2011 INFINITI QX56 Factory Service Manual

trailer engine overheat change time fold seats navigation spare wheel

Page 593 of 5598

INFINITI QX56 2011 Factory Service Manual
BRC-76
< DTC/CIRCUIT DIAGNOSIS >[WITH VDC]
C1111 PUMP MOTOR
1. Turn the ignition switch OFF.
2. Check 50A fusible link (M).
3. Check continuity and short circui
t between ABS actuator and electric un

Page 594 of 5598

INFINITI QX56 2011 Factory Service Manual
C1115 WHEEL SENSORBRC-77
< DTC/CIRCUIT DIAGNOSIS > [WITH VDC]
C
D
E
G H
I
J
K L
M A
B
BRC
N
O P
C1115 WHEEL SENSOR
DTC LogicINFOID:0000000006222601
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.CH

C1115 WHEEL SENSORBRC-77
< DTC/CIRCUIT DIAGNOSIS > [WITH VDC]
C
D
E
G H
I
J
K L
M A
B
BRC
N
O P
C1115 WHEEL SENSOR
DTC LogicINFOID:0000000006222601
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.CHECK DTC DETECTION
With CONSULT-III.
1. Start engine and drive vehicle at approx. 30 km/h (19 MPH) or more for approx. 1 minute.
2. Perform self-diagnosis for “ABS”.
Is DTC
“C 111 5” detected?
YES >> Proceed to diagnosis procedure. Refer to BRC-77, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006222602
CAUTION:
For wheel sensor, never check between terminals.
1.CHECK TIRE
1. Turn the ignition switch OFF.
2. Check tire air pressure, wear and size. Refer to WT-69, "
Tire Air Pressure".
Is the inspection result normal?
YES >> GO TO 2.
NO >> Adjust air pressure. Or replace tire. Refer to WT-69, "
Tire Air Pressure".
2.CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) POWER SUPPLY SYSTEM
Check ABS actuator and electric unit (cont rol unit) power supply system. Refer to BRC-113, "
Diagnosis Proce-
dure".
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair or replace error-detected parts.
3.CHECK WHEEL SENSOR HARNESS
1. Disconnect ABS actuator and electric unit (control unit) harness connector.
2. Disconnect wheel sensor harness connector.
3. Check continuity between ABS actuator and electr ic unit (control unit) harness connector and wheel sen-
sor harness connector. (Check continuity when steering wheel is steered to RH and LH, or center harness
in wheel housing is moved.)
Measurement connector and termi nal for power supply circuit
DTC Display Item Malfunction detected condition Possible causes
C 111 5 ABS SENSOR
[ABNORMAL SIGNAL] When difference in wheel speed between any wheel
and others is detected during the vehicle is driven,
because of installation of other tires than specified. Harness or connector
Wheel sensor
Sensor rotor
ABS actuator and electric unit
(control unit)
ABS actuator and electric unit (control unit) Wheel sensor Continuity
Connector Terminal Connector Terminal
E36 20 E22 (Front LH wheel)
1 Existed
33 E39 (Front RH wheel)
22 C10 (Rear LH wheel)
35 C11 (Rear RH wheel)
Revision: 2010 May2011 QX56

Page 595 of 5598

INFINITI QX56 2011 Factory Service Manual
BRC-78
< DTC/CIRCUIT DIAGNOSIS >[WITH VDC]
C1115 WHEEL SENSOR
Measurement connector and te
rminal for signal circuit
4. Check continuity between ABS actuator and electr ic unit (control unit) harness

