ignition INFINITI FX35 2006 Service Manual

LOW TIRE PRESSURE WARNING SYSTEM WT-11
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Revision: 2006 December 2006 FX35/FX45
BCM (BODY CONTROL MODULE)
The BCM reads the air pressure signal received by the remote key-
less entry receiver, and controls the low tire pressure warning lamp
and the buzzer operations. It also has a judgement function to detect
a system malfunction.
LOW TIRE PRESSURE WARNING LAMP
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 and buzzer are activated.
Low Tire pressure Warning Lamp Indication
Note 1: Standard air pressure is for 220 kpa (2.2 kg/cm2 , 32 psi) vehicles.
DISPLAY UNIT
Displays the air pressure of each tire.

After the ignition switch is turned ON, the pressure values are
not displayed until the data of each wheel stabilizes.
SEIA0591E
SEIA0434E
Condition Warning lamp Buzzer
Less than 178 kPa (1.78 kg/cm
2 , 26 psi) [Note 1] ON Sounds for 10 sec.
Low tire pressure warning system malfunction [Other diagnostic item] Warning lamp flashes 1 min,
then turns ON OFF
SKIA5994E

TROUBLE DIAGNOSES WT-17
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Revision: 2006 December 2006 FX35/FX45
Control Unit Input/Output Signal StandardNES000GU
Standards using a circuit tester and oscilloscope
Terminal Item Condition Voltage (V)
Approx. value
+ (wire color) –
15 (G)
Ground Tire pressure warning check
connector Always 5V
18 (B) Remote keyless entry receiver
(Ground) —0V
19 (R) Remote keyless entry receiver
(Power supply) Stand-by
Press any of the key fob
switches
20 (Y) Remote keyless entry receiver
(Signal) Stand-by
Press any of the key fob
switches
38 (W/L) Ignition switch Ignition switch ON or START Battery voltage (12V) 39 (L) CAN-H — —
40 (P) CAN-L — —
42 (L/R) Battery power supply (Fuse) Always Battery voltage (12V)
45 (G/W) Turn signal (left)

Ignition switch ON

Combination switch is turn
signal (left)
OCC3879D
OCC3882D
OCC3881D
OCC3880D
SKIA3009J

WT-18
TROUBLE DIAGNOSES
Revision: 2006 December 2006 FX35/FX45
ID Registration ProcedureNES000GV
ID REGISTRATION WITH ACTIVATION TOOL
This procedure must be done after replacement of a transmitter or BCM.
CAUTION:
If CONSULT-II is used with no connection of CONSULT-II CONVERTER, malfunction might be detected
during self-diagnosis depending on control unit which performs CAN communication.
1. With the ignition switch OFF, connect CONSULT-II and CONSULT-II CONVERTER to the data link con- nector, then turn the ignition switch ON.
2. Select “START (NISSAN BASED VHCL)”.
3. Select “BCM” on “SELECT SYSTEM” screen. NOTE:
If “BCM” is not indicated, go to GI-39, "
CONSULT-II Data Link Connector (DLC) Circuit" .
4. Select “AIR PRESSURE MONITOR” on “SELECT WORK ITEM” screen.
5. Select “WORK SUPPORT” on “SELECT DIAG MODE” screen, and select “ID REGIST”.
6. With the activation tool (J-45295) pushed against the front-left transmitter position of the tire air valve, press and hold the but-
ton 5 seconds.
7. Register the IDs in order from FR LH, FR RH, RR RH or RR LH. When ID registration of each wheel has been completed, a buzzer sounds and turn signal lamp (LH/ RH) blinks.
8. After completing all ID registrations, press “END” to complete the procedure.
NOTE:
Be sure to register the IDs in order from FR LH, FR RH, RR RH, to RR LH, or the self-diagnostic results dis-
play will not function properly.
46 (BR/W)
Ground Turn signal (right)

Ignition switch ON

Combination switch is turn
signal (right)
49 (B) Ground — 0V
52 (B)
55 (G) Battery power supply (F/L) Always Battery voltage (12V) Te r m i n a l
Item Condition Voltage (V)
Approx. value
+ (wire color) –
SKIA3009J
SEIA0460E
Activation tire position Buzzer Turn signal lamp CONSULT-II
1 Front LH Once
2 times flashing “YET”
↓
“DONE”
2Front RH 2 times
3Rear RH 3 times
4 Rear LH 4 times

