2007 NISSAN 350Z ignition

BRC-122
[VDC/TCS/ABS]
TROUBLE DIAGNOSIS FOR SYSTEM
Revision: 2006 November2007 350Z
2. CHECK CONNECTOR
1. Disconnect brake fluid level switch connector and VDC/TCS/ABS control unit connector and check termi-
nal for deformation, disconnection, looseness, and so on. If there is any non-standard condition, repair or
replace the terminal.
2. Securely reconnect the connectors 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 HARNESS BETWEEN THE BRAKE FLUID LEVEL SWITCH AND THE VDC/TCS/ABS CON-
TROL UNIT
1. Turn ignition switch OFF and disconnect brake fluid level switch
connector, VDC/TCS/ABS control unit, connectors.
2. Check continuity between brake fluid level switch connector E44
and VDC/TCS/ABS control unit connector B114.
OK or NG
OK >> Connect connectors and conduct a VDC/TCS/ABS con-
trol unit self-diagnosis.
NG >> If the open or short in harness, repair or replace the harness.
CAN Communication SystemNFS0004Q
INSPECTION PROCEDURE
1. CHECK CONNECTOR
1. Turn ignition switch OFF, disconnect the VDC/TCS/ABS control unit connector, and check the 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.
Component InspectionNFS0004R
VDC OFF SWITCH

Turn ignition switch OFF, and disconnect the VDC OFF switch
connector M9, and check the continuity between terminals 1 and
2.
VDC/TCS/ABS control unit Brake fluid level switch Continuity
401Yes
Ground No
Ground 2 Yes
SFIA1898E
1 - 2 :Continuity should exist when pushing the
switch.
continuity should not exist when releasing
the switch.
SFIA1899E

TROUBLE DIAGNOSIS FOR SYSTEM
BRC-123
[VDC/TCS/ABS]
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BRC
Revision: 2006 November2007 350Z
ABS MOTOR RELAY AND ACTUATOR RELAY

Turn ignition switch OFF and disconnect the VDC relay box con-
nector E47, E48, E222.

Apply a voltage of 12 V between the ABS motor relay terminal 8
and the actuator relay terminal 7 and then check the continuity
between the following terminals.
VDC/TCS/ABS ACTUATOR
Actuator Operation Inspection
1. Turn ignition switch ON, apply a voltage of 12 V between the
relay box terminal 5 and 8, use an oscilloscope to measure the
motor voltage at this time (between terminal 11 and the ground),
and check the motor reverse voltage occurrence time when
operation is stopped.
CAUTION:

The above check should be performed after motor relay
unit inspection to make sure relay operates normally.

To prevent overheating, do not drive actuator motor more
than 4 seconds.

The motor reverse voltage occurrence time is standard
when the battery voltage is 12 V and the air temperature is
20°C (68°F), and this time is a little shorter when the battery
voltage is low or the air temperature is low.
ABS motor relay Between terminal 4 to 10 Continuity should exist.
Actuator relay Between terminal 9 to 12 Continuity should exist.
PFIA0287E
Motor counter-electromotive force duration:
0.1 second or more
SFIA1900E

BRC-124
[VDC/TCS/ABS]
TROUBLE DIAGNOSIS FOR SYMPTOMS
Revision: 2006 November2007 350Z
TROUBLE DIAGNOSIS FOR SYMPTOMSPFP:00007
Excessive ABS Function Operation FrequencyNFS0004S
1. CHECK START
Check brake force distribution.
OK or NG
OK >> GO TO 2.
NG >> Check brake system
2. CHECK FRONT AND REAR AXLE
Make sure there is no excessive play in the front and rear axles.
OK or NG
OK >> GO TO 3.
NG >> Repair.
3. CHECK WHEEL SENSOR AND SENSOR ROTOR
Wheel Sensor Inspection

Wheel sensor mount and damage inspection

Sensor rotor mount and damage inspection

Wheel sensor connector connection inspection

Wheel sensor harness inspection
OK or NG
OK >> GO TO 4.
NG >>

Replace wheel sensor or sensor rotor.

Repair harness.
4. CHECK ABS WARNING LAMP DISPLAY
Make sure the warning lamp turns off approximately 1 sec. After the ignition switch is turned on or when driv-
ing.
OK or NG
OK >> Normal
NG >> Perform self-diagnosis. Refer to BRC-96, "
OPERATION PROCEDURE" .
Unexpected Pedal ReactionNFS0004T
1. CHECK BRAKE PEDAL STROKE
Check brake pedal stroke.
Is the stroke too big?
YES >>
Bleed air from the brake piping.

Check the brake pedal, brake booster, and master cylinder mount for play, looseness, and
brake system for fluid leaks, etc. If any malfunctions are found, make repair.
NO >> GO TO 2.
2. CHECK FUNCTION
Disconnect the VDC/TCS/ABS control unit connector and make sure the braking force is sufficient when the
ABS in not operating. After the inspection, reconnect the connector.
OK or NG
OK >> GO TO 3. CHECK WHEEL SENSOR AND SENSOR ROTOR in BRC-124, "Excessive ABS Func-
tion Operation Frequency" .
NG >> Check brake system.

TROUBLE DIAGNOSIS FOR SYMPTOMS
BRC-125
[VDC/TCS/ABS]
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BRC
Revision: 2006 November2007 350Z
The Braking Distance Is LongNFS0004U
CAUTION:
On slippery road surfaces, the stopping distance might be longer with the ABS operating than when
the ABS is not operating.
1. CHECK FUNCTION
Disconnect VDC/TCS/ABS control unit connector to deactivate ABS. In this condition, check stopping dis-
tance. After inspection, connect connector.
OK or NG
OK >> GO TO 3. CHECK WHEEL SENSOR AND SENSOR ROTOR in BRC-124, "Excessive ABS Func-
tion Operation Frequency" .
NG >>

Bleed air from the brake piping.

Check brake system.
The ABS Function Does Not OperateNFS0004V
CAUTION:
The ABS does not operate when the speed is 10 km/h (6 MPH) or less.
1. CHECK ABS WARNING LAMP DISPLAY
Make sure the warning lamp turns off approximately 1 second after the ignition switch is turned on or when
driving.
OK or NG
OK >> GO TO 3. CHECK WHEEL SENSOR AND SENSOR ROTOR in BRC-124, "Excessive ABS Func-
tion Operation Frequency" .
NG >> Perform self-diagnosis. Refer to BRC-96, "
OPERATION PROCEDURE" .
Pedal Vibration or ABS Operation Sound OccursNFS0004W
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 [50 mm (1.97 in) or more]

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 the engine is started.
Does the symptom occur?
YES >> GO TO 2.
NO >> Perform self-diagnosis. Refer to BRC-96, "
OPERATION PROCEDURE" .
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 the control unit (or its wir-
ing), and if there is, move it farther away.
NO >> GO TO 3. CHECK WHEEL SENSOR AND SENSOR ROTOR in BRC-124, "
Excessive ABS Func-
tion Operation Frequency" .