BRC-78
< DTC/CIRCUIT DIAGNOSIS >[WITH VDC]
C1115 WHEEL SENSOR
Measurement connector and te
rminal for signal circuit
4. Check continuity between ABS actuator and electr ic unit (control unit) harness connector and the ground.
Measurement connector and terminal for ground circuit
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair or replace error-detected parts.
4.CHECK WHEEL SENSOR
Check wheel sensor for damage, disconnection or looseness.
Front wheel sensor: Refer to BRC-134, "
FRONT WHEEL SENSOR : Exploded View".
Rear wheel sensor: Refer to BRC-135, "
REAR WHEEL SENSOR : Exploded View".
Is the inspection result normal?
YES >> GO TO 5.
NO >> Replace wheel sensor. Front wheel sensor: Refer to BRC-134, "
FRONT WHEEL SENSOR : Removal and Installation".
Rear wheel sensor: Refer to BRC-135, "
REAR WHEEL SENSOR : Removal and Installation".
5.CHECK TERMINAL
Check ABS actuator and electric unit (control unit) pin terminals for damage or loose connection with har-
ness connector.
Check each wheel sensor pin terminals for damage or loose connection with harness connector.
Is the inspection result normal?
YES >> GO TO 6.
NO >> Repair or replace error-detected parts.
6.REPLACE WHEEL SENSOR
With CONSULT-III.
1. Connect ABS actuator and electric unit (control unit) harness connector.
2. Replace wheel sensor. Refer to BRC-134, "
FRONT WHEEL SENSOR : Removal and Installation" (front),
BRC-135, "
REAR WHEEL SENSOR : Removal and Installation" (rear).
3. Erase Self-diagnosis result for “ABS”.
4. Start the engine. Drive the vehicle at vehi cle speed of approx. 30 km/h for approx. 1 minute.
5. Perform self-diagnosis for “ABS”.
DTC Is DTC
“C1115” detected?
YES >> Replace ABS actuator and electr ic unit (control unit). Refer to BRC-137, "Removal and Installa-
tion".
NO >> INSPECTION END
ABS actuator and electric unit (control unit) Wheel sensor
Continuity
Connector Terminal Connector Terminal
E36 34 E22 (Front LH wheel)
2 Existed
19 E39 (Front RH wheel)
36 C10 (Rear LH wheel)
21 C11 (Rear RH wheel)
ABS actuator and electric unit (control unit)
—Continuity
Connector Terminal
E36 20, 34
Ground Not existed
33, 19
22, 36
35, 21
Revision: 2010 May2011 QX56

Page 596 of 5598

INFINITI QX56 2011 Factory Service Manual
C1116 STOP LAMP SWITCHBRC-79
< DTC/CIRCUIT DIAGNOSIS > [WITH VDC]
C
D
E
G H
I
J
K L
M A
B
BRC
N
O P
C1116 STOP LAMP SWITCH
DTC LogicINFOID:0000000006222603
DTC DETECTION LOGIC
DTC CONFIRMATION PROCED

Page 597 of 5598

INFINITI QX56 2011 Factory Service Manual
BRC-80
< DTC/CIRCUIT DIAGNOSIS >[WITH VDC]
C1116 STOP LAMP SWITCH
Is the inspection result normal?
YES >> GO TO 8.
NO >> GO TO 4.
4.CHECK STOP LAMP SWITCH CIRCUIT (1)
1. Turn the ignition switch OFF.

Page 598 of 5598

INFINITI QX56 2011 Factory Service Manual
C1116 STOP LAMP SWITCHBRC-81
< DTC/CIRCUIT DIAGNOSIS > [WITH VDC]
C
D
E
G H
I
J
K L
M A
B
BRC
N
O P
7.CHECK STOP LAMP SWITCH CIRCUIT (2)
1. Turn the ignition switch OFF.
2. Check 10A fuse (#3).
3. Di

