2005 INFINITI QX4 key

BR-14
BRAKE MASTER CYLINDER
Revision: October 20052005 QX56
BRAKE MASTER CYLINDERPFP:46010
On-board InspectionEFS004W9
LEAK INSPECTION

Check for leaks at brake master cylinder to brake booster attachment point, reservoir tank, and brake tube
connections.
Removal and InstallationEFS004WA
REMOVAL
CAUTION:

Be careful not to splash brake fluid on painted areas; it may cause paint damage. If brake fluid is
splashed on painted areas, wash it away with water immediately.

Before removing brake brake master cylinder, depress the brake pedal 5-6 times with the key OFF
to deplete vacuum in the booster.
1. Drain brake fluid. Refer to BR-9, "
Drain and Refill" .
2. Disconnect harness connectors for fluid level sensor and pressure sensors.
3. Using a flare nut wrench, disconnect brake tube from brake master cylinder.
4. Remove brake master cylinder mounting nuts, and master cylinder assembly.
1. Reservoir cap 2. Fluid level sensor 3. Grommet
4. Master cylinder sub-assembly 5. Front pressure sensor 6. Rear pressure sensor
7. Reservoir tank 8. Seal
WFIA0378E

TROUBLE DIAGNOSIS
BRC-35
[VDC/TCS/ABS]
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×: Applicable
–: Not applicableVDC SIGNAL
(ON/OFF)––×VDC operation (ON/OFF) status is
displayed.
EBD WARN LAMP – –×Brake warning lamp (ON/OFF) sta-
tus is displayed.
SLCT LVR POSI×××Shift position judged by PNP switch
signal.
R POSI SIG – –×Shift position judged by PNP switch
signal.
4WD FAIL REQ – –×The state of 4WD controller is dis-
played by CAN communication sig-
nal.
2WD/4WD – –×It recognizes on software whether it
is 2WD and whether it is in 4WD
state.
BST OPER SIG – –×Active booster operation (ON/OFF)
status is displayed.
PRESS SENSOR×–×Brake pressure detected by pres-
sure sensor is displayed.
CRANKING SIG – –×The input state of the key SW
START position signal is displayed.
PRESS SEN 2 – –×Brake pressure detected by pres-
sure sensor is displayed.
DELTA S SEN – –×The amount of stroke sensor move-
ments in the active booster
detected by DELTA S SEN is dis-
played.
RELEASE SW NO – –×Release switch signal (ON/OFF)
status is displayed. "ON" indicates
that the brake pedal is depressed.
"OFF" is that the brake pedal is
released.
RELEASE SW NC – –×Release switch signal (ON/OFF)
status is displayed. "OFF" indi-
cates that the brake pedal is
depressed on. "ON" is that the
brake pedal is released.
OHB FAIL – –×OHB fail status is displayed.
HBA FAIL – –×HBA fail status is displayed.
OHB SIG – –×OHB operation (ON/OFF) status is
displayed.
HBA SIG – –×HBA operation (ON/OFF) status is
displayed.
PRES CTRL ACC – –×Pressure control state (ON/OFF) is
displayed. It is applied only to an
ICC vehicle.
PRES FAIL ACC – –×Pressure control fail state (ON/
OFF) is displayed. It is applied only
to an ICC vehicle.
STP OFF RLY – –×Stop lamp relay signal (ON/OFF)
status is displayed. Item
(Unit)Data monitor item selection
Remarks
ECU INPUT
SIGNALSMAIN
SIGNALSSELECTION
FROM MENU

