ignition NISSAN 350Z 2007 Z33 Brake Control System Workshop Manual

BRC-4
[ABS]
PRECAUTIONS
Revision: 2006 November2007 350Z
[ABS]PRECAUTIONSPFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
NFS0001M
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 ServiceNFS0001N
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 SystemNFS0001O

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 to clean. They will ruin rubber parts and cause
improper operation.

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 ABS actuator and electric unit (control unit) or
the battery negative terminal.
WARNING:
Clean brake pads and shoes with a waste cloth, then wipe with a dust collector.
Precautions for Brake ControlNFS0001P

During ABS operation, brake pedal lightly vibrates and a mechanical noise may be heard. This is normal.

Just after starting vehicle after ignition switch ON, brake pedal may vibrate or motor operating noise may
be heard from engine compartment. This is a normal status of operation check.

Stopping distance may be longer than that of vehicles without ABS when vehicle drives on rough, gravel,
or snow-covered (fresh, deep snow) roads.
SBR686C

TROUBLE DIAGNOSIS
BRC-9
[ABS]
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Revision: 2006 November2007 350Z
TROUBLE DIAGNOSISPFP:00004
Fail-Safe FunctionNFS000II
ABS, EBD SYSTEM
In case of electrical problems with the ABS, the ABS warning lamp will turn on. In case of electrical problems
with the EBD, brake warning lamp, ABS warning lamp will turn on. Simultaneously, the ABS become one of
the following conditions of the Fail-Safe function.

For ABS trouble, only the EBD is activated and the condition of the vehicle is the same condition of vehi-
cle without ABS equipment.
NOTE:
ABS self diagnosis sound may be heard. That is a normal condition because a self diagnosis for “Ignition
switch ON” and “The first starting” are being performed.

For EBD trouble, The EBD and ABS become inoperative, are the condition of the vehicle is the same as
the condition of vehicles without ABS, EBD equipment.
How to Proceed with DiagnosisNFS0001Y
BASIC CONCEPT

Most important point to perform diagnosis is to understand systems (control and mechanism) in vehicle
thoroughly.

It is also important to clarify customer complaints before inspec-
tion.
First of all, reproduce symptom, and understand it fully.
Ask customer about his/her complaints carefully. In some cases,
it will be necessary to check symptom by driving vehicle with
customer.
NOTE:
Customers are not professionals. Do not assume “maybe cus-
tomer means...” or “maybe customer mentioned this symptom”.

It is essential to check symptoms right from beginning in order to
repair a malfunction completely.
For an intermittent malfunction, it is important to reproduce
symptom based on interview with customer and past examples.
Do not perform inspection on ad hoc basis. Most intermittent
malfunctions are caused by poor contacts. In this case, it will be
effective to shake suspected harness or connector by hand.
When repairs are performed without any symptom check, no
one can judge if malfunction has actually been eliminated.

After diagnosis, make sure to carry out “erase memory”. Refer to
BRC-19, "
HOW TO ERASE SELF-DIAGNOSIS RESULTS" .

For an intermittent malfunction, move harness or harness con-
nector by hand to check poor contact or false open circuit.

Always read “GI General Information” to confirm general precautions. Refer to GI-3, "General Precau-
tions" .
EFJ0028D
SEF233G

BRC-18
[ABS]
TROUBLE DIAGNOSIS
Revision: 2006 November2007 350Z
Control Unit Input/Output Signal StandardNFS00022
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.
Note 1: Confirm tire pressure is normal.
Note 2: Serves as EBD warning lamp.
Note 3: ON/OFF timing of ABS warning lamp
ON: For approximately 1 second after the ignition switch is turned on or when an error is detected.
OFF: Approximately 1 second after the ignition switch is turned on (when system is normal).Monitor item Display ContentData monitor
ConditionReference values for normal
operation
WHEEL SENSORWheel 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
EBD WARN LAMPBrake warning lamp on condition
(Note 2)Brake warning lamp ON ON
Brake warning lamp OFF OFF
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 3)ABS warning lamp ON ON
ABS warning lamp OFF OFF
BATTERY VOLTBattery voltage supplied to ABS
control unitIgnition switch ON 10 - 16V
GEARDetermined gear shift position
from the A/T PNP switch signalDrivingM/T vehicles are always left
in 1.
ENGINE RPM Engine runningWith engine stopped 0 rpm
With engine runningAlmost in accordance with
tachometer display
FAIL SIGNAL Fail signal statusDuring ABS fail-safe
During EBD fail-safeON

