2009 INFINITI QX56 steering

BRC-20
< FUNCTION DIAGNOSIS >[VDC/TCS/ABS]
ABS
Component Description
INFOID:0000000003772495
1. Front wheel sensor LH E18
RH E117 2. ABS actuator and electric unit (con-
trol unit) E125 3. Combination meter M23, M24
4. Rear wheel sensor LH C11
RH C10 5. Yaw rate/side/decel G sensor M108 6. Steering angle sensor M17
7. VDC OFF switch M253 8. Active booster E499. Delta stroke sensor E114
10. Brake fluid level switch E21 11. Front pressure sensor E31 12. Rear pressure sensor E32
Component parts Reference
ABS actuator and electric unit (control unit) Pump
BRC-38, "
Description"Motor
Actuator relayBRC-56, "
Description"
Solenoid valveBRC-48, "Description"
Wheel sensor BRC-29, "Description"
ABS warning lampBRC-83, "Description"
Brake warning lampBRC-84, "Description"
Revision: December 20092009 QX56

EBD
BRC-23
< FUNCTION DIAGNOSIS > [VDC/TCS/ABS]
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Component DescriptionINFOID:0000000003772499
1. Front wheel sensor LH E18
RH E117 2. ABS actuator and electric unit (con-
trol unit) E125 3. Combination meter M23, M24
4. Rear wheel sensor LH C11
RH C10 5. Yaw rate/side/decel G sensor M108 6. Steering angle sensor M17
7. VDC OFF switch M253 8. Active booster E499. Delta stroke sensor E114
10. Brake fluid level switch E21 11. Front pressure sensor E31 12. Rear pressure sensor E32
Component parts Reference
ABS actuator and electric unit (control unit)Pump
BRC-38, "
Description"Motor
Actuator relayBRC-56, "
Description"
Solenoid valveBRC-48, "Description"
Wheel sensor BRC-29, "Description"
ABS warning lampBRC-83, "Description"
Brake warning lampBRC-84, "Description"
Revision: December 20092009 QX56

DIAGNOSIS SYSTEM [ABS ACTUATOR AND ELECTRIC UNIT (CONTROL
UNIT)]
BRC-25
< FUNCTION DIAGNOSIS > [VDC/TCS/ABS]
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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.
N POSI SIG
(ON/OFF) ––
×Shift position (ON/OFF) judged by
transmission range switch signal.
P POSI SIG
(ON/OFF) ––
×Shift position (ON/OFF) judged by
transmission range switch signal.
ACCEL POS SIG
(%) ×
– ×Throttle valve open/close status
judged by CAN communication sig-
nal is displayed.
ENGINE SPEED
(rpm) ×××
Engine speed judged by CAN com-
munication signal is displayed.
STR ANGLE SIG
(deg) ×
– ×Steering angle detected by steering
angle sensor is displayed.
YAW RATE SEN
(d/s) ××× Yaw rate detected by yaw rate sen-
sor is displayed.
SIDE G-SENSOR
(m/s
2) ×
– ×Transverse acceleration detected
by side G-sensor is displayed.
STOP LAMP SW
(ON/OFF) ××× Stop lamp switch (ON/OFF) status
is displayed.
OFF SW
(ON/OFF) ×××
VDC OFF 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) sta-
tus 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.
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 dis-
played.
MOTOR RELAY
(ON/OFF) –
×× ABS motor relay signal (ON/OFF)
status is displayed.
ACTUATOR RLY
(ON/OFF) –
×× ABS actuator relay signal (ON/OFF)
status is displayed.
Item
(Unit) Data monitor item selection
Remarks
ECU INPUT
SIGNALS MAIN
SIGNALS SELE
C
TION
FROM MENU
Revision: December 20092009 QX56

