ECU INFINITI FX35 2008 Service Manual

TROUBLE DIAGNOSISBRC-29
< SERVICE INFORMATION > [VDC/TCS/ABS]
C
D
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G H
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K L
M A
B
BRC
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O P
× : Applicable : Optional item
Item
(Unit) Data monitor item selection
Remarks
ECU INPUT
SIGNALS MAIN
SIGNALS
GEAR ××Gear position judged by PNP switch signal is displayed.
SLCT LVR POSI ××Shift position judged by PNP switch signal.
FR RH SENSOR
[km/h (MPH)] ××
Wheel speed calculated by front RH wheel sensor signal is displayed.
FR LH SENSOR
[km/h (MPH)] ××
Wheel speed calculated by front LH wheel sensor signal is displayed.
RR RH SENSOR
[km/h (MPH)] ××
Wheel speed calculated by rear RH wheel sensor signal is displayed.
RR LH SENSOR
[km/h (MPH)] ××
Wheel speed calculated by rear LH wheel sensor signal is displayed.
BATTERY VOLT
(V) ××Voltage supplied to ABS actuator and electric unit (control unit) is dis-
played.
ENGINE SPEED
(rpm) ××
Engine speed judged by CAN communication signal is displayed.
DECEL G-SEN
(G) (AWD models) ××
Longitudinal acceleration detected by decel G sensor is displayed.
OFF SW
(ON/OFF)
×× VDC OFF switch (ON/OFF) status is displayed.
STOP LAMP SW
(ON/OFF) ××
Stop lamp switch (ON/OFF) status is displayed.
YAW RATE SEN
(d/s) ××
Yaw rate detected by yaw rate sensor is displayed.
ACCEL POS SIG
(%) ×Throttle valve open/close status judged by CAN communication signal
is displayed.
STR ANGLE SIG
(deg) ×
Steering angle detected by steering angle sensor is displayed.
SIDE G-SENSOR
(m/s
2) ×
Lateral acceleration detected by side G sensor is displayed.
PRESS SENSOR
(bar) ×
Brake fluid pressure detected by pressure sensor is displayed.
FLUID LEV SW
(ON/OFF) ×
Brake fluid level switch (ON/OFF) status is displayed.
ABS WARN LAMP
(ON/OFF) ×
ABS warning lamp (ON/OFF) status is displayed.
SLIP LAMP
(ON/OFF) ×
SLIP indicator lamp (ON/OFF) status is displayed.
FR LH IN SOL
(ON/OFF) ×
Front LH IN ABS solenoid (ON/ OFF) status is displayed.
FR LH OUT SOL
(ON/OFF) ×
Front LH OUT ABS solenoid (ON/OFF) status is displayed.
RR RH IN SOL
(ON/OFF) ×
Rear RH IN ABS solenoid (ON/OFF) status is displayed.
RR RH OUT SOL
(ON/OFF) ×
Rear RH OUT ABS solenoid (ON/ OFF) status is displayed.
FR RH IN SOL
(ON/OFF) ×
Front RH IN ABS solenoid (ON/OFF) status is displayed.
FR RH OUT SOL
(ON/OFF) ×
Front RH OUT ABS solenoid (ON/OFF) status is displayed.
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BRC-30
< SERVICE INFORMATION >[VDC/TCS/ABS]
TROUBLE DIAGNOSIS
Note: Serves as
EBD warning lamp.
Active TestINFOID:0000000001327674
CAUTION:
 Do not perform active test while driving vehicle.
 Make sure to completely bleed air from the brake system.
 Active test can not be performed when EBD, ABS, TCS or VDC operation is malfunction.
 ABS and brake warning lamps tu rn on during the active test.
NOTE:
RR LH IN SOL
(ON/OFF) ×
Rear LH IN ABS solenoid (ON/ OFF) status is displayed.
RR LH OUT SOL
(ON/OFF) ×
Rear LH OUT ABS solenoid (ON/OFF) status is displayed.
OFF LAMP
(ON/OFF) ×
OFF Lamp (ON/OFF) status is displayed.
MOTOR RELAY
(ON/OFF) ×
ABS motor relay signal (ON/OFF) status is displayed.
ACTUATOR RLY
(ON/OFF) ×
ABS actuator relay signal (O N/OFF) status is displayed.
CV1
(ON/OFF) Primary side switch-over solenoid valve 1 (cut valve 1) (ON/OFF) status
is displayed.
