INFINITI FX35 2008 Service Manual

TIRE PRESSURE MONITORING SYSTEMWT-11
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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 judgment 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 is activated.
Low Tire pressure Warning Lamp Indication
Note 1: Standard air pressure is for 220 kpa (2.2 kg/cm2, 32 psi) vehicles.
RUN-FLAT TIRE 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 run-frat tire warning
lamp and buzzer are activated.
Run-Flat Tire Warning Lamp Indication
SEIA0591E
SEIA0434E
Condition Warning lamp
Less than 173 kPa (1.8 kg/cm
2, 25 psi) [Note 1] ON
Low tire pressure warning system malfunction [Other diagnostic item] Warning lamp flashes 1 min, then turns ON
SEIA0792E
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WT-12
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TIRE PRESSURE MONITORING SYSTEM
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 notdisplayed until the data of each wheel stabilizes.
Condition Warning lamp
Less than 86 kPa (0.88 kg/cm
2, 12.5 psi) [Note 1] ON
JPEIC0024GB
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CAN COMMUNICATIONWT-13
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CAN COMMUNICATION
System DescriptionINFOID:0000000001327578
CAN (Controller Area Network) is a serial communication li ne for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many elec-
tronic control units are equipped onto a vehicle, 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.
Refer to LAN-43, "
CAN System Specification Chart".
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WT-14
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TROUBLE DIAGNOSES
TROUBLE DIAGNOSES
SchematicINFOID:0000000001327579
TEWM0162E
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TROUBLE DIAGNOSESWT-15
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Wiring Diagram- T/WARN -INFOID:0000000001327580
TEWM0149E
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WT-16
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TROUBLE DIAGNOSES
TEWM0150E
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TROUBLE DIAGNOSESWT-17
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Control Unit Input/Out put Signal StandardINFOID:0000000001327581
Standards using a circuit tester and oscilloscope
TEWM0163E
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WT-18
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TROUBLE DIAGNOSES
Te r m i n a lItem 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 keyfob switch-
es
20 (Y) Remote keyless entry receiver
(Signal) Stand-by
Press any of the keyfob switch-
es
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
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TROUBLE DIAGNOSESWT-19
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ID Registration ProcedureINFOID:0000000001327582
ID REGISTRATION WITH ACTIVATION TOOL
This procedure must be done after replacemen t of a transmitter, BCM or rotating wheels.
1. Touch “WORK SUPPORT” on “SELECT DIAG MODE” screen, and select “ID REGIST”.
2. With the transmitter activati on tool (J-45295) pushed against the
front-left transmitter position of the air valve, press and hold the
button 5 seconds.
3. Register the IDs in order from FR LH, FR RH, RR RH to RR LH. When ID registration of each wheel has been completed, turn
signal lamp blinks.
4. 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.
ID Registration without Tr ansmitter Activation Tool
CAUTION:
This procedure must be done after replacement of a transmitter, BCM, or rotating wheels.
1. Touch “WORK SUPPORT” on “SELECT DIAG MODE” screen, and select “ID REGIST”.
2. Adjust the tire pressure to the values shown in t he table below for ID registration, and drive the vehicle at
40 km/h (25 MPH) or more for several minutes.
NOTE:
If ID registration is unable, buzzer beeps.
3. After completing all ID registrations, press “END” to complete the procedure.
46 (BR/W) GroundTurn 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
Activation tire position Turn signal lamp CONSULT-IIII
1 Front LH
2 times flashing “Red”
↓
“Green”
2Front RH
3Rear RH
4 Rear LH
SEIA0460E
Tire position
Tire pressure kPa (kg/cm2 , psi)
Front LH 240 (2.4, 34)
Front RH 220 (2.2, 31) Rear RH 200 (2.0, 29)
Rear RH 180 (1.8, 26)
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WT-20
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TROUBLE DIAGNOSES
4. Inflate all tires to proper pressure. Refer to WT-35, "Tire".
Transmitter Wake Up OperationINFOID:0000000001327583
W I T H A C T I VAT I O N T O O L
1. With the transmitter 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 warninglamp blinks per the following diagram, the respective transmit-
ter then must be woken up.
2. Register the ID of wheel that low tire pressure warning lamp flashes. When wake up of registered wheel
has been completed, turn signal lamp flashes two times.
3. After completing wake up all transmitters, make sure low tire pressure warning lamp goes out.
Self-DiagnosisINFOID:0000000001327584
DESCRIPTION
During driving, the low tire pressure warning syste m 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 judgment 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 malf unction location is indicated by the warning lamp flash-
ing and the buzzer sounds.
LOW TIRE PRESSURE WARNING LAMP DIAGNOSTIC CHART
Activation tire position CONSULT-III
Front LH “Red”↓
“Green”
Front RH
Rear RHRear LH
SEIA0460E
SEIA0794E
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