TROUBLE DIAGNOSIS
BRC-55
[TCS/ABS]
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Revision: 2006 November2007 350Z
Data MonitorNFS000HH
DISPLAY ITEM LIST
×: Standard –: Not applicable : Option
Item (Unit)SELECT MONITOR ITEM
Remarks
ECU INPUT
SIGNALSMAIN
SIGNALSSELECTION
FROM MENU
FR LH SENSOR
[km/h (MPH)]××Wheel speed calculated by front LH wheel
sensor signal is displayed.
FR RH SENSOR
[(km/h (MPH)]××Wheel speed calculated by front RH wheel
sensor signal is displayed.
RR LH SENSOR
[km/h (MPH)]××Wheel speed calculated by Rear LH wheel
sensor signal is displayed.
RR RH SENSOR
[km/h (MPH)]××Wheel speed calculated by Rear RH wheel
sensor signal is displayed.
FR LH IN SOL
(ON/OFF)–×Front left inlet ABS solenoid valve (ON/OFF)
status is displayed.
FR LH OUT SOL
(ON/OFF)–×Front left outlet ABS solenoid valve (ON/
OFF) status is displayed.
RR RH IN SOL
(ON/OFF)–×Rear right inlet ABS solenoid valve (ON/OFF)
status is displayed.
RR RH OUT SOL
(ON/OFF)–×Rear right outlet ABS solenoid valve (ON/
OFF) status is displayed.
FR RH IN SOL
(ON/OFF)–×Front right inlet ABS solenoid valve (ON/
OFF) status is displayed.
FR RH OUT SOL
(ON/OFF)–×Front right outlet ABS solenoid valve (ON/
OFF) status is displayed.
RR LH IN SOL
(ON/OFF)–×Rear left rear wheel inside ABS solenoid
valve (ON/OFF) status is displayed.
RR LH OUT SOL
(ON/OFF)–×Rear left outlet ABS solenoid valve (ON/OFF)
status is displayed.
EBD WARN LAMP
(ON/OFF)–×Brake warning lamp (ON/OFF) status is dis-
played.
STOP LAMP SW
(ON/OFF)××Stop lamp switch (ON/OFF) status is dis-
played.
MOTOR RELAY
(ON/OFF)–×ABS motor relay (ON/OFF) condition is dis-
played.
ACTUATOR RLY
(ON/OFF)–×ABS actuator relay (ON/OFF) status is dis-
played.
ABS WARN LAMP
(ON/OFF)–×ABS warning lamp (ON/OFF) status is dis-
played.
OFF LAMP
(ON/OFF)–×TCS OFF indicator lamp (ON/OFF) status is
displayed.
OFF SW
(ON/OFF)××TCS OFF switch (ON/OFF) status is dis-
played.
SLIP LAMP
(ON/OFF)–×SLIP indicator lamp (ON/OFF) status is dis-
played.
BATTERY VOLT
(V )××The voltage supplied to the ABS actuator and
electric unit (control unit) is displayed.
GEAR
(A/T model)××The gear position determined from the A/T
PNP switch signal is displayed.
ENGINE SPEED
(rpm)××Engine speed status determined from the
CAN communication signal is displayed.
TROUBLE DIAGNOSIS
BRC-59
[TCS/ABS]
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BRC
Revision: 2006 November2007 350Z
ABS WARNING LAMP, TCS OFF INDICATOR LAMP AND SLIP INDICATOR LAMP ON/OFF TIM-
ING
×: ON −: OFF
Basic InspectionNFS00037
BRAKE FLUID AMOUNT, LEAKS, AND BRAKE PADS INSPECTION
1. Check fluid level in the brake reservoir tank. If fluid level is low, refill the brake fluid.
2. Check brake tubes or hoses and around ABS actuator and electric unit (control unit) for leaks. If there is
leaking or oozing fluid, check the following items.
If ABS actuator and electric unit (control unit) connection is loose, tighten the piping to the specified
torque and re-conduct the leak inspection to make sure there are no leaks.
If there is damage to the connection flare nut or ABS actuator and electric unit (control unit) screw,
replace the damaged part and re-conduct the leak inspection to make sure there are no leaks.