CV2
(ON/OFF) Secondary side switch-over solenoid valve 2 (cut-valve 2) (ON/OFF)
status is displayed.
SV1
(ON/OFF) Primary side switch-over solenoid valve 1 (suction valve 1) (ON/OFF)
status is displayed.
SV2
(ON/OFF) Secondary side switch-over solenoid valve 2 (suction valve 2) (ON/
OFF) status is displayed.
VDC FAIL SIG
(ON/OFF) VDC fail signal (ON/OFF) status is displayed.
TCS FAIL SIG
(ON/OFF) TCS fail signal (ON/OFF) status is displayed.
ABS FAIL SIG
(ON/OFF) ABS fail signal (ON/OFF) status is displayed.
EBD FAIL SIG
(ON/OFF) EBD fail signal (ON/OFF) status is displayed.
EBD SIGNAL
(ON/OFF) EBD operation (ON/OFF) status is displayed.
ABS SIGNAL
(ON/OFF) ABS operation (ON/OFF) status is displayed.
TCS SIGNAL
(ON/OFF) TCS operation (ON/OFF) status is displayed.
VDC SIGNAL
(ON/OFF) VDC operation (ON/OFF) status is displayed.
EBD WARN LAMP
(ON/OFF) Brake warning lamp (ON/OFF) status is displayed. (Note)
CRANKING SIG
(ON/OFF) Cranking condition (ON/OFF) status is displayed.
4WD FAIL REQ
(ON/OFF) AWD fail-safe signal (ON/OFF) status is displayed.
2WD/4WD
(2WD/4WD) Distinguish 2WD and AWD
Item
(Unit) Data monitor item selection
Remarks
ECU INPUT
SIGNALS MAIN
SIGNALS
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BRC-36
< SERVICE INFORMATION >[VDC/TCS/ABS]
TROUBLE DIAGNOSIS FOR SYSTEM
DTC C1105 RR RH SENSOR-2
INFOID:0000000001569694
Refer to BRC-34, "DTC C1101 RR RH SENSOR-1".
DTC C1106 RR LH SENSOR-2INFOID:0000000001569695
Refer to BRC-34, "DTC C1101 RR RH SENSOR-1".
DTC C1107 FR RH SENSOR-2INFOID:0000000001569696
Refer to BRC-34, "DTC C1101 RR RH SENSOR-1".
DTC C1108 FR LH SENSOR-2INFOID:0000000001569697
Refer to BRC-34, "DTC C1101 RR RH SENSOR-1".
DTC C1109 BATTERY VOLTAGE [ABNORMAL]INFOID:0000000001327685
INSPECTION PROCEDURE
1.CHECK SELF-DIAGNOSTIC RESULTS (1)
Check the self-diagnostic results.
Does
“BATTERY VOLTAGE” appear in self-diagnostic results display?
YES >> GO TO 2.
NO >> INSPECTION END
2.CHECK SELF-DIAGNOSTIC RESULTS (2)
1. Disconnect ABS actuator and electric unit (contro l unit) connector. Then reconnect it securely.
2. Perform self-diagnosis.
Do any self-diagnosis item appear?
YES >> GO TO 3.
NO >> Poor connection. Repair or replace connector.
3.CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) POWER SUPPLY CIRCUIT (1)
1. Disconnect ABS actuator and electric unit (control unit) connector E56.
2. Turn ignition switch OFF. Check voltage between ABS actuator and electric unit (control unit) harness connector and ground.
3. Turn ignition switch ON (but do not start engine). Check voltage between ABS actuator and electr ic unit (control unit) harness
connector and ground.
OK or NG
OK >> GO TO 4.
NG >> GO TO 5.
4.CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) GROUND CIRCUIT
Self-diagnostic results
BATTERY VOLTAGE [ABNORMAL]
ABS actuator and electric unit (control unit) Ground Voltage
32 — Battery voltage
(Approx. 12 V)
ABS actuator and electric unit (control unit) Ground Voltage 4— Battery voltage
(Approx. 12 V)
SFIA1200E
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BRC-38
< SERVICE INFORMATION >[VDC/TCS/ABS]
TROUBLE DIAGNOSIS FOR SYSTEM
1. Disconnect ABS actuator and electric unit (contro
l unit) connector. Then reconnect it securely.
2. Perform self-diagnosis again.
Do any self-diagnosis item appear?
YES >> GO TO 3.
NO >> Poor connection. Repair or replace the applicable connector.
3.CHECK ABS MOTOR AND MOTOR RELAY POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF and disconnect ABS actuat or and electric unit (control unit) connector E56.
