2007 INFINITI M35 control unit

WT-1
ROAD WHEELS & TIRES
E SUSPENSION
CONTENTS
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Revision: 2007 April2007 M35/M45
ROAD WHEELS & TIRES
PRECAUTIONS .......................................................... 3
Precautions .............................................................. 3
PREPARATION ........................................................... 4
Special Service Tools ............................................... 4
Commercial Service Tools ........................................ 4
NOISE, VIBRATION AND HARSHNESS (NVH)
TROUBLESHOOTING ................................................ 5
NVH Troubleshooting Chart ..................................... 5
ROAD WHEEL ............................................................ 6
Inspection ................................................................. 6
ALUMINUM WHEEL ............................................. 6
STEEL WHEEL ..................................................... 6
ROAD WHEEL AND TIRE ASSEMBLY ..................... 7
Balancing Wheels (Bonding Weight Type) ............... 7
REMOVAL ............................................................. 7
WHEEL BALANCE ADJUSTMENT ...................... 7
Rotation .................................................................... 8
TIRE PRESSURE MONITORING SYSTEM ............... 9
System Components ................................................ 9
System Description .................................................. 9
TRANSMITTER ..................................................... 9
RECEIVER .......................................................... 10
LOW TIRE PRESSURE WARNING CONTROL
UNIT .................................................................... 10
LOW TIRE PRESSURE WARNING LAMP ......... 10
DISPLAY UNIT ..................................................... 11
Can Communication ................................................ 11
TROUBLE DIAGNOSES .......................................... 12
How to Perform Trouble Diagnoses ....................... 12
BASIC CONCEPT ............................................... 12
Schematic .............................................................. 13
Wiring Diagram — T/WARN — .............................. 14
Low Tire Pressure Warning Control Unit Input/Out-
put Signal Standard ................................................ 17
ID Registration Procedure ...................................... 18
ID REGISTRATION WITH ACTIVATION TOOL ... 18
ID REGISTRATION WITHOUT ACTIVATION
TOOL .................................................................. 18
Transmitter Wake Up Operation ............................. 19
WITH TRANSMITTER ACTIVATION TOOL ........ 19CONSULT-II Function (AIR PRESSURE MONI-
TOR) ....................................................................... 19
DESCRIPTION .................................................... 19
CONSULT-II SETTING PROCEDURE ................ 19
WORK SUPPORT MODE ................................... 20
SELF-DIAG RESULT MODE ............................... 20
DATA MONITOR MODE ...................................... 21
ACTIVE TEST MODE ......................................... 22
LOW TIRE PRESSURE WARNING CONTROL
UNIT PART NUMBER ......................................... 22
Diagnosis Procedure with Warning Lamp Function
(Without CONSULT-II) ............................................ 22
DESCRIPTION .................................................... 22
FUNCTION .......................................................... 22
LOW TIRE PRESSURE WARNING LAMP DIAG-
NOSTIC CHART .................................................. 23
How to Perform Trouble Diagnosis for Quick and
Accurate Repair ...................................................... 25
INTRODUCTION ................................................. 25
WORK FLOW ...................................................... 25
Preliminary Check .................................................. 26
Trouble Diagnosis Chart ......................................... 27
SELF-DIAGNOSIS .............................................. 27
DIAGNOSIS CHART BY SYMPTOM .................. 28
TROUBLE DIAGNOSIS FOR SYSTEM .................... 29
Transmitter no Data ................................................ 29
MALFUNCTION CODE NO. 21, 22, 23, 24 ......... 29
Receiver Data Error ................................................ 30
MALFUNCTION CODE NO. 25, 26, 27, 28 ......... 30
Transmitter Pressure Data Error ............................. 31
MALFUNCTION CODE NO. 35, 36, 37, 38 ......... 31
Transmitter Function Code Error ............................ 32
MALFUNCTION CODE NO. 41, 42, 43, 44 ......... 32
Transmitter Battery Voltage Low ............................. 32
MALFUNCTION CODE NO. 45, 46, 47, 48 ......... 32
Receiver ID No Registration ................................... 33
MALFUNCTION CODE NO. 51 ........................... 33
Vehicle Speed Signal .............................................. 33
MALFUNCTION CODE NO. 52 ........................... 33
Control Unit (EEPROM) Malfunction ...................... 34

WT-2Revision: 2007 April2007 M35/M45 MALFUNCTION CODE NO. 54 ........................... 34
CAN Communication System Malfunction .............. 34
TROUBLE DIAGNOSIS FOR SYMPTOMS .............. 35
Warning Lamp Does Not Come On When Ignition
Switch Is Turned ON ............................................... 35
Warning Lamp Stay On When Ignition Switch Is
Turned ON .............................................................. 35
Warning Lamp Blinks 1 Minute and Then Turns ON
When Ignition Switch Is Turned ON ........................ 36
Warning Lamp Blinks When Ignition Switch Is
Turned ON .............................................................. 37
Turn Signal Lamp Blinks When Ignition Switch Is
Turned ON .............................................................. 38
ID Registration Can Not Be Completed .................. 38REMOVAL AND INSTALLATION .............................. 39
Transmitter .............................................................. 39
REMOVAL ............................................................ 39
INSTALLATION .................................................... 39
Low Tire Pressure Warning Control Unit ................. 40
REMOVAL ............................................................ 40
INSTALLATION .................................................... 40
Receiver .................................................................. 40
REMOVAL ............................................................ 40
INSTALLATION .................................................... 40
SERVICE DATA AND SPECIFICATIONS (SDS) ...... 41
Road Wheel ............................................................ 41
Tire .......................................................................... 41

TIRE PRESSURE MONITORING SYSTEM
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TIRE PRESSURE MONITORING SYSTEMPFP:40720
System ComponentsNES000JR
System DescriptionNES000JS
TRANSMITTER
A sensor-transmitter integrated with a valve is installed on a wheel,
and transmits a detected air pressure signal in the form of a radio
wave.
1. Tire pressure transmitter front LH 2. Tire pressure transmitter front RH 3. Tire pressure receiver front LH
4. Tire pressure receiver front RH 5. Low tire pressure warning control
unit6. Low tire pressure warning lamp
7. Display unit 8. Tire pressure transmitter rear LH 9. Tire pressure transmitter rear RH
10. Tire pressure receiver rear LH 11. Tire pressure receiver rear RH
SEIA0648E
SEIA0521E

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
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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

TROUBLE DIAGNOSES
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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
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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"