relay INFINITI QX56 2007 Factory Workshop Manual

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
BRC-39
< SERVICE INFORMATION >[VDC/TCS/ABS]
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1. Disconnect ABS actuator and electric unit (control unit) connector E125.
2. Check the terminals for deformation, disconnection, looseness or damage.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace as necessary.
3.CHECKING SOLENOID POWER AND GROUND
1. Check voltage between ABS actuator and electric unit (control
unit) harness connector E125 and body ground.
2. Check resistance between ABS actuator and electric unit (con-
trol unit) harness connector E125 and body ground.
OK or NG
OK >> Perform self-diagnosis again. If the same results
appear, replace ABS actuator and electric unit (control unit). Refer to BRC-58, "
Removal and
Installation".
NG >> Repair the circuit.
Actuator Motor, Motor Relay, and Circuit InspectionINFOID:0000000003532790
INSPECTION PROCEDURE
1.CHECKING SELF-DIAGNOSIS RESULTS
Check self-diagnosis results.
Is the above displayed in the self-diagnosis display items?
YES >> GO TO 2.
NO >> Inspection End.
2.CONNECTOR INSPECTION
1. Disconnect ABS actuator and electric unit (control unit) connector E125.
2. Check the terminals for deformation, disconnection, looseness or damage.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace as necessary.
3.CHECKING ABS MOTOR AND MOTOR RELAY POWER SYSTEMABS actuator and electric unit
(control unit) connector E125Body
groundMeasured
value
(Approx.)
32 — 12V
WFIA0195E
ABS actuator and electric unit
(control unit) connector E125Body
groundMeasured
value
(Approx.)
16 —
0Ω
47 —
WFIA0196E
Self-diagnosis results
PUMP MOTOR
ACTUATOR RLY

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
BRC-41
< SERVICE INFORMATION >[VDC/TCS/ABS]
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Check the voltage between the ABS actuator and electric unit (con-
trol unit) harness connector E125 terminal 41 and body ground.
OK or NG
OK >> Perform self-diagnosis again. If the same results
appear, replace ABS actuator and electric unit (control
unit). Refer to BRC-58, "
Removal and Installation".
NG >> GO TO 4.
4.STOP LAMP RELAY CIRCUIT INSPECTION
1. Disconnect the stop lamp relay harness connector E12.
2. Check the continuity between the ABS actuator and electric unit
(control unit) harness connector E125 (B) terminal 41 and stop
lamp relay harness connector E12 (A) terminal 4.
OK or NG
OK >> Perform self-diagnosis again. If the same results
appear, replace ABS actuator and electric unit (control
unit). Refer to BRC-58, "
Removal and Installation"BRC-
58, "Removal and Installation".
NG >> Refer to "Stop Lamp Switch System Inspection".
ABS/TCS/VDC Control Unit Power and Ground Systems InspectionINFOID:0000000003532792
INSPECTION PROCEDURE
1.SELF-DIAGNOSIS RESULT CHECK
Check self-diagnosis results.
Is the above displayed in the self-diagnosis display items?
YES >> GO TO 2.
NO >> Inspection End.
2.CONNECTOR INSPECTION
1. Disconnect the ABS actuator and electric unit (control unit) connector E125.
2. Check the terminals for deformation, disconnection, looseness or damage.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace as necessary.
3.ABS/TCS/VDC CONTROL UNIT POWER AND GROUND CIRCUIT INSPECTION
Measure the voltage and continuity between the ABS actuator and electric unit (control unit) harness connec-
tor E125 and body ground.Brake pedal depressed : Battery voltage
(approx. 12V)
Brake pedal not depressed : Approx. 0V
WFIA0198E
Continuity should exist
WFIA0431E
Self-diagnosis results
BATTERY VOLTAGE
Signal nameABS actuator and electric unit
(control unit) connector E125Body
groundMeasured value
Power supply1
— Battery voltage (Approx. 12V)
32