When there is fluid leaking or oozing from a part other than ABS actuator and electric unit (control unit)
connection, if the fluid is just oozing out, use a clean cloth to wipe off the oozing fluid and re-check for
leaks. If fluid is still oozing out, replace the damaged part.
When there is fluid leaking or oozing at ABS actuator and electric unit (control unit), if the fluid is just
oozing out, use a clean cloth to wipe off the oozing fluid and re-check for leaks. If fluid is still oozing out,
replace the ABS actuator and electric unit (control unit) body.
CAUTION:
ABS actuator and electric unit (control unit) cannot be disassembled.
3. Check brake pad degree of wear. Refer to BR-26, "
PAD WEAR INSPECTION" in “Front Disc Brake” and
BR-39, "
PAD WEAR INSPECTION" in “Rear Disc Brake”.
POWER SYSTEM TERMINAL LOOSENESS AND BATTERY INSPECTION
Make sure the battery positive cable, negative cable and ground connection are not loose. In addition, check
the battery voltage to make sure it has not dropped.
Condition ABS warning lampTCS OFF indicator
lampSLIP indicator
lampRemarks
Ignition switch OFF — — —
For approximately “1” second
after ignition switch ON×××—
After approximately “1” sec-
ond after ignition switch ON
(When system is normal)— — — Turns off 2 second after engine start
When the TCS OFF switch is
turned on (TCS function off)—×——
TCS/ABS error×××—
××—When there is an ABS actuator and
electric unit (control unit) error (power
or ground error)
TCS error —××—
BRC-64
[TCS/ABS]
TROUBLE DIAGNOSIS FOR SYSTEM
Revision: 2006 November2007 350Z
ABS Actuator and Electric Unit (Control Unit) Power and Ground SystemsNFS0003B
INSPECTION PROCEDURE
1. CHECK SELF-DIAGNOSIS RESULTS
Check self-diagnosis results.
Is the above displayed in the self-diagnosis display items?
YES >> GO TO 2.
NO >> INSPECTION END
2. CHECK CONNECTOR
1. Disconnect ABS actuator and electric unit (control unit) connector, check terminal to see if it is deformed,
disconnected, loose, etc., and if there is an error, repair or replace the terminal.
2. Securely reconnect the connector and then perform self-diagnosis.
Is the result of self-diagnosis normal?
YES >> The connector terminal contact is loose, damaged, open or shorted.
NO >> GO TO 3.
3. CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) POWER AND GROUND CIRCUIT
1. Disconnect ABS actuator and electric unit (control unit) connec-
tor E51.
2. Check continuity and voltage between ABS actuator and electric
unit (control unit) connector and ground.
OK or NG
OK >> Check battery (terminal looseness, power drop, etc.) Error. If there is an error, make repairs.
NG >> Corresponding harness circuit error. Repair the circuit.
Self-diagnosis results
BATTERY VOLTAGE [ABNORMAL]
SFIA1880E
Signal name ABS actuator and electric unit (control unit) Measurement condition Voltage
Power supply 29Ignition switch ON Battery voltage (Approx. 12 V)
Ignition switch OFF Approx. 0 V
SFIA1881E
Signal name ABS actuator and electric unit (control unit) Measurement condition Continuity
Ground 16, 30 Ignition switch OFF Yes
TROUBLE DIAGNOSIS FOR SYSTEM
BRC-65
[TCS/ABS]
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BRC
Revision: 2006 November2007 350Z
ABS Actuator Relay or ABS Motor Relay Power SystemNFS0003C
INSPECTION PROCEDURE
1. CHECK SELF-DIAGNOSIS RESULTS
Check self-diagnosis results.
Is the above displayed in the self-diagnosis display item?
YES >> GO TO 2.
NO >> INSPECTION END
2. CHECK CONNECTOR
1. Disconnect ABS actuator and electric unit (control unit) connector, check terminal to see if it is deformed,
disconnected, loose, etc., and if there is an error, repair or replace the terminal.
2. Securely reconnect the connector and then perform self-diagnosis.
Is the result of self-diagnosis normal?
YES >> The connector terminal contact is loose, damaged, open or shorted.
NO >> GO TO 3.
