Air INFINITI QX56 2004 Factory Service Manual

WARNING LAMPS
DI-39
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Revision: August 20072004 QX56
4. CHECK OIL PRESSURE SENSOR POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect combination meter connector M24.
3. Check continuity between combination meter harness connector M24 terminal 22 (GR/L) and oil pressure
sensor harness connector F4 terminal 1 (GR/L).
4. Check continuity between combination meter harness connector
M24 terminal 22 (GR/L) and ground.
OK or NG
OK >> GO TO 5.
NG >> Repair harness or connector.
5. CHECK OIL PRESSURE SENSOR SIGNAL CIRCUIT
1. Check continuity between combination meter harness connector M24 terminal 20 (Y) and oil pressure
sensor harness connector F4 terminal 2 (Y).
2. Check continuity between combination meter harness connector
M24 terminal 20 (Y) and ground.
OK or NG
OK >> GO TO 6.
NG >> Repair harness or connector.
6. CHECK OIL PRESSURE SENSOR GROUND CIRCUIT
Check continuity between combination meter harness connector
M24 terminal 16 (B/P) and ground.
OK or NG
OK >> Replace oil pressure sensor.
NG >> Repair harness or connector.Continuity should exist.
Continuity should not exist.
WKIA1835E
Continuity should exist.
Continuity should not exist.
WKIA1836E
Continuity should not exist.
WKIA2685E

WARNING CHIME
DI-49
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Revision: August 20072004 QX56
Terminals and Reference Value for Combination MeterEKS007EJ
How to Proceed With Trouble DiagnosisEKS007EK
1. Confirm the symptom or customer complaint.
2. Understand operation description and function description. Refer to DI-44, "
System Description" .
3. Perform the preliminary check. Refer to DI-49, "
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 CheckEKS007EL
INSPECTION FOR POWER SUPPLY AND GROUND CIRCUIT
1. CHECK FUSE AND FUSIBLE LINK
Check for blown BCM fuse or fusible link.
Refer to DI-46, "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 W CAN-H — — —
40 R 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 W C A N - H — — —
12 R CAN-L — — —
27 O/B 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: August 20072004 QX56
2. CHECK POWER SUPPLY CIRCUIT
1. Disconnect BCM connector.
2. Check voltage between BCM harness connector terminals and
ground.
OK or NG
OK >> GO TO 3.
NG >> Check harness for open between BCM and fuse.
3. CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between BCM harness connector M20 terminal
67 (B) and ground.
OK or NG
OK >> Inspection End.
NG >> Repair harness or connector.
Terminals Ignition switch position
(+)
(–) OFF ON
ConnectorTerminal (Wire
color)
M20 70 (W/B)
GroundBattery volt-
ageBattery volt-
age
M18 38 (W/L) 0VBattery volt-
age
WKIA2072E
Continuity should exist.
WKIA2073E

DI-54
WARNING CHIME
Revision: August 20072004 QX56
2. CHECK FRONT DOOR SWITCH LH CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM connector and front door switch LH connector.
3. Check continuity between BCM harness connector M19 terminal
47 (SB) and front door switch LH harness connector B8 terminal
2 (SB).
4. Check continuity between BCM harness connector M19 terminal
47 (SB) and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair harness or connector.
3. CHECK FRONT DOOR SWITCH LH
Check continuity between front door switch LH terminal 2 and
exposed metal of switch while pressing and releasing switch.
OK or NG
OK >> Replace the BCM. Refer to BCS-19, "Removal and
Installation of BCM" .
NG >> Replace the front door switch LH.
Key Warning Chime Does Not OperateEKS007EP
1. CHECK FUSE
Check if the key switch fuse [No. 19, located in the fuse block (J/B)] is blown. Refer to DI-46, "
Wiring Diagram
— CHIME —" .
Is the fuse blown?
YES >> Replace the fuse. Be sure to repair the cause of malfunction before installing new fuse.
NO >> GO TO 2.
2. CHECK WARNING CHIME OPERATION
With key removed from the ignition key cylinder and the front door LH open, turn the lighting switch to 1st or
2nd position.
Does warning chime sound?
YES >> GO TO 3.
NO >> Go to DI-53, "
All Warning Chimes Do Not Operate" or DI-53, "Key Warning Chime and Light
Warning Chime Do Not Operate (Seat Belt Warning Chime Does Operate)" . Continuity should exist.
Continuity should not exist.
WKIA1516E
When front door switch
LH is released: Continuity should exist.
When front door switch
LH is pressed: Continuity should not
exist.
WKIA2023E

