2010 INFINITI QX56 relay

BRC-26
< FUNCTION DIAGNOSIS >[VDC/TCS/ABS]
DIAGNOSIS SYSTEM [
ABS ACTUATOR AND ELECTRIC UNIT (CONTROL
UNIT)]
×: Applicable
–: Not applicable
ACTIVE TEST MODE
CAUTION:
• Do not perform active test while driving vehicle.
• Make sure to completely bleed air from brake system.
• The active test cannot be performed with the ABS warning lamp, VDC OFF indicator lamp, SLIP indi-
cator lamp or brake warning lamp on.
• ABS warning lamp, VDC OFF indicator lamp, SLIP indicator lamp and brake warning lamp are on
during active test.
NOTE:
• When active test is performed while depressing the pedal, the pedal depression amount will change. This is
normal. (Only solenoid valve and ABS motor.)
• “TEST IS STOPPED” is displayed 10 seconds after operation start.
• After “TEST IS STOPPED” is display ed, to perform test again, touch BACK.
Test Item
SOLENOID VALVE• When performing an active test of the ABS function, select the “MAIN SIGNAL S” for each test item.
• For ABS solenoid valve, touch “Up”, “Keep”, and “D own” on the display screen. For ABS solenoid valve
(ACT), touch “Up”, “ACT UP”, “ACT KEEP” and confirm that solenoid valves operate as shown in the table
below.
RELEASE SW NC
(On/Off) ––
×Release switch signal (On/Off) status is displayed.
“Off” indicates that the brake pedal is depressed. “On”
indicates that the brake pedal is released.
OHB FAIL
(On/Off) ––
×OHB fail status is displayed.
HBA FAIL
(On/Off) ––
×HBA fail status is displayed.
OHB SIG
(On/Off) ––
×OHB operation (On/Off) status is displayed.
HBA SIG
(On/Off) ––
×HBA operation (On/Off) status is displayed.
STP OFF RLY
(On/Off) ––
×Stop lamp relay signal (On/Off) status is displayed.
Item
(Unit) Data monitor item selection
Remarks
ECU INPUT
SIGNALS MAIN
SIGNALS SELECTION
FROM MENU
Operation ABS solenoid valve ABS solenoid valve (ACT)
Up Keep Down Up ACT UP ACT KEEP
FR RH SOL FR RH IN SOL Off On On — —
—
FR RH OUT SOL Off Off On* — — —
FR LH SOL FR LH IN SOL Off On On — —
—
FR LH OUT SOL Off Off On* — — —
RR RH SOL RR RH IN SOL Off On On — —
—
RR RH OUT SOL Off Off On* — — —
RR LH SOL RR LH IN SOL Off On On — —
—
RR LH OUT SOL Off Off On* — — —
FR RH ABS SOLENOID (ACT) FR RH IN SOL — — — Off Off Off
FR RH OUT SOL — — — Off Off Off
CV1 ———OffOnOn
SV1
— — — Off On* Off
Revision: April 20092010 QX56

DIAGNOSIS SYSTEM [ABS ACTUATOR AND ELECTRIC UNIT (CONTROL
UNIT)]
BRC-27
< FUNCTION DIAGNOSIS > [VDC/TCS/ABS]
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BRC
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O P*: On for 1 to 2 seconds after the touch, and then Off
ABS MOTOR
• Touch “On” and “Off” on screen. Make sure motor relay and actuator relay operates as shown in table below.
BOOSTER DRIVE• Touch “Up” and “Down” on the screen. Check that booster drive operates as shown in table below.
CAUTION:
Perform active test subject to the conditions below.
• Do not operate brake pedal during active test.
• Make sure the engine revolution is over 500 rpm.
• Make sure the vehicle is not moving.
FR LH ABS SOLENOID (ACT) FR LH IN SOL — — — Off Off Off
FR LH OUT SOL — — — Off Off Off
CV1 ———OffOnOn
SV1
— — — Off On* Off
RR RH ABS SOLENOID (ACT) RR RH IN SOL — — — Off Off Off
RR RH OUT SOL — — — Off Off Off
CV2 ———OffOnOn
SV2
— — — Off On* Off
RR LH ABS SOLENOID (ACT) RR LH IN SOL — — — Off Off Off
RR LH OUT SOL — — — Off Off Off
CV2 ———OffOnOn
SV2
— — — Off On* Off
Operation
ABS solenoid va
lve ABS solenoid valve (ACT)
Up Keep Down Up ACT UP ACT KEEP
Operation OnOff
MOTOR RELAY OnOff
ACTUATOR RLY OnOn
Operation UpDown
BST OPER SIG OnOff
PRESS SENSOR 50 ± 5 bar 0 bar
PRESS SEN 2 50 ± 5 bar 0 bar
STOP LAMP SW OnOff
STP OFF RLY OffOff
Revision: April 20092010 QX56

