transmitter function code error
(Front RH)

Function code data from front RH transmitter is malfunction.

Transmitter function code error
(Rear RH)

Function code data from rear RH transmitter is malfunction.

Transmitter function code error
(Rear LH)

Function code data from rear LH transmitter is malfunction.

Transmitter battery voltage low
(Front LH)

Battery voltage of front LH transmitter drops.

WT-28

Transmitter battery voltage low
(Front RH)

Battery voltage of front RH transmitter drops.

Transmitter battery voltage low
(Rear RH)

Battery voltage of rear RH transmitter drops.

Transmitter battery voltage low
(Rear LH)

Battery voltage of rear LH transmitter drops.

Vehicle speed signal error

Speed signal is not detected.

WT-31

BCM failure about TPMS

Tire pressure monitoring system malfunction in BCM

WT-32

No blinking

Tire pressure warning check
switch

Tire pressure warning switch circuit is open.

–

Blinking

pattern

Items

Diagnostic items detected when···

Check item

BCS-32

< FUNCTION DIAGNOSIS >

DIAGNOSIS SYSTEM (BCM)

ID Regist

Refer to

WT-5, "ID REGISTRATION PROCEDURE : Special Repair Requirement"

SELF-DIAG RESULTS MODE

Operation Procedure

Refer to

WT-77, "DTC Index"

DATA MONITOR MODE

Screen of data monitor mode is displayed.
NOTE:
When malfunction is detected, CONSULT-III perform REAL-TIME DIAGNOSIS.
Also, any malfunction detected while in this mode will be displayed at real time.

Display item list

NOTE:
Before performing the self-diagnosis, be sure to register the ID, or erase the actual malfunction location may
be different from that displayed on CONSULT-III.

ACTIVE TEST MODE

NOTE:
Before performing the self-diagnosis, be sure to register the ID, or erase the actual malfunction may be differ-
ent from that displayed on CONSULT-III.

TEST ITEM LIST

Monitor

Condition

Specification

AIR PRESS FL
AIR PRESS FR
AIR PRESS RR
AIR PRESS RL

• Drive vehicle for a few minutes.

• Ignition switch ON and activation tool is trans-

mitting activation signals.

Tire pressure (kPa or Psi)

ID REGST FL
ID REGST FR
ID REGST RR
ID REGST RL

Ignition switch ON

Registration ID : Green
No registration : Red

WARNING LAMP

Low tire pressure warning lamp on: ON
Low tire pressure warning lamp off: OFF

BUZZER

Buzzer in combination meter on: ON
Buzzer in combination meter off: OFF

Test item

Content

WARNING LAMP

This test is able to check to check that the low tire pressure warning lamp turns on.

ID REGIST WARNING

This test is able to check to check that the buzzer sounds or the low tire pressure warning lamp
turns on.

RUN FLAT/T WARN BUZZER

This test is able to check to check that the buzzer sounds.

FLASHER

This test is able to check to check that each turn signal lamp turns on.

HORN

This test is able to check to check that the horn sounds.

BCS

U1000 CAN COMM CIRCUIT

BCS-33

< COMPONENT DIAGNOSIS >

COMPONENT DIAGNOSIS

U1000 CAN COMM CIRCUIT

Description

INFOID:0000000001612399

CAN (Controller Area Network) is a serial communication line for real time applications. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Modern
vehicle is equipped with many electronic control unit, and each control unit shares information and links with
other control units during operation (not independent). In CAN communication, control units are connected
with 2 communication lines (CAN H-line, CAN L-line) allowing a high rate of information transmission with less
wiring. Each control unit transmits/receives data but selectively reads required data only.
CAN Communication Signal Chart. Refer to

LAN-25, "CAN Communication Signal Chart"

DTC Logic

INFOID:0000000001612400

DTC DETECTION LOGIC

Diagnosis Procedure

INFOID:0000000001612401

PERFORM SELF DIAGNOSTIC

Turn ignition switch ON and wait for 2 seconds or more.

Check “Self Diagnostic Result”.

Is “CAN COMM CIRCUIT” displayed?

YES

>> Refer to