TROUBLE DIAGNOSES WT-19
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Revision: 2006 December 2006 FX35/FX45
ID REGISTRATION WITHOUT ACTIVATION TOOL
This procedure must be done after replacement of a transmitter or BCM.
CAUTION:
If CONSULT-II is used with no connection of CONSULT-II CONVERTER, malfunction might be detected
during self-diagnosis depending on control unit which performs CAN communication.
1. With the ignition switch OFF, connect CONSULT-II and CONSULT-II CONVERTER to the data link con- nector, then turn the ignition switch ON.
2. Select “START (NISSAN BASED VHCL)”.
3. Select “BCM” on “SELECT SYSTEM” screen. NOTE:
If “BCM” is not indicated, go to GI-39, "
CONSULT-II Data Link Connector (DLC) Circuit" .
4. Select “AIR PRESSURE MONITOR” on “SELECT WORK ITEM” screen.
5. Select “WORK SUPPORT” on “SELECT DIAG MODE” screen, and select “ID REGIST”.
6. Adjust the tire pressure to the values shown in the table below for ID registration, and drive the vehicle at 40 km/h (25 MPH) or more for a few minutes.
7. After completing all ID registrations, press “END” to complete the procedure.
8. Inflate all tires to proper pressure. Refer to WT-39, "
Tire" .
Tire position
Tire pressure kPa (kg/cm2 , psi)
Front − Left 240 (2.4, 34)
Front − Right 220 (2.2, 31)
Rear − Right 200 (2.0, 29)
Rear − Left 180 (1.8, 26)
Activation tire position CONSULT-II
Front LH “YET” ↓
“DONE”
Front RH
Rear RHRear LH

WT-20
TROUBLE DIAGNOSES
Revision: 2006 December 2006 FX35/FX45
Transmitter Wake Up OperationNES000GW
WITH ACTIVATION TOOL
1. With the activation tool (J-45295) pushed against the front-left transmitter, press the button for 5 seconds.

When ignition switch ON, as the low tire pressure warning
lamp blinks per the following diagram, the respective transmit-
ter then must be woken up.
2. Register the ID of wheel that warning lamp flashes. When wake up of registered wheel has been com- pleted, turn signal lamp flashes two times.
3. After completing wake up all transmitters, make sure low tire pressure warning lamp goes out.
SEIA0460E
SEIA0378E

TROUBLE DIAGNOSES WT-21
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Revision: 2006 December 2006 FX35/FX45
Self-DiagnosisNES000GX
DESCRIPTION
During driving, the low tire pressure warning system receives the signal transmitted from the transmitter
installed in each wheel, and gives alarms when the tire pressure becomes low. The control unit (BCM) of this
system has pressure judgement and trouble diagnosis functions.
FUNCTION
When the low tire pressure warning system detects low inflation pressure or another unusual symptom, the
warning lamps in the combination meter comes on. To start the self-diagnostic results mode, ground terminal
of the tire pressure warning check connector. The malfunction location is indicated by the warning lamp flash-
ing and the buzzer sounds.
LOW TIRE PRESSURE WARNING LAMP DIAGNOSTIC CHART
Diagnosis
Item Symptom
(Ignition switch ON) Low tire pressure warning lamp Cause Action
Low tire pres-
sure warning
lamp Warning lamp comes
on immediately and
turns off after 1 sec-
ond All wheel transmit-
ters are “activated”
(working). None (system OK)
Warning lamp blinks
on for 2 seconds,
then turns off for 0.2
seconds-repeats All wheel transmit-
ters are not acti-
vated. Activate all wheel transmit-
ters. Refer to WT-20,
"Transmitter Wake Up Oper-
ation" .
Warning lamp blinks
1 time Front LH wheel
transmitter is not
activated. Activate front LH wheel
transmitter. Refer to WT-20,
"Transmitter Wake Up Oper-
ation" .
Warning lamp blinks
2 times Front RH wheel
transmitter is not
activated. Activate front RH wheel
transmitter. Refer to WT-20,
"Transmitter Wake Up Oper-
ation" .
Warning lamp blinks
3 times Rear RH wheel
transmitter is not
activated. Activate rear RH wheel
transmitter. Refer to WT-20,
"Transmitter Wake Up Oper-
ation" .
SEIA0592E
SEIA0593E
SEIA0594E
SEIA0595E
SEIA0596E

