Brake System INFINITI FX35 2008 Service Manual

BRC-50
< SERVICE INFORMATION >[VDC/TCS/ABS]
TROUBLE DIAGNOSIS FOR SYMPTOMS
The ABS Function Does Not Operate
INFOID:0000000001327695
CAUTION:
The ABS does not operate when the sp eed is 10 km/h (6 MPH) or less.
1.CHECK ABS WARNING LAMP DISPLAY
Make sure warning lamp turns off approximately 2 seconds after the ignition switch is turned ON or when driv-
ing.
OK or NG
OK >> CHECK WHEEL SENSOR. Refer to BRC-49, "Excessive ABS Function Operation Frequency".
NG >> Perform self-diagnosis. Refer to BRC-26, "
Self-Diagnosis".
Pedal Vibration or ABS Operation Sound OccursINFOID:0000000001327696
CAUTION:
Under the following conditions, when brake pedal is lightly depressed (just place a foot on it), ABS is
activated and vibration is felt. However, this is normal.
 When shifting gears
 When driving on slippery road
 During cornering at high speed
 When passing over bumps or grooves
 When pulling away just after st arting engine [at approximately 10 km/h (6 MPH) or higher]
1.SYMPTOM CHECK 1
Check if pedal vibration or operati on sound occurs when engine is started.
OK or NG
OK >> Perform self-diagnosis. Refer to BRC-26, "Self-Diagnosis".
NG >> GO TO 2.
2.SYMPTOM CHECK 2
Check symptom when electrical component (headlamps, etc.) switches are operated.
Does the symptom occur when the electrical component (head lamp, etc.) switches are operated?
YES >> Check if there is a radio, antenna, antenna lead wi re, or wiring close to ABS actuator and electric
unit (control unit) (or its wiring), and if there is, move it farther away.
NO >> CHECK WHEEL SENSOR. Refer to BRC-49, "
Excessive ABS Function Operation Frequency".
Vehicle Jerks During VDC/TCS/ABS ControlINFOID:0000000001327697
1.CHECK ENGINE SPEED SIGNAL
Perform CONSULT-III “DATA MONITOR” to check engine speed.
Is engine speed at idle 400 rpm or higher?
YES >> GO TO 3.
NO >> GO TO 2.
2.CHECK ABS WARNING LAMP DISPLAY
Make sure warning lamp turns off approximately 2 seconds after the ignition switch is turned ON or when driv-
ing.
OK or NG
OK >> System is normal.
NG >> GO TO 3.
3.CHECK ECM SELF-DIAGNOSTIC RESULTS
Perform ECM self-diagnosis.
Are self-diagnosis items displayed?
YES >> Check the corresponding items. Refer to EC-89(VQ35DE), EC-666(VK45DE) in “Engine Control
(EC section)”.
NO >> GO TO 4.
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BRC-54
< SERVICE INFORMATION >[VDC/TCS/ABS]
ACTUATOR AND ELECTRIC UNIT (ASSEMBLY)
ACTUATOR AND ELECTRIC UNIT (ASSEMBLY)
Removal and InstallationINFOID:0000000001327700
REMOVAL
1. Disconnect ABS actuator and electric unit (control unit) connector.
2. Loosen brake tube flare nuts, then remove brake tubes
from ABS actuator and electric unit (control unit).
3. Remove LH side fender protector. Refer to EI-24
.
4. Remove ABS actuator and electric unit (control unit) mounting nuts.
5. Remove ABS actuator and electric unit (control unit) from vehicle.
CAUTION:
Be careful of the following wh en removing ABS actuator and electric unit (control unit).
 If the part number on the part number label (p asted on actuator upper surface) is the same, ABS
actuator and electric unit (c ontrol unit) can not be used on another vehicle.
If it is used on another vehicle, ABS warning lamp, SLIP indicator lamp and VDC OFF indicator lamp
may turn ON or VDC/TCS/ABS may not operate normally.
When replacing ABS actuator an d electric unit (control unit), must use new service parts.
 Before servicing, disconnect battery cables.
 To remove brake tube, use a flare nut torque wrench to prevent flare nuts and brake tube from being
damaged. To install, use a flare nut torque wren ch (commercial service tool) and tighten to the spec-
ified torque.
 Do not apply excessive impact to actuator, such as dropping it.
 Do not remove and install ABS actuator and el ectric unit (control unit) by holding harness.
INSTALLATION
Note the following, and install in the reverse order of removal.
CAUTION:
Be careful of the following wh en installing ABS actuator and electric unit (control unit).
 Tighten the mounting bolts and nuts to the specified torque.