DI-1
DRIVER INFORMATION SYSTEM
K ELECTRICAL
CONTENTS
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SECTION DI
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DI
Revision: October 20052005 QX56 PRECAUTION ............................................................ 3
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” .................................................................. 3
Wiring Diagrams and Trouble Diagnosis .................. 3
PREPARATION ........................................................... 4
Commercial Service Tool ......................................... 4
COMBINATION METERS ........................................... 5
System Description .................................................. 5
UNIFIED METER CONTROL UNIT ...................... 5
POWER SUPPLY AND GROUND CIRCUIT ........ 6
WATER TEMPERATURE GAUGE ........................ 6
ENGINE OIL PRESSURE GAUGE ....................... 6
A/T OIL TEMPERATURE GAUGE ........................ 6
VOLTAGE GAUGE ................................................ 6
TACHOMETER ..................................................... 6
FUEL GAUGE ....................................................... 6
SPEEDOMETER ................................................... 6
CAN COMMUNICATION SYSTEM DESCRIP-
TION ...................................................................... 6
Component Parts and Harness Connector Location ..... 7
Combination Meter ................................................... 8
CHECK .................................................................. 8
Circuit Diagram ........................................................ 9
Wiring Diagram — METER — ................................ 10
Terminals and Reference Value for Combination
Meter ...................................................................... 12
Meter/Gauge Operation and Odo/Trip Meter ......... 13
SELF-DIAGNOSIS FUNCTION .......................... 13
HOW TO INITIATE COMBINATION METER
SELF- DIAGNOSIS MODE ................................. 13
COMBINATION METER SELF-DIAGNOSIS
MODE FUNCTIONS ........................................... 13
How to Proceed With Trouble Diagnosis ................ 17
Diagnosis Flow ....................................................... 17
Power Supply and Ground Circuit Inspection ........ 18
Symptom Chart ...................................................... 19
Vehicle Speed Signal Inspection ............................ 19
Engine Oil Pressure Signal Inspection ................... 19
Water Temperature Signal Inspection .................... 21Engine Speed Signal Inspection ............................. 21
Fuel Level Sensor Unit Inspection .......................... 22
FUEL LEVEL SENSOR UNIT ............................. 22
LOW-FUEL WARNING LAMP ............................. 22
Fuel Gauge Fluctuates, Indicates Wrong Value, or
Varies ...................................................................... 24
Fuel Gauge Does Not Move to Full-position ........... 24
Electrical Components Inspection .......................... 25
FUEL LEVEL SENSOR UNIT CHECK ................ 25
Removal and Installation of Combination Meter ..... 25
COMPASS AND THERMOMETER ........................... 26
System Description ................................................. 26
OUTSIDE TEMPERATURE DISPLAY ................. 26
DIRECTION DISPLAY ......................................... 26
Wiring Diagram — COMPAS — ............................. 27
Trouble Diagnoses ................................................. 28
PRELIMINARY CHECK FOR THERMOMETER ... 28
INSPECTION/COMPASS AND THERMOME-
TER ..................................................................... 28
Calibration Procedure for Compass ....................... 29
CORRECTION FUNCTIONS OF COMPASS ...... 29
INITIAL CORRECTION PROCEDURE FOR
COMPASS ........................................................... 29
WARNING LAMPS .................................................... 30
Schematic ............................................................... 30
Wiring Diagram — WARN — .................................. 31
Oil Pressure Warning Lamp Stays Off (Ignition
Switch ON) ............................................................. 37
Oil Pressure Warning Lamp Does Not Turn Off (Oil
Pressure Is Normal) ................................................ 39
A/T INDICATOR ........................................................ 40
Wiring Diagram — AT/IND — ................................. 40
A/T Indicator Does Not Illuminate ........................... 41
WARNING CHIME ..................................................... 42
Component Parts and Harness Connector Location ... 42
System Description ................................................. 42
FUNCTION .......................................................... 42
IGNITION KEY WARNING CHIME ..................... 43
LIGHT WARNING CHIME ................................... 43
SEAT BELT WARNING CHIME ........................... 43

