Ins INFINITI QX56 2004 Factory Service Manual

WARNING CHIME
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Revision: August 20072004 QX56
Seat Belt Warning Chime Does Not OperateEKS007ER
1. CHECK WARNING CHIME OPERATION
1. With key removed from the ignition and the front door LH open, turn the lighting switch to 1st or 2nd posi-
tion.
2. Return lighting switch to OFF position, and insert key into ignition.
Does warning chime sound for both steps?
YES >> GO TO 2.
NO >> Go to DI-53, "
All Warning Chimes Do Not Operate" .
2. CHECK SEAT BELT WARNING LAMP OPERATION
Turn ignition switch ON. Buckle and unbuckle the driver seat belt while watching seat belt warning lamp.
OK or NG
OK >> Replace the BCM. Refer to BCS-19, "Removal and Installation of BCM" .
NG >> GO TO 3.
3. CHECK COMBINATION METER INPUT SIGNAL
1. Turn ignition switch ON.
2. Check voltage between combination meter harness connector
M24 terminal 27 (O/B) and ground.
OK or NG
OK >> Replace the combination meter. Refer to DI-25, "Removal and Installation of Combination Meter"
NG >> GO TO 4.
4. CHECK SEAT BELT BUCKLE SWITCH
1. Turn ignition switch OFF.
2. Disconnect seat belt buckle pre-tensioner assembly LH (seat
belt buckle switch) connector.
3. Check continuity between seat belt buckle pre-tensioner assem-
bly LH (seat belt buckle switch) terminals 1 and 2.
OK or NG
OK >> GO TO 5.
NG >> Replace the seat belt buckle pre-tensioner assembly LH (seat belt buckle switch).When seat belt is fastened : Warning lamp OFF
When seat belt is unfastened : Warning lamp ON
Te r m i n a l s
ConditionVoltage (V)
(Approx.) (+)
(–)
ConnectorTe r m i n a l
(Wire
color)
M24 27 (O/B) GroundSeat belt is fastened Battery voltage
Seat belt is unfastened 0
WKIA1821E
Terminals Condition Continuity
12Seat belt is fastened No
Seat belt is unfastened Yes
WKIA4163E

DI-64
REAR SONAR SYSTEM
Revision: August 20072004 QX56
Terminals And Reference Value For Sonar Control UnitEKS007EV
How to Proceed With Trouble DiagnosisEKS007EW
1. Confirm the symptom or customer complaint.
2. Understand operation description and function description. Refer to DI-60, "
System Description" .
3. Perform pre-diagnosis inspection. Refer to DI-65, "
Pre-diagnosis Inspection" .
4. Perform self-diagnosis. Refer to DI-65, "
Self-diagnosis Function" .
5. Perform the preliminary check. Refer to DI-67, "
Preliminary Check" .
6. Check symptom and repair or replace the cause of malfunction. Refer to DI-68, "
Symptom Chart" .
7. Does the rear sonar system operate properly? If so, go to 8. If not, go to 3.
8. Clear fault codes. Refer to DI-66, "
IDLING OR CLEARING FAULT CODES MODE" .
9. Inspection End.
TERMINAL
(COLOR)ITEMCONDITION
Reference value (V)
(Approx.) IGNITION
SWITCHOPERATION
3 (R) Sonar buzzer return ON — 0 - 12 (variable)
4 (BR/Y)Rear sonar system
OFF indicator outputONRear sonar system OFF
switch ON 0
OFF 12
5 (G/W) Reverse signal ONTransmission gear
selector leverR position 12
Transmission gear
selector leverNot R position 0
6 (B)Sonar control unit
ground —— 0
7 (L) Sonar buzzer drive
signalON — 12
8 (G/R)Sonar control unit
powerON — 12
9 (GR)Rear sonar sensor
signal - RH outerON

Rear sonar system OFF switch ON

Transmission gear selector lever in R
position

No obstacles12
10 (P)Rear sonar sensor
signal - LH outerON

Rear sonar system OFF switch ON

Transmission gear selector lever in R
position

No obstacles12
11 ( O )Rear sonar sensor
signal - LH innerON

Rear sonar system OFF switch ON

Transmission gear selector lever in R
position

Distance obstacles12
12 (LG)Rear sonar sensor
signal - RH innerON

Rear sonar system OFF switch ON

Transmission gear selector lever in R
position

Distance obstacles12
13 (LG)Rear sonar system
OFF switch signalONRear sonar system OFF
switchON 0
OFF 12
15 (Y)Rear sonar sensor
groundON — 0
16 (LG/B)Rear sonar sensor
powerON Ignition switch ON 12

REAR SONAR SYSTEM
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Revision: August 20072004 QX56
Pre-diagnosis InspectionEKS007EX
SENSOR STATUS CHECK

Check that the rear sonar sensor is properly aligned (bumper is not misaligned, no deformation in sensor
mounting area.