3. CHECK ABS ACTUATOR RELAY OR ABS MOTOR RELAY POWER CIRCUIT
1. Disconnect ABS actuator and electric unit (control unit) connector E51.
2. For ABS actuator relay, measure the voltage between the con-
nector terminal 1 and ground. For ABS motor relay, measure the
voltage between connector terminal 15 and ground.
OK or NG
OK >> GO TO 4
NG >> Error in the circuit between battery and ABS actuator
and electric unit (control unit). Repair the circuit.
4. CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) GROUND CIRCUIT
Check continuity between ABS actuator and electric unit (control
unit) connector and ground.
OK or NG
OK >> Replace ABS actuator and electric unit (control unit).
NG >> Open or short in harness. Repair or replace the harness.
Self-diagnosis results
IN ABS SOL
OUT ABS SOL
PUMP MOTOR
MAIN RELAY
ABS actuator and electric unit (control unit) Ground Voltage
1, 15 —Battery voltage
(Approx. 12 V)
SFIA1882E
ABS actuator and electric unit (control unit) Ground Continuity
16, 30 — Yes
SFIA1883E
TROUBLE DIAGNOSIS FOR SYSTEM
BRC-67
[TCS/ABS]
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BRC
Revision: 2006 November2007 350Z
4. CHECK STOP LAMP SWITCH CIRCUIT
1. Turn ignition switch OFF and disconnect ABS actuator and elec-
tric unit (control unit) connector E51.
2. Check voltage between ABS actuator and electric unit (control
unit) connector terminal and the ground.
OK or NG
OK >> INSPECTION END
NG >> Open or short in harness between ABS actuator and electric unit (control unit) and stop lamp
switch. Repair or replace the harness.
ABS Actuator and Electric Unit (Control Unit) 2NFS0003E
INSPECTION PROCEDURE
1. CHECK SELF-DIAGNOSIS RESULTS
Check self-diagnosis results.
When any item other than “EMERGENCY BRAKE” is indicated in self-diagnosis display, follow the instructions
below.
CAUTION:
“EMERGENCY BRAKE” is indicated when control unit itself is detected as an error. If this display item
is indicated, replace control unit.
Is the above displayed in the self-diagnosis display items?
YES >> Replace the ABS actuator and electric unit (control unit).
NO >> INSPECTION END
CAN Communication SystemNFS0003F
INSPECTION PROCEDURE
1. CHECK CONNECTOR
1. Turn ignition switch OFF, disconnect the ABS actuator and electric unit (control unit) connector, and check
terminal for deformation, disconnection, looseness, and so on. If there is a malfunction, repair or replace
the terminal.
2. Reconnect connector to perform self-diagnosis.
Is
“CAN COMM CIRCUIT” displayed in the self-diagnosis display items?
YES >> Print out the self-diagnostic results, and refer to LAN-48, "CAN System Specification Chart" .
NO >> Connector terminal connection is loose, damaged, open, or shorted.
SFIA1884E
ABS actuator and electric unit (control unit) Ground Measurement condition Voltage
17 —Brake pedal depressed. Battery voltage (Approx. 12 V)
Brake pedal not depressed. Approx. 0 V
Self-diagnosis results
EMERGENCY BRAKE
ABS ACTUATOR AND ELECTRIC UNIT (ASSEMBLY)
BRC-75
[TCS/ABS]
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Revision: 2006 November2007 350Z
ABS ACTUATOR AND ELECTRIC UNIT (ASSEMBLY)PFP:47660
Removal and InstallationNFS0003P
COMPONENTS
Pay attention to the following when removing actuator.
CAUTION:
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 flare nut wrench (commercial service tool).
Do not remove and install actuator by holding harness.
After work is completed, bleed air from brake piping. Refer toBR-11, "Bleeding Brake System" .
Be sure to securely connect the ground cable.
SFIA0631E
BRC-76
[VDC/TCS/ABS]
PRECAUTIONS
Revision: 2006 November2007 350Z
[VDC/TCS/ABS]PRECAUTIONSPFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
NFS000TP
The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SRS and SB section of this Service Man-
ual.
WARNING:
To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death
in the event of a collision which would result in air bag inflation, all maintenance must be per-
formed by an authorized NISSAN/INFINITI dealer.
Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air
Bag Module, see the SRS section.
Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or
harness connectors.
