2009 INFINITI QX56 air condition

SN
INSPECTION AND ADJUSTMENTSN-5
< BASIC INSPECTION >
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INSPECTION AND ADJUSTMENT
Preliminary CheckINFOID:0000000003776738
DESCRIPTION
The purpose of the sonar sensor preliminary check is to confirm that there are no outside factors affecting the
sonar system.
CONDITIONS
• Ignition switch ON
• No obstructions within 3.0 m (10 ft.) of sonar sensors
SONAR SENSOR STATUS CHECK
• Check that the sonar sensors are properly aligned (no deformation in sensor mounting areas).
• Check that snow, mud or other foreign obj ects are not adhering to the sonar sensors.
• Check that there is no deformation, scratc hes or other damage to the sonar sensors.
• Check that water has not accu mulated in the sonar sensors.
CAUTION:
Use water, cotton swab, or other soft material for cleaning the sensors.
1. Check that there are no obstacles wit hin each 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.
Sonar sensors Detection range
Front Approx. 1.0 m (3 ft.) maximum
Rear Approx. 1.8 m (5.9 ft.) maximum
Revision: December 20092009 QX56

SN-20
< COMPONENT DIAGNOSIS >
SONAR SYSTEM OFF SWITCH CIRCUIT INSPECTION
3. Check continuity between sonar control unit harness connector(A) and sonar system OFF switch harness connector (B).
4. Check continuity between sonar system OFF switch harness connector and ground.
Are the inspection results normal?
YES >> Inspection End.
NO >> Repair harness or connector.
Component InspectionINFOID:0000000004173812
SONAR SYSTEM OFF SWITCH
1. Disconnect the sonar system OFF switch connector.
2. Check continuity between the following switch terminals.
SONAR SYSTEM OFF INDICATOR
1. Disconnect the sonar system OFF switch connector.
2. Apply battery voltage to switch terminal 5.
3. Check the sonar system OFF indicator operation when switch terminal 6 is connected to battery ground.
Connector Terminal Connector Terminal Continuity
B56 (A) 5
M116 (B) 5
Ye s
11 1
ALNIA1087ZZ
ConnectorTerminalContinuity
M116 1, 5
Ground No
2, 6 Yes
ALNIA1088ZZ
Sonar system OFF switch Terminals Continuity
Depressed 1 - 2Ye s
Released No
AWNIA0181ZZ
Terminals Condition Operation
Sonar system
OFF switch 5
Battery voltage
Indicator ON
6G ro u nd
AWNIA0182ZZ
Revision: December 20092009 QX56

SN
SONAR SYSTEM SYMPTOMSSN-45
< SYMPTOM DIAGNOSIS >
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SYMPTOM DIAGNOSIS
SONAR SYSTEM SYMPTOMS
Symptom TableINFOID:0000000003776759
Symptom Repair order
When the sonar system is OFF, the OFF indicator does not light
and the sonar buzzer does not sound. 1. Check sonar system OFF switch. Refer to
SN-20, "
Compo-
nent Inspection" or SN-19, "Diagnosis Procedure (With
Front and Rear Sonar System)".
2. Check harness and connections for sonar system OFF
switch.
3. Replace sonar control unit. Refer to SN-50, "
Removal and
Installation".
When the sonar system is OFF, the OFF indicator lamp does not
light but the sonar buzzer does sound. 1. Check sonar system OFF switch. Refer to
SN-19, "
Diagno-
sis Procedure (With Rear Sonar System)" or SN-19, "Diag-
nosis Procedure (With Front and Rear Sonar System)".
2. Check harness and connections for sonar system OFF indi- cator lamp.
3. Replace sonar control unit.
When the sonar system is OFF, the sonar buzzer does not sound
but the OFF indicator lamp lights. 1. Check sonar buzzer. Refer to
SN-18, "
Component Inspec-
tion" or SN-17, "Diagnosis Procedure (With Front and Rear
Sonar System)".
2. Check harness and connections between sonar buzzer and sonar control unit.
3. Replace sonar control unit.
When sonar system is ON, the sonar system OFF indicator lamp
lights up and the sonar buzzer sounds intermittently (for about 4
seconds). (Rear sonar system only) 1. Check harnesses between sonar sensors and sonar control
unit for an open condition.
2. Check sonar sensors. Refer to SN-5, "
Preliminary Check".
3. Replace sonar control unit.
The sonar system still operates when the sonar system is OFF. 1. Replace sonar control unit.
When the transmission gear selector lever is in the R position and
the sonar system is ON, the rear sonar system does not operate. 1. Check transmission range switch. Refer to
TM-44, "
Diagno-
sis Procedure".
2. Check back-up lamp relay.
3. Check related harness and connections for back-up lamp re- lay.
4. Replace sonar control unit.
When the transmission gear selector lever is in a forward drive
gear and the sonar system is ON, the front sonar system does not
operate. (With front and rear sonar system only) 1. Check harness and connections between sonar control unit
and combination meter.
2. Replace sonar control unit.
Sonar system OFF indicator lamp lights up and buzzer sounds al-
though there are no obstacles within the detection range. 1. Check sonar sensors.
2. Check harness and connections between sonar sensors
and sonar control unit.
3. Replace sonar control unit.
The sonar sensors do not detect objects in the detectable range. 1. Check sonar sensors.
2. Replace sonar control unit.
Revision: December 20092009 QX56