Check that snow, mud, or other foreign objects are not adhering to the rear sonar sensor.

Check that there is no deformation, scratches, or other damage to the rear sonar sensor.

Check that water has not accumulated in the rear sonar sensor.
CAUTION:
Use water, cotton swab, or other soft material for cleaning the sensor.
1. Check that there are no obstacles within each rear sonar sensor's detection range.
2. Check that there are no nearby ultrasound sources (such as the sounds of vehicle horns, motorcycle
engines, or truck air brakes).
3. Check that the vehicle is on a level surface.
Self-diagnosis FunctionEKS007EY
There are four modes of self-diagnosis; entering diagnostics, requesting number of fault codes, requesting
fault codes, and idling or clearing fault codes. These steps must be followed in order. Self-diagnosis can be
manually exited by turning the ignition switch OFF, or selecting reverse gear. Self-diagnosis will exit unless a
fault code request occurs before a message is repeated five times without acknowledgement.
ENTERING DIAGNOSTICS MODE
1. Turn ignition switch ON. Rear sonar system OFF switch indica-
tor lamp illuminates for three seconds and then turns off.
2. Immediately push rear sonar system OFF switch ten times
within five seconds.
3. The sonar buzzer will sound once and the rear sonar system
OFF indicator will flash once.
REQUESTING NUMBER OF FAULT CODES MODE
1. While in diagnostic mode, push rear sonar system OFF switch
once.
2. The sonar buzzer will sound once.
3. Rear sonar system OFF indicator will flash once and sonar
buzzer will sound once for each fault code detected.
4. There will be a four second pause.
5. The number of fault codes will repeat five times then pause.
NOTE:
Self-diagnosis will exit unless requesting fault codes occurs
before five repeats ends.
Detection range
Rear sonar sensors Approx. 1.8 m (5.9 ft.) maximum
LKIA0389E
LKIA0388E

REAR SONAR SYSTEM
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Revision: August 20072004 QX56
Preliminary CheckEKS007EZ
INSPECTION FOR POWER SUPPLY AND GROUND CIRCUIT
1. CHECK FUSES

Check for blown rear sonar system fuses.
Refer to DI-62, "
Wiring Diagram — SONAR —" .
OK or NG
OK >> GO TO 2.
NG >> If fuse is blown, be sure to eliminate cause of problem before installing new fuse. Refer to PG-4,
"POWER SUPPLY ROUTING CIRCUIT" .
2. CHECK POWER SUPPLY CIRCUIT
1. Disconnect sonar control unit connector.
2. Check voltage between sonar control unit connector B56 termi-
nal 8 (G/R) and ground.
OK or NG
OK >> GO TO 3.
NG >> Check harness for open between sonar control unit and fuse.
3. CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between sonar control unit B56 terminal 6 and
ground.
OK or NG
OK >> Inspection End.
NG >> Check harness ground circuit.
Unit Power Source Fuse
Sonar control unit ON or START 12
Terminals Ignition switch position
(+)
(-) ON or START
ConnectorTe r m i n a l
(Wire color)
B56 8 (G/R) Ground Battery voltage
WKIA1145E
Te r m i n a l s
Continuity (+)
(–)
ConnectorTe r m i n a l
(Wire color)
B56 6 (B) Ground Yes
WKIA1146E

