2006 INFINITI M35 power steering

BL-268
IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-NATS)
Revision: 2006 January2006 M35/M45
CONSULT-IINIS0020N
CONSULT-II INSPECTION PROCEDURE
1. Turn ignition switch OFF.
2. Insert IVIS (NATS) program card into CONSULT-II.
3. Connect CONSULT-II and CONSULT-II CONVERTER to data
link connector (1).
6VSteering lock control
signal-1—Push-button ignition switch is pressed
under the condition that Intelligent Key is
in the vehicle or Intelligent Key is insertedBattery voltage
LOCKPower supply position is in LOCK posi-
tion
(Steering lock activated)Battery voltage 0 Battery volt-
age
(Battery voltage is detected when
activating the steering lock)
7LGSteering lock control
signal-2—Push-button ignition switch is pressed
under the condition that Intelligent Key is
in the vehicle or Intelligent Key is insertedBattery voltage
LOCKPower supply position is in LOCK posi-
tion
(Steering lock activated)Battery voltage
0 Battery volt-
age
(Battery voltage is detected when
activating the steering lock)
9OSteering lock feed
back signal—Power supply position is in ACC or ON
position0
LOCKPower supply position is in LOCK posi-
tion0
8 0
(0V is detected when activating the
steering lock)
10 B Ground — — 0
11 YIPDM E/R current sig-
nalSTART At starter motor cranking 5
LOCK Any condition other than above 2
12 R Feed back signalLOCKSleep condition (30 seconds or more
after all doors are closed under the con-
dition that the power supply position is in
the LOCK position)1
—Wake-up condition (any condition other
than above)0
13 R Starter relaySTART At starter motor cranking Battery voltage
— Any condition other than above 4
14 SB Power source (fuse) — — Battery voltage
15 LPower source (fusible
link)— — Battery voltage
17 GPower source (fusible
link)— — Battery voltage Te r -
minal
No.Wire
colorItemCondition
Voltage (V)
(Approx.) Push-
button
ignition
switch
positionOperation or conditions
Program card : NATS (AEN04D)
PBIB2712E

FRONT DISC BRAKE
BR-25
C
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G
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K
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MA
B
BR
Revision: 2006 January2006 M35/M45
Removal and Installation of Brake Caliper AssemblyNFS000PE
REMOVAL
1. Remove tires from vehicle with power tool.
2. Fasten disc rotor using wheel nut.
3. Drain brake fluid. Refer to BR-10, "
Drain and Refill" .
4. Remove union bolt, and then disconnect brake hose from caliper assembly.
5. Remove torque member mounting bolts, and remove brake cali-
per assembly.
CAUTION:
Do not drop brake pad.
6. Remove disc rotor.
CAUTION:
Put matching marks on wheel hub assembly and disc rotor,
if it is necessary to remove disc rotor.
INSTALLATION
CAUTION:
Refill with new brake fluid “DOT 3”.
Never reuse drained brake fluid.
1. Install disc rotor.
CAUTION:
Put alignment marks on disc rotor and wheel hub at the time of removal when reusing disc rotor.
2. Install brake caliper assembly to vehicle, and tighten torque member mounting bolts to the specified
torque. Refer to BR-23, "
Components" .
CAUTION:
Do not allow oil or any moisture on all contact surfaces between steering knuckle and caliper
assembly, bolts, and washer.
3. Install brake hose to brake caliper assembly, and tighten union
bolts to the specified torque. Refer to BR-13, "
Removal and
Installation of Front Brake Tube and Brake Hose" .
4. Refill with new brake fluid and bleed air. Refer to BR-11, "
Bleed-
ing Brake System" .
5. Check front disc brake for drag.
6. Install tires to vehicle.
SFIA2437E
SDIA2608E
SFIA2431E

