display NISSAN 350Z 2007 Z33 Brake Control System Repair Manual

BRC-120
[VDC/TCS/ABS]
TROUBLE DIAGNOSIS FOR SYSTEM
Revision: 2006 November2007 350Z
4. CHECK STOP LAMP SWITCH CIRCUIT
1. Turn ignition switch OFF and disconnect VDC/TCS/ABS control
unit connector B114.
2. Check voltage between VDC/TCS/ABS control unit connector
B114 terminal 48 and ground.
OK or NG
OK >> Connect the connectors and conduct a VDC/TCS/ABS control unit self-diagnosis.
NG >> Open or short in harness. Repair or replace the harness.
VDC/TCS/ABS Control Unit Power and Ground SystemsNFS0004N
INSPECTION PROCEDURE
1. CHECK SELF-DIAGNOSIS RESULTS
Check self-diagnosis results.
Is the above displayed in the self-diagnosis item?
YES >> GO TO 2.
NO >> INSPECTION END
2. CHECK CONNECTOR
1. Disconnect VDC/TCS/ABS control unit connector and 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 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.
SFIA1896E
VDC/TCS/ABS control unit Ground Measurement condition Voltage
48 —Brake pedal depressed.Battery voltage
(Approx. 12 V)
Brake pedal not depressed. Approx. 0 V
Self-diagnosis results
BATTERY VOLTAGE [ABNORMAL]

TROUBLE DIAGNOSIS FOR SYSTEM
BRC-121
[VDC/TCS/ABS]
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Revision: 2006 November2007 350Z
3. CHECK VDC/TCS/ABS CONTROL UNIT POWER AND GROUND CIRCUIT
1. Disconnect VDC/TCS/ABS control unit connector B114.
2. With the ignition switch turned on and off, check voltage
between VDC/TCS/ABS control unit connector and ground.
3. Check continuity between VDC/TCS/ABS control unit and
ground.
OK or NG
OK >> Check battery (terminal looseness, low voltage, etc.) For
any non-standard condition. If any non-standard condi-
tion exists, recharge or replace battery as necessary.
NG >> The corresponding harness circuit is open or shorted.
Repair the circuit.
VDC/TCS/ABS Control Unit 2NFS0004O
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 VDC/TCS/ABS control unit and re-conduct the self-diagnosis.
NO >> INSPECTION END
Brake Fluid Level Switch SystemNFS0004P
INSPECTION PROCEDURE
1. CHECK SELF-DIAGNOSIS RESULTS
1. Check brake reservoir tank fluid level. If the level is low, add brake fluid.
2. Erase the self-diagnosis results and check self-diagnosis results.
Is the above displayed in the self-diagnosis display items?
YES >> GO TO 2.
NO >> INSPECTION END
Signal name VDC/TCS/ABS control unit Ground Voltage
Power supply 1 —Battery voltage
(Approx. 12 V)
SFIA1903E
Signal name VDC/TCS/ABS control unit Ground Continuity
Ground 28, 29 — Yes
SFIA1897E
Self-diagnosis results
EMERGENCY BRAKE
Self-diagnosis results
BR FLUID LEVEL LOW

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

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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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" .

BRC-126
[VDC/TCS/ABS]
TROUBLE DIAGNOSIS FOR SYMPTOMS
Revision: 2006 November2007 350Z
Vehicle Jerks During VDC/TCS/ABS ControlNFS0004X
1. CHECK ENGINE SPEED SIGNAL
Conduct CONSULT-III VDC/TCS/ABS control unit “Data Monitor”.
Is engine speed at idle 400 rpm or higher?
YES >> GO TO 3.
NO >> GO TO 2.
2. CHECK ECM SELF-DIAGNOSIS RESULT ITEM
Perform ECM self-diagnosis.
Are self-diagnosis items displayed?
YES >> Check the corresponding items. Refer to EC-81, "TROUBLE DIAGNOSIS" in “Engine Control
(EC section)”.
NO >> GO TO 3.
3. SYMPTOM CHECK 1
Check if the vehicle jerks during VDC/TCS/ABS control.
OK or NG
OK >> INSPECTION END
NG >> GO TO 4.
4. CHECK A/T SELF-DIAGNOSIS RESULTS ITEM
Perform A/T self-diagnosis.
OK or NG
OK >> GO TO 5.
NG >> Check the corresponding items. Refer to AT- 4 0 , "
TROUBLE DIAGNOSIS" in “A/T”.
5. SYMPTOM CHECK 2
Check if the vehicle jerks during VDC/TCS/ABS control.
OK or NG
OK >> INSPECTION END
NG >> GO TO 6.
6. CHECK SELF-DIAGNOSIS RESULT ITEM 1
Conduct self-diagnosis of the VDC/TCS/ABS control unit.
Are self-diagnosis items displayed?
YES >> Check the corresponding items, make repairs, and re-conduct the VDC/TCS/ABS control unit self-
diagnosis.
NO >> GO TO 7.
7. CHECK CONNECTOR
1. Disconnect the VDC/TCS/ABS control unit and the ECM connectors, check the terminals for deformation,
disconnection, looseness, and so on. If there is an error, repair or replace the connector.
2. Securely reconnect the connector and conduct self-diagnosis.
OK or NG
OK >> If the connector terminal contact is loose, damaged, open or shorted, repair or replace the con-
nector terminal.
NG >> GO TO 8.

TROUBLE DIAGNOSIS FOR SYMPTOMS
BRC-127
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Revision: 2006 November2007 350Z
8. CHECK SELF-DIAGNOSIS RESULT ITEM 2
Re-conduct the VDC/TCS/ABS control unit self-diagnosis.
Are self-diagnosis items displayed?
YES >> Repair or replace any non-standard items.
NO >> GO TO 9.
9. CHECK CIRCUIT BETWEEN VDC/TCS/ABS CONTROL UNIT AND THE ECM
Check CAN communication system. Refer to BRC-122, "
CAN Communication System" .
OK or NG
OK >> INSPECTION END
NG >> Connect the connectors, and re-conduct the VDC/TCS/ABS control unit self-diagnosis.