 After the work, bleed air from brake piping. Refer to BR-8, "
Bleeding Brake System".
 After installing vehicle harness connector in th e actuator, make sure connector is securely locked.
 When replacing ABS actuator and el ectric unit (control unit), calibrate steering angle sensor neutral
position and decel G sensor. Refer to BRC-8
.
PFIA0601E
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CO-8
< SERVICE INFORMATION >[VQ35DE]
OVERHEATING CAUSE ANALYSIS
Except cool-
ing system
parts mal-
function— Overload on engine
Abusive driving
High engine rpm under no
load
Driving in low gear for ex-
tended time
Driving at extremely high
speed
Powertrain sy stem malfunc-
tion
—
Installed improper size
wheels and tires
Dragging brakes
Improper ignition timing
Blocked or restricted air
flow Blocked bumper —
—
Blocked radiator grille
Installed car brassiere
Mud contamination or paper
clogging
Blocked radiator —
Blocked condenser Blocked air flow
Installed large fog lamp
Symptom Check items
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OVERHEATING CAUSE ANALYSISCO-35
< SERVICE INFORMATION > [VK45DE]
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Except cool-
ing system
parts mal-
function — Overload on engine
Abusive driving
High engine rpm under no
load
Driving in low gear for ex-
tended time
Driving at extremely high
speed
Powertrain system malfunc-
tion
—
Installed improper size
wheels and tires
Dragging brakes
Improper ignition timing
Blocked or restricted air
flow Blocked bumper —
—
Blocked radiator grille
Installed car brassiere
Mud contamination or paper
clogging
Blocked radiator —
Blocked condenser Blocked air flow
Installed large fog lamp
Symptom Check items
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DI-26
< SERVICE INFORMATION >
UNIFIED METER AND A/C AMP
UNIFIED METER AND A/C AMP
System DescriptionINFOID:0000000001328456
 For the unified meter and A/C amp., the signal required for controlling the combination meter are integrated
in the A/C auto amp.
 The unified meter and A/C amp. corresponds to a CONS ULT-III function (self-diagnosis results, CAN diag-
nosis support monitor, data monitor).
COMBINATION METER CONTROL FUNCTION
 Unified meter and A/C amp. receives necessary information for combination meter from each unit by CAN communication.
 Unified meter and A/C amp. transmits a signals with communication line (TX, RX) between unified meter and A/C amp. and combination meter.
Input/output signals between unified meter and A/C amp. and combination meter.
NOTE:
Combination meter performs fail-safe operation when unified meter and A/C amp. communication is malfunctioning. Refer to DI-5, "
Sys-
tem Description".
A/C AUTO AMP. FUNCTION
Unified meter and A/C amp. controls each operation for A/C auto amp. Regarding A/C control, refer to AT C -
24, "Description of Air Conditioner LAN Control System" in ATC section.
OTHER FUNCTIONS
Drive Computer Function
The signals required for the distance to empty (DTE) display are centralized in the unified meter and A/C
amp., converted into data, and transmitted to the disp lay unit (without NAVI) and display control unit (with
NAVI) using CAN communication.
Signal Buffer Function
Unified meter and A/C amp. transmits each signal to other units with CAN communication.
Unit Input Output
Unified meter and A/C amp.  Seat belt buckle switch signal (Driver's side)
 Parking brake signal
 Illumination control nighttime required signal
 Refuel status signal
 Low-fuel warning lamp condition signal
 Combination meter receive error signal
 Delivery destination data signal
 Combination meter specifications signal  Vehicle speed signal (8-pulse)
 Engine speed signal
 Engine coolant temperature signal
 Fuel level sensor signal (resistance value)
 Malfunction indicator lamp signal
 ABS warning lamp signal
 Low tire pressure warning lamp signal
 Run-flat tire wa
rning lamp signal
 Brake warning lamp signal
 A/T CHECK warning lamp signal
 ICC warning lamp signal
 Oil pressure switch signal
 Door switch signal
 AWD warning lamp signal
 Key warning lamp signal
 VDC OFF indicator lamp signal
 SLIP indicator lamp signal
 CRUISE indicator lamp signal
 SET indicator lamp signal
 High beam request signal
 Turn indicator signal
 Snow mode switch signal
 ICC system display signal
 Shift position indicator signal
 Manual mode indicator signal
 Manual mode gear position signal
 CAN communication condition signal of A/T
 Position lights request signal
 Buzzer output signal
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LANE DEPARTURE WARNING SYSTEMDI-71
< SERVICE INFORMATION >
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NOTE:
*: This indicates in a few seconds for the system check during ignition switch ON.
