2004 INFINITI FX35 brake

TROUBLE DIAGNOSIS
BRC-55
[VDC/TCS/ABS]
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Revision: 2004 November 2004 FX35/FX45
Symptom 5: Pedal Vibration or ABS Operation Sound OccursAFS001TB
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 starting engine [at approximately 10 km/h (6MPH) or higher]
1. SYMPTOM CHECK 1
Check if pedal vibration or operation sound occurs when engine is started.
OK or NG
OK >> Perform self-diagnosis. Refer to BRC-27, "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 wire, or wiring close to ABS actuator and electric
unit (control unit) (or its wiring), and if there is, move it farther away.
NO >> GO TO symptom 1 “Step 2”. Refer to BRC-53, "
Symptom 1: Excessive ABS Function Operation
Frequency" .
Symptom 6: Vehicle Jerks During VDC/TCS/ABS ControlAFS001TC
1. CHECK ENGINE SPEED SIGNAL
Perform CONSULT-II “DATA MONITOR” to check engine speed.
Is engine speed at idle 400 rpm or higher?
YES >> GO TO 3.
NO >> GO TO 2.
2. ABS WARNING LAMP DISPLAY CHECK
Make sure warning lamp turns off approximately 2 sec. After turn ignition switch ON or when driving.
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-77, "TROUBLE DIAGNOSIS" (VQ35DE), EC-726,
"TROUBLE DIAGNOSIS" (VK45DE) in “Engine Control (EC section)”.
NO >> GO TO 4.
4. CHECK A/T SELF-DIAGNOSTIC RESULTS
Perform A/T self-diagnosis.
OK or NG
OK >> GO TO 5.
NG >> Check the corresponding items. Refer toAT- 4 2 , "
TROUBLE DIAGNOSIS" in “A/T”.

BRC-60
[VDC/TCS/ABS]
ACTUATOR AND ELECTRIC UNIT (ASSEMBLY)
Revision: 2004 November 2004 FX35/FX45
ACTUATOR AND ELECTRIC UNIT (ASSEMBLY)PFP:47660
Removal and InstallationAFS001Z5
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-25, "
FENDER PROTECTOR" .
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 when removing ABS actuator and electric unit (control unit).

If the part number on the part number label (pasted on actuator upper surface) is the same, ABS
actuator and electric unit (control unit) cannot 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 and electric unit (control unit), must use new service parts.

Before servicing, disconnect battery cables.

To remove brake tube, use a flare nut wrench to prevent flare nuts and brake tube from being dam-
aged. To install, use a flare nut torque wrench (commercial service tool) and tighten to the speci-
fied torque.

Do not apply excessive impact to actuator, such as dropping it.

Do not remove and install ABS actuator and electric unit (control unit) by holding harness.
INSTALLATION
To install, follow procedure for removal in reverse order.
CAUTION:
Be careful of the following when 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-10, "Bleeding Brake System" .
PFIA0601E

CO-8
[VQ35DE]
OVERHEATING CAUSE ANALYSIS
Revision: 2004 November 2004 FX35/FX45
Except cool-
ing system
parts mal-
function— Overload on engineAbusive drivingHigh engine rpm under no
load
Driving in low gear for
extended time
Driving at extremely high
speed
Powertrain system mal-
function
— Installed improper size
wheels and tires
Dragging brakes
Improper ignition timing
Blocked or restricted air
flowBlocked bumper —
— Blocked radiator grilleInstalled car brassiere
Mud contamination or
paper clogging
Blocked radiator —
Blocked condenser
Blocked air flow
Installed large fog lamp Symptom Check items

OVERHEATING CAUSE ANALYSIS
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[VK45DE]
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Revision: 2004 November 2004 FX35/FX45
Except cool-
ing system
parts mal-
function— Overload on engineAbusive drivingHigh engine rpm under no
load
Driving in low gear for
extended time
Driving at extremely high
speed
Powertrain system mal-
function
— Installed improper size
wheels and tires
Dragging brakes
Improper ignition timing
Blocked or restricted air
flowBlocked bumper —
— Blocked radiator grilleInstalled car brassiere
Mud contamination or
paper clogging
Blocked radiator —
Blocked condenser
Blocked air flow
Installed large fog lamp Symptom Check items

DI-28
UNIFIED METER AND A/C AMP
Revision: 2004 November 2004 FX35/FX45
UNIFIED METER AND A/C AMPPFP:27760
System DescriptionAKS005N8

For the unified meter and A/C amp., the signal required for controlling the combination meter are inte-
grated in the A/C auto amp.

