2011 INFINITI QX56 Factory Service Manual

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Page 625 of 5598

INFINITI QX56 2011 Factory Service Manual
BRC-108
< DTC/CIRCUIT DIAGNOSIS >[WITH VDC]
C1166, C1167 SV SYSTEM
C1166, C1167 SV SYSTEM
DTC LogicINFOID:0000000006222632
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.CHECK DTC DETECTION
With CO

Page 626 of 5598

INFINITI QX56 2011 Factory Service Manual
C1166, C1167 SV SYSTEMBRC-109
< DTC/CIRCUIT DIAGNOSIS > [WITH VDC]
C
D
E
G H
I
J
K L
M A
B
BRC
N
O P
1. Turn the ignition switch OFF.
2. Check continuity between ABS actuator and electr ic unit (cont

Page 627 of 5598

INFINITI QX56 2011 Factory Service Manual
BRC-110
< DTC/CIRCUIT DIAGNOSIS >[WITH VDC]
C1170 VARIANT CODING
C1170 VARIANT CODING
DTC LogicINFOID:0000000006222634
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.CHECK DTC DETECTION
With CONSUL

Page 628 of 5598

INFINITI QX56 2011 Factory Service Manual
C118E ACCUMULATORBRC-111
< DTC/CIRCUIT DIAGNOSIS > [WITH VDC]
C
D
E
G H
I
J
K L
M A
B
BRC
N
O P
C118E ACCUMULATOR
DTC LogicINFOID:0000000006222636
DTC DETECTION LOGIC
CAUTION:
The VDC warning lamp, A

C118E ACCUMULATORBRC-111
< DTC/CIRCUIT DIAGNOSIS > [WITH VDC]
C
D
E
G H
I
J
K L
M A
B
BRC
N
O P
C118E ACCUMULATOR
DTC LogicINFOID:0000000006222636
DTC DETECTION LOGIC
CAUTION:
The VDC warning lamp, ABS warning lamp and br ake warning lamp turns ON and DTC “C118E” may
be detected in self-diagnosis result of “ABS” when the brake pedal is excessively operated, such as
air bleeding. This is not a system malfunction because this occurs due to the temporary decrease in
accumulator fluid pressure. The system returns to normal condition when the accumulator fluid pres-
sure reaches the specified pressure with the ignition switch ON and the VDC warning lamp, ABS warn-
ing lamp, and brake warning lamp turn OFF. After these steps, ABS self-diagnosis results are erased.
Diagnosis ProcedureINFOID:0000000006222637
1.ERASE SELF-DIAGNOSIS RESULT
CAUTION:
The VDC warning lamp, ABS warning lamp and br ake warning lamp turns ON and DTC “C118E” may
be detected in self-diagnosis result of “ABS” when the brake pedal is excessively operated, such as
air bleeding. This is not a system malfunction because this occurs due to the temporary decrease in
accumulator fluid pressure. The system returns to normal condition when the accumulator fluid pres-
sure reaches the specified pressure with the ignition switch ON and the VDC warning lamp, ABS warn-
ing lamp, and brake warning lamp turn OFF. After these steps, ABS self-diagnosis results are erased.
With CONSULT-III.
1. Erase Self-diagnosis result for “ABS”.
2. Turn the ignition switch OFF.
3. Depress brake pedal to full stroke 20 times or more.
4. Start the engine, and then wait 2 minutes or more.
5. Check VDC warning lamp, ABS warning lamp and brake warning lamp turns OFF.
6. Perform self-diagnosis for “ABS”.
Is any DTC detected?
YES >> Check the DTC. Refer to BRC-51, "DTC Index".
NO >> INSPECTION END
DTC Display Item Malfunction detected condition Possible causes
C118E ACCUMULATOR PRESS When performing excessive brake pedal operation
with the vehicle stopped. [When accumulator fluid
pressure reaches 11.43 MPa (114 bar, 116.6 kg/cm
2,
1657 psi) after reaching 17.3 MPa (173 bar, 176.5 kg/
cm
2, 2509 psi.] —
Revision: 2010 May2011 QX56

Page 629 of 5598

INFINITI QX56 2011 Factory Service Manual
BRC-112
< DTC/CIRCUIT DIAGNOSIS >[WITH VDC]
U1000 CAN COMM CIRCUIT
U1000 CAN COMM CIRCUIT
DescriptionINFOID:0000000006222638
CAN communication allows a high rate of information transmission through t

Page 630 of 5598

INFINITI QX56 2011 Factory Service Manual
POWER SUPPLY AND GROUND CIRCUITBRC-113
< DTC/CIRCUIT DIAGNOSIS > [WITH VDC]
C
D
E
G H
I
J
K L
M A
B
BRC
N
O P
POWER SUPPLY AND GROUND CIRCUIT
DescriptionINFOID:0000000006222641
ABS actuator and elect