POWER SUPPLY AND GROUND CIRCUIT
With the ignition switch in the ON or START position, power is supplied
 through 10A fuse [No. 12, located in the fuse block (J/B)]
 to LDW camera unit terminal 1.
Ground is supplied
 to LDW camera unit terminals 6 and 12
 through grounds M45, M85 and M35.
Action TestINFOID:0000000001328494
LDW SYSTEM RUNNING TEST
WARNING:
 Be careful when performing road test.
 Understand “Precautions” and “System Description” well before the road test. Refer to DI-69, "
Pre-
caution for Lane Departure Warning (LDW) system" and DI-69, "System Description".
Function Check
Check the LDW system operation according to the c ondition that the warning function works. Refer to DI-69,
"System Description".
Camera Aiming AdjustmentINFOID:0000000001328495
OUTLINE
Adjust the camera aiming every time the LDW camera unit is removed or installed.
CAUTION:
 Place the vehicle on the level ground when the camera aiming adjustment is operated.
 Follow the CONSULT-III when ad justing the camera aiming. (Camera aiming adjustment cannot be
operated without CONSULT-III.)
PREPARATION
 Keep all tires inflated to correct pressures. Adjust the tire pressure to the specified pressure value.
 There is no-load in vehicle. Check if coolant, engine oil are filled up to correct level and fuel tank is full.
 Shift the gear into “P” position and release the parking brake.
 Clean the windshield.
NOTE:
Do not place anything reflective on t he upper surface of instrument panel.
TARGET SETTING
Preparation Aiming Adjustment Jig
Component Description
LDW camera unit Detects the lane marker by the built-in camera, gives judgement for the warning according to the result
of detection and signals from each unit, and transmits the operation signal to LDW chime and LDW
indicator lamp.
LDW switch  Selects ON/OFF of the system.
 Indicates ON/OFF of the signal with LDW system ON indicator.
LDW chime Gives a warning chime according to the direction from LDW camera unit.
LDW indicator lamp Installed in combination meter, and indicates the system condition.
 Blinks when LDW system is functioning to alert the driver.
 Stays on when LDW system is malfunctioning.
*
BCM Transmits turn indicator signal to LDW camera unit with CAN communication signal.
ABS actuator and electric unit
(control unit)
Transmits vehicle speed signal to LDW camera unit with CAN communication signal.
TCM Transmits vehicle speed signal to LDW camera unit with CAN communication signal. (For detecting
incorrect speed.)
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EC-8
Component Inspection ...........................................545
ASCD INDICATOR ..........................................547
Component Description ....................................... ..547
CONSULT-III Reference Value in Data Monitor
Mode .................................................................... ..
547
Wiring Diagram ......................................................548
Diagnosis Procedure .............................................548
ELECTRICAL LOAD SIGNAL .........................550
Description ........................................................... ..550
CONSULT-III Reference Value in Data Monitor
Mode .................................................................... ..
550
Diagnosis Procedure .............................................550
FUEL INJECTOR .............................................552
Component Description ....................................... ..552
CONSULT-III Reference Value in Data Monitor
Mode .................................................................... ..
552
Wiring Diagram ......................................................553
Diagnosis Procedure .............................................554
Component Inspection ...........................................557
Removal and Installation .......................................557
FUEL PUMP .....................................................558
Description ........................................................... ..558
CONSULT-III Reference Value in Data Monitor
Mode .................................................................... ..
558
Wiring Diagram ......................................................559
Diagnosis Procedure .............................................560
Component Inspection ...........................................562
Removal and Installation .......................................562
ICC BRAKE SWITCH ......................................563
Component Description ....................................... ..563
CONSULT-III Reference Value in Data Monitor
Mode .................................................................... ..
563
Wiring Diagram ......................................................564
Diagnosis Procedure .............................................565
Component Inspection ...........................................567
IGNITION SIGNAL ...........................................569
Component Description ....................................... ..569
Wiring Diagram ......................................................570
Diagnosis Procedure .............................................575
Component Inspection ...........................................578
Removal and Installation .......................................580
REFRIGERANT PRESSURE SENSOR ..........581
Component Description ....................................... ..581
Wiring Diagram ......................................................582
Diagnosis Procedure .............................................583
Removal and Installation .......................................585
SNOW MODE SWITCH ...................................586
Description ........................................................... ..586
CONSULT-III Reference Value in Data Monitor
Mode .................................................................... ..