DI-56
WARNING CHIME
Revision: August 20072004 QX56
5. CHECK KEY SWITCH CIRCUIT
1. Disconnect BCM connector.
2. Check continuity between BCM harness connector M18 terminal
37 (B/R) and key switch and key lock solenoid harness connec-
tor M27 terminal 4 (B/R).
3. Check continuity between BCM harness connector M18 terminal
37 (B/R) and ground.
OK or NG
OK >> GO TO 6.
NG >> Repair harness or connector.
6. CHECK KEY SWITCH POWER SUPPLY CIRCUIT
Check voltage between key switch and key lock solenoid harness
connector M27 terminal 3 (Y/R) and ground.
OK or NG
OK >> Replace the BCM. Refer to BCS-19, "Removal and
Installation of BCM" .
NG >> Check harness for open or short between fuse and key
switch and key lock solenoid.
Light Warning Chime Does Not OperateEKS007EQ
1. CHECK WARNING CHIME OPERATION
Check key warning chime and seat belt warning chime functions.
Do key warning chime and seat belt warning chime sound?
YES >> GO TO 2.
NO >> Go to DI-53, "
All Warning Chimes Do Not Operate" .
2. CHECK BCM INPUT SIGNAL
With CONSULT-II
1. Select "BCM".
2. With "DATA MONITOR" of "BUZZER", confirm "LIGHT SW 1ST"
status changes when the lighting switch is moved from ON (1st
position) to OFF.
Without CONSULT-II
Check combination switch. Refer to LT-98, "
Combination Switch
Reading Function" .
OK or NG
OK >> Replace the BCM. Refer to BCS-19, "Removal and Installation of BCM" .
NG >> Check lighting switch. Refer to LT-98, "
Combination Switch Reading Function" . Continuity should exist.
Continuity should not exist.
WKIA2074E
Battery voltage should exist.
WKIA2075E
Lighting switch ON (1st position) : LIGHT SW 1ST ON
Lighting switch OFF : LIGHT SW 1ST OFF
WKIA1877E

DI-58
WARNING CHIME
Revision: August 20072004 QX56
5. CHECK SEAT BELT BUCKLE SWITCH CIRCUIT
1. Disconnect combination meter connector.
2. Check continuity between combination meter harness connector
M24 terminal 27 (O/B) and seat belt buckle pre-tensioner
assembly LH (seat belt buckle switch) harness connector B74
terminal 1 (O/B).
3. Check continuity between combination meter harness connector M24 terminal 27 (O/B) and ground.
OK or NG
OK >> Check seat belt buckle pre-tensioner assembly LH (seat belt buckle switch) ground circuit.
NG >> Repair harness or connector.
AB
Continuity
Connector Terminal Connector Terminal
Combina-
tion meter:
M2427Seat belt
buckle pre-
tensioner
assembly LH
(seat belt
buckle
switch): B741Yes
B
GroundContinuity
Connector Terminal
Combina-
tion meter:
M2427 No
WKIA4164E

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
DI-65
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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

DI-66
REAR SONAR SYSTEM
Revision: August 20072004 QX56
REQUESTING FAULT CODES MODE
1. While in "requesting number of fault codes" mode, push rear
sonar system OFF switch once.
2. The sonar buzzer will sound once.
3. Rear sonar system OFF indicator will flash and sonar buzzer will
sound the first digit of the fault code followed by a one second
pause.
4. Rear sonar system OFF indicator will flash and sonar buzzer will
sound the second digit of the fault code followed by a four sec-
ond pause.
5. The fault codes will repeat five times then pause.
NOTE:
Requesting fault codes will exit unless the fault code is acknowledged before five repeats ends.
The fault code is acknowledged by pushing the rear sonar system OFF switch once (the sonar buzzer
may sound). When all fault codes have been indicated, idle mode will be entered. See the following table
for fault code identification.
IDLING OR CLEARING FAULT CODES MODE
NOTE:
While in idle mode, self-diagnosis will automatically exit if no activity occurs for thirty seconds.
1. Push and hold rear sonar system OFF switch for three seconds
to reset time-out counter.
2. Push and hold rear sonar system OFF switch for three seconds
to clear codes.
Fault Code Malfunction Page Reference
1 1Rear sonar sensor LH
outer
Check harness for open
or short. If NG repair or
replace harness. If OK
replace sensor. Refer to
DI-69, "
REAR SONAR
SENSORS" . 1 2Rear sonar sensor LH
inner
1 3Rear sonar sensor RH
inner
1 4Rear sonar sensor RH
outer
2 1 Sonar buzzerDI-69, "
SONAR BUZZER"
2 2Rear sonar system OFF
indicatorDI-69, "
REAR SONAR
SYSTEM OFF INDICA-
TOR"
2 3Rear sonar system OFF
switchDI-69, "REAR SONAR
SYSTEM OFF SWITCH"
2 4 Sonar control unitReplace sonar control
unit. Refer to DI-69, "SONAR CONTROL
UNIT"
LKIA0390E
LKIA0391E

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