POWER SUPPLY AND GROUND CIRCUITBRC-113
< DTC/CIRCUIT DIAGNOSIS > [WITH VDC]
C
D
E
G H
I
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K L
M A
B
BRC
N
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POWER SUPPLY AND GROUND CIRCUIT
DescriptionINFOID:0000000006222641
ABS actuator and electric uni t (control unit) power supply
Diagnosis ProcedureINFOID:0000000006222642
1.CHECK ABS ACTUATOR AND ELECTRIC UNIT (C ONTROL UNIT) IGNITION POWER SUPPLY (1)
1. Turn the ignition switch OFF.
2. Disconnect ABS actuator and electric unit (control unit) harness connector.
3. Check voltage between ABS actuator and electr ic unit (control unit) harness connector and ground.
4. Turn the ignition switch ON CAUTION:
Never start engine.
5. Check voltage between ABS actuator and electr ic unit (control unit) harness connector and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> GO TO 2.
2.CHECK ABS ACTUATOR AND ELECTRIC UNIT (CON TROL UNIT) IGNITION POWER SUPPLY CIRCUIT
(1)
1. Turn the ignition switch OFF.
2. Check 10A fuse (#57).
3. Disconnect IPDM E/R harness connector.
4. Check continuity between ABS actuator and electr ic unit (control unit) harness connector and IPDM E/R
harness connector.
5. Check for continuity between ABS actuator and el ectric unit (control unit) harness connector and the
ground.
Is the inspection result normal?
YES >> Perform trouble diagnosis for ignition power supply. Refer to PG-89, "Wiring Diagram - IGNITION
POWER SUPPLY -".
NO >> Repair or replace error-detected parts.
3.CHECK ABS ACTUATOR AND ELECTRIC UNIT (C ONTROL UNIT) IGNITION POWER SUPPLY (2)
1. Check voltage between ABS actuator and electr ic unit (control unit) harness connector and ground.
ABS actuator and electric unit (control unit)
—Voltage
Connector Terminal
E36 18 Ground Approx. 0 V
ABS actuator and electric unit (control unit) —Voltage
Connector Terminal
E36 18 Ground 10 − 16 V
ABS actuator and electric unit (control unit) IPDM E/R
Continuity
Connector Terminal Connector Terminal
E3618E1559Existed
ABS actuator and electric unit (control unit) —Continuity
Connector Terminal
E36 18 Ground Not existed
Revision: 2010 May2011 QX56

Page 631 of 5598

INFINITI QX56 2011 Factory Service Manual
BRC-114
< DTC/CIRCUIT DIAGNOSIS >[WITH VDC]
POWER SUPPLY AND GROUND CIRCUIT
2. Turn the ignition switch ON
CAUTION:
Never start engine.
3. Check voltage between ABS actuator and electr ic unit (contr

Page 632 of 5598

INFINITI QX56 2011 Factory Service Manual
POWER SUPPLY AND GROUND CIRCUITBRC-115
< DTC/CIRCUIT DIAGNOSIS > [WITH VDC]
C
D
E
G H
I
J
K L
M A
B
BRC
N
O P
Is the inspection result normal?
YES >> Perform trouble diagnosis for battery power suppl

POWER SUPPLY AND GROUND CIRCUITBRC-115
< DTC/CIRCUIT DIAGNOSIS > [WITH VDC]
C
D
E
G H
I
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K L
M A
B
BRC
N
O P
Is the inspection result normal?
YES >> Perform trouble diagnosis for battery power supply. Refer to PG-11, "Wiring Diagram - BATTERY
POWER SUPPLY -".
NO >> Repair or replace error-detected parts.
7.CHECK ACTUATOR RELAY, ABS IN VALVE, ABS OUT VALVE, ANS CUT VALVE, SUCTION VALVE POW-
ER SUPPLY
1. Turn the ignition switch OFF.
2. Check voltage between ABS actuator and electr ic unit (control unit) harness connector and ground.
3. Turn the ignition switch ON CAUTION:
Never start engine.
4. Check voltage between ABS actuator and electr ic unit (control unit) harness connector and ground.
Is the inspection result normal?
YES >> GO TO 9.
NO >> GO TO 8.
8.CHECK ACTUATOR RELAY, ABS IN VALVE, ABS OUT VALVE, ANS CUT VALVE, SUCTION VALVE POW-
ER SUPPLY CIRCUIT 1. Turn the ignition switch OFF.
2. Check 30A fusible link (L).
3. Check continuity and short circuit between ABS act uator and electric unit (control unit) harness connector
terminal (1) and 30A fusible link (L).
Is the inspection result normal?
YES >> Perform trouble diagnosis for battery power supply. Refer to PG-11, "Wiring Diagram - BATTERY
POWER SUPPLY -".
NO >> Repair or replace error-detected parts.
9.CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) GROUND CIRCUIT
Check for continuity between ABS actuator and elec tric unit (control unit) harness connector and the ground.
Is the inspection result normal?
YES >> GO TO 10.
NO >> Repair or replace error-detected parts.
10.CHECK TERMINAL
Check ABS actuator and electric unit (control unit) pin terminals for damage or loose connection with har-
ness connector.
Check IPDM E/R pin terminals for damage or loose connection with harness connector.
Is the inspection result normal?
YES >> INSPECTION END
ABS actuator and electric unit (control unit)
—Voltage
Connector Terminal
E36 1 Ground Battery voltage
ABS actuator and electric unit (control unit)
—Voltage
Connector Terminal
E36 1 Ground Battery voltage
ABS actuator and electric unit (control unit) —Continuity
Connector Terminal
E36 2
Ground Existed
3
E37 48
Revision: 2010 May2011 QX56

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