C1111 ABS MOTOR, MOTOR RELAY SYSTEM
BRC-37
< COMPONENT DIAGNOSIS > [VDC/TCS/ABS]
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C1111 ABS MOTOR, MOTOR RELAY SYSTEM
DescriptionINFOID:0000000005147980
PUMP
The pump returns the brake fluid stored in the reservoi r to the master cylinder by reducing the pressure.
MOTOR
The motor drives the pump according to the signals transmitted by the ABS actuator and electric unit (control
unit).
DTC LogicINFOID:0000000005147981
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:0000000005147982
Regarding Wiring Diagram information, refer to BRC-92, "Wiring Diagram - BRAKE CONTROL SYSTEM -".
1.CONNECTOR INSPECTION
1. Turn ignition switch OFF.
2. Disconnect ABS actuator and electric unit (control unit) connector.
3. Check terminal for deformation, disconnect, looseness, and so on. If any malfunction is found, repair or
replace terminal.
4. Reconnect connectors and then perform the self-diagnosis. Refer to BRC-23, "
CONSULT-III Function
(ABS)".
Is any item indicated on the self-diagnosis display?
YES >> GO TO 2
NO >> Poor connection of connector terminal. Repair or replace connector.
2.CHECK ABS MOTOR AND MOTOR RELAY POWER SUPPLY CIRCUIT
DTCDisplay item Malfunction detected condition Possible cause
C 1111 P U M P M O T O R During the actuator motor operating with ON, when the
actuator motor turns OFF, or when the control line for ac-
tuator motor relay is open.
• Harness or connector
• ABS actuator and electric unit
(control unit)
During the actuator motor operating with OFF, when the
actuator motor turns ON, or when the control line for relay
is shorted to ground.
Self-diagnosis results
PUMP MOTOR
Revision: April 20092010 QX56

BRC-38
< COMPONENT DIAGNOSIS >[VDC/TCS/ABS]
C1111 ABS MOTOR, MOTOR RELAY SYSTEM
1. Turn ignition switch OFF.
2. Disconnect ABS actuator and elec
tric unit (control unit) connec-
tor.
3. Check voltage between the ABS actuator and electric unit (con- trol unit) connector E125 terminal 1 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 actuator and electric unit (control
unit) connector E125 terminals 16, 47 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:0000000005147983
1.CHECK ACTIVE TEST
1. On “ACTIVE TEST”, select “ABS MOTOR”.
2. Touch “On” and “Off” on screen. Make sure motor re lay 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-37, "
Diagnosis Procedure".
Special Repair RequirementINFOID:0000000005194906
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) —Volt a g e
Connector Terminal
E125 1Ground Battery voltage
AWFIA0017ZZ
ABS actuator and electric unit (control unit)
—Continuity
Connector Terminal
E125 16, 47GroundYes
AWFIA0016ZZ
Operation OnOff
MOTOR RELAY OnOff
ACTUATOR RLY OnOn
Revision: April 20092010 QX56

C1116 STOP LAMP SWITCHBRC-45
< COMPONENT DIAGNOSIS > [VDC/TCS/ABS]
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BRC
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C1116 STOP LAMP SWITCH
DescriptionINFOID:0000000005147995
The stop lamp switch transmits the stop lamp switch signal (ON/OFF) to the ABS actuator and electric unit
(control unit).
DTC LogicINFOID:0000000005147996
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-45, "Diagnosis Procedure".
NO >> Inspection End
Diagnosis ProcedureINFOID:0000000005147997
Regarding Wiring Diagram information, refer to BRC-92, "Wiring Diagram - BRAKE CONTROL SYSTEM -".
1.CONNECTOR INSPECTION
1. Disconnect the ABS actuator and el ectric unit (control unit) connector and stop lamp switch connector.
2. Check the terminals for deformation, disconnection, looseness or damage.
Is the inspection result normal?
YES >> GO TO 2
NO >> Repair or replace as necessary.
2.STOP LAMP SWITCH INSPECTION
1. Connect the stop lamp switch connector.
2. Check the voltage between the ABS actuator and electric unit (control unit) connector E125 terminal 41 and body ground.
Is the inspection result normal?
YES >> Perform self-diagnosis again. If the same results appear, replace ABS actuator and electric unit (control
unit). Refer to BRC-116, "
Removal and Installation".
NO >> GO TO 3
3.STOP LAMP RELAY CIRCUIT INSPECTION
DTC Display item Malfunction detected condition Possible cause
C1116 STOP LAMP SW When stop lamp switch circuit is open. • Harness or connector
• Stop lamp switch
• ABS actuator and electric unit
(control unit)
Self-diagnosis results
STOP LAMP SW
Brake pedal applied : Battery voltage (approx. 12V)
Brake pedal released : Approx. 0V
AWFIA0019ZZ
Revision: April 20092010 QX56