DI-2Revision: October 20052005 QX56 CAN Communication System Description .............. 43
Wiring Diagram — CHIME — ................................. 44
Terminals and Reference Value for BCM ................ 46
Terminals and Reference Value for Combination
Meter ...................................................................... 47
How to Proceed With Trouble Diagnosis ................ 47
Preliminary Check .................................................. 47
INSPECTION FOR POWER SUPPLY AND
GROUND CIRCUIT ............................................. 47
CONSULT-II Function (BCM) .................................. 49
CONSULT-II BASIC OPERATION PROCEDURE
... 49
DATA MONITOR .................................................. 50
ACTIVE TEST ..................................................... 50
SELF-DIAGNOSTIC RESULTS ........................... 51
All Warning Chimes Do Not Operate ...................... 51
Key Warning Chime and Light Warning Chime Do
Not Operate (Seat Belt Warning Chime Does Oper-
ate) ......................................................................... 52
Key Warning Chime Does Not Operate .................. 53
Light Warning Chime Does Not Operate ................ 55
Seat Belt Warning Chime Does Not Operate ......... 56
REAR SONAR SYSTEM ........................................... 58
Component Parts and Harness Connector Location ... 58
System Description ................................................. 59
FUNCTION .......................................................... 59
REAR SONAR SYSTEM OFF SWITCH .............. 59
SONAR BUZZER ................................................ 59
REAR SONAR SENSOR ..................................... 60
Wiring Diagram — SONAR — ................................ 61
Terminals And Reference Value For Sonar Control
Unit ......................................................................... 63
How to Proceed With Trouble Diagnosis ................ 63
Pre-diagnosis Inspection ........................................ 64
SENSOR STATUS CHECK ................................. 64
Self-diagnosis Function .......................................... 64
ENTERING DIAGNOSTICS MODE .................... 64
REQUESTING NUMBER OF FAULT CODES
MODE .................................................................. 64
REQUESTING FAULT CODES MODE ............... 65
IDLING OR CLEARING FAULT CODES MODE ... 65
Preliminary Check .................................................. 66INSPECTION FOR POWER SUPPLY AND
GROUND CIRCUIT .............................................66
Symptom Chart .......................................................67
Component Inspection ............................................68
SONAR BUZZER .................................................68
REAR SONAR SYSTEM OFF SWITCH ..............68
REAR SONAR SYSTEM OFF INDICATOR .........68
Removal and Installation of Rear Sonar System ....68
REAR SONAR SENSORS ...................................68
SONAR CONTROL UNIT ....................................68
CLOCK ......................................................................69
Wiring Diagram — CLOCK — .................................69
Removal and Installation of Clock ...........................70
REMOVAL ............................................................70
INSTALLATION ....................................................70
REAR VIEW MONITOR .............................................71
Component Parts and Harness Connector Location ...71
System Description .................................................72
POWER SUPPLY AND GROUND .......................72
AV COMMUNICATION LINE ...............................72
REAR VIEW CAMERA OPERATION ..................72
Schematic ...............................................................73
Wiring Diagram — R/VIEW — ................................74
Terminals and Reference Value for Rear View Cam-
era Control Unit .......................................................77
CONSULT-II Function (REARVIEW CAMERA) ......78
CONSULT-II BASIC OPERATION .......................78
WORK SUPPORT ...............................................79
DATA MONITOR ..................................................79
Side Distance Guideline Correction ........................80
SIDE DISTANCE GUIDELINE CORRECTION
PROCEDURE ......................................................80
Power Supply and Ground Circuit Inspection .........82
Rear View Is Not Displayed With The A/T Selector
Lever In R Position ..................................................83
Removal and Installation of Rear View Camera Con-
trol Unit ....................................................................87
REMOVAL ............................................................87
INSTALLATION ....................................................87
Removal and Installation of Rear View Camera .....87
REMOVAL ............................................................87
INSTALLATION ....................................................87

DI-42
WARNING CHIME
Revision: October 20052005 QX56
WARNING CHIMEPFP:24814
Component Parts and Harness Connector LocationEKS00BCO
System DescriptionEKS00BCP
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, and

through 10A fuse [No. 19, located in the fuse block (J/B)]

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
1. Combination meter M24 2. Combination switch (lighting switch)
M283. Steering column (view with instru-
ment lower panel LH removed)
4. BCM M18, M19, M20 5. Front door switch LH B8 6. Key switch and key lock solenoid
M27
7. Seat belt buckle pre-tensioner
assembly (seat belt buckle switch)
LH B74
LKIA0692E

WARNING CHIME
DI-43
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Revision: October 20052005 QX56
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 BCS-3, "
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
(seat belt buckle switch) LH unfastened], warning chime will sound for approximately 6 seconds.
Ground is supplied

to combination meter terminal 27

through seat belt buckle pre-tensioner assembly (seat belt buckle switch) LH terminal 1.
Seat belt buckle pre-tensioner assembly (seat belt buckle switch) LH terminal 2 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 (seat belt buckle switch) LH 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 DescriptionEKS00BCQ
Refer to LAN-5, "CAN COMMUNICATION" .

