2007 NISSAN 350Z Brake Control System Workshop Manual

TROUBLE DIAGNOSIS
BRC-57
[TCS/ABS]
C
D
E
G
H
I
J
K
L
MA
B
BRC
Revision: 2006 November2007 350Z
Active TestNFS000IO
CAUTION:

Do not perform active test while driving.

Make sure to completely bleed air from the brake system.

The ABS and brake warning lamps turn on during the active test.
NOTE:

When the active test is conducted while depressing the pedal, the pedal depression amount will change,
but this is normal.

Approximately 10 seconds after the operation is begun, “TEST STOP” will be displayed.
TEST ITEM
Solenoid valve
CAUTION:
The example shown is for the front right wheel. The procedure for the other wheels is the same as
given below.
For ABS solenoid valve, touch “UP”, “KEEP”, and “DOWN”.Then use screen monitor to check that solenoid
valve operates as shown in the table below.
*: ON for 1 to 2 seconds after the touch, and then OFF
ABS Motor
Touch “ON”, “OFF” on the display screen and make sure the ABS motor relay is operating as shown in the
table below.
Correct and Quick DiagnosisNFS00036
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-53, "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.

TCS/ABS is a system that uses electronic control to perform brake control and engine power control.
Therefore, phenomena like those shown in the following table may occur, but this is because the system is
working normally.
OperationABS solenoid valve
UP KEEP DOWN
FR RH IN SOL OFF ON ON
FR RH OUT SOL OFF OFF ON*
Operation ON OFF
MOTOR RELAY ON OFF
ACTUATOR RLY ON ON
Symptom Symptom description Result
Motor operation noiseThis is the sound of the motor operating inside ABS actuator and electric unit
(control unit), and there may be some low sounds while TCS or ABS is oper-
ating.
Normal
Just after the engine starts, the motor operating noise may be heard. This is
a normal status of the system operation check.

BRC-58
[TCS/ABS]
TROUBLE DIAGNOSIS
Revision: 2006 November2007 350Z
System operation check noiseWhen the engine is started, you may barely be able to hear a slight thudding
sound from the engine room, but this sound is made by the system operation
check and is normal.Normal
TCS operation
(SLIP indicator lamp ON)TCS may be activated any time the vehicle suddenly accelerates, suddenly
downshifts, or is driven on a road with a varying surface friction coefficient.
Normal
When conducting the
inspection on a chas-
sis dynamometer,
cancel the TCS func-
tion. When inspecting the speedometer, etc., press TCS OFF switch to turn off
TCS function before conducting the work.
When accelerator pedal is depressed on a chassis dynamometer (front
wheel fixing type), the vehicle speed will not increase. This is normal,
because TCS is activated by the stationary front wheels. The warning lamp
may also turn on to show “sensor system error” in this case. This is not a
malfunction either, because the stationary front wheels are detected. Restart
engine, and drive the vehicle at 30 km/h (19 MPH) or more or higher to
check that the warning lamp no longer turns on.
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
Sluggish feelDepending on road circumstances, the driver may have a sluggish feel. This
is normal, because under TCS operation optimum traction has the highest
priority (safety first). Sometimes the driver has a slight sluggish feel in
response to substantial accelerator pedal operation.Normal Symptom Symptom description Result