BRC-1
BRAKE CONTROL SYSTEM
F BRAKES
CONTENTS
C
D
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M
SECTION BRC
A
B
BRC
Revision: 2006 January2006 M35/M45
BRAKE CONTROL SYSTEM
VDC/TCS/ABS
PRECAUTIONS .......................................................... 3
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” .................................................................. 3
Precautions for Procedures without Cowl Top Cover ..... 3
Precautions for Brake System .................................. 3
Precautions for Brake Control .................................. 4
PREPARATION ........................................................... 5
Special Service Tools ............................................... 5
Commercial Service Tools ........................................ 5
ON-VEHICLE SERVICE ............................................. 6
Adjustment of Steering Angle Sensor Neutral Posi-
tion ........................................................................... 6
SYSTEM DESCRIPTION ............................................ 7
System Diagram ....................................................... 7
Function ................................................................... 7
ABS ....................................................................... 7
EBD ....................................................................... 7
TCS ....................................................................... 7
VDC ....................................................................... 8
ECD ....................................................................... 8
Operation That Is Not "System Error" ...................... 8
ABS ....................................................................... 8
TCS ....................................................................... 8
VDC ....................................................................... 8
Fail-Safe Function .................................................... 8
ABS, EBD SYSTEM .............................................. 8
VDC / TCS ............................................................ 9
Hydraulic Circuit Diagram ........................................ 9
CAN COMMUNICATION .......................................... 10
System Description ................................................ 10
TROUBLE DIAGNOSIS .............................................11
How to Perform Trouble Diagnoses ........................ 11
BASIC CONCEPT ................................................ 11
DIAGNOSIS FLOW CHART ............................... 12
ASKING COMPLAINTS ...................................... 13
EXAMPLE OF DIAGNOSIS WORKSHEET ........ 13
Component Parts Location ..................................... 14
Schematic .............................................................. 15Wiring Diagram — VDC — ..................................... 16
CONSULT-II Functions (ABS) ................................ 22
CONSULT-II MAIN FUNCTION ........................... 22
CONSULT-II BASIC OPERATION PROCEDURE
... 22
Self-Diagnosis .....................................................
... 23
OPERATION PROCEDURE ................................ 23
ERASE MEMORY ............................................... 23
DISPLAY ITEM LIST ........................................... 24
Data Monitor ........................................................... 27
OPERATION PROCEDURE ................................ 27
DISPLAY ITEM LIST ........................................... 27
Active Test .............................................................. 30
OPERATION PROCEDURE ................................ 30
TEST ITEMS ....................................................... 31
For Fast and Accurate Diagnosis ........................... 32
PRECAUTIONS FOR DIAGNOSIS ..................... 32
Basic Inspection ..................................................... 33
BASIC INSPECTION 1: BRAKE FLUID LEVEL,
LEAK INSPECTION AND BRAKE PAD .............. 33
BASIC INSPECTION 2: LOOSENESS OF
POWER SYSTEM TERMINALS AND BATTERY ... 33
BASIC INSPECTION 3: ABS WARNING LAMP,
BRAKE WARNING LAMP, VDC OFF INDICATOR
LAMP AND SLIP INDICATOR LAMP .................. 33
Inspection 1: Wheel Sensor Circuit ........................ 34
Inspection 2: Engine System .................................. 36
Inspection 3: ABS Actuator and Electric Unit (Con-
trol Unit) .................................................................. 36
Inspection 4: ABS Actuator and Electric Unit (Con-
trol Unit) Power Supply and Ground Circuit ............ 37
Inspection 5: ABS Motor and Motor Relay Circuit ... 38
Inspection 6: Solenoid, VDC Change-Over Valve
and Actuator Relay Circuit ...................................... 40
Inspection 7: Pressure Sensor Circuit .................... 41
Inspection 8: Steering Angle Sensor Circuit ........... 41
Inspection 9: Park/Neutral Position (PNP) Switch
Circuit ..................................................................... 43
Inspection 10: Stop Lamp Switch Circuit ................ 44
Inspection 11: Yaw Rate/Side G Sensor Circuit ..... 45