DI-36
< SERVICE INFORMATION >
WARNING CHIME
WARNING CHIME
Component Parts and Harness Connector LocationINFOID:0000000003533510
System DescriptionINFOID:0000000003533511
FUNCTION
Power is supplied at all times
• through 50A fusible link (letter f, located in the fuse and fusible link box)
• to BCM terminal 70,
• through 10A fuse [No. 19, located in the fuse block (J/B)]
1. Fuse block (J/B) 2. Fuse and fusible link box 3. Fuse and relay box
4. Combination meter M24 5. Combination switch (lighting switch)
M286. BCM M18, M19, M20 (view with in-
strument lower panel LH removed)
7. Front door switch LH B8 8. Key switch and key lock solenoid
M279. Seat belt buckle pre-tensioner as-
sembly LH (seat belt buckle switch)
B74
WKIA4594E

WARNING CHIME
DI-37
< SERVICE INFORMATION >
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• to key switch and key lock solenoid terminal 3.
With ignition switch in ON or START position, power is supplied
• through 10A fuse (No. 59, located in the fuse and relay box)
• to BCM terminal 38.
Ground is supplied
• to BCM terminal 67
• through body grounds M57, M61, and M79.
NOTE:
When ignition key warning chime, light warning chime, and seat belt warning chime are required at the same
time, the priorities for each chime are the following.
1. Light warning chime
2. Ignition key warning chime
3. Seat belt warning chime
IGNITION KEY WARNING CHIME
With the key inserted in the ignition switch, the ignition switch in OFF position, and the driver's door open, the
warning chime will sound.
Power is supplied
• through key switch and key lock solenoid terminal 4
• to BCM terminal 37.
Ground is supplied
• to BCM terminal 47
• through front door switch LH terminal 2.
Front door switch LH is case grounded.
BCM detects key inserted into the ignition switch, and sends key warning signal to combination meter via CAN
communication lines. When the combination meter receives key warning signal, it sounds warning chime.
LIGHT WARNING CHIME
With the key removed from the ignition switch, the driver's door open, and the lighting switch (part of the com-
bination switch) in 1st or 2nd position, the warning chime will sound. [Except when headlamp battery saver
control operates (5 minutes after ignition switch is turned to OFF or ACC position) and headlamps do not illu-
minate.]
Signal is supplied
• from combination switch (lighting switch) terminals 1, 2, 3, 4, 5, 6, 7, 8, 9 and 10
• to BCM terminals 2, 3, 4, 5, 6, 32, 33, 34, 35 and 36.
NOTE:
BCM detected lighting switch in 1st or 2nd position. Refer to LT-72, "
Combination Switch Reading Function".
Ground is supplied
• to BCM terminal 47
• through front door switch LH terminal 2.
Front door switch LH is case grounded.
BCM detects headlamps are illuminated, and sends light warning signal to combination meter CAN communi-
cation lines. When the combination meter receives light warning signal, it sounds warning chime.
SEAT BELT WARNING CHIME
When the ignition switch is turned ON with the seat belt unfastened [seat belt buckle pre-tensioner assembly
LH (seat belt buckle switch) unfastened], warning chime will sound for approximately 6 seconds.
Ground is supplied
• to combination meter terminal 27
• through seat belt buckle pre-tensioner assembly LH (seat belt buckle switch) terminal 4.
Seat belt buckle pre-tensioner assembly LH (seat belt buckle switch) terminal 3 is grounded through body
grounds B7 and B19.
The combination meter sends seat belt buckle switch LH unfastened signal to BCM via CAN communication
line.
BCM receives seat belt buckle pre-tensioner assembly LH (seat belt buckle switch) unfastened signal from
combination meter via CAN communication line, and sends seat belt warning signal to the combination meter
via CAN communication line. When the combination meter receives the seat belt warning signal, it sounds the
warning chime. The BCM controls the (6 second) duration of the seat belt warning chime.
CAN Communication System DescriptionINFOID:0000000003533512
Refer to LAN-4.

