2007 NISSAN 350Z steering

BRC-3
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BRC
Revision: 2006 November2007 350Z PREPARATION ......................................................... 78
Special Service Tools ............................................. 78
Commercial Service Tools ...................................... 78
ON-VEHICLE SERVICE ........................................... 79
Adjustment of Steering Angle Sensor Neutral Posi-
tion ......................................................................... 79
SYSTEM DESCRIPTION .......................................... 80
System Diagram ..................................................... 80
VDC Function ......................................................... 80
TCS Function ......................................................... 80
ABS Function ......................................................... 81
EBD Function ......................................................... 81
Hydraulic Circuit Diagram ...................................... 81
CAN Communication .............................................. 81
SYSTEM DESCRIPTION .................................... 81
TROUBLE DIAGNOSIS ............................................ 82
Fail-Safe Function .................................................. 82
VDC/TCS SYSTEM ............................................. 82
ABS, EBD SYSTEM ............................................ 82
How to Proceed With Diagnosis ............................. 82
BASIC CONCEPT ............................................... 82
DIAGNOSIS FLOWCHART ................................ 83
ASKING COMPLAINTS ...................................... 84
EXAMPLE OF DIAGNOSIS SHEET ................... 84
Component Parts Location ..................................... 85
Schematic .............................................................. 86
Wiring Diagram — VDC — ..................................... 87
Control Unit Input/Output Signal Standard ............. 94
REFERENCE VALUE FROM CONSULT-III ........ 94
CONSULT-III Functions (ABS) ............................... 96
CONSULT-III MAIN FUNCTION .......................... 96
Self-Diagnosis ........................................................ 96
OPERATION PROCEDURE ............................... 96
HOW TO ERASE SELF-DIAGNOSIS RESULTS ... 96
DISPLAY ITEM LIST ........................................... 97
Data Monitor ........................................................... 99
DISPLAY ITEM LIST ........................................... 99
Active Test ............................................................ 101
TEST ITEM ....................................................... 101
Correct and Quick Diagnosis ............................... 101
DIAGNOSIS PRECAUTIONS ........................... 101
ABS WARNING LAMP, VDC OFF INDICATOR
LAMP, SLIP INDICATOR LAMP AND BRAKE
WARNING LAMP ON/OFF TIMING .................. 103
Basic Inspection ................................................... 103
BRAKE FLUID AMOUNT, LEAKS, AND BRAKE
PADS INSPECTION .......................................... 103
POWER SYSTEM TERMINAL LOOSENESS
AND BATTERY INSPECTION .......................... 103
ABS WARNING LAMP, VDC OFF INDICATOR
LAMP, SLIP INDICATOR LAMP INSPECTION . 103
TROUBLE DIAGNOSIS FOR SYSTEM ................. 105
Wheel Sensor System .......................................... 105
INSPECTION PROCEDURE ............................ 105
Engine System ..................................................... 107
INSPECTION PROCEDURE ............................ 107
VDC/TCS/ABS Control Unit 1 .............................. 107
INSPECTION PROCEDURE ............................ 107Pressure Sensor System ......................................108
INSPECTION PROCEDURE ............................108
Steering Angle Sensor System .............................110
INSPECTION PROCEDURE ............................110
Yaw Rate/Side G Sensor System ..........................111
INSPECTION PROCEDURE .............................111
Solenoid and VDC Change-Over Valve System ...113
INSPECTION PROCEDURE ............................113
ABS Motor and Motor Relay System ....................116
INSPECTION PROCEDURE ............................116
Actuator Relay System .........................................118
INSPECTION PROCEDURE ............................118
Stop Lamp Switch System ....................................119
INSPECTION PROCEDURE ............................119
VDC/TCS/ABS Control Unit Power and Ground
Systems ................................................................120
INSPECTION PROCEDURE ............................120
VDC/TCS/ABS Control Unit 2 ...............................121
INSPECTION PROCEDURE ............................121
Brake Fluid Level Switch System .........................121
INSPECTION PROCEDURE ............................121
CAN Communication System ...............................122
INSPECTION PROCEDURE ............................122
Component Inspection ..........................................122
VDC OFF SWITCH ...........................................122
ABS MOTOR RELAY AND ACTUATOR RELAY .123
VDC/TCS/ABS ACTUATOR ..............................123
TROUBLE DIAGNOSIS FOR SYMPTOMS ............124
Excessive ABS Function Operation Frequency ....124
Unexpected Pedal Reaction .................................124
The Braking Distance Is Long ..............................125
The ABS Function Does Not Operate ..................125
Pedal Vibration or ABS Operation Sound Occurs .125
Vehicle Jerks During VDC/TCS/ABS Control .......126
WHEEL SENSORS .................................................128
Removal and Installation ......................................128
COMPONENTS .................................................128
REMOVAL .........................................................128
INSTALLATION .................................................128
VDC/TCS/ABS CONTROL UNIT ............................129
Removal and Installation ......................................129
REMOVAL .........................................................129
INSTALLATION .................................................129
SENSOR ROTOR ...................................................130
Removal and Installation ......................................130
REMOVAL .........................................................130
INSTALLATION .................................................130
VDC/TCS/ABS ACTUATOR ...................................131
Removal and Installation ......................................131
COMPONENTS .................................................131
G SENSOR ..............................................................132
Removal and Installation ......................................132
REMOVAL .........................................................132
INSTALLATION .................................................132
STEERING ANGLE SENSOR ................................133
Removal and Installation ......................................133
REMOVAL .........................................................133
INSTALLATION .................................................133