586
Wiring Diagram ......................................................587
Diagnosis Procedure .............................................587
Component Inspection ...........................................589
MIL AND DATA LINK CONNECTOR ...............591
Wiring Diagram .................................................... .591
SERVICE DATA AND SPECIFICATIONS
(SDS) ................................................................
593
Fuel Pressure ....................................................... .593
Idle Speed and Ignition Timing .............................593
Calculated Load Value ..........................................593
Mass Air Flow Sensor ...........................................593
Intake Air Temperature Sensor .............................593
Engine Coolant Temperature Sensor ...................593
Air Fuel Ratio (A/F) Sensor 1 Heater ....................593
Heated Oxygen sensor 2 Heater ..........................593
Crankshaft Position Sensor (POS) .......................594
Camshaft Position Sensor (PHASE) .....................594
Throttle Control Motor .......................................... .594
Fuel Injector ..........................................................594
Fuel Pump .............................................................594
VK45DE
SERVICE INFORMATION .. .......................
595
INDEX FOR DTC ............................................ ..595
DTC No. Index ..................................................... .595
Alphabetical Index .................................................598
PRECAUTIONS .............................................. ..603
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" .............................................................. .
603
Precaution for Procedure without Cowl Top Cover .603
On Board Diagnosis (OBD) System of Engine and
A/T ........................................................................
603
Precaution .............................................................604
PREPARATION ................................................607
Special Service Tool ............................................ .607
Commercial Service Tool ......................................608
ENGINE CONTROL SYSTEM ..........................609
Schematic ............................................................ .609
Multiport Fuel Injection (MFI) System ...................609
Electronic Ignition (EI) System ..............................612
Fuel Cut Control (at No Load and High Engine
Speed) ..................................................................
612
AIR CONDITIONING CUT CONTROL .............614
Input/Output Signal Chart .................................... .614
System Description ...............................................614
AUTOMATIC SPEED CONTROL DEVICE
(ASCD) ..............................................................
615
System Description .............................................. .615
Component Description ........................................616
CAN COMMUNICATION ..................................617
System Description .............................................. .617
EVAPORATIVE EMISSION SYSTEM ..............618
Description ........................................................... .618
Component Inspection ..........................................620
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INDEX FOR DTCEC-19
< SERVICE INFORMATION > [VQ35DE]
C
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K L
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EC
NP
OP0460 0460 FUEL LEV SEN SLOSH
EC-401
P0461 0461 FUEL LEVEL SENSOREC-403
P0462 0462 FUEL LEVL SEN/CIRCEC-405
P0463 0463 FUEL LEVL SEN/CIRCEC-405
P0500 0500
VEH SPEED SEN/CIRC*5EC-407
P0506 0506 ISC SYSTEM EC-409
P0507 0507 ISC SYSTEM EC-411
P0550 0550 PW ST P SEN/CIRCEC-413
P0603 0603 ECM BACK UP/CIRCUITEC-418
P0605 0605 ECMEC-422
P0643 0643 SENSOR POWER/CIRCEC-424
P0700 0700 TCM AT- 1 0 1
P0705 0705 PNP SW/CIRCAT- 1 0 2
P0710 0710 ATF TEMP SEN/CIRCAT- 1 3 2
P0717 0717 TURBINE SENSORAT- 1 0 6
P0720 0720
VEH SPD SEN/CIR AT*5AT- 1 0 8
P0731 0731 A/T 1ST GR FNCTN AT- 11 4
P0732 0732 A/T 2ND GR FNCTNAT- 11 6
P0733 0733 A/T 3RD GR FNCTNAT- 11 8
P0734 0734 A/T 4TH GR FNCTNAT- 1 2 0
P0735 0735 A/T 5TH GR FNCTNAT- 1 2 2
P0740 0740 TCC SOLENOID/CIRCAT- 1 2 4
P0744 0744 A/T TCC S/V FNCTNAT- 1 2 6
P0745 0745 L/PRESS SOL/CIRCAT- 1 2 8
P0850 0850 P-N POS SW/CIRCUITEC-429
P1148 1148 CLOSED LOOP-B1EC-434
P1168 1168 CLOSED LOOP-B2EC-434
P1211 1211 TCS C/U FUNCTNEC-435
P1212 1212 TCS/CIRC EC-436
P1217 1217 ENG OVER TEMPEC-437
P1225 1225 CTP LEARNING-B1EC-447
P1226 1226 CTP LEARNING-B1EC-449
P1421 1421 COLD START CONTROLEC-451
P1564 1564 ASCD SWEC-453 (Models with ICC),
EC-459
(Models with ASCD)
P1568 1568 ICC COMMAND VALUE*
6EC-464
P1572 1572 ASCD BRAKE SW EC-465 (Models with ICC),
EC-474
(Models with ASCD)
P1574 1574 ASCD VHL SPD SEN EC-481
(Models with ICC),
EC-483
(Models with ASCD)
P1610 1610 LOCK MODE BL-4
P1611 1611 ID DISCARD IMM-ECMBL-4
P1612 1612 CHAIN OF ECM-IMMU BL-4
DTC*1
Items
(CONSULT-III screen terms) Reference page
CONSULT-III
GST*
2ECM*3
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EC-20
< SERVICE INFORMATION >[VQ35DE]
INDEX FOR DTC
*1: 1st trip DTC No. is
the same as DTC No.