DI-46
< SERVICE INFORMATION >
REAR SONAR SYSTEM
REAR SONAR SYSTEM
Component Parts and Harness Connector LocationINFOID:0000000003533524
System DescriptionINFOID:0000000003533525
FUNCTION
With the ignition switch in the ON or START position, power is supplied
• through 10A fuse [No. 12, located in the fuse block (J/B)]
• to sonar control unit terminal 8,
• through 10A fuse (No. 51, located in the IPDM E/R)
• to back-up lamp relay terminals 1 and 3.
1. Fuse block (J/B) 2. IPDM E/R E119 3. Sonar buzzer M117
4. Rear sonar system OFF switch M116 5. Sonar control unit B56 (view of left
rear body)6. Rear sonar sensor LH outer C102
7. Rear sonar sensor LH inner C103 8. Rear sonar sensor RH inner C104 9. Rear sonar sensor RH outer C105
10. A/T assembly F9 11. Back-up lamp relay M73
WKIA4595E

REAR SONAR SYSTEM
DI-47
< SERVICE INFORMATION >
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Ground is supplied
• to sonar control unit terminal 6
• through body grounds B7 and B19.
With the ignition switch in the ON or START position, and the transmission gear selector lever in the R posi-
tion, power is supplied
• to sonar control unit terminal 5
• from back-up lamp relay terminal 5.
With power and ground supplied, transmission gear selector lever in R position, and the rear sonar system
OFF switch ON, the rear sonar system will detect obstacles within 1.8 m (5.9 ft.) of the rear sonar sensors. The
vehicle operator is notified of obstacles by varied rate of tone from the sonar buzzer depending on distance of
obstacle being sensed.
REAR SONAR SYSTEM OFF SWITCH
With power and ground supplied to the sonar control unit, transmission gear selector lever in R position, the
sonar system can be disabled and the sonar buzzer silenced by momentarily pressing the rear sonar system
OFF switch. The rear sonar system OFF indicator lamp will be illuminated in the rear sonar system OFF
switch.
To disable the rear sonar system, ground is supplied
• to sonar control unit terminal 13
• through rear sonar system OFF switch terminal 1
• through rear sonar system OFF switch terminal 2
• from body grounds M57, M61, and M79.
To light the rear sonar system OFF indicator, power is supplied
• from sonar control unit terminal 4
• to the rear sonar system OFF switch terminal 5.
Ground is supplied
• to the rear sonar system OFF switch terminal 6
• from body grounds M57, M61, and M79.
The rear sonar system and buzzer will be disabled and the rear sonar system OFF indicator will be illuminated
until the ignition switch is turned OFF. When the ignition switch is turned ON, the rear sonar system will be
enabled. Depressing the rear sonar system OFF switch momentarily will enable the rear sonar system also.
Enabling the rear sonar system will cause the rear sonar system OFF indicator to go out.
SONAR BUZZER
With power supplied to the sonar control unit and the transmission gear selector lever in R position, a station-
ary object that is at least 7.0 cm (2.8 in.) wide and 1.0 m (39.0 in.) tall and that is closer than 1.8 meters (5.9 ft.)
will be detected by the rear sonar sensors, causing the sonar buzzer to sound a tone. As the vehicle moves
closer to the object, the rate of the tone will increase. When the object is less than 25.0 cm (10 in.) from the
rear bumper, the tone will sound continuously.
Power is supplied
• from sonar control unit terminal 7
• to sonar buzzer terminal +.
Ground is supplied
• to sonar buzzer terminal -
• from sonar control unit terminal 3.
REAR SONAR SENSOR
With power and ground supplied to the rear sonar sensors, the sonar sensors transmit a 38.4 kHz ultrasonic
signal. This signal is reflected back to the sensor by objects large enough and close enough to be detected.
The rear sonar sensors measure the time from the transmitted signal to the time the signal is reflected back
and sends this information to the sonar control unit.
Power is supplied
• from sonar control unit terminal 16
• to each rear sonar sensor terminal 1.
Ground is supplied
• to each rear sonar sensor terminal 3
• from sonar control unit terminal 15.
Signal is supplied
• from each rear sonar sensor terminal 2
• to sonar control unit terminals 9, 10, 11 and 12.

