control INFINITI M35 2007 Factory Service Manual

WT-10
TIRE PRESSURE MONITORING SYSTEM
Revision: 2007 April2007 M35/M45
RECEIVER
The receiver receives the air pressure signal transmitted by the transmitter in each wheel.
LOW TIRE PRESSURE WARNING CONTROL UNIT
The low tire pressure warning control unit (1) reads the air pressure
signal received by the receiver, and controls the low tire pressure
warning lamp operations. It also has a judgementfunction to detect a
system malfunction.
LOW TIRE PRESSURE WARNING LAMP
The combination meter receives tire pressure status from the low tire
pressure warning control unit using CAN communication. When a
low tire pressure condition is sensed by the low tire pressure warn-
ing control unit, the combination meter low tire pressure warning
lamp is activated.
Low Tire Pressure Warning Lamp Indication
*: Standard air pressure is for 230 kpa (2.3 kg/cm2 , 33 psi) vehicle. 1. Tire pressure receiver front 2. Tire pressure receiver rear A. Front wheel house
A. Front wheel house
B. Rear wheel house
Refer to GI-11, "
Components" , for the symbols in the figure.
SEIA0649E
SEIA0650E
SEIA0434E
Condition Low tire pressure warning lamp
Less than 182 kPa (1.82 kg/cm
2 , 26.5 psi) [Flat tire]*ON
Low tire pressure warning system malfunction [Other diagnostic item] Warning lamp blinks 1 min, then turns ON

TIRE PRESSURE MONITORING SYSTEM
WT-11
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Revision: 2007 April2007 M35/M45
DISPLAY UNIT
Display the air pressure of each tire.

After the ignition switch is turned ON, the pressure values are
not be displayed until the data of wheels stabilizes.
Can CommunicationNES000KV
CAN (Controller Area Network) is a serial communication line 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.
For details, refer to LAN-50, "
CAN System Specification Chart" .
SEIA0651E

WT-12
TROUBLE DIAGNOSES
Revision: 2007 April2007 M35/M45
TROUBLE DIAGNOSESPFP:00004
How to Perform Trouble DiagnosesNES000JU
BASIC CONCEPT

The most important point to perform trouble diagnosis is to understand systems (control and mechanism)
in vehicle thoroughly.

It is also important to clarify customer complaints before inspec-
tion.
First of all, reproduce symptom, and understand it fully.
Ask customer about his/her complaints carefully. In some cases,
they will be necessary to check symptom by driving vehicle with
customer.
CAUTION:
Customers are not professionals. Do not assume “maybe
customer means...” or “maybe the customer mentioned this
symptom”.

It is essential to check symptoms right from beginning in order to
repair a malfunction completely.
For an intermittent malfunction, it is important to reproduce
symptom based on interview with customer and past examples.
Do not perform inspection on ad hoc basis. Most intermittent
malfunctions are caused by poor contacts. In this case, it will be
effective to shake suspected harness or connector by hand.
When repairs are performed without any symptom check, no
one can judge if malfunction has actually been eliminated.

Always diagnosis, make sure to perform “ERASE MEMORY”.

Always read “GI General information” to confirm general precau-
tions. Refer to GI-4, "
General Precautions" .
EFJ0028D
SEF233G

TROUBLE DIAGNOSES
WT-17
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Revision: 2007 April2007 M35/M45
Low Tire Pressure Warning Control Unit Input/Output Signal StandardNES000JX
CAUTION:
When checked using a circuit tester for voltage measurement, connector terminals should not be
forcefully extended.
Terminal
Measuring point Measuring condition Standard
+
(wire color)–
2 (B/R)
GroundIgnition switch Ignition switch ON Battery voltage (12 V)
5 (W/R)Tire pressure warning check
connectorAlways Approx. 5 V
7 (LG)
Battery power supply
Ignition switch ONBattery voltage (12 V) 8 (R/W)
9 (GR)
10 (SB)
11 (W/G)
Signal Input Approx. 4.5 V 12 (R)
13 (L)
14 (L/G)
15 (L) CAN-H — —
16 (P) CAN-L — —
17 (B) Ground — 0 V
19 (G/R) HazardHazard lamp switch OFF Battery voltage (Approx. 12 V)
Hazard lamp switch ON 0 V
23 (BR)
Ground—0 V
24 (W/L) — 0 V
25 (B/R) — 0 V
26 (V) — 0 V
27 (O)
Analog signal Ignition switch ON Approx. 0.7 V 28 (G)
29 (P)
30 (L/R)