WT-22
TROUBLE DIAGNOSES
Revision: 2006 December 2006 FX35/FX45
NOTE:
If more than one wheel transmitter is NOT activated, the warning lamp blinking patterns for those wheels will combine. (Example : one
blink/OFF/three blinks = Rear LH and Rear RH transmitters are not activated.)
CONSULT-II FunctionNES000KR
FUNCTION
CONSULT-II can display each self-diagnostic item using the diagnostic test modes shown following.
CONSULT-II SETTING PROCEDURE
Refer to GI-38, "CONSULT-II Start Procedure" .
Low tire pres-
sure warning
lamp Warning lamp blinks
4 times Rear LH wheel
transmitter is not
activated. Activate rear LH wheel
transmitter. Refer to WT-20,
"Transmitter Wake Up Oper-
ation" .
Warning lamp comes
on and does not turn
off The fuse for combi-
nation meter from
battery is pulled out. Check the fuse for combina-
tion meter from battery.
Install or replace (if needed).
BCM connector
pulled out. Check BCM connector. Re-
connect if needed.
Low tire pressure or
low tire pressure
warning system mal-
function.

Perform CONSULT-II Self
Diagnosis. Refer to WT-
21, "Self-Diagnosis" .
–Perform ID Registration if
needed. Refer to WT-18,
"ID Registration Proce-
dure" .
Turn signal
lamp Turn signal lamp
does not flash 2
times or horn does
not sound after trans-
mitter activation. 1. Tool J-45295 (spe-
cial service tool)
battery low.
2. Ignition OFF dur- ing activation.
3. Tool J-45295 (spe- cial service tool)
not positioned cor-
rectly.
4. Transmitters already activated. 1. Install new battery.
2. Make sure ignition is ON during activation.
3. Position tool correctly dur- ing activation.
4. None
Diagnosis
Item Symptom
(Ignition switch ON) Low tire pressure warning lamp Cause Action
SEIA0597E
SEIA0598E
Diagnostic test mode Function Reference
WORK SUPPORT This mode enables a technician to adjust some devices faster and more accu-
rately by following the indications on CONSULT-II. WT-23, "
WORK SUP-
PORT MODE".
SELF-DIAGNOSTIC
RESULTS Self-diagnostic results can be read and erased quickly. WT-23, "
SELF-DIAGNOS-
TIC RESULTS MODE".
DATA MONITOR Input/Output data in the control unit can be read. WT-24, "
DATA MONITOR
MODE".
ACTIVE TEST Diagnostic Test Mode in with CONSULT-II drives some actuators apart from
the control unit (BCM) and also shifts some parameters in a specified range. WT-24, "
ACTIVE TEST
MODE".

WT-24
TROUBLE DIAGNOSES
Revision: 2006 December 2006 FX35/FX45
NOTE:
Before performing the self-diagnosis, be sure to register the ID, or else the actual malfunction location may be different from that dis-
played on CONSULT-II.
DATA MONITOR MODE
NOTE:
Before performing the self-diagnosis, be sure to register the ID, or else the actual malfunction location may be different from that dis-
played on CONSULT-II.
ACTIVE TEST MODE
NOTE:
Before performing the self-diagnosis, be sure to register the ID, or else the actual malfunction location may be
different from that displayed on CONSULT-II.
Operation Procedure
1. Touch necessary test item.
2. The “Active Test” screen will be displayed, so perform the follow- ing test.
Test Item