2. Check voltage between ABS actuator and electric unit (control unit) harness connector and ground.
3. Check continuity between ABS ac tuator and electric unit (control
unit) harness connector and ground.
OK or NG
OK >> Perform self-diagnosis again. If the same result appears, replace ABS actuator and electric unit (control
unit). Refer to BRC-54
.
NG >> Repair harness or connectors.
DTC C1113 G-SENSORINFOID:0000000001327682
CAUTION:
Sudden turns (such as spin turns, acceleration turns), drifting, etc. may cause the G sensor circuit
indicate a malfunction. However, this is not a malf unction, if normal operation can be resumed after
restarting engine.
INSPECTION PROCEDURE
1.CHECK SELF-DIAGNOSTIC RESULTS
Check the self-diagnostic results.
CAUTION:
When on a turntable, such as at a parking structure entrance, or wh en on a moving object with engine
running, VDC OFF indicator lamp might turn on and self-diagnosis using CONSULT-III the yaw rate
sensor system might be displayed, but in this case ther e is no malfunction in yaw rate sensor circuit.
As soon as vehicle leaves turntable or moving object , restart engine to return the system to normal.
Is the above displayed in the self-diagnosis display items?
YES >> GO TO 2.
NO >> INSPECTION END
2.CHECK CONNECTOR
ABS actuator and electric unit (control unit) Ground Voltage
1, 32 — Battery voltage
(Approx. 12 V)
SFIA1198E
ABS actuator and electric unit (control unit) Ground Continuity
16, 47 — Yes
SFIA1197E
Self-diagnostic resultsYAW RATE SENSOR
SIDE G-SEN CIRCUIT
G-SENSOR (AWD models)
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BRC-40
< SERVICE INFORMATION >[VDC/TCS/ABS]
TROUBLE DIAGNOSIS FOR SYSTEM
YES >> GO TO 2.
NO >> INSPECTION END
2.CHECK CONNECTOR
1. Disconnect stop lamp switch connector and ABS actuat or and electric unit (control unit) connector E56
and check terminals for deformation, disconnection, looseness, and so on. If any malfunction is found,
repair or replace terminal.
2. Securely reconnect connectors.
3. Perform self-diagnosis again.
OK or NG
OK >> Connector terminal contact is loose, damaged, open or shorted.
NG >> GO TO 3.
3.CHECK STOP LAMP SWITCH
1. Turn ignition switch OFF and disconnect stop lamp switch har- ness connector.
2. Operate stop lamp switch and check continuity between stop
lamp switch harness connector terminals.
OK or NG
OK >> GO TO 4.
NG >> Replace stop lamp switch. Refer to BR-6, "
Component".
4.CHECK STOP LAMP SWITCH CIRCUIT
1. Turn ignition switch OFF and disconnect stop lamp switch con- nector E210 and ABS actuator and electric unit (control unit)
connector E56.
2. Check continuity between stop lamp switch harness connector and ABS actuator and electric unit (control unit) harness con-
nector.
OK or NG
OK >> Connect connectors and perform an ABS actuator and electric unit (control unit) self-diagnosis.
NG >> Open or short in harness between stop lamp s witch and ABS actuator and electric unit (control
unit). Repair or replace applied harness.
DTC C1120 FR LH IN ABS SOLINFOID:0000000001327683
INSPECTION PROCEDURE
1.CHECK SELF-DIAGNOSTIC RESULTS
Check the self-diagnostic results.
Terminal Condition Continuity
1 − 2 Release stop lamp switch
(When brake pedal is depressed.)
Ye s
Push stop lamp switch
(When brake pedal is released.) No
SFIA3392E
ABS actuator and electric unit (contr
ol unit) Stop lamp switch Continuity
41 2 Yes
SFIA1436E
Self-diagnostic results FR LH IN ABS SOL
FR LH OUT ABS SOL RR RH IN ABS SOL
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TROUBLE DIAGNOSIS FOR SYSTEMBRC-41
< SERVICE INFORMATION > [VDC/TCS/ABS]
C
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G H
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K L
M A
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BRC
N
O P
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 terminals for deformation, dis-
connection, looseness, and so on. If any malfunc tion is found, repair or replace terminal.
2. Securely reconnect connector and perform self-diagnosis.
OK or NG
OK >> Connector terminal contact is loose, damaged, open or shorted.
NG >> GO TO 3.