WT-18
TROUBLE DIAGNOSES
Revision: 2007 April2007 M35/M45
ID Registration ProcedureNES000JY
ID REGISTRATION WITH ACTIVATION TOOL
This procedure must be done after replacement of a tire pressure transmitter, low tire pressure warn-
ing control unit, or tire rotation.
1. Perform “CONSULT-II Start Procedure”. Refer to GI-38, "
CONSULT-II Start Procedure" .
2. Touch “WORK SUPPORT” on “SELECT DIAG MODE” screen.
3. Touch “ID REGIST” on “SELECT WORK ITEM”.
4. With the activation tool (J-45295) pushed against the front-left
tire pressure transmitter position of the tire air valve, press and
hold the button for 5 seconds.
5. Register the IDs in order from FR LH, FR RH, RR RH, RR LH.
When ID registration of each wheel has been completed, turn
signal lamp blinks.
6. 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-diagnosis results
display will not function properly.
ID REGISTRATION WITHOUT ACTIVATION TOOL
This procedure must be done after replacement of a tire pressure transmitter, low tire pressure warn-
ing control unit, or tire rotation.
1. Perform “CONSULT-II Start Procedure”. Refer to GI-38, "
CONSULT-II Start Procedure" .
2. Touch “WORK SUPPORT” on “SELECT DIAG MODE” screen.
3. Touch “ID REGIST” on “SELECT WORK ITEM”.
4. 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.
5. After completing all ID registrations, press “END” to complete the procedure.
6. Inflate all tires to proper pressure. Refer to WT-41, "
SERVICE DATA AND SPECIFICATIONS (SDS)" .
SEIA0460E
Activation tire position Turn signal lamp CONSULT-II
1 Front LH
2 times flashing“YET”
↓
“DONE” 2 Front RH
3Rear RH
4 Rear LH
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 LH 180 (1.8, 26)
Activation tire position CONSULT-II
Front LH
“YET”
↓
“DONE” Front RH
Rear RH
Rear LH

TROUBLE DIAGNOSES
WT-19
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Revision: 2007 April2007 M35/M45
Transmitter Wake Up OperationNES000JZ
WITH TRANSMITTER ACTIVATION TOOL
1. With the activation tool (J-45295) pushed against the front-left
transmitter, press and hold the button for 5 seconds.

When ignition switch ON, as the low tire pressure warning
lamp blinks per the follow diagram, the respective transmitter
then must be wake 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.
CONSULT-II Function (AIR PRESSURE MONITOR)NES000K0
DESCRIPTION
CONSULT-II can display each diagnostic item using the diagnostic test modes shown following.
CONSULT-II SETTING PROCEDURE
Refer to GI-38, "CONSULT-II Start Procedure" .
SEIA0460E
SEIA0378E
Diagnostic test mode Function Reference
WORK SUPPORTThis mode enables a technician to adjust some devices faster and more
accurately by following the indications on CONSULT-II.WT-20, "
WORK SUP-
PORT MODE"
SELF-DIAG RESULTSReceives self-diagnosis results from low tire pressure warning control
unit and indicates DTCs. WT-20, "SELF-DIAG
RESULT MODE"
DATA MONITORReceives input/output signals from low tire pressure warning control
unit and indicates and stores them to facilitate locating cause of mal-
functions.WT-21, "DATA MONITOR
MODE"
CAN DIAG SUPPORT MNTR Monitors transmitting/receiving status of CAN communication.LAN-44, "CAN Diagnostic
Support Monitor"
ACTIVE TESTDiagnostic Test Mode in with CONSULT-II drives some actuators apart
from the low tire pressure warning control unit and also shifts some
parameters in a specified range.WT-22, "ACTIVE TEST
MODE"
ECU PART NUMBER Displays low tire pressure warning control unit part number. WT-22, "
LOW TIRE PRES-
SURE WARNING CON-
TROL UNIT PART
NUMBER"