Flasher

Horn

Warning lamp

ID regist warning

Flat tire warning
[BATT - VOLT - LOW] - FL
[BATT - VOLT - LOW] - FR
[BATT - VOLT - LOW] - RR
[BATT - VOLT - LOW] - RL Battery voltage of front-left transmitter drops.
Battery voltage of front-right transmitter drops.
Battery voltage of rear-right transmitter drops.
Battery voltage of rear-left transmitter drops.
VHCL_SPEED_SIG_ERR Vehicle speed signal is error. Diagnostic item Diagnostic item is detected when ···
MONITOR CONDITION SPECIFICATION
VEHICLE SPEED Drive vehicle. Vehicle speed (km/h or MPH)
AIR PRESS FL
AIR PRESS FR
AIR PRESS RR
AIR PRESS RL

Drive vehicle for a few minutes.
Tire pressure (kPa or Psi)
or

Ignition switch ON and activation tool
is transmitting activation signals.
ID REGST FL 1
ID REGST FR 1
ID REGST RR 1
ID REGST RL 1 Ignition switch ON Registration ID: DONE
No registration ID: YET
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
SEIA0585E

WT-28
TROUBLE DIAGNOSES
Revision: 2006 December 2006 FX35/FX45
Preliminary CheckNES000GZ
BASIC INSPECTION
1. CHECK ALL TIRE PRESSURES

Check all tire pressures. Refer to WT-39, "Tire" .
OK or NG
OK >> GO TO 2.
NG >> Adjust tire pressure to specified value.
2. CHECK LOW TIRE PRESSURE WARNING LAMP ACTIVATION
1. Check low tire pressure warning lamp activation.
2. Does low tire pressure warning lamp activate for 1 second when ignition switch is turned “ON”?
Does warning lamp activate?
YES >> GO TO 3.
NO >> Check fuse and combination meter.
3. CHECK CONNECTOR
1. Disconnect BCM harness connectors M3 and M4.
2. Check terminals for damage or loose connection.
OK or NG
OK >> GO TO 4.
NG >> Repair or replace damaged parts.
4. CHECK TRANSMITTER TOOL

Check activation tool battery.
OK or NG
OK >> Perform self-diagnosis.
NG >> Replace activation tool battery.

TROUBLE DIAGNOSES WT-29
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Revision: 2006 December 2006 FX35/FX45
Malfunction Code/Symptom ChartNES000H0
Code/Symptom Malfunction part Reference
page
15
16
17
18 Front-left tire pressure drops to 178 kPa (1.78 kg/cm
2 , 26 psi) or less.
Front-right tire pressure drops to 178 kPa (1.78 kg/cm2 , 26 psi) or less.
Rear-right tire pressure drops to 178 kPa (1.78 kg/cm2 , 26 psi) or less.
Rear-left tire pressure drops to 178 kPa (1.78 kg/cm2 , 26 psi) or less. —
21
22
23
24 Transmitter no data (front - left)
Transmitter no data (front - right)
Transmitter no data (rear - right)
Transmitter no data (rear - left) WT-30
31
32
33
34 Transmitter checksum error (front - left)
Transmitter checksum error (front - right)
Transmitter checksum error (rear - right)
Transmitter checksum error (rear - left) WT-30
35
36
37
38 Transmitter pressure data error (front - left)
Transmitter pressure data error (front - right)
Transmitter pressure data error (rear - right)
Transmitter pressure data error (rear - left) WT-31
41
42
43
44 Transmitter function code error (front - left)
Transmitter function code error (front - right)
Transmitter function code error (rear - right)
Transmitter function code error (rear - left) WT-30
45
46
47
48 Transmitter battery voltage low (front - left)
Transmitter battery voltage low (front - right)
Transmitter battery voltage low (rear - right)
Transmitter battery voltage low (rear - left) WT-30
52 Vehicle speed signal
WT-32
Warning lamp does not come on when
ignition switch is turned on. Fuse or combination meter
BCM connector or circuit
BCM WT-33
Warning lamp stays on when ignition
switch is turned on. Combination meter
BCM connector or circuit
BCM WT-33
Warning lamp blinks when ignition switch
is turned on. BCM connector or circuit
BCM
Transmitter's mode off
ID registration not yet WT-35
Turn signal lamp blinks when ignition
switch is turned on. BCM connector or circuit
BCM WT-36
ID registration can not be operated. Transmitter
Remote keyless entry receiver connector or circuit
Remote keyless entry receiver
BCM connector or circuit
BCM WT-36