BRC-26
[VDC/TCS/ABS]
TROUBLE DIAGNOSIS
Revision: 2006 January2006 M35/M45
Note 1: After completing repairs of shorted sensor circuit, when ignition switch is turned ON, ABS warning lamp turns on. Make sure that
ABS warning lamp turns off while driving vehicle at 30 km/h (19 MPH) or more for approximately 1 minute according to self-diagnosis
procedure. In addition, if wheel sensor 2 is displayed for wheels, check wheel sensor circuit and also check control unit power voltage.
Note 2: When malfunctions are detected in several systems, including CAN communication circuit [U1000], troubleshoot CAN communi-
cation circuit. Refer to BRC-51, "
Inspection 16: CAN Communication Circuit" . C1147 USV LINE [FL-RR]VDC switch-over solenoid valve (USV1) on the primary side is
open circuit or shorted, or the control line is open or shorted to
the power supply or the ground.
BRC-40,
"Inspection 6:
Solenoid, VDC
Change-Over
Valve and Actua-
tor Relay Circuit"
C1148 USV LINE [FR-RL]VDC switch-over solenoid valve (USV2) on the secondary side is
open circuit or shorted, or the control line is open or shorted to
the power supply or the ground.
C1149 HSV LINE [FL-RR]VDC switch-over solenoid valve (HSV1) on the primary side is
open circuit or shorted, or the control line is open or shorted to
the power supply or the ground.
C1150 HSV LINE [FR-RL]VDC switch-over solenoid valve (HSV2) on the secondary side is
open circuit or shorted, or the control line is open or shorted to
the power supply or the ground.
C1153 EMERGENCY BRAKEWhen ABS actuator and electric unit (control unit) is malfunction-
ing. (pressure increase is too much or too little)BRC-36,
"Inspection 3:
ABS Actuator
and Electric Unit
(Control Unit)"
C1154 PNP POS SIGTCM or ABS actuator and electric unit (control unit) internal mal-
function.BRC-43,
"Inspection 9:
Park/Neutral
Position (PNP)
Switch Circuit"
C1155 BR FLUID LEVEL LOWBrake fluid level is low or communication line between the ABS
actuator and electric unit (control unit) and brake fluid level switch
is open or shorted. BRC-48,
"Inspection 12:
Brake Fluid
Level Switch Cir-
cuit"
C1156 ST ANG SEN COM CIRCAN communication circuit or steering angle sensor is malfunc-
tioning.BRC-51, "Inspection 16:
CAN Communi-
cation Circuit"
C1170 VARIANT CODING In a case where VARIANT CODING is different.BRC-36,
"Inspection 3:
ABS Actuator
and Electric Unit
(Control Unit)"
C1185 ACC CONT ICC sensor integrated unit internal malfunction.BRC-50,
"Inspection 14:
ICC Sensor Inte-
grated Unit Cir-
cuit (With ICC)"
U1000 CAN COMM CIRCUIT When there is a malfunction in the CAN communication circuit.BRC-51,
"Inspection 16:
CAN Communi-
cation Circuit"
(Note 2)
U1100 ACC COMM CIRCUITWhen there is a malfunction in the CAN communication circuit or
ICC sensor integrated unit.BRC-51,
"Inspection 16:
CAN Communi-
cation Circuit"
Code Display item Malfunction detecting condition Check item