C1101, C1102, C1103, C1104 WHEEL SENSOR-1
BRC-31
< COMPONENT DIAGNOSIS > [VDC/TCS/ABS]
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Component InspectionINFOID:0000000003772504
1.CHECK DATA MONITOR
On “DATA MONITOR”, select “FR LH SENSOR”, “FR RH SENSOR”, “RR LH SENSOR”, and “RR RH SEN-
SOR”, and check the vehicle speed.
Is the inspection result normal?
YES >> Inspection End
NO >> Go to diagnosis procedure. Refer to BRC-29, "
Diagnosis Procedure".
Special Repair RequirementINFOID:0000000003772505
1.ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION
Always perform neutral position adjustment for the st eering angle sensor when replacing the ABS actuator
and electric unit (control unit). Refer to BRC-8, "
ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL
POSITION : Description".
>> GO TO 2
2.CALIBRATION OF DECEL G SENSOR
Always perform calibration of decel G sensor when replacing the ABS actuator and electric unit (control unit).
Refer to BRC-9, "
CALIBRATION OF DECEL G SENSOR : Description".
>> END
Wheel sensor Vehicle speed (DATA MONITOR)
FR LH SENSOR
Nearly matches the speedometer dis-
play (±10% or less)
FR RH SENSOR
RR LH SENSOR
RR RH SENSOR
Revision: December 20092009 QX56

BRC-34
< COMPONENT DIAGNOSIS >[VDC/TCS/ABS]
C1105, C1106, C1107,
C1108 WHEEL SENSOR-2
Is the inspection result normal?
YES >> Replace the ABS actuator and electric unit (control unit). Refer to BRC-116, "Removal and Instal-
lation".
NO >> Repair the circuit.
Component InspectionINFOID:0000000003772509
1.CHECK DATA MONITOR
On “DATA MONITOR”, select “FR LH SENSOR”, “FR RH SENSOR”, “RR LH SENSOR”, and “RR RH SEN-
SOR”, and check the vehicle speed.
Is the inspection result normal?
YES >> Inspection End
NO >> Go to diagnosis procedure. Refer to BRC-32, "
Diagnosis Procedure".
Special Repair RequirementINFOID:0000000003772510
1.ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION
Always perform neutral position adjustment for the st eering angle sensor when replacing the ABS actuator
and electric unit (control unit). Refer to BRC-8, "
ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL
POSITION : Description".
>> GO TO 2
2.CALIBRATION OF DECEL G SENSOR
Always perform calibration of decel G sensor when replac ing the ABS actuator and electric unit (control unit).
Refer to BRC-9, "
CALIBRATION OF DECEL G SENSOR : Description".
>> END
Wheel sensor ABS actuator and
electric unit (control unit) Wheel sensor
Continuity
Connector Terminal Connector Terminal
Front LH
E12545
E18 1
Ye s
46
2
Front RH 34
E117 1
33 2
Rear LH 37
C11 2
36 1
Rear RH 42
C10 2
43 1
Wheel sensorVehicle speed (DATA MONITOR)
FR LH SENSOR
Nearly matches the speedometer dis-
play (±10% or less)
FR RH SENSOR
RR LH SENSOR
RR RH SENSOR
Revision: December 20092009 QX56

BRC-36
< COMPONENT DIAGNOSIS >[VDC/TCS/ABS]
C1109 POWER AND GROUND SYSTEM
5. Check continuity between ABS actuator and electric unit (control
unit) harness connector terminals and ground.
Is the inspection result normal?
YES >> Check battery for terminal looseness, low voltage, etc. If any malfunction is found, repair malfunc-
tioning parts.
NO >> Repair or replace malfunctioning components.
Special Repair RequirementINFOID:0000000003772514
1.ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION
Always perform neutral position adjustment for the st eering angle sensor when replacing the ABS actuator
and electric unit (control unit). Refer to BRC-8, "
ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL
POSITION : Description".
>> GO TO 2
2.CALIBRATION OF DECEL G SENSOR
Always perform calibration of decel G sensor when replac ing the ABS actuator and electric unit (control unit).
Refer to BRC-9, "
CALIBRATION OF DECEL G SENSOR : Description".
>> END
ABS actuator and electric unit (control unit) —Contin u it y
Connector Terminal
E125 16, 47 Ground Yes
AWFIA0016ZZ
Revision: December 20092009 QX56