DI-58
< SERVICE INFORMATION >
REAR VIEW MONITOR
REAR VIEW MONITOR
Component Parts and Harness Connector LocationINFOID:0000000003533538
System DescriptionINFOID:0000000003533539
• When the A/T selector is in the reverse position, the display shows view to the rear of the vehicle.
• Lines which indicate the vehicle clearance and distances are displayed on the monitor.
POWER SUPPLY AND GROUND
Power is supplied at all times
• through 20A fuse (No. 31, located in the fuse and fusible link box)
1. Fuse block (J/B) 2. Fuse and fusible link box 3. IPDM E/R E119
4. Rear view camera D504 5. Data link connector M22 6. A/T assembly F9
7. Rear view camera control unit B73
(view of left rear body)8. Display unit M93 9. Display control unit M94, M95
10. AV switch M98 11. Back-up lamp relay M73
WKIA4596E

REAR VIEW MONITOR
DI-59
< SERVICE INFORMATION >
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• to rear view camera control unit terminal 1.
When ignition switch is in ACC or ON position, power is supplied
• through 10A fuse [No. 4, located in the fuse block (J/B)]
• to rear view camera control unit terminal 2.
Ground is supplied
• to rear view camera control unit terminal 3 and
• to rear view camera terminal 2
• through grounds B7 and B19.
AV COMMUNICATION LINE
Rear view camera control unit is connected to the following units with AV communication line. Each unit trans-
mits/receives data with AV communication line.
• NAVI control unit
• Display unit
• Display control unit
• AV switch
REAR VIEW CAMERA OPERATION
When ignition switch is in ON or START position, power is supplied
• through 10A fuse (No. 51, located in the IPDM E/R)
• to back-up lamp relay terminals 1 and 3.
When A/T selector lever is in reverse position, power is supplied
• through back-up lamp relay terminal 2
• to TCM terminal 7.
Then, when back-up lamp relay is energized,
• from back-up lamp relay terminal 5
• to rear view camera control unit terminal 4.
Then, rear view camera control unit is sent camera ON signal
• through rear view camera control unit terminal 8
• to rear view camera terminal 1.
An image taken by rear view camera is sent
• through rear view camera terminals 3 and 4
• to rear view camera control unit terminals 10 and 9.
Then an image is sent
• through rear view camera control unit terminals 11 and 12
• to display unit terminals 4 and 15.
An image of rear view will be projected on the display.
Side Distance Guideline
When A/T selector lever is in reverse position, rear view camera control unit is sent rear view camera guideline
image
• through rear view camera control unit terminals 11 and 12
• to display unit terminals 4 and 15.
Rear view camera guideline will be projected on the display.
Display shows image from rear view camera image and rear view camera guideline.

DI-68
< SERVICE INFORMATION >
REAR VIEW MONITOR
1. Turn ignition switch ON.
2. Shift A/T selector lever to R position.
Does back-up lamp illuminate?
YES >> GO TO 2.
NO >> Check back-up lamp system. Refer to LT- 8 0
.
2.CHECK REVERSE POSITION INPUT SIGNAL
With CONSULT-II
Select “DATA MONITOR” of “REARVIEW CAMERA”. Operate igni-
tion switch with “R POSI SIG” of “DATA MONITOR” and check oper-
ate status.
Without CONSULT-II
1. Turn ignition switch OFF.
2. Disconnect rear view camera control unit connector.
3. Turn ignition switch ON.
4. Shift A/T selector lever to R position.
5. Check voltage between rear view camera control unit harness
connector B73 terminal 4 and ground.
OK or NG
OK >> GO TO 3.
NG >> Check harness for open or short between rear view
camera control unit and back-up lamp relay.
3.CHECK DISPLAY CONTROL UNIT OUTPUT SIGNAL
1. Turn ignition switch OFF.
2. Disconnect rear view camera control unit connector.
3. Turn ignition switch ON.
4. Check voltage between rear view camera control unit harness
connector B73 terminal 5 and ground.
OK or NG
OK >> GO TO 5.
NG >> GO TO 4.
4.CHECK DISPLAY CONTROL UNIT CIRCUIT
SKIA7147E
Battery voltage should exist.
SKIA5086E
Voltage : Approx. 5V
SKIA7148E