WT-20
TROUBLE DIAGNOSES
Revision: 2007 April2007 M35/M45
WORK SUPPORT MODE
Operation Procedure
1. Perform “CONSULT-II Start Procedure”. Refer to GI-38, "CONSULT-II Start Procedure" .
2. Perform the “ID Regist”. Refer to WT-18, "
ID Registration Procedure" .
SELF-DIAG RESULT MODE
Operation Procedure
1. Perform “CONSULT-II Start Procedure”. Refer to GI-38, "CONSULT-II Start Procedure" .
2. The self-diagnostic results are displayed. (Touch “PRINT” to print out the self-diagnostic results if neces-
sary.) Check low tire pressure warning lamp if “NO FAILURE” is displayed.
3. Perform the appropriate inspection from the display item list, and repair or replace the malfunctioning
component. Refer to WT-20, "
Display Item List" .
Display Item List
DTCItems
(CONSULT-II screen terms)Diagnostic item is detected when ···Check
items
C1704 LOW PRESSURE FL
Front LH tire pressure drops to * kPa (* kg/cm
2 , * psi) or less. (Notice)
— C1705 LOW PRESSURE FR
Front RH tire pressure drops to * kPa (* kg/cm
2 , * psi) or less. (Notice)
C1706 LOW PRESSURE RR
Rear RH tire pressure drops to * kPa (* kg/cm
2 , * psi) or less. (Notice)
C1707 LOW PRESSURE RL
Rear LH tire pressure drops to * kPa (* kg/cm
2 , * psi) or less. (Notice)
C1708 [NO DATA] FL Data from front LH transmitter cannot be received.
WT-29
C1709 [NO DATA] FR Data from front RH transmitter cannot be received.
C1710 [NO DATA] RR Data from rear RH transmitter cannot be received.
C1711 [NO DATA] RL Data from rear LH transmitter cannot be received.
C1716 [PRESSDATA ERR] FL Air pressure data from front LH transmitter is malfunctioning.
WT-31
C1717 [PRESSDATA ERR] FR Air pressure data from front RH transmitter is malfunctioning.
C1718 [PRESSDATA ERR] RR Air pressure data from rear RH transmitter is malfunctioning.
C1719 [PRESSDATA ERR] RL Air pressure data from rear LH transmitter is malfunctioning.
C1720 [CODE ERROR] FL Function code data from front LH transmitter is malfunctioning.
WT-32
C1721 [CODE ERROR] FR Function code data from front RH transmitter is malfunctioning.
C1722 [CODE ERROR] RR Function code data from rear RH transmitter is malfunctioning.
C1723 [CODE ERROR] RL Function code data from rear LH transmitter is malfunctioning.
C1724 [BATT VOLT LOW] FL Battery voltage of front LH transmitter drops.
WT-32
C1725 [BATT VOLT LOW] FR Battery voltage of front RH transmitter drops.
C1726 [BATT VOLT LOW] RR Battery voltage of rear RH transmitter drops.
C1727 [BATT VOLT LOW] RL Battery voltage of rear LH transmitter drops.
C1728 RECEIVER ID NO REG ID registration of receiver is not completed.WT-33
C1729 VHCL SPEED SIG ERR Vehicle speed signal is error.WT-33
C1750 [RECEIVER ERR] FL Data from front LH receiver cannot be received.
WT-30
C1751 [RECEIVER ERR] FR Data from front RH receiver cannot be received.
C1752 [RECEIVER ERR] RR Data from rear RH receiver cannot be received.
C1753 [RECEIVER ERR] RL Data from rear LH receiver cannot be received.
C1754 CONTROL UNIT (EEPROM)When the malfunction is detected in low tire pressure warning control
unit memory [CONTROL UNIT (EEPROM)] function.WT-34
U1000 CAN COMM CIRCUITWhen a low tire pressure warning control unit is not transmitting or
receiving CAN communication signal 2 seconds or more. WT-34
U1010 CONTROL UNIT [CAN]When detecting error during the initial diagnosis of CAN controller of
low tire pressure warning control unit.WT-34