3.CHECK SOLENOID POWE R AND GROUND CIRCUIT
1. Turn ignition switch OFF and disconnect ABS actuat or and electric unit (control unit) connector E56.
2. Check voltage between ABS actuator and electric unit (control unit) harness connector and ground.
3. Check continuity between ABS ac tuator and electric unit (control
unit) harness connector and ground.
OK or NG
OK >> Perform self-diagnosis again. If the same results appear, replace ABS actuator and electric unit (control
unit). Refer to BRC-54
.
NG >> Repair or replace harness or connectors.
DTC C1121 FR LH OUT ABS SOLINFOID:0000000001569703
Refer to BRC-40, "DTC C1120 FR LH IN ABS SOL".
DTC C1122 FR RH IN ABS SOLINFOID:0000000001569706
Refer to BRC-40, "DTC C1120 FR LH IN ABS SOL".
RR RH OUT ABS SOL
FR RH IN ABS SOL
FR RH OUT ABS SOL RR LH IN ABS SOL
RR LH OUT ABS SOL CV 1
CV 2SV 1
SV 2
Self-diagnostic results
ABS actuator and electric unit
(control unit) Ground Voltage
32 — Battery voltage
(Approx. 12 V)
SFIA1196E
ABS actuator and electric unit (control unit) Ground Continuity
16, 47 — Yes
SFIA1197E
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BRC-46
< SERVICE INFORMATION >[VDC/TCS/ABS]
TROUBLE DIAGNOSIS FOR SYSTEM
Does anything besides “ST ANG SEN SIGNAL” appear on self-diagnostic results display?
YES >> Inspect and repair the indicated
items. Then perform self-diagnosis again.
NO >> Perform adjustment of steering angle sensor neutral position. Then GO TO 2.
2.CHECK SELF DIAGNOSIS RESULTS (2)
Turn ignition switch OFF and ON to erase self-diagnos tic results, and perform ABS actuator and electric unit
(control unit) self-diagnosis again.
Does anything appear on self-diagnostic results display?
YES >> Replace steering angle sensor. Then perform adj ustment of neutral position and perform self-
diagnosis again.
NO >> INSPECTION END
DTC C1145 YAW RATE SENSORINFOID:0000000001569717
Refer to BRC-38, "DTC C1113 G-SENSOR".
DTC C1146 SIDE G-SEN CIRCUITINFOID:0000000001569718
Refer to BRC-38, "DTC C1113 G-SENSOR".
DTC C1155 BR FLUID LEVEL LOWINFOID:0000000001327687
INSPECTION PROCEDURE
1.CHECK SELF-DIAGNOSTIC RESULTS
1. Check fluid level in brake fluid reservoir tank. If the level is low, add brake fluid.
2. Clear the stored self-diagnostic results and check self-diagnostic results.
Is the above displayed in the self-diagnosis display item?
YES >> GO TO 2.
NO >> INSPECTION END
2.CHECK CONNECTOR
1. Disconnect brake fluid level switch connector and ABS actuator and electric unit (control unit) connector
and check terminal for deformation, disconnection, l ooseness, and so on. If any malfunction is found,
repair or replace terminal.
2. Securely reconnect connectors and perform self-diagnosis again.
OK or NG
OK >> Connector terminal contact is loose, damaged, open or shorted.
NG >> GO TO 3.
3.CHECK HARNESS BETWEEN BRAKE FLUID LEVE L SWITCH AND ABS ACTUATOR AND ELECTRIC
UNIT (CONTROL UNIT)
Self-diagnostic results
ST ANG SEN SIGNAL
Self-diagnostic results
BR FLUID LEVEL LOW
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TROUBLE DIAGNOSIS FOR SYMPTOMSBRC-51
< SERVICE INFORMATION > [VDC/TCS/ABS]
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M A
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BRC
N
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4.CHECK A/T SELF-DIAGNOSTIC RESULTS
Perform A/T self-diagnosis.
OK or NG
OK >> GO TO 5.
NG >> Check the corresponding items. Refer to AT- 4 1
in “A/T”.
5.CHECK SELF-DIAGNOSTIC RESULTS 1
Perform self-diagnosis of ABS actuator and electric unit (control unit).
Are self-diagnosis items displayed?
YES >> Check the corresponding items, make repairs, and perform ABS actuator and electric unit (control
unit) self-diagnosis again.
NO >> GO TO 6.
6.CHECK CONNECTOR
1. Disconnect ABS actuator and electric unit (control unit) connector E56 and ECM connector, check termi-
nals for deformation, disconnection, looseness, and so on. If any malfunction is found, repair or replace
connector.