EC-7
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DTC P1564 ICC STEERING SWITCH .............507
Component Description .........................................507
CONSULT-II Reference Value in Data Monitor
Mode .....................................................................
507
On Board Diagnosis Logic ....................................507
DTC Confirmation Procedure ................................507
Wiring Diagram .....................................................509
Diagnosis Procedure .............................................510
Component Inspection ..........................................512
DTC P1564 ASCD STEERING SWITCH .........513
Component Description .........................................513
CONSULT-II Reference Value in Data Monitor
Mode .....................................................................
513
On Board Diagnosis Logic ....................................513
DTC Confirmation Procedure ................................513
Wiring Diagram .....................................................515
Diagnosis Procedure .............................................516
Component Inspection ..........................................518
DTC P1568 ICC FUNCTION ............................519
On Board Diagnosis Logic ....................................519
DTC Confirmation Procedure ................................519
Diagnosis Procedure .............................................519
DTC P1572 ICC BRAKE SWITCH ...................520
Component Description .........................................520
CONSULT-II Reference Value in Data Monitor
Mode .....................................................................
520
On Board Diagnosis Logic ....................................520
DTC Confirmation Procedure ................................520
Wiring Diagram .....................................................522
Diagnosis Procedure .............................................523
Component Inspection ..........................................526
DTC P1572 ASCD BRAKE SWITCH ...............528
Component Description .........................................528
CONSULT-II Reference Value in Data Monitor
Mode .....................................................................
528
On Board Diagnosis Logic ....................................528
DTC Confirmation Procedure ................................528
Wiring Diagram .....................................................530
Diagnosis Procedure .............................................531
Component Inspection ..........................................534
DTC P1574 ICC VEHICLE SPEED SENSOR ..535
Component Description .........................................535
On Board Diagnosis Logic ....................................535
DTC Confirmation Procedure ................................535
Diagnosis Procedure .............................................536
DTC P1574 ASCD VEHICLE SPEED SEN-
SOR ..................................................................
537
Component Description .........................................537
On Board Diagnosis Logic ....................................537
DTC Confirmation Procedure ................................537
Diagnosis Procedure .............................................538
DTC P1805 BRAKE SWITCH ..........................539
Description ............................................................539
CONSULT-II Reference Value in Data Monitor
Mode ......................................................................
539
On Board Diagnosis Logic .....................................539
DTC Confirmation Procedure ................................539
Wiring Diagram ......................................................540
Diagnosis Procedure .............................................541
Component Inspection ...........................................542
DTC P2100, P2103 THROTTLE CONTROL
MOTOR RELAY ..............................................
543
Component Description .........................................543
CONSULT-II Reference Value in Data Monitor
Mode ......................................................................
543
On Board Diagnosis Logic .....................................543
DTC Confirmation Procedure ................................543
Wiring Diagram ......................................................545
Diagnosis Procedure .............................................546
DTC P2101 ELECTRIC THROTTLE CON-
TROL FUNCTION ...........................................
548
Description .............................................................548
On Board Diagnosis Logic .....................................548
DTC Confirmation Procedure ................................548
Wiring Diagram ......................................................549
Diagnosis Procedure .............................................550
Component Inspection ...........................................553
Removal and Installation .......................................553
DTC P2118 THROTTLE CONTROL MOTOR .554
Component Description .........................................554
On Board Diagnosis Logic .....................................554
DTC Confirmation Procedure ................................554
Wiring Diagram ......................................................555
Diagnosis Procedure .............................................556
Component Inspection ...........................................557
Removal and Installation .......................................557
DTC P2119 ELECTRIC THROTTLE CON-
TROL ACTUATOR ..........................................
559
Component Description .........................................559
On Board Diagnosis Logic .....................................559
DTC Confirmation Procedure ................................559
Diagnosis Procedure .............................................560
DTC P2122, P2123 APP SENSOR .................561
Component Description .........................................561
CONSULT-II Reference Value in Data Monitor
Mode ......................................................................
561
On Board Diagnosis Logic .....................................561
DTC Confirmation Procedure ................................561
Wiring Diagram ......................................................563
Diagnosis Procedure .............................................564
Component Inspection ...........................................566
Removal and Installation .......................................566
DTC P2127, P2128 APP SENSOR .................567
Component Description .........................................567
CONSULT-II Reference Value in Data Monitor
Mode ......................................................................
567
On Board Diagnosis Logic .....................................567