DI-68
REAR SONAR SYSTEM
Revision: August 20072004 QX56
Symptom Chart EKS007F0
Symptom Repair order
When the rear sonar system OFF switch is OFF, the indicator
lamp does not light and the buzzer does not sound.1. Check rear sonar system OFF switch for malfunction. Refer to
DI-69, "
REAR SONAR SYSTEM OFF SWITCH" .
2. Check rear sonar system OFF switch ground circuit.
3. Check harness and connections between rear sonar system
OFF switch and sonar control unit.
4. Replace sonar control unit. Refer to DI-69, "
SONAR CON-
TROL UNIT" .
When the rear sonar system OFF switch is OFF, the indicator
lamp does not light but buzzer sounds.1. Check rear sonar system OFF indicator for malfunction. Refer
to DI-69, "
REAR SONAR SYSTEM OFF INDICATOR" .
2. Check harness and connections between rear sonar system
OFF indicator and sonar control unit.
3. Replace sonar control unit. Refer to DI-69, "
SONAR CON-
TROL UNIT" .
When the rear sonar system OFF switch is OFF, the sonar
buzzer does not sound but indicator lamp illuminates.1. Check sonar buzzer. Refer to DI-69, "
SONAR BUZZER" .
2. Check harness and connections between sonar buzzer and
sonar control unit.
3. Replace sonar control unit. Refer to: DI-69, "
SONAR CON-
TROL UNIT" .
When rear sonar system OFF switch is ON, the rear sonar sys-
tem OFF indicator lamp lights up and the sonar buzzer sounds
intermittently (for about 4 seconds).1. Check harness between rear sonar sensors and sonar control
unit for an open condition.
2. Check rear sonar sensors for malfunction.
3. Replace sonar control unit. Refer to DI-69, "
SONAR CON-
TROL UNIT" .
The rear sonar system operates with the rear sonar system OFF
switch OFF.1. Check rear sonar system OFF switch for malfunction. Refer to
DI-69, "
REAR SONAR SYSTEM OFF SWITCH" .
2. Check rear sonar system OFF switch ground circuit.
3. Check harness and connections between rear sonar system
OFF switch and sonar control unit.
4. Replace sonar control unit. Refer to DI-69, "
SONAR CON-
TROL UNIT" .
When the transmission gear selector lever is in the R position
and the rear sonar system OFF switch is OFF, the sonar system
does not operate.1. Check for PNP switch failure. Refer to AT- 9 3 , "
SELF-DIAG-
NOSTIC RESULT MODE" .
2. Check harness and connections between sonar control unit
and PNP/reverse lamp circuits.
3. Replace sonar control unit. Refer to DI-69, "
SONAR CON-
TROL UNIT" .
When the rear sonar system OFF switch is OFF, the indicator
lamp lights up and buzzer sounds although there is no obstacle
within the detection range.1. Check for adhesion of snow, mud, or other foreign objects to
rear sonar sensors; dew condensation; etc. Refer to DI-65,
"Pre-diagnosis Inspection" .
2. Check that the rear sonar sensor is properly aligned (bumper
is not misaligned, no deformation in sensor mounting area
3. Check harness and connections between rear sonar sensors
and sonar control unit.
4. Check rear sonar sensors for malfunction.
5. Replace sonar control unit. Refer to DI-69, "
SONAR CON-
TROL UNIT" .
The rear sonar sensors do not operate according to the distance
between each sensor and the obstacle. (There is a large error in
the obstacle detection distance.1. Check rear sonar sensors for malfunction.
2. Replace sonar control unit. Refer to DI-69, "
SONAR CON-
TROL UNIT" .
3. Check for adhesion of snow, mud, or other foreign objects to
rear sonar sensors; dew condensation; etc. Refer to DI-65,
"Pre-diagnosis Inspection" .
4. Check that the rear sonar sensor is properly aligned (bumper
is not misaligned, no deformation in sensor mounting area

REAR SONAR SYSTEM
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Revision: August 20072004 QX56
Component InspectionEKS007F1
SONAR BUZZER
1. Disconnect the sonar buzzer connector.
2. Check continuity between buzzer connector M117 terminal (+)
and terminal (-)
REAR SONAR SYSTEM OFF SWITCH
Disconnect the rear sonar system OFF switch connector M116.
Check continuity between the following terminals.
REAR SONAR SYSTEM OFF INDICATOR
Disconnect the rear sonar system OFF switch connector M116, and
apply battery voltage (approx. 12V) to terminal 5. Check the rear
sonar system OFF indicator operation when terminal 6 is connected
to battery ground.
Removal and Installation of Rear Sonar SystemEKS007F2
REAR SONAR SENSORS
Refer to EI-15, "Removal and Installation" for rear sonar sensor removal and installation procedures.
SONAR CONTROL UNIT
REMOVAL
1. Remove luggage side finisher lower LH. Refer to EI-39, "LUGGAGE FLOOR TRIM" .
2. Disconnect electrical connector. Refer to DI-59, "
Component Parts and Harness Connector Location" .
3. Remove sonar control unit screws.
4. Remove sonar control unit.
INSTALLATION
Installation is in the reverse order of removal.(+) - (-) : Continuity should exist
WKIA2024E
Rear sonar system OFF
switch Terminal to be inspected Continuity
ON
1 - 2Ye s
OFF No
WKIA2025E
Terminal to be
inspectedCondition Operation
Rear sonar sys-
tem OFF switch5 Approx. 12V Rear sonar
system OFF
indicator lights 6Ground
WKIA2026E