2. Securely reconnect connector and perform self-diagnosis.
OK or NG
OK >> If poor connect, damaged, open or short circuit is found, repair or replace connector terminal.
NG >> GO TO 7.
7.CHECK SELF-DIAGNOSTIC RESULTS 2
Re-perform ABS actuator and electric unit (control unit) self-diagnosis.
Are self-diagnosis items displayed?
YES >> Repair or replace malfunctioning items.
NO >> GO TO 8.
8.CHECK CIRCUIT BETWEEN ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) AND ECM
Check CAN communication circuit. Refer to BRC-48, "
DTC U1000 CAN COMM CIRCUIT".
OK or NG
OK >> INSPECTION END
NG >> Connect connectors, and perform ABS actuator and electric unit (control unit) self-diagnosis
again.
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BRC-52
< SERVICE INFORMATION >[VDC/TCS/ABS]
WHEEL SENSORS
WHEEL SENSORS
Removal and InstallationINFOID:0000000001327698
REMOVAL
1. Disconnect wheel sensor connector.
2. Remove wheel sensor mounting bolts, grommets (front sensor) and clip.
3. Remove wheel sensor.
CAUTION:
Be careful of the followin
g when installing sensor.
 As much as possible, avoid rotati ng sensor when removing it. Pull sensors out without pulling on
sensor harness.
 Take care to avoid damaging sensor edges or roto r teeth. Remove wheel sensor first before remov-
ing front wheel hub and bearing assembly and rear fina l drive. This is to avoid damage to sensor wir-
ing and loss of sensor function.
INSTALLATION
Note the following, and install in the reverse order of removal.
CAUTION:
Be careful of the follow ing when installing sensor. Tighten in stallation bolts to specified torques.
 When installing, make sure there is no foreign material such as iron chips on pick-up and mounting
hole of sensor. Make sure no foreign material h as been caught in the sensor rotor. Remove any for-
eign material and clean the mount.
 When installing front sensor, be sure to press rubber grommets in until they lock at the three loca-
tions shown in the figure (2 at shock absorbers and 1 at body pa nel). When installed, harness must
not be twisted. White line on ha rness must be visible from front.
 When installing rear sensor, attach harness at rear suspension member securely. Besides, harness
must not be twisted when installed.
PFIA0600E
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BRC-54
< SERVICE INFORMATION >[VDC/TCS/ABS]
ACTUATOR AND ELECTRIC UNIT (ASSEMBLY)
ACTUATOR AND ELECTRIC UNIT (ASSEMBLY)
Removal and InstallationINFOID:0000000001327700
REMOVAL
1. Disconnect ABS actuator and electric unit (control unit) connector.
2. Loosen brake tube flare nuts, then remove brake tubes
from ABS actuator and electric unit (control unit).
3. Remove LH side fender protector. Refer to EI-24
.
4. Remove ABS actuator and electric unit (control unit) mounting nuts.
5. Remove ABS actuator and electric unit (control unit) from vehicle.
CAUTION:
Be careful of the following wh en removing ABS actuator and electric unit (control unit).
 If the part number on the part number label (p asted on actuator upper surface) is the same, ABS
actuator and electric unit (c ontrol unit) can not be used on another vehicle.
If it is used on another vehicle, ABS warning lamp, SLIP indicator lamp and VDC OFF indicator lamp
may turn ON or VDC/TCS/ABS may not operate normally.
When replacing ABS actuator an d electric unit (control unit), must use new service parts.
 Before servicing, disconnect battery cables.
 To remove brake tube, use a flare nut torque wrench to prevent flare nuts and brake tube from being
damaged. To install, use a flare nut torque wren ch (commercial service tool) and tighten to the spec-
ified torque.
 Do not apply excessive impact to actuator, such as dropping it.
 Do not remove and install ABS actuator and el ectric unit (control unit) by holding harness.
INSTALLATION
Note the following, and install in the reverse order of removal.
CAUTION:
Be careful of the following wh en installing ABS actuator and electric unit (control unit).
 Tighten the mounting bolts and nuts to the specified torque.
 After the work, bleed air from brake piping. Refer to BR-8, "
Bleeding Brake System".
 After installing vehicle harness connector in th e actuator, make sure connector is securely locked.
 When replacing ABS actuator and el ectric unit (control unit), calibrate steering angle sensor neutral
position and decel G sensor. Refer to BRC-8
.
PFIA0601E
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