WARNING CHIME
DI-47
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Terminals and Reference Value for Combination MeterEKS00BCT
How to Proceed With Trouble DiagnosisEKS00BCU
1. Confirm the symptom or customer complaint.
2. Understand operation description and function description. Refer to DI-42, "
System Description" .
3. Perform the preliminary check. Refer to DI-47, "
Preliminary Check" .
4. Check symptom and repair or replace the cause of malfunction.
5. Does the warning chime operate properly? If so, go to 6. If not, go to 3.
6. Inspection End.
Preliminary CheckEKS00BCV
INSPECTION FOR POWER SUPPLY AND GROUND CIRCUIT
1. CHECK FUSE AND FUSIBLE LINK
Check for blown BCM fuse or fusible link.
Refer to DI-44, "Wiring Diagram — CHIME —" .
OK or NG
OK >> GO TO 2.
NG >> If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse. Refer to PG-
4, "POWER SUPPLY ROUTING CIRCUIT" .
35 O/B Combination switch output 2
ON

Light switch and wiper switch
OFF

Wiper dial position 4 36 R/W Combination switch output 1
37 B/R Key switch signal OFFKey is removed 0
Key is inserted Battery voltage
38 W/L Ignition switch ON or START ON — Battery voltage
39 L CAN-H — — —
40 P CAN-L — — —
47 SB Front door switch LH signal OFFON (open) 0
OFF (closed) 5
67 B Ground OFF — 0
70 W/B Battery power supply OFF — Battery voltage Te r m i n a l
No.Wire
colorItem Condition
Reference value (V)
(Approx.) Ignition
switchMeasurement method
SKIA5292E
Te r m i n a l
No.Wire
colorItem Condition
Reference value (V)
(Approx.) Ignition
switchMeasurement method
11 L C A N - H — — —
12 P CAN-L — — —
27 O/BSeat belt buckle pre-ten-
sioner assembly (seat belt
buckle switch) LH ONUnfastened (ON) 0
Fastened (OFF) Battery voltage
Unit Power source Fuse or fusible link No.
BCMBatteryf
Ignition switch ON or START 59

DI-50
WARNING CHIME
Revision: October 20052005 QX56
4. Touch “BUZZER” or “BCM”.
5. Select “DATA MONITOR” or “SELF-DIAG RESULTS”.
DATA MONITOR
Operation Procedure
1. Touch “BUZZER” on “SELECT TEST ITEM” screen.
2. Touch “DATA MONITOR” on “SELECT DIAG MODE” screen.
3. Touch “ALL SIGNALS” or “SELECTION FROM MENU” on “DATA MONITOR” screen.
4. If “SELECTION FROM MENU” is selected, touch the item you desire to monitor. If “ALL SIGNALS” is
selected, all control items are monitored.
5. Touch “START”.
6. During monitoring, touching “RECORD” can start recording the monitored item status.
Display Item List
ACTIVE TEST
Operation Procedure
1. Touch “BUZZER” on “SELECT TEST ITEM” screen.
2. Touch “ACTIVE TEST” on “SELECT DIAG MODE” screen.
3. Touch the item to be tested, and check the operation.
4. During the operation check, touching “OFF” deactivates the operation.
SKIA5788E
BCIA0031E
ALL SIGNALS Monitors main items.
SELECTION FROM MENU Selects and monitors items.
Monitored item Description
IGN ON SW Indicates [ON/OFF] condition of ignition switch.
KEY ON SW Indicates [ON/OFF] condition of key switch.
DOOR SW-DR Indicates [ON/OFF] condition of front door switch (driver side).
LIGHT SW 1ST Indicates [ON/OFF] condition of lighting switch.
BUCKLE SW Indicates [ON/OFF] condition of seat belt buckle switch LH.