Precautions for Battery ServiceNFS0003R
Before disconnecting the battery, lower both the driver and passenger windows. This will prevent any interfer-
ence between the window edge and the vehicle when the door is opened/closed. During normal operation, the
window slightly raises and lowers automatically to prevent any window to vehicle interference. The automatic
window function will not work with the battery disconnected.
Precautions for Brake SystemNFS0003S
Recommended fluid is brake fluid “DOT 3”. Refer to MA-11, "RECOMMENDED FLUIDS AND LUBRI-
CANTS" .
Never reuse drained brake fluid.
Be careful not to splash brake fluid on painted areas such as body. If brake fluid is splashed, wipe it off
and flush area with water immediately.
Never use mineral oils such as gasoline or kerosene. They will ruin rubber parts of the hydraulic system.
Use a flare nut wrench when removing flare nuts, and use a flare
nut crowfoot and torque wrench when tighten brake tube flare
nuts.
When installing brake tubes, be sure to check torque.
Brake system is an important safety part. If a brake fluid leak is
detected, always disassemble the affected part. If a malfunction
is detected, replace part with a new one.
Before working, turn ignition switch OFF and disconnect electri-
cal connector of VDC/TCS/ABS control unit or the battery nega-
tive terminal.
WARNING:
Clean brake pads and shoes with a waste cloth, then wipe with a dust collector.
SBR686C
BRC-94
[VDC/TCS/ABS]
TROUBLE DIAGNOSIS
Revision: 2006 November2007 350Z
Control Unit Input/Output Signal StandardNFS00049
REFERENCE VALUE FROM CONSULT-III
CAUTION:
The display shows the control unit calculation data, so a normal value might be displayed even in the
event the output circuit (harness) is open or short - circuited.
Monitor item Display ContentData monitor
ConditionReference values for normal
operation
WHEEL SENSORVehicle speed calculated using
signals from all four wheel sen-
sorsVehicle stopped 0 km/h (0 MPH)
While driving (Note 1)Nearly matches the speed-
ometer display (±10% or
less)
IN ABS S/V
OUT ABS S/VOperation status of all solenoidsWhen the actuator solenoid operates or
during a fail-safeON
When the actuator relay operates and
the actuator solenoid does not operateOFF
STOP LAMP SW Brake pedal operationBrake pedal depressed ON
Brake pedal not depressed OFF
MOTOR RELAYMotor and motor relay operation
statusWhen the motor relay and motor are
operatingON
When the motor relay and motor are not
operatingOFF
ACTUATOR RLY Actuator relay operation statusWhen the actuator relay is operating OFF
When the actuator relay is not operat-
ingON
ABS WARN LAMPABS warning lamp on condition
(Note 2)ABS warning lamp ON ON
ABS warning lamp OFF OFF
OFF LAMPVDC OFF indicator lamp on con-
dition (Note 3)When the VDC OFF indicator lamp on ON
When the VDC OFF indicator lamp off OFF
OFF SWVDC OFF switch
ON-OFF statusVDC OFF switch ON
(When the VDC OFF indicator lamp on)ON
When VDC OFF switch OFF
(When the VDC OFF indicator lamp off)OFF
SLIP LAMPSLIP indicator lamp on condition
(Note 4)When SLIP indicator lamp is ON ON
When SLIP indicator lamp is OFF OFF
BATTERY VOLTBattery voltage supplied to VDC/
TCS/ABS control unitIgnition switch ON 10 - 16V
GEARDetermined gear shift position
from the A/T PNP switch signalAlways1 (M/T vehicles normally
remain at 1)
POSITIONShift position determined by the
A/T PNP switch signalAlways## (M/T vehicles normally
remain at ##)
YAW RATE SENYaw rate detected by yaw rate
sensorVehicle stopped Approx. 0 d/s
While driving -70 - 70d/s
ACCEL POS SIGThrottle open/close status (linked
to the accelerator pedal)Do not step on the accelerator pedal
(When ignition switch is on)0%
Step on the Brake pedal (When ignition
switch is on)0 to 100%
SIDE G-SENSOR Side G detected by side G sensorVehicle stopped
Approx. 0 m/s
2
While driving
-24.3 - 24.1 m/s2
ST ANGLE SIGSteering angle detected by steer-
ing angle sensorStraight-ahead condition Approx. 0°
Steering wheel turned -720 - 720°