TROUBLE DIAGNOSIS
BRC-35
[VDC/TCS/ABS]
C
D
E
G
H
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K
L
MA
B
BRC
Revision: 2006 January2006 M35/M45
5. CHECK WHEEL SENSOR HARNESS
1. Turn ignition switch OFF and disconnect malfunctioning wheel
sensor connector E41(FR-RH), E59(FR-LH), B101(RR-RH),
B102(RR-LH) and ABS actuator and electric unit (control unit)
connector E30.
2. Check continuity between terminals. (Also check continuity
when steering wheel is turned right and left and when sensor
harness inside the wheel house is moved.)
OK or NG
OK >> GO TO 6.
NG >>
Repair or replace malfunctioning components.
Perform the self-diagnosis, and make sure that the result shows “NO DTC IS DETECTED”.
6. CHECK WHEEL SENSOR
1. Replace wheel sensor that resulted in malfunction by self-diagnosis.
2. Reconnect connectors, drive vehicle at 30 km/h (19 MPH) or more for approximately 1 minute, and then
perform self-diagnosis.
Is above displayed on the self-diagnosis display?
OK >> INSPECTION END
NG >>
Replace ABS actuator and electric unit (control unit).
Perform the self-diagnosis, and make sure that the result shows “NO DTC IS DETECTED”.
SFIA3030E
Power supply circuit Signal circuit Ground circuit
WheelABS actuator
and electric
unit (control
unit)Wheel sensorABS actua-
tor and elec-
tric unit
(control unit)Wheel sensorABS actua-
tor and elec-
tric unit
(control
unit)
(signal)Ground
Front RH 9 1 10 2 9, 10
— Front LH 26 1 5 2 26, 5
Rear RH 7 1 29 2 7, 29
Rear LH 6 1 27 2 6, 27
Power supply circuit : Yes
Signal circuit : Yes
Ground circuit : No

ENGINE CONTROL SYSTEM
EC-31
[VQ35DE]
C
D
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F
G
H
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MA
EC
Revision: 2006 January2006 M35/M45
Multiport Fuel Injection (MFI) SystemNBS004S3
INPUT/OUTPUT SIGNAL CHART
*1: This sensor is not used to control the engine system under normal conditions.
*2: This signal is sent to the ECM through CAN communication line.
*3: ECM determines the start signal status by the signals of engine speed and battery voltage.
SYSTEM DESCRIPTION
The amount of fuel injected from the fuel injector is determined by the ECM. The ECM controls the length of
time the valve remains open (injection pulse duration). The amount of fuel injected is a program value in the
ECM memory. The program value is preset by engine operating conditions. These conditions are determined
by input signals (for engine speed and intake air) from the crankshaft position sensor (POS), camshaft position
sensor (PHASE) and the mass air flow sensor.
VARIOUS FUEL INJECTION INCREASE/DECREASE COMPENSATION
In addition, the amount of fuel injected is compensated to improve engine performance under various operat-
ing conditions as listed below.

During warm-up
When starting the engine
During acceleration
Hot-engine operation
When selector lever is changed from N to D
High-load, high-speed operation

During deceleration
During high engine speed operation
Sensor Input Signal to ECM ECM function Actuator
Crankshaft position sensor (POS)
Engine speed*
3
Piston position
Fuel injection
& mixture ratio
controlFuel injector Camshaft position sensor (PHASE)
Mass air flow sensor Amount of intake air
Engine coolant temperature sensor Engine coolant temperature
Air fuel ratio (A/F) sensor 1 Density of oxygen in exhaust gas
Throttle position sensor Throttle position
Accelerator pedal position sensor Accelerator pedal position
Park/neutral position (PNP) switch Gear position
Battery
Battery voltage*
3
Knock sensor Engine knocking condition
Power steering pressure sensor Power steering operation
Heated oxygen sensor 2*
1Density of oxygen in exhaust gas
ABS actuator and electric unit (control unit)*
2VDC/TCS operation command
Air conditioner switch*
2Air conditioner operation
Wheel sensor*
2Vehicle speed