C1116 STOP LAMP SWITCHBRC-81
< DTC/CIRCUIT DIAGNOSIS > [WITH VDC]
C
D
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BRC
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7.CHECK STOP LAMP SWITCH CIRCUIT (2)
1. Turn the ignition switch OFF.
2. Check 10A fuse (#3).
3. Disconnect fuse block (J/B) harness connector.
4. Check fuse block (J/B) pin terminals for damage or loose connection with harness connector.
5. Check continuity between stop lamp switch harness connector and fuse block (J/B).
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.
8.CHECK STOP LAMP SWITCH POWER SUPPLY (3)
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 13.
NO >> GO TO 9.
9.CHECK STOP LAMP SWITCH CIRCUIT (3)
1. Turn the ignition switch OFF.
2. Disconnect stop lamp switch harness connector.
3. Check continuity between ABS actuator and electr ic unit (control unit) harness connector and stop lamp
switch harness connector.
4. Check continuity between ABS actuator and elec tric unit (control unit) harness connector and ground.
Is the inspection result normal?
Stop lamp switch Fuse block (J/B) Continuity
Connector Terminal Connector Terminal
E115 3 E103 4F Existed
ABS actuator and electric unit (control unit)
— Condition Voltage
Connector Terminal
E36 37 Ground Brake pedal depressed
Approx. 0 V
Brake pedal not depressed
ABS actuator and electric unit (control unit)
— Condition Voltage
Connector Terminal
E36 37 Ground Brake pedal depressed Battery voltage
Brake pedal not depressed Approx. 0 V
ABS actuator and electric unit (control unit) Stop lamp switch Continuity
Connector Terminal Connector Terminal
E36 37 E115 2 Existed
ABS actuator and electric unit (control unit) —Continuity
Connector Terminal
E36 37 Ground Not existed
Revision: 2010 May2011 QX56

Page 599 of 5598

INFINITI QX56 2011 Factory Service Manual
BRC-82
< DTC/CIRCUIT DIAGNOSIS >[WITH VDC]
C1116 STOP LAMP SWITCH
YES >> GO TO 10.
NO >> Repair or replace error-detected parts.
10.CHECK STOP LAMP SWITCH
Check stop lamp switch. Refer to BRC-85, "

BRC-82
< DTC/CIRCUIT DIAGNOSIS >[WITH VDC]
C1116 STOP LAMP SWITCH
YES >> GO TO 10.
NO >> Repair or replace error-detected parts.
10.CHECK STOP LAMP SWITCH
Check stop lamp switch. Refer to BRC-85, "
Component Inspection (Stop lamp Switch)".
Is the inspection result normal?
YES >> GO TO 11.
NO >> Repair or replace stop lamp switch. Refer to BR-20, "
Removal and Installation".
11 .CHECK STOP LAMP SWITCH POWER SUPPLY (4)
1. Check voltage between stop lamp switch harness connector and ground.
2. Turn the ignition switch ON. CAUTION:
Never start engine.
3. Check voltage between stop lamp switch harness connector and ground.
Is the inspection result normal?
YES >> Check pin terminals and connection of stop lamp switch harness connector for abnormal condi- tions. Repair or replace error-detected parts.
NO >> GO TO 12.
12.CHECK STOP LAMP SWITCH CIRCUIT (4)
1. Turn the ignition switch OFF.
2. Check 10A fuse (#7).
3. Disconnect fuse block (J/B) harness connector.
4. Check fuse block (J/B) pin terminals for damage or loose connection with harness connector.
5. Check continuity between stop lamp swit ch harness connector and fuse block (J/B).
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.
13.CHECK STOP LAMP RELAY POWER SUPPLY (1)
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.
Stop lamp switch
— Voltage
Connector Terminal
E115 1 Ground Approx. 0 V
Stop lamp switch — Voltage
Connector Terminal
E115 1 Ground Battery voltage
Stop lamp switch Fuse block (J/B) Continuity
Connector Terminal Connector Terminal
E115 1 E103 8F Existed
ABS actuator and electric unit (control unit)
—Voltage
Connector Terminal
E36 46 Ground Approx. 0 V
Revision: 2010 May2011 QX56

Page 600 of 5598

INFINITI QX56 2011 Factory Service Manual
C1116 STOP LAMP SWITCHBRC-83
< DTC/CIRCUIT DIAGNOSIS > [WITH VDC]
C
D
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G H
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M A
B
BRC
N
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Is the inspection result normal?
YES >> GO TO 18.
NO >> GO TO 14.
14.CHECK STOP LAMP RELAY CIRCUIT

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