C1110, C1170 ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)BRC-37
< COMPONENT DIAGNOSIS > [VDC/TCS/ABS]
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C1110, C1170 ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)
DTC LogicINFOID:0000000003772515
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.CHECK SELF-DIAGNOSIS RESULTS
Check the self-diagnosis results.
Is above displayed on the self-diagnosis display?
YES >> Proceed to diagnosis procedure. Refer to BRC-37, "Diagnosis Procedure".
NO >> Inspection End
Diagnosis ProcedureINFOID:0000000003772516
INSPECTION PROCEDURE
1.REPLACE ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)
>> Replace ABS actuator and electric unit (control unit). Refer to BRC-116, "
Removal and Installa-
tion".
Special Repair RequirementINFOID:0000000003772517
1.ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION
Always perform neutral position adjustment for the st eering angle sensor when replacing the ABS actuator
and electric unit (control unit). Refer to BRC-8, "
ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL
POSITION : Description".
>> GO TO 2
2.CALIBRATION OF DECEL G SENSOR
Always perform calibration of decel G sensor when replacing the ABS actuator and electric unit (control unit).
Refer to BRC-9, "
CALIBRATION OF DECEL G SENSOR : Description".
>> END
DTC Display item Malfunction detected condition Possible cause
C1110 CONTROLLER FAILURE When there is an in
ternal malfunction in the ABS actuator
and electric unit (control unit). • ABS actuator and electric unit
(control unit)
C1170 VARIANT CODING In a case where VARIANT CODING is different.
Self-diagnosis results
CONTROLLER FAILURE VARIANT CODING
Revision: December 20092009 QX56

C1111 ABS MOTOR, MOTOR RELAY SYSTEM
BRC-39
< COMPONENT DIAGNOSIS > [VDC/TCS/ABS]
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1. Turn ignition switch OFF.
2. Disconnect ABS actuator and electric unit (control unit) connec- tor.
3. Check voltage between the ABS actuator and electric unit (con- trol unit) harness connector terminal and ground.
Is the inspection result normal?
YES >> GO TO 3
NO >> Repair or replace malfunctioning components.
3.CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) GROUND CIRCUIT
Check continuity between ABS act uator and electric unit (control
unit) harness connector terminals and ground.
Is the inspection result normal?
YES >> Replace ABS actuator and electric unit (control unit). Refer to BRC-116, "
Removal and Installation".
NO >> Repair or replace malfunctioning components.
Component InspectionINFOID:0000000003772521
1.CHECK ACTIVE TEST
1. On “ACTIVE TEST”, select “ABS MOTOR”.
2. Touch ON and OFF on screen. Make sure motor relay and actuator relay operates as shown in table below.
Is the inspection result normal?
YES >> Inspection End
NO >> Go to diagnosis procedure. Refer to BRC-38, "
Diagnosis Procedure".
Special Repair RequirementINFOID:0000000003772522
1.ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION
Always perform neutral position adjustment for the st eering angle sensor when replacing the ABS actuator
and electric unit (control unit). Refer to BRC-8, "
ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL
POSITION : Description".
>> GO TO 2
2.CALIBRATION OF DECEL G SENSOR
Always perform calibration of decel G sensor when replacing the ABS actuator and electric unit (control unit).
Refer to BRC-9, "
CALIBRATION OF DECEL G SENSOR : Description".
>> END
ABS actuator and electric unit (control unit) —Volt a ge
Connector Terminal
E125 1Ground Battery voltage
AWFIA0017ZZ
ABS actuator and electric unit (control unit)
—Contin u it y
Connector Terminal
E125 16, 47GroundYes
AWFIA0016ZZ
Operation ONOFF
MOTOR RELAY ONOFF
ACTUATOR RLY ONON
Revision: December 20092009 QX56