Unified meter and A/C amp. controls each operation for A/C auto amp. For information regarding A/C con-
trol, refer to AT C - 3 0 , "
AIR CONDITIONER CONTROL" in ATC section.

Unified meter and A/C amp. inputs necessary information for combination meter from each unit by CAN
communication and so on.

And unified meter and A/C amp. outputs these signals using communication line (TX, RX) between unified
meter and A/C amp. and combination meter.

The signals required for the distance to empty (DTE) display are centralized in the unified meter and A/C
amp., converted into data, and sent to the display unit (without NAVI) display control unit (with NAVI) using
CAN communication.

Other input signals are also sent to the ECM, TCM, AWD control unit, BCM, display unit (without NAVI)
and display control unit (with NAVI) using CAN communication.

The unified meter and A/C amp. have a CONSULT-II function (self-diagnostic results, CAN diagnostic
support monitor, data monitor).
INPUT/OUTPUT SIGNALS
Between Unified Meter & A/C amp. and Combination Meter
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

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

VDC OFF indicator lamp signal

SLIP indicator lamp signal

ASCD CRUISE indicator lamp signal

ASCD SET indicator lamp signal

High beam request signal

Turn indicator signal

Snow mode switch signal

ICC system display signal

A/T 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

UNIFIED METER AND A/C AMP
DI-29
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Revision: 2004 November 2004 FX35/FX45
FA I L - S A F E
Solution When Communication Error Between the Unified Meter & A/C Amp. and the Combi-
nation Meter
CAN Communication System DescriptionAKS007Z1
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.
CAN Communication UnitAKS007YX
Refer to LAN-6, "CAN Communication Unit" in “LAN SYSTEM”.
Function Specifications
Speedometer
Reset to zero by suspending communication. Tachometer
Fuel gauge
Water temperature gauge
Illumination control Combination meter illumination When suspending communication, change to nighttime mode.
Odo/trip meter Integrate in response to 8-pulse input.
A/T position indicator The display turns off by suspending communication.
Warning buzzer The warning buzzer turns off by suspending communication.
Warning lamp/indicator lampABS warning lamp
The lamp turns on by suspending communication. VDC OFF indicator
SLIP indicator
Brake warning lamp
Door warning lamp
The lamp turns off by suspending communication. Low tire pressure warning lamp
ASCD SET indicator lamp
ASCD CRUISE indicator lamp
AWD warning lamp
ICC warning lamp
A/T CHECK warning lamp
Oil pressure warning lamp
Snow mode indicator lamp
Turn signal indicator
Malfunction indicator lamp
High beam indicator