CLOCK
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Revision: August 20072004 QX56
Removal and Installation of ClockEKS007R3
REMOVAL
1. Remove cluster lid C. Refer to IP-10, "INSTRUMENT PANEL
ASSEMBLY" .
2. Remove screws (3), and remove clock from cluster lid C.
INSTALLATION
Installation is in the reverse order of removal.
LKIA0477E

REAR VIEW MONITOR
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Revision: August 20072004 QX56
CONSULT-II Function (REARVIEW CAMERA)EKS007R9
CONSULT-II can display each diagnostic item using the diagnostic test modes shown following.
CONSULT-II BASIC OPERATION
CAUTION:
If CONSULT-II is used with no connection of CONSULT-II CONVERTER, malfunctions might be
detected in self-diagnosis depending on control unit which carries out CAN communication.
1. With the ignition switch OFF, connect “CONSULT-II” and “CON-
SULT-II CONVERTER” to the data link connector, then turn igni-
tion switch ON.
2. Touch “START (NISSAN BASED VHCL)”.
3. Touch “REARVIEW CAMERA” on “SELECT SYSTEM” screen. If
“REARVIEW CAMERA” is not indicated, go to GI-39, "
CON-
SULT-II Data Link Connector (DLC) Circuit" .
REARVIEW CAMERA
diagnostic modeDescription
WORK SUPPORTSupports inspection and adjustments. Commands are transmitted to the rearview camera control unit
for setting the status suitable for required operation, input/output signals are received from the rear-
view camera control unit and received data is displayed.
DATA MONITOR Displays rearview camera control unit input/output data in real time.
ECU PART NUMBER Rearview camera control unit part number can be read.
BBIA0369E
BCIA0029E
BCIA0030E

REAR VIEW MONITOR
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Revision: August 20072004 QX56
Power Supply and Ground Circuit InspectionEKS007RB
1. CHECK FUSES
Check for blown rear view camera system fuses.
OK or NG
OK >> GO TO 2.
NG >> If fuse is blown, be sure to eliminate cause of problem before installing new fuse. Refer to PG-4,
"POWER SUPPLY ROUTING CIRCUIT" .
2. CHECK POWER SUPPLY CIRCUIT
1. Disconnect rear view camera control unit connector.
2. Check voltage between rear view camera control unit and
ground.
OK or NG
OK >> GO TO 3.
NG >> Check harness for open between rear view camera control unit and fuse.
3. CHECK REAR VIEW CAMERA CONTROL UNIT GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between rear view camera control unit harness
connector B73 terminal 3 (B) and ground.
OK or NG
OK >> GO TO 4.
NG >> Repair harness or connector.
4. CHECK REAR VIEW CAMERA GROUND CIRCUIT
1. Disconnect rear view camera connector.
2. Check continuity between rear view camera harness connector
D504 terminal 2 (B) and ground.
OK or NG
OK >> Inspection End.
NG >> Repair harness or connector.
Unit Power source Fuse No.
Rear view camera control unitBattery 31
Ignition switch ACC or ON 4
Te r m i n a l s
OFF ACC (+)
(–)
ConnectorTe r m i n a l
(Wire color)
B731 (Y) Ground Battery voltage Battery voltage
2 (V) Ground 0V Battery voltage
WKIA2027E
Continuity should exist.
SKIA5081E
Continuity should exist.
SKIA5082E

DI-84
REAR VIEW MONITOR
Revision: August 20072004 QX56
Rear View Is Not Displayed With The A/T Selector Lever In R PositionEKS007RC
1. BACK-UP LAMP INSPECTION
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-106, "
BACK-UP LAMP" .
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 (G/W) 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 (BR) and ground.
OK or NG
OK >> GO TO 5.
NG >> GO TO 4.
SKIA7147E
Battery voltage should exist.
SKIA5086E
Voltage : Approx. 5V
SKIA7148E