PRECAUTIONS
BRC-5
[ABS]
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Revision: 2006 November2007 350Z

When an error is indicated by ABS or another warning lamp, collect all necessary information from cus-
tomer (what symptoms are present under what conditions) and check for simple causes before starting
diagnostic servicing. Besides electrical system inspection, check booster operation, brake fluid level, and
oil leaks.

If tire size and type are used in an improper combination, or brake pads are not Genuine NISSAN parts,
stopping distance or steering stability may deteriorate.

If there is a radio, antenna, or antenna lead-in wire (including wiring) near control module, ABS function
may have a malfunction or error.

If aftermarket parts (car stereo, CD player, etc.) Have been installed, check for incidents such as harness
pinches, open circuits, and improper wiring.

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
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BRC-38
[TCS/ABS]
PRECAUTIONS
Revision: 2006 November2007 350Z
diagnostic servicing. Besides electrical system inspection, check booster operation, brake fluid level, and
oil leaks.

If tire size and type are used in an improper combination, or brake pads are not Genuine NISSAN parts,
stopping distance or steering stability may deteriorate.

If there is a radio, antenna, or antenna lead-in wire (including wiring) near control module, ABS function
may have a malfunction or error.

If aftermarket parts (car stereo, CD player, etc.) Have been installed, check for incidents such as harness
pinches, open circuits, and improper wiring.

BRC-62
[TCS/ABS]
TROUBLE DIAGNOSIS FOR SYSTEM
Revision: 2006 November2007 350Z
5. CHECK WHEEL SENSOR HARNESS
1. Turn ignition switch OFF and disconnect wheel sensor connec-
tor E42 (FR - LH) or E27 (FR - RH) or T5 (RR - RH, LH) and
ABS actuator and electric 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).
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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
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PRECAUTIONS
BRC-77
[VDC/TCS/ABS]
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Revision: 2006 November2007 350Z
Precautions for Brake ControlNFS0003T

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.

When an error is indicated by ABS or another warning lamp, collect all necessary information from cus-
tomer (what symptoms are present under what conditions) and check for simple causes before starting
diagnostic servicing. Besides electrical system inspection, check booster operation, brake fluid level, and
oil leaks.

If tire size and type are used in an improper combination, or brake pads are not Genuine NISSAN parts,
stopping distance or steering stability may deteriorate.

If there is a radio, antenna, or antenna lead-in wire (including wiring) near control module, ABS function
may have a malfunction or error.

If aftermarket parts (car stereo, CD player, etc.) Have been installed, check for incidents such as harness
pinches, open circuits, and improper wiring.

If the following components are replaced with non-genuine components or converted, the VDC OFF indi-
cator lamp and SLIP indicator lamp may turn on or the VDC system may not operate properly. Compo-
nents related to suspension (Shock Absorber, Strut, Spring, Bush, etc.), Tires, wheels (exclude specified
size), components related to brake (Pad, Rotor, Caliper, etc.), Components related to engine (Muffler,
ECM, etc.), Components related to body reinforcement (Roll bar, Tower bar, etc.).

Driving in the condition of breakage or excessive wear of the suspension, tires or components related to
the brakes may cause the VDC OFF indicator lamp and the SLIP indicator lamp to turn on, and the VDC
system may not operate properly.

