2007 NISSAN 350Z Brake Control System Workshop Manual

TROUBLE DIAGNOSIS FOR SYSTEM
BRC-113
[VDC/TCS/ABS]
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BRC
Revision: 2006 November2007 350Z
Solenoid and VDC Change-Over Valve SystemNFS0004J
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 VDC/TCS/ABS control unit connector and solenoid connector E49, E50 and check the termi-
nals for deformation, disconnection, looseness, and so on. If there is an error, repair or replace the termi-
nal.
2. Securely reconnect the connectors and then preform self-diagnosis.
Is the result of self-diagnosis normal?
YES >> The connector terminal contact is loose, damaged, open or shorted.
NO >> GO TO 3.
Self-diagnosis results
IN ABS SOL
OUT ABS SOL
USV LINE [FL-RR]
USV LINE [FR-RL]
HSV LINE [FL-RR]
HSV LINE [FR-RL]

BRC-114
[VDC/TCS/ABS]
TROUBLE DIAGNOSIS FOR SYSTEM
Revision: 2006 November2007 350Z
3. CHECK SOLENOID INPUT SIGNAL
1. Turn ignition switch OFF and disconnect VDC/TCS/ABS control
unit connector.
2. Check resistance between VDC/TCS/ABS control unit connec-
tor and ground.
OK or NG
OK >> Check the VDC/TCS/ABS control unit power system. Refer to BRC-120, "VDC/TCS/ABS Control
Unit Power and Ground Systems" .
NG >> GO TO 4.
PFIA0287E
VDC/TCS/ABS control unit Ground Resistance value
26
—6.0 – 11 Ω 5
6
53
55
3.0 – 5.0 Ω 3
4
25
49
6.0 – 11 Ω
50
54
3.0 – 5.0 Ω
52

TROUBLE DIAGNOSIS FOR SYSTEM
BRC-115
[VDC/TCS/ABS]
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BRC
Revision: 2006 November2007 350Z
4. CHECK SOLENOID HARNESS
1. Disconnect VDC actuator connector.
2. Check continuity between VDC/TCS/ABS control unit connector
B114 and VDC actuator connector E49.
OK or NG
OK >> Replace VDC/TCS/ABS actuator assembly.
NG >> Open or short in harness. Repair or replace the harness.
SFIA3266E
VDC/TCS/ABS control unit VDC actuator Continuity
26 3
Ye s 51
67
53 5
55 15
314
417
25 16
49 26
50 25
54 28
52 27

BRC-116
[VDC/TCS/ABS]
TROUBLE DIAGNOSIS FOR SYSTEM
Revision: 2006 November2007 350Z
ABS Motor and Motor Relay SystemNFS0004K
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 VDC relay box connector E47, E48, E222 and VDC/TCS/ABS control unit connector and
check the terminals for deformation, disconnection, looseness, and so on. If there is an error, repair or
replace the terminal.
2. Securely reconnect the connectors and then preform 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 MOTOR AND MOTOR RELAY POWER SYSTEM
1. Disconnect VDC relay box connectors E48.
2. Check voltage between VDC relay box connector and ground.
OK or NG
OK >> GO TO 4.
NG >> The circuit between battery and VDC relay box terminal
10 is open or shorted. Repair the circuit.
Self-diagnosis results
PUMP MOTOR
VDC relay box Ground Voltage
10 — Battery voltage (Approx. 12 V)
SFIA1892E

TROUBLE DIAGNOSIS FOR SYSTEM
BRC-117
[VDC/TCS/ABS]
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BRC
Revision: 2006 November2007 350Z
4. CHECK ABS MOTOR AND MOTOR RELAY HARNESS
1. Turn ignition switch OFF and disconnect VDC/TCS/ABS control
unit connector B114 and VDC relay box connector E47.
2. Check continuity between VDC/TCS/ABS control unit connector
and VDC relay box vehicle side connector.
3. Check if the actuator motor operates when a 12 V voltage is
applied to the VDC relay box connector E222 terminal 12.
CAUTION:
Operate the actuator motor for 4 seconds or less to prevent
heat generation.
OK or NG
OK >> GO TO 5.
NG >> The actuator motor or actuator motor circuit open or short in harness. Repair or replace the actua-
tor motor or actuator motor circuit harness.
5. CHECK ABS MOTOR RELAY
ABS motor relay independent inspection. Refer toBRC-123, "
ABS MOTOR RELAY AND ACTUATOR RELAY"
.
OK or NG
OK >> Replace VDC actuator assembly.
NG >> Replace VDC relay box.
VDC/TCS/ABS control unit VDC relay box Continuity
20 4
Ye s
78
SFIA1893E
PFIA0288E

BRC-118
[VDC/TCS/ABS]
TROUBLE DIAGNOSIS FOR SYSTEM
Revision: 2006 November2007 350Z
Actuator Relay SystemNFS0004L
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 VDC relay box connector E47, E48, E222 and VDC/TCS/ABS control unit connector B114 and
check terminals for deformation, disconnection, looseness, and so on. If there is an error, repair or replace
the terminal.
2. Securely reconnect the connectors and then preform 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 ACTUATOR RELAY POWER SYSTEM
1. Turn ignition switch OFF and disconnect VDC relay box connec-
tor E48.
2. Check voltage between VDC relay box connector and ground.
OK or NG
OK >> GO TO 4.
NG >> The circuit between battery and VDC relay box harness
connector E48 terminal 9 is open or shorted. Repair the
circuit.
4. CHECK ACTUATOR RELAY HARNESS
1. Disconnect VDC/TCS/ABS control unit connector B114.
2. Check continuity between VDC/TCS/ABS control unit connector
and VDC relay box connector E47.
OK or NG
OK >> GO TO 5.
NG >> Open or short in harness. Repair or replace the harness.
5. CHECK ACTUATOR RELAY
Independently check VDC actuator relay. Refer to BRC-123, "
ABS MOTOR RELAY AND ACTUATOR RELAY"
.
OK or NG
OK >> Replace VDC actuator assembly.
NG >> Replace VDC relay box.
Self-diagnosis results
MAIN RELAY
VDC relay box Ground Voltage
9 — Battery voltage (Approx. 12 V)
SFIA1894E
VDC/TCS/ABS control unit VDC relay box Continuity
25
Ye s
36 7
SFIA1895E

TROUBLE DIAGNOSIS FOR SYSTEM
BRC-119
[VDC/TCS/ABS]
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BRC
Revision: 2006 November2007 350Z
Stop Lamp Switch SystemNFS0004M
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 stop lamp switch connector and VDC/TCS/ABS control unit connector and check the termi-
nals for deformation, disconnection, looseness, and so on. If there is an error, repair or replace the termi-
nal.
2. Securely reconnect the connectors.
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

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]