2009 INFINITI QX56 steering wheel

BRC-8
< BASIC INSPECTION >[VDC/TCS/ABS]
INSPECTION AND ADJUSTMENT
INSPECTION AND ADJUSTMENT
ADDITIONAL SERVICE WHEN
REPLACING CONTROL UNIT
ADDITIONAL SERVICE WHEN REPL ACING CONTROL UNIT : Description
INFOID:0000000003772478
After replacing the ABS actuator and electric unit (control unit), perform the following procedures:
• Neutral position adjustment for the steering angle sensor
• Calibration of the decel G sensor
ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Special Repair Re-
quirement
INFOID:0000000003772479
1.PERFORM THE NEUTRAL POSITION ADJUST MENT FOR THE STEERING ANGLE SENSOR
Perform the neutral position adjustm ent for the steering angle sensor.
>> Refer to BRC-8, "
ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION : Spe-
cial Repair Requirement", GO TO 2
2.PERFORM CALIBRATION OF THE DECEL G SENSOR
Perform calibration of the decel G sensor.
>> Refer to BRC-9, "
CALIBRATION OF DECEL G SENSOR : Special Repair Requirement".
ADJUSTMENT OF STEERING ANGL E SENSOR NEUTRAL POSITION
ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION : Description
INFOID:0000000003772480
Refer to the table below to determine if adjustment of steering angle sensor neutral position is required.
×: Required –: Not required
ADJUSTMENT OF STEERING ANGLE SENS OR NEUTRAL POSITION : Special Re-
pair Requirement
INFOID:0000000003772481
ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION
CAUTION:
To adjust neutral position of steering angl e sensor, make sure to use CONSULT-III
(Adjustment cannot be done without CONSULT-III)
1.ALIGN THE VEHICLE STATUS
Stop vehicle with front wheels in straight-ahead position.
Situation Adjustment of steering angle sensor neutral position
Removing/Installing ABS actuator and electric unit (control unit) —
Replacing ABS actuator and electric unit (control unit) ×
Removing/Installing steering angle sensor ×
Replacing steering angle sensor ×
Removing/Installing steering components ×
Replacing steering components ×
Removing/Installing suspension components ×
Replacing suspension components ×
Change tires to new ones —
Tire rotation —
Adjusting wheel alignment ×
Battery disconnection ×
Revision: December 20092009 QX56

INSPECTION AND ADJUSTMENTBRC-9
< BASIC INSPECTION > [VDC/TCS/ABS]
C
D
E
G H
I
J
K L
M A
B
BRC
N
O P
>> GO TO 2
2.PERFORM THE NEUTRAL POSITION ADJUST MENT FOR THE STEERING ANGLE SENSOR
1. On the CONSULT-III screen, touch “WORK SUPP ORT” and “ST ANG SEN ADJUSTMENT” in order.
2. Touch “START”. CAUTION:
Do not touch steering wheel whil e adjusting steering angle sensor.
3. After approximately 10 seconds, touch “END”. NOTE:
After approximately 60 seconds, it ends automatically.
4. Turn ignition switch OFF, then turn it ON again. CAUTION:
Be sure to perform above operation.
>> GO TO 3
3.CHECK DATA MONITOR
1. Run vehicle with front wheels in straight-ahead position, then stop.
2. Select “DATA MONITOR”. Then make sure “STR ANGLE SIG” is within 0 ±2.5 °.
Is the steering angle within the specified range?
YES >> GO TO 4
NO >> Perform the neutral position adjustment fo r the steering angle sensor again, GO TO 1
4.ERASE THE SELF-DIAGNOSIS MEMORY
Erase the self-diagnosis memory of the ABS ac tuator and electric unit (control unit) and ECM.
• ABS actuator and electric unit (control unit): Refer to BRC-24, "
CONSULT-III Function (ABS)".
• ECM: Refer to EC-63, "
CONSULT-III Function (ENGINE)".
Are the memories erased?
YES >> Inspection End
NO >> Check the items indica ted by the self-diagnosis.
CALIBRATION OF DECEL G SENSOR
CALIBRATION OF DECEL G SENSOR : DescriptionINFOID:0000000003772482
Refer to the table below to determine if calibration of the decel G sensor is required.
×: Required –: Not required
CALIBRATION OF DECEL G SENSOR : Special Repair RequirementINFOID:0000000003772483
CALIBRATION OF DECEL G SENSOR
CAUTION:
To calibrate the decel G sensor, make sure to use CONSULT-III
Situation Calibration of decel G sensor
Removing/Insta lling ABS actuator and electr ic unit (control unit) —
Replacing ABS actuator and elec tric unit (control unit) ×
Removing/Installing steering angle sensor ×
Replacing steering angle sensor ×
Removing/Installing steering components ×
Replacing steering components ×
Removing/Installing suspension components ×
Replacing suspension components ×
Change tires to new ones —
Tire rotation —
Adjusting wheel alignment ×
Revision: December 20092009 QX56

BRC-12
< FUNCTION DIAGNOSIS >[VDC/TCS/ABS]
VDC
Hydraulic Circuit Diagram
INFOID:0000000005874974
System DescriptionINFOID:0000000003772485
• Vehicle Dynamics Control system detects driver ′s steering operation amount and brake pedal travel from
steering angle sensor and pressure sensors. Using information from yaw rate/side/decel G sensor and
wheel sensor, VDC judges driving condition (conditions of under steer and over steer) to improve vehicle
driving stability by controlling brake application to 4 wheels and engine output.
• During VDC operation, it inform s driver of system operation by flashing SLIP indicator lamp.
• Electrical system diagnosis by CONSULT-III is available.
WFIA0187E
Revision: December 20092009 QX56

BRC-14
< FUNCTION DIAGNOSIS >[VDC/TCS/ABS]
VDC
Component Description
INFOID:0000000003772487
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"
VDC switch-over valve
(CV1, CV2, SV1, SV2)BRC-70, "Description"
Wheel sensor
BRC-29, "Description"
Yaw rate/side/decel G sensorBRC-40, "Description"
Steering angle sensorBRC-61, "Description"
VDC OFF switchBRC-81, "Description"
ABS warning lampBRC-83, "Description"
Brake warning lampBRC-84, "Description"
VDC OFF indicator lampBRC-85, "Description"
SLIP indicator lampBRC-86, "Description"
Front pressure sensor
BRC-58, "Description"Rear pressure sensor
Active boosterBRC-73, "
Description"
Delta stroke sensorBRC-76, "Description"
Revision: December 20092009 QX56

TCS
BRC-17
< FUNCTION DIAGNOSIS > [VDC/TCS/ABS]
C
D
E
G H
I
J
K L
M A
B
BRC
N
O P
Component DescriptionINFOID:0000000003772491
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"
VDC switch-over valve
(CV1, CV2, SV1, SV2)BRC-70, "Description"
Wheel sensor
BRC-29, "Description"
Yaw rate/side/decel G sensorBRC-40, "Description"
Steering angle sensorBRC-61, "Description"
VDC OFF switchBRC-81, "Description"
ABS warning lampBRC-83, "Description"
Brake warning lampBRC-84, "Description"
VDC OFF indicator lampBRC-85, "Description"
SLIP indicator lampBRC-86, "Description"
Front pressure sensor
BRC-58, "Description"Rear pressure sensor
Active boosterBRC-73, "
Description"
Delta stroke sensorBRC-76, "Description"
Revision: December 20092009 QX56

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]
C
D
E
G H
I
J
K L
M A
B
BRC
N
O P
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]
C
D
E
G H
I
J
K L
M A
B
BRC
N
O P
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