AIR CONDITIONING CUT CONTROL
EC-35
[VQ35DE]
C
D
E
F
G
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MA
EC
Revision: 2006 January2006 M35/M45
AIR CONDITIONING CUT CONTROLPFP:23710
Input/Output Signal ChartNBS004S6
*1: This signal is sent to the ECM through CAN communication line.
*2: ECM determines the start signal status by the signals of engine speed and battery voltage.
System DescriptionNBS004S7
This system improves engine operation when the air conditioner is used.
Under the following conditions, the air conditioner is turned off.
When the accelerator pedal is fully depressed.
When cranking the engine.
At high engine speeds.
When the engine coolant temperature becomes excessively high.
When operating power steering during low engine speed or low vehicle speed.
When engine speed is excessively low.
When refrigerant pressure is excessively low or high.
Sensor Input Signal to ECM ECM function Actuator
Air conditioner switch*
1Air conditioner ON signal
Air conditioner
cut controlAir conditioner relay Accelerator pedal position sensor Accelerator pedal position
Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)Engine speed*
2
Engine coolant temperature sensor Engine coolant temperature
Battery
Battery voltage*
2
Refrigerant pressure sensor Refrigerant pressure
Power steering pressure sensor Power steering operation
Wheel sensor*
1Vehicle speed

EC-36
[VQ35DE]
AUTOMATIC SPEED CONTROL DEVICE (ASCD)
Revision: 2006 January2006 M35/M45
AUTOMATIC SPEED CONTROL DEVICE (ASCD)PFP:18930
System DescriptionNBS004S8
INPUT/OUTPUT SIGNAL CHART
*: This signal is sent to the ECM through CAN communication line
BASIC ASCD SYSTEM
Refer to Owner's Manual for ASCD operating instructions.
Automatic Speed Control Device (ASCD) allows a driver to keep vehicle at predetermined constant speed
without depressing accelerator pedal. Driver can set vehicle speed in advance between approximately 40 km/
h (25 MPH) and 144 km/h (89 MPH).
ECM controls throttle angle of electric throttle control actuator to regulate engine speed.
Operation status of ASCD is indicated by CRUISE lamp and SET lamp in combination meter. If any malfunc-
tion occurs in ASCD system, it automatically deactivates control.
NOTE:
Always drive vehicle in safe manner according to traffic conditions and obey all traffic laws.
SET OPERATION
Press MAIN switch. (The CRUISE lamp in combination meter illuminates.)
When vehicle speed reaches a desired speed between approximately 40 km/h (25 MPH) and 144 km/h (89
MPH), press SET/COAST switch. (Then SET lamp in combination meter illuminates.)
ACCEL OPERATION
If the RESUME/ACCELERATE switch is pressed during cruise control driving, increase the vehicle speed until
the switch is released or vehicle speed reaches maximum speed controlled by the system.
And then ASCD will keep the new set speed.
CANCEL OPERATION
When any of following conditions exist, cruise operation will be canceled.
CANCEL switch is pressed
More than 2 switches at ASCD steering switch are pressed at the same time (Set speed will be cleared)
Brake pedal is depressed
Selector lever is changed to N, P, R position
Vehicle speed decreased to 13 km/h (8 MPH) lower than the set speed
TCS system is operated
When the ECM detects any of the following conditions, the ECM will cancel the cruise operation and inform
the driver by blinking indicator lamp.
Engine coolant temperature is slightly higher than the normal operating temperature, CRUISE lamp may
blink slowly.
When the engine coolant temperature decreases to the normal operating temperature, CRUISE lamp will
stop blinking and the cruise operation will be able to work by pressing SET/COAST switch or RESUME/
ACCELERATE switch.
Malfunction for some self-diagnoses regarding ASCD control: SET lamp will blink quickly.
If MAIN switch is turned to OFF during ASCD is activated, all of ASCD operations will be canceled and vehicle
speed memory will be erased.
Sensor Input signal to ECM ECM function Actuator
ASCD brake switch Brake pedal operation
ASCD vehicle speed controlElectric throttle control
actuator Stop lamp switch Brake pedal operation
ASCD steering switch ASCD steering switch operation
Park/Neutral position (PNP)
switchGear position
Wheel sensor* Vehicle speed
TCM* Powertrain revolution