TROUBLE DIAGNOSIS
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Note 1: After completing repairs of the shorted sensor circuit, when ignition switch is turned ON, ABS warning lamp turns on. Check that
ABS warning lamp turns off while driving the vehicle at approximately 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 the wheels, check the wheel sensor circuit and also check the
control unit power voltage.
Note 2: When errors are detected in several systems, including the CAN communication system [U1000], troubleshoot the CAN commu-
nication system.
Data MonitorNFS000HE
DISPLAY ITEM LIST
×: Standard –: Not applicable : Option EMERGENCY BRAKE
[C1153]When the ABS actuator and electric unit (control unit) malfunctions (pressure
increase is too much or too little).BRC-31, "
ABS Actua-
tor and Electric Unit
(Control Unit) 2"
CAN COMM CIRCUIT
[U1000]When ABS actuator and electric unit (control unit) is not transmitting or receiv-
ing CAN communication signal for 2 seconds or more.BRC-31, "CAN Com-
munication System"
(Note 2) Display item Malfunction detecting condition Check item
Item (Unit)SELECT MONITOR ITEM
Remarks
ECM INPUT
SIGNALSMAIN SIGNALSSELECTION
MENU
FR LH SENSOR
[km/h (MPH)]××Wheel speed calculated by front LH wheel sensor sig-
nal is displayed.
FR RH SENSOR
[km/h (MPH)]××Wheel speed calculated by front RH wheel sensor sig-
nal 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 sig-
nal 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 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 displayed.
STOP LAMP SW
(ON/OFF)××Stop lamp switch (ON/OFF) status is displayed.
MOTOR RELAY
(ON/OFF)—×ABS motor relay (ON/OFF) condition is displayed.
ACTUATOR RLY
(ON/OFF)—×ABS actuator relay (ON/OFF) status is displayed.
ABS WARN LAMP
(ON/OFF)—×ABS warning lamp (ON/OFF) status is displayed.
BATTERY VOLT
(V )××The voltage supplied to the ABS control unit is dis-
played.

TROUBLE DIAGNOSIS
BRC-23
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Revision: 2006 November2007 350Z
Correct and Quick DiagnosisNFS00024
DIAGNOSIS PRECAUTIONS

Before performing the trouble diagnosis, always read the general information (GI) to confirm the general
precautions. Refer to GI-3, "
General Precautions" .

After completing service, always erase the self-diagnosis results. Refer to BRC-19, "HOW TO ERASE
SELF-DIAGNOSIS RESULTS" .

When inspection of the continuity or voltage between units is performed, check connector terminals for
disconnection, looseness, bend, or collapse. If any non-standard condition is detected, repair or replace
applicable part.

Intermittent errors may be caused by a poor connection in the harness, connector, or terminal. Move har-
nesses, harness connectors, or terminals by hand to make sure all connections are solid and undamaged.

If a circuit tester is used for the check, be careful not to forcibly extend any connector terminal.

ABS is a system that uses electronic control to perform brake control and engine power control. There-
fore, phenomena like those shown in the following table may occur, but this is because the system is
working normally.
ABS WARNING LAMP ON/OFF TIMING
×: ON –: OFF
Basic InspectionNFS00025
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 for leaks. If there is leaking or oozing fluid, check
following items.

If ABS actuator 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 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 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, 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 ABS actuator 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”.
Symptom Symptom description Result
Motor operation noiseThis is the sound of the motor operating inside ABS actuator, and there
may be some low sounds while the ABS is operating.
Normal
Just after the engine starts, the motor operating noise may be heard. This
is a normal status of the system operation check.
System operation check noiseWhen the engine is started, you may barely be able to hear a slight thud-
ding sound from the engine room, but this sound is made by the system
operation check and is normal.Normal
ABS operation
(longer stopping distance)Stopping distance may be longer for vehicles with ABS when the vehicle
drives on rough or snow-covered roads. Use lower speeds when driving on
these kinds of roads.Normal
Condition ABS warning lamp Remarks
Ignition switch OFF — —
For approximately “1” second after ignition switch ON×—
After approximately “1” second after ignition switch ON.
(When system is normal)— Turns off 2 second after engine start
ABS error×When there is an ABS actuator and electric unit
error (power or ground error)

BRC-24
[ABS]
TROUBLE DIAGNOSIS
Revision: 2006 November2007 350Z
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.
ABS WARNING LAMP INSPECTION
1. Make sure ABS warning lamp turned on approximately 1 second when the ignition switch is turned ON.
Check CAN communications. Refer to BRC-31, "
CAN Communication System" .
2. Make sure lamp turns off approximately 1 second after the ignition switch is turned on. If the lamp does
not turn off, conduct self-diagnosis.
3. Make sure ABS warning lamp turn off 2 seconds after the engine is started. If ABS warning lamp has not
turned off 10 seconds after the engine has been started, conduct self-diagnosis of the ABS actuator and
electric unit.
4. After conducting the self-diagnosis, be sure to erase the error memory. Refer to BRC-19, "
HOW TO
ERASE SELF-DIAGNOSIS RESULTS"