UNIFIED METER AND A/C AMP
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Revision: 2004 November 2004 FX35/FX45
4. Touch “START”.
5. Touch “RECORD” while monitoring, then the status of the moni-
tored item can be recorded. To stop recording, touch “STOP”.
Display Item List
SKIA4957E
Display item [Unit] MAIN SIGNALSSELECTION
FROM MENUContents
SPEED METER [km/h] or [mph] X XThis is the angle correction value after the speed signal
from the ABS actuator and electric unit (control unit) is
converted into the vehicle speed.
SPEED OUTPUT [km/h] or [mph] X XThis is the angle correction value before the speed signal
from the ABS actuator and electric unit (control unit) is
converted into the vehicle speed.
TACHO METER [rpm] X XThis is the converted value for the engine speed signal
from the ECM.
W TEMP METER [°C] or [°F] X XThis is the converted value for the engine coolant temper-
ature signal from the ECM.
FUEL METER [lit.] X XThis is the processed value for the signal (resistance
value) from the fuel gauge.
DISTANCE [km] or [mile] X XThis is the calculated value for the speed signal from the
ABS actuator and electric unit (control unit), the signal
(resistance signal) from the fuel gauge and fuel consump-
tion signal from ECM.
FUEL W/L [ON/OFF] X X Indicates [ON/OFF] condition of low-fuel warning lamp.
MIL [ON/OFF] XIndicates [ON/OFF] condition of malfunction indicator
lamp.
AIR PRES W/L [ON/OFF] XIndicates [ON/OFF] condition of low tire pressure warning
lamp.
SEAT BELT W/L [ON/OFF] X Indicates [ON/OFF] condition of seat belt warning lamp.
BUZZER [ON/OFF] X X Indicates [ON/OFF] condition of buzzer.
DOOR W/L [ON/OFF] X Indicates [ON/OFF] condition of door warning lamp.
HI-BEAM IND [ON/OFF] X Indicates [ON/OFF] condition of high beam indicator.
TURN IND [ON/OFF] X Indicates [ON/OFF] condition of turn indicator.
OIL W/L [ON/OFF] X Indicates [ON/OFF] condition of oil pressure warning lamp.
VDC/TCS IND [ON/OFF] X Indicates [ON/OFF] condition of VDC OFF indicator lamp.
ABS W/L [ON/OFF] X Indicates [ON/OFF] condition of ABS warning lamp.
SLIP IND [ON/OFF] X Indicates [ON/OFF] condition of SLIP indicator lamp.
BRAKE W/L [ON/OFF] X Indicates [ON/OFF] condition of brake warning lamp.*
KEY G W/L [ON/OFF] X Indicates [ON/OFF] condition of key warning lamp (green).
KEY R W/L [ON/OFF] X Indicates [ON/OFF] condition of key warning lamp (red).
KEY KNOB W/L [ON/OFF] X Indicates [ON/OFF] condition of key knob warning lamp.
M RANGE SW [ON/OFF] X XIndicates [ON/OFF] condition of manual mode range
switch.
NM RANGE SW [ON/OFF] X XIndicates [ON/OFF] condition of except for manual mode
range switch.

DI-34
UNIFIED METER AND A/C AMP
Revision: 2004 November 2004 FX35/FX45
NOTE:
Any monitored item that does not match the vehicle being diagnosed is deleted from the display automatically.
*: Monitor keeps indicating “OFF” when brake warning lamp is on by the parking brake operation or low brake
fluid level.
Removal and Installation of Unified Meter and A/C Amp. AKS005NC
REMOVAL
1. Remove the audio unit. Refer to AV- 4 4 , "Removal and Installa-
tion of Audio Unit" .
2. Remove the fixing screws, then remove the unified meter and A/
C amp.
INSTALLATION
Installation is basically in the reverse order of removal.
AT SFT UP SW [ON/OFF] X X Indicates [ON/OFF] condition of A/T shift- up switch.
AT SFT DWN SW [ON/OFF] X X Indicates [ON/OFF] condition of A/T shift- down switch.
AT S MODE SW [ON/OFF] X Indicates [ON/OFF] condition of snow mode switch.
BRAKE SW [ON/OFF] XIndicates [ON/OFF] condition of brake switch (stop lamp
switch).
AT-M IND [ON/OFF] X XIndicates [ON/OFF] condition of A/T manual mode indica-
tor.
AT-M GEAR [5-1] X XIndicates [5-1] condition of A/T manual mode gear posi-
tion.
P RANGE IND [ON/OFF] X XIndicates [ON/OFF] condition of A/T shift P range indica-
tor.
R RANGE IND [ON/OFF] X XIndicates [ON/OFF] condition of A/T shift R range indica-
tor.
N RANGE IND [ON/OFF] X XIndicates [ON/OFF] condition of A/T shift N range indica-
tor.
D RANGE IND [ON/OFF] X XIndicates [ON/OFF] condition of A/T shift D range indica-
tor.
AT CHECK W/L X Indicates [ON/OFF] condition of AT CHECK warning lamp.
CRUISE IND [ON/OFF] XIndicates [ON/OFF] condition of ASCD CRUISE indicator
lamp.
SET IND [ON/OFF] XIndicates [ON/OFF] condition of ASCD SET indicator
lamp.
CRUISE W/L [ON/OFF] X Indicates [ON/OFF] condition of ICC warning lamp.
4WD W/L [ON/OFF] X Indicates [ON/OFF] condition of AWD warning lamp.Display item [Unit] MAIN SIGNALSSELECTION
FROM MENUContents
SKIA6167E