*2: This number is prescribed by SAE J2012.
*3: In Diagnostic Test Mode II (Self-diagnostic results), this number is controlled by NISSAN.
*4: The troubleshooting for this DTC needs CONSULT-III.
*5: When the fail-safe operations for both self-diagnoses occur, the MIL illuminates.
*6: For models with ICC system.
Alphabetical IndexINFOID:0000000001325888
P1614 1614 CHAIN OF IMMU-KEY BL-4
P1615 1615 DIFFERENCE OF KEYBL-4
P1715 1715 IN PULY SPEEDEC-485
P1730 1730 A/T INTERLOCK AT- 1 3 9
P1752 1752 I/C SOLENOID/CIRCAT- 1 4 3
P1757 1757 FR/B SOLENOID/CIRCAT- 1 4 5
P1762 1762 D/C SOLENOID/CIRCAT- 1 4 7
P1767 1767 HLR/C SOL/CIRCAT- 1 4 9
P1772 1772 LC/B SOLENOID/CIRCAT- 1 5 1
P1774 1774 LC/B SOLENOID FNCTAT- 1 5 3
P1805 1805 BRAKE SW/CIRCUITEC-486
P2100 2100 ETC MOT PWR-B1EC-490
P2101 2101 ETC FNCTN/CIRC-B1EC-494
P2103 2103 ETC MOT PWREC-490
P 2 11 8 2 11 8 E T C M O T- B 1EC-500
P 2 11 9 2 11 9 E T C A C T R - B 1EC-504
P2122 2122 APP SEN 1/CIRC EC-506
P2123 2123 APP SEN 1/CIRCEC-506
P2127 2127 APP SEN 2/CIRCEC-512
P2128 2128 APP SEN 2/CIRCEC-512
P2135 2135 TP SENSOR-B1EC-518
P2138 2138 APP SENSOREC-524
P2A00 2A00 A/F SENSOR1 (B1) EC-532
P2A03 2A03 A/F SENSOR1 (B2)EC-532
DTC*1
Items
(CONSULT-III screen terms) Reference page
CONSULT-III
GST*
2ECM*3
Items
(CONSULT-III screen terms) DTC*
1
Reference page
CONSULT-III
GST*
2ECM*3
A/F SEN1 HTR (B1) P0031 0031 EC-153
A/F SEN1 HTR (B1) P0032 0032EC-153
A/F SEN1 HTR (B2) P0051 0051EC-153
A/F SEN1 HTR (B2) P0052 0052EC-153
A/F SENSOR1 (B1) P0130 0130EC-212
A/F SENSOR1 (B1) P0131 0131EC-220
A/F SENSOR1 (B1) P0132 0132EC-228
A/F SENSOR1 (B1) P0133 0133EC-236
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AUTOMATIC SPEED CONTROL DEVICE (ASCD)EC-37
< SERVICE INFORMATION > [VQ35DE]
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AUTOMATIC SPEED CONTROL DEVICE (ASCD)
System DescriptionINFOID:0000000001325901
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 dr
iver 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 thro ttle control actuator to regulate engine speed.
Operation status of ASCD is indicated by CRUISE i ndicator and SET indicator in combination meter. If any
malfunction 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 indicator 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 indi cator in combination meter illuminates.)
ACCELERATOR OPERATION
If the RESUME/ACCELERATE switch is pressed during cruise control driving, increase the vehicle speed until
the switch is released or vehicle speed reac hes 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
 VDC/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 t he normal operating temperature, CRUISE lamp will
stop blinking and the cruise operation will be able to work by depressing 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.
COAST OPERATION
When the SET/COAST switch is pressed during cruise control driving, decrease vehicle set speed until the
switch is released. And then ASCD will keep the new set speed.
RESUME OPERATION
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) switch Gear position
Wheel sensor. Vehicle speed*
TCM Powertrain revolution*
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