BRC-26
[ABS]
TROUBLE DIAGNOSIS FOR SYSTEM
Revision: 2006 November2007 350Z
5. CHECK WHEEL SENSOR HARNESS
1. Turn ignition switch OFF and disconnect the wheel sensor con-
nector E42 (FR - LH) or E27 (FR - RH) or T5 (RR - RH, LH) and
ABS control unit (control unit) connector E51.
2. Check continuity between terminals. (Also check the continuity
when the steering wheel is turned right and left and when the
sensor harness inside the wheel well is moved.)
OK or NG
OK >> GO TO 6.
NG >> Repair or replace harness and connector that have malfunction.
6. CHECK WHEEL SENSOR POWER SUPPLY CIRCUIT
1. Disconnect malfunctioning wheel sensor connector.
2. Turn ignition switch ON and check voltage between wheel sen-
sor harness connector power supply terminal and ground.
OK or NG
OK >> Replace wheel sensor.
NG >> Replace ABS actuator and electric unit (control unit).
SFIA3245E
Power system Signal system Ground system
WheelABS actuator
and electric unit
(control unit)Wheel sensorABS actuator and
electric unit
(control unit)Wheel sensorABS actuator
and electric unit
(control unit)
(signal)ABS actuator
and electric unit
(control unit)
(ground)
Front RH 24 1 9 2 24, 9
16, 30 Front LH 22 1 7 2 22, 7
Rear RH 28 1 13 2 28, 13
Rear LH 26 3 11 4 26, 11
Power system : Continuity should exist.
Signal system : Continuity should exist.
Ground system : Continuity should not exist.
Wheel Wheel sensor Ground Voltage
Front RH
1
— 8 V or more Front LH
Rear RH
Rear LH 3
SFIA3399E

BRC-28
[ABS]
TROUBLE DIAGNOSIS FOR SYSTEM
Revision: 2006 November2007 350Z
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 connector terminals 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.
SFIA1880E
Signal nameABS actuator and electric unit
(control unit)Measurement condition Voltage
Power supply 29Ignition switch ONBattery voltage
(Approx. 12 V)
Ignition switch OFF Approx. 0 V
SFIA1881E
Signal nameABS actuator and electric unit
(control unit)Measurement condition Continuity
Ground 16, 30 Ignition switch OFF Yes

BRC-30
[ABS]
TROUBLE DIAGNOSIS FOR SYSTEM
Revision: 2006 November2007 350Z
Stop Lamp Switch SystemNFS0002B
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 E51 and stop lamp switch connector
E112, check the terminal for deformation, disconnection, looseness, and so on. If there is an error, repair
or replace the terminal.
2. Securely reconnect the connector and conduct self-diagnosis.
3. Start engine.
4. Repeat Pumping brake pedal carefully several times, then perform self-diagnosis again.
Is the result of self-diagnosis normal?
YES >> The connector terminal contact is loose, damaged, open or shorted.
NO >> GO TO 3.
3. CHECK STOP LAMP SWITCH
1. Turn ignition switch OFF and disconnect stop lamp switch con-
nector E111.
2. Disconnect stop lamp switch connector
3. Check continuity between stop lamp switch connector terminal 3
and 4.
OK or NG
OK >> GO TO 4.
NG >> Replace stop lamp switch. Refer to BR-8, "
Components" .
Self-diagnosis results
STOP LAMP SW
Stop lamp switch Condition Continuity
3 – 4Release stop lamp switch
(When brake pedal is depressed.)Ye s
Push stop lamp switch
(When brake pedal is released.)No
SFIA3390E

TROUBLE DIAGNOSIS FOR SYSTEM
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4. CHECK STOP LAMP SWITCH CIRCUIT
1. Turn ignition switch OFF and disconnect ABS actuator and electric unit (control unit) connector E51.
2. Check voltage between ABS actuator and electric unit (control
unit) connector terminal and ground.
OK or NG
OK >> INSPECTION END
NG >> Open or short in harness between ABS actuator and electric unit and stop lamp switch. Repair or
replace the harness.
ABS Actuator and Electric Unit (Control Unit) 2NFS0002C
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 SystemNFS0002D
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 connector 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