TROUBLE DIAGNOSIS
BRC-59
[TCS/ABS]
C
D
E
G
H
I
J
K
L
MA
B
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-60
[TCS/ABS]
TROUBLE DIAGNOSIS
Revision: 2006 November2007 350Z
ABS WARNING LAMP, TCS OFF INDICATOR LAMP, SLIP INDICATOR LAMP INSPECTION
1. Make sure ABS warning lamp, TCS OFF indicator lamp (when TCS OFF switch is OFF), and SLIP indica-
tor lamp turns ON approximately 1 second when the ignition switch is turned ON. If they do not, check the
TCS OFF indicator lamp and then TCS OFF switch. Refer to BRC-68, "
TCS OFF SWITCH" . Check CAN
communications. Refer to “CAN Communication Inspection”. If there are no errors with TCS OFF switch
and CAN communication system, check combination meter. Refer to BRC-67, "
CAN Communication Sys-
tem" .
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. With the engine running, make sure TCS OFF indicator lamp turns on and off when TCS OFF switch is
turned on and off. If the indicator lamp status does not correspond to switch operation, check the TCS
OFF switch system. Refer to BRC-68, "
TCS OFF SWITCH" .
4. Make sure ABS warning lamp, TCS OFF indicator lamp, and SLIP indicator lamp turn off 2 seconds after
the engine is started. If ABS warning lamp, TCS OFF indicator lamp, and SLIP indicator lamp have not
turned off 10 seconds after the engine has been started, conduct self-diagnosis of the ABS actuator and
electric unit (control unit).
5. After conducting the self-diagnosis, be sure to erase the error memory. Refer to BRC-53, "
HOW TO
ERASE SELF-DIAGNOSIS RESULTS" .

TROUBLE DIAGNOSIS FOR SYSTEM
BRC-61
[TCS/ABS]
C
D
E
G
H
I
J
K
L
MA
B
BRC
Revision: 2006 November2007 350Z
TROUBLE DIAGNOSIS FOR SYSTEMPFP:00000
Wheel Sensor SystemNFS00038
After using the CONSULT-III SELF-DIAG RESULTS to determine the location of the malfunctioning wheel sen-
sor, check all areas to determine the component to be replaced.
CAUTION:

Do not measure the resistance value and also voltage between the sensor terminal with tester etc.,
because the sensor is an active sensor.

Do not expand the terminal of the connector with a/the tester terminal stick, when it does the
inspection with the tester.
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 TIRE
Check air pressure, wear, and size.
Are the air pressure, wear, and size within the standard values?
YES >> GO TO 3.
NO >> Adjust air pressure, or replace tire.
3. CHECK SENSOR AND SENSOR ROTOR

Check the condition of the sensor mount (for looseness, etc.).

Check the surface of the front sensor rotor rubber for damage.

Check the rear sensor rotor for damage.
OK or NG
OK >> GO TO 4.
NG >> Repair wheel sensor mount or replace the sensor rotor.
4. CHECK CONNECTOR
1. Disconnect ABS actuator and electric unit (control unit) connector and malfunctioning wheel sensor con-
nector E42 (FR - LH) or E27 (FR - RH) or T5 (RR - RH, LH). Check the terminal to see if it is deformed,
disconnected, loose, etc., and replace it if any non-standard condition is found.
2. Reconnect connector, drive at a speed of approximately 30 km/h (19 MPH) or more for approximately 1
minute, 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 5.
Self-diagnosis results
FR RH SENSOR -1, -2
FR LH SENSOR -1, -2
RR RH SENSOR -1, -2
RR LH SENSOR -1, -2

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).
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

TROUBLE DIAGNOSIS FOR SYSTEM
BRC-63
[TCS/ABS]
C
D
E
G
H
I
J
K
L
MA
B
BRC
Revision: 2006 November2007 350Z
Engine SystemNFS00039
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 ENGINE SYSTEM
1. Conduct an ECM self-diagnosis and repair or replace any non-standard items. Re-conduct ECM self-diag-
nosis.
2. Re-conduct ABS actuator and electric unit (control unit) self-diagnosis.
OK or NG
OK >> INSPECTION END
NG >> Repair or replace any non-standard items. Re-conduct the self-diagnosis.
ABS Actuator and Electric Unit (Control Unit)NFS0003A
INSPECTION PROCEDURE
1. CHECK SELF-DIAGNOSIS RESULTS
Check self-diagnosis results.
Is the above displayed in the self-diagnosis display items?
YES >> Replace ABS actuator and electric unit (control unit). Re-conduct the self-diagnosis.
NO >> INSPECTION END
Self-diagnosis results
ENGINE SIGNAL 1
ENGINE SIGNAL 2
ENGINE SIGNAL 3
ENGINE SIGNAL 4
ENGINE SIGNAL 5
ENGINE SIGNAL 6
Self-diagnosis results
CONTROLLER FAILURE

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