BRC-46
< COMPONENT DIAGNOSIS >[VDC/TCS/ABS]
C1116 STOP LAMP SWITCH
1. Disconnect the stop lamp relay harness connector E12.
2. Check the continuity between t
he ABS actuator and electric unit
(control unit) connector E125 (B) terminal 41 and stop lamp
relay connector E12 (A) terminal 4.
Is the inspection result normal?
YES >> Refer to EXL-4, "Work Flow".
NO >> Repair or replace malfunctioning components.
Special Repair RequirementINFOID:0000000005194913
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
Continuity should exist.
AWFIA0020ZZ
Revision: April 20092010 QX56

C1120, C1122, C1124, C1126 IN ABS SOL
BRC-47
< COMPONENT DIAGNOSIS > [VDC/TCS/ABS]
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C1120, C1122, C1124, C1126 IN ABS SOL
DescriptionINFOID:0000000005147999
The solenoid valve increases, holds or decreases the flui d pressure of each brake caliper according to the sig-
nals transmitted by the ABS actuator and electric unit (control unit).
DTC LogicINFOID:0000000005148000
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-47, "Diagnosis Procedure".
NO >> Inspection End
Diagnosis ProcedureINFOID:0000000005148001
Regarding Wiring Diagram information, refer to BRC-92, "Wiring Diagram - BRAKE CONTROL SYSTEM -".
1.CONNECTOR INSPECTION
1. Turn ignition switch OFF.
2. Disconnect ABS actuator and electric unit (control unit) connector.
3. Check terminal for deformation, disconnection, looseness, and so on. If any malfunction is found, repair or replace terminal.
4. Reconnect connectors and then perform the self-diagnosis. Refer to BRC-23, "
CONSULT-III Function
(ABS)".
Is any item indicated on the self-diagnosis display?
YES >> GO TO 2
NO >> Poor connection of connector terminal. Repair or replace connector.
2.CHECK SOLENOID, VDC SWITCH-OVER VALVE A ND ACTUATOR RELAY POWER SUPPLY CIRCUIT
DTCDisplay item Malfunction detected condition Possible cause
C1120 FR LH IN ABS SOL When the control unit detects a malfunction in the front
LH inlet solenoid circuit.
• ABS actuator and electric unit (control unit)
C1122 FR RH IN ABS SOL
When the control unit detects a malfunction in the front
RH inlet solenoid circuit.
C1124 RR LH IN ABS SOL When the control unit detects a malfunction in the rear LH
inlet solenoid circuit.
C1126 RR RH IN ABS SOL When the control unit detects a malfunction in the rear
RH inlet solenoid circuit.
Self-diagnosis results
FR LH IN ABS SOL
FR RH IN ABS SOL RR LH IN ABS SOL
RR RH IN ABS SOL
Revision: April 20092010 QX56

BRC-48
< COMPONENT DIAGNOSIS >[VDC/TCS/ABS]
C1120, C1122, C1124,
C1126 IN ABS SOL
1. Turn ignition switch OFF.
2. Disconnect ABS actuator and elec tric unit (control unit) connec-
tor.
3. Check voltage between ABS actuator and electric unit (control unit) connector E125 terminal 32 and ground.
Is the inspection result normal?
YES >> GO TO 3
NO >> Repair or replace malfunctioning components.
3.CHECK SOLENOID, VDC SWITCH-OVER VALV E AND ACTUATOR RELAY GROUND CIRCUIT
Check continuity between ABS actuator and electric unit (control
unit) connector E125 terminals 16, 47 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:0000000005148002
1.CHECK ACTIVE TEST
1. Select each test menu item on “ACTIVE TEST”.
2. On the display, touch “Up”, “Keep”, and “Down”, and check that the system operates as shown in the table below.
*: On for 1 to 2 seconds after the touch, and then Off
Is the inspection result normal?
YES >> Inspection End
NO >> Go to diagnosis procedure. Refer to BRC-47, "
Diagnosis Procedure".
Special Repair RequirementINFOID:0000000005194914
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".
ABS actuator and electric unit (control unit)
—Volt a g e
Connector Terminal
E125 32Ground Battery voltage
AWFIA0018ZZ
ABS actuator and electric unit (control unit)
—Continuity
Connector Terminal
E125 16, 47GroundYes
AWFIA0016ZZ
Operation ABS solenoid valve
Up Keep Down
FR RH SOL FR RH IN SOL
OffOn On
FR RH OUT SOL OffOffOn*
FR LH SOL FR LH IN SOL
OffOn On
FR LH OUT SOL OffOffOn*
RR RH SOL RR RH IN SOL
OffOn On
RR RH OUT SOL OffOffOn*
RR LH SOL RR LH IN SOL
OffOn On
RR LH OUT SOL OffOffOn*
Revision: April 20092010 QX56