When the TCS or VDC is activated by sudden acceleration or sudden turn, some noise may occur if the
brake pedal is used. The noise is a result of the normal operation of the TCS and VDC.

When driving on roads which have extreme slopes (such as mountainous roads) or high banks (such as
sharp carves on a freeway), the VDC may not operate normally, or the VDC warning lamp may turn on.
However, this is not a problem if normal operation can be resumed after restarting the engine.

Sudden turns (such as spin turns, acceleration turns), drifting, etc. When VDC function is OFF (VDC SW
ON) may cause the yaw rate/side G -sensor system indicate a problem. However this is not a problem if
normal operation can be resumed after restarting the engine.

ON-VEHICLE SERVICE
BRC-79
[VDC/TCS/ABS]
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Revision: 2006 November2007 350Z
ON-VEHICLE SERVICEPFP:00000
Adjustment of Steering Angle Sensor Neutral PositionNFS0003W
In case of doing work that applies to the list below, make sure to adjust neutral position of steering angle sen-
sor before running vehicle.
×: Required
–: Not required
1. Stop vehicle with front wheels in straight-ahead position.
2. Turn ignition switch ON and in the following order touch “ABS” “WORK SUPPORT” “ANGLE SENSOR
ADJUSTMENT” in CONSULT-III screen.
3. Touch “START”.
CAUTION:
Do not touch steering wheel while adjusting steering angle sensor.
4. After approximately 10 seconds, touch “END”. (After approximately 60 seconds, it ends automatically.)
5. Turn ignition switch OFF, then turn it ON again.
CAUTION:
Be sure to carry out above operation.
6. Run vehicle with front wheels in straight-ahead position, then stop.
7. Select “DATA MONITOR”, “ECU INPUT SIGNALS”, and “STEERING ANGLE SIGNAL” on CONSULT-III
screen. Then check that “STEERING ANGLE SIGNAL” is within 0±2.5°. If value is more than specifica-
tion, repeat steps 1 to 7.
8. Erase memory of VDC/TCS/ABS control unit and ECM.
9. Turn ignition switch to OFF.
Situation Adjustment of Steering Angle Sensor Neutral Position
Removing/Installing VDC/TCS/ABS control unit−
Replacing VDC/TCS/ABS control unit×
Removing/Installing steering angle sensor×
Removing/Installing steering components×
Removing/Installing suspension components×
Change 4 tires to new ones–
Tire rotation–
Adjusting wheel alignment×

BRC-80
[VDC/TCS/ABS]
SYSTEM DESCRIPTION
Revision: 2006 November2007 350Z
SYSTEM DESCRIPTIONPFP:00000
System DiagramNFS0003X
VDC FunctionNFS0003Y

In addition to the TCS/ABS function, the driver steering amount and brake operation amount are detected
from the steering angle sensor and pressure sensor, and the vehicle's driving status (amount of under-
steering / over-steering) is determined from information from the yaw rate/side G sensor, wheel sensor,
etc., and this information is used to improve vehicle stability by controlling the braking and engine power
to all four wheels.

The SLIP indicator lamp flashes to inform the driver of VDC operation.

During VDC operation, the body and brake pedal lightly vibrate and mechanical noises may be heard.
This is normal.

The ABS warning lamp, VDC OFF indicator lamp, and SLIP indicator lamp might turn on when the vehicle
is subject to strong shaking or large vibration, such as when the vehicle is on a turn table or a ship while
the engine is running. In this case, restart the engine on a normal road, and if the ABS warning lamp, VDC
OFF indicator lamp, and SLIP indicator lamp turn off, there is no problem.
TCS FunctionNFS0003Z

The wheel spin of the drive wheels is detected by the VDC/TCS/ABS control unit from the wheel speed
signals from the four wheels, so if wheel spin occurs, the rear wheel right and left brake fluid pressure
control and engine fuel cut are conducted while the throttle value is restricted to reduce the engine torque
and decrease the amount of wheel spin. In addition, the degree the throttle is opened is controlled to
achieve the optimum engine torque.

Depending on road circumstances, the driver may have a sluggish feel. This is normal, because the opti-
mum traction has the highest priority under TCS operation.

TCS may be activated any time the vehicle suddenly accelerates, suddenly downshifts, or is driven on a
road with a varying surface friction coefficient.

During TCS operation, it informs a driver of system operation by flashing SLIP indicator lamp.
SFIA1885E