WT-22
TROUBLE DIAGNOSES
Revision: 2007 April2007 M35/M45
ACTIVE TEST MODE
Operation Procedure
1. Perform “CONSULT-II Start Procedure”. Refer to GI-38, "CONSULT-II Start Procedure" .
2. “ACTIVE TEST” is displayed.
Display Item List
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.
LOW TIRE PRESSURE WARNING CONTROL UNIT PART NUMBER
Operation Procedure
1. Perform “CONSULT-II Start Procedure”. Refer to GI-38, "CONSULT-II Start Procedure" .
2. The part number described on low tire pressure warning control unit sticker is displayed.
Diagnosis Procedure with Warning Lamp Function (Without CONSULT-II)NES000K6
DESCRIPTION
During driving, the tire pressure monitoring system receives the signal transmitted from the transmitter
installed in each wheel when the tire pressure becomes low. The control unit (low tire pressure warning control
unit) of this system has pressure judgement and trouble diagnosis functions.
FUNCTION
When the tire pressure monitoring 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. Regarding location of tire pressure warning check connector, refer to PG-62, "
HARNESS" .
Test item Content
BUZZER This test is able to check to make sure that the buzzer sounds.
WARNING LAMP This test is able to check to make sure that the warning lamp turns on.

WT-24
TROUBLE DIAGNOSES
Revision: 2007 April2007 M35/M45
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 = Tire pressure transmitter rear LH and rear RH are not activated.)Low tire pres-
sure warning
lampWarning light blinks
4 times.Tire pressure trans-
mitter rear LH is not
activated.Activate tire pressure trans-
mitter rear LH. Refer to WT-
19, "Transmitter Wake Up
Operation" .
Warning light comes
on and does not turn
off.Tire pressure is low.Check tire pressure with
CONSULT-II. Refer to WT-21,
"DATA MONITOR MODE" .
Warning light blinks
on for 0.5 seconds
then turns off for 0.5
seconds-repeats for
1 minute, and then
stays onThe fuse for low tire
pressure warning
control unit from bat-
tery is pulled out.Check the fuse for low tire
pressure warning control unit
from battery. Install or replace
(if needed).
Low tire pressure
warning control unit
connector pulled outCheck low tire pressure warn-
ing control unit connector. Re-
connect if needed.
Tire pressure moni-
toring system mal-
function.

Perform CONSULT-II Self-
Diagnosis. Refer to WT-20,
"SELF-DIAG RESULT
MODE" .
–Perform ID Registration if
needed. Refer to WT-18,
"ID Registration Procedure"
.
Turn signal
lampTurn signal lamp
does not flash 2
times after transmit-
ter activation.—1. Tool J-45295
[SST]
2. Ignition OFF dur-
ing activation.
3. Tool J-45295
[SST] not posi-
tioned correctly.
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
ItemSymptom
(Ignition switch ON)Low tire pressure warning lamp Cause Action
SEIA0597E
SEIA0598E
SEIA0788E

WT-26
TROUBLE DIAGNOSES
Revision: 2007 April2007 M35/M45
Preliminary CheckNES000K8
BASIC INSPECTION
1. CHECK ALL TIRE PRESSURES
Check all tire pressures. Refer to WT-41, "
SERVICE DATA AND SPECIFICATIONS (SDS)" .
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. Refer to DI-5, "
COMBINATION METERS" .
3. CHECK CONNECTOR
1. Disconnect low tire pressure warning control unit harness connectors M19.
2. Check terminals for damage or loose connection.
OK or NG
OK >> GO TO 4.
NG >> Repair or replace damaged parts.
4. CHECK ACTIVATION TOOL
Check activation tool battery.
OK or NG
OK >> Perform self-diagnosis.
NG >> Replace activation tool battery.