SRC-10
< FUNCTION DIAGNOSIS >
OCCUPANT CLASSIFICATION SYSTEM
OCCUPANT CLASSIFICATION SYSTEM
System DiagramINFOID:0000000003775179
Occupant Classification System (OCS)INFOID:0000000003775180
The occupant classification system (OCS) identifies different size occupants, out of position occupants, and
detects if child seat is present in the front passenger seat. The OCS receives inputs from the occupant classi-
fication sensor (located inside the passenger seat cushion assembly) and belt tension sensor (part of the pas-
senger front seat belt assembly and located at the belt anchor location). Depending on classification of the
passenger, the OCS sends a signal to the air bag diagnos is sensor unit. The air bag diagnosis sensor unit
uses this signal and the seat belt buckle switch RH signal to determine deployment or non deployment of the
passenger front air bag in the event of a collision. Depending on the signals received, the air bag diagnosis
sensor unit can disable the passenger front air bag completely.
NOTE:
In case of customer concern, CONSULT-III can be used to confirm the passenger air bag status (readiness).
Passenger Air Bag Status Conditions
NOTE:
ALHIA0042GB
Front Passenger Seat
(Condition) PASS AIR BAG OFF Indicator
(Status) Passenger Air Bag Status
(Readiness) CONSULT-III Display
Seat occupied OFF Active (enabled)ON
Seat occupied
NOTEON Deactivated (disabled) OFF
Seat empty OFF Deactivated (disabled) OFF
Revision: December 20092009 QX56

ON BOARD DIAGNOSTIC (OBD) SYSTEMSRC-13
< FUNCTION DIAGNOSIS >
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ON BOARD DIAGNOSTIC (OBD) SYSTEM
Trouble Diagnosis IntroductionINFOID:0000000003775184
CAUTION:
• Do not use electrical test equipment on any circui t related to the SRS unless instructed to do so in
this Service Manual. SRS wiring harnesses can be id entified by yellow and/or orange harness con-
nectors.
• Do not attempt to repair, splice or modify SRS wiring harnesses. If a harness is damaged, replace it
with a new one.
• Keep ground connections clean.
DIAGNOSIS FUNCTION
The SRS self-diagnosis results can be read by usi ng “AIR BAG” warning lamp and/or CONSULT-III.
The User mode is exclusively prepared for the customer (driver). This mode warns the driver of a system mal-
function through the operation of the “AIR BAG” warning lamp.
The Diagnosis mode allows the technician to locate and inspect the malfunctioning part.
The mode applications for the “AIR BAG” warning lamp and CONSULT-III are as follows:
HOW TO PERFORM TROUBLE DIAGNOSES FOR QUICK AND ACCURATE REPAIR
A good understanding of the malfunction conditions can make troubleshooting faster and more accurate.
In general, each customer feels differently about a malf unction. It is important to fully understand the symp-
toms or conditions for a customer complaint.
Information From Customer
WHAT - Vehicle model
WHEN - Date, Frequencies
WHERE - Road conditions
HOW - Operating conditions, Symptoms
Preliminary Check
Check that the following parts are in good order.
•Battery
•Fuse
• System component-to-harness connections
SRS Operation CheckINFOID:0000000003775185
DIAGNOSTIC PROCEDURE 1
Checking SRS Operation Using “AIR BAG” Warning Lamp—User Mode
1. Turn the ignition switch from OFF to ON, and check that the air bag warning lamp blinks.
2. Compare the SRS air bag warning lamp blinking pattern with the examples.
User mode Diagnosis mode Display type
“AIR BAG” warning lamp XXON-OFF operation
CONSULT-III —XMonitoring
BF-1845D
Revision: December 20092009 QX56

SRC-14
< FUNCTION DIAGNOSIS >
ON BOARD DIAGNOSTIC (OBD) SYSTEM
SRS Air bag warning lamp examples
DIAGNOSTIC PROCEDURE 2
1. Connect CONSULT-III.
2. Diagnostic code is displayed on "SELF-DIAG [CURRENT]".If no malfunction is detected on "SEL F-DIAG [CURRENT]", but malfunction is detected in "SRS Operation
Check" using the "AIR BAG" warning lamp, the following cases may exist:
• "SELF-DIAG [PAST]" memory might not be erased.
• The SRS system malfunctions intermittently.
Perform DIAGNOSTIC PROCEDURE 4. Refer to SRC-15, "
Self-Diagnosis Function (Without CONSULT-
III)".
“AIR BAG” warning lamp (User mode)SRS condition Reference item
• No malfunction is detected.
• No further action is necessary. —
The system is malfunctioning and
needs to be repaired as indicated. Go to DIAGNOSTIC PROCEDURE
2 that follows (with CONSULT-III) or
SRC-15, "
Trouble Diagnosis without
CONSULT-III" (without CONSULT-
III).
• Air bag is deployed.
• Seat belt pre-tensioner is deployed. Go to COLLISION DIAGNOSIS
SR-
20, "For Frontal Collision" or SR-22,
"For Side and Rollover Collision".
• Air bag diagnosis sensor unit is mal- functioning.
• Air bag power supply circuit is mal- functioning.
• SRS air bag warning lamp circuit is
malfunctioning. Go to SRC-90, "
"AIR BAG" Warning
Lamp Does Not Turn Off".
• Air bag diagnosis sensor unit is mal- functioning.
• Air bag warning lamp circuit is mal- functioning. Go to SRC-90, "
"AIR BAG" Warning
Lamp Does Not Turn On".
SHIA0011E
SHIA0012E
SHIA0013E
SHIA0014E
Revision: December 20092009 QX56

B1049 – B1052, B1054 – B1057 DRIVER AIRBAG MODULE
SRC-17
< COMPONENT DIAGNOSIS >
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COMPONENT DIAGNOSIS
B1049 – B1052, B1054 – B1057 DRIVER AIRBAG MODULE
DescriptionINFOID:0000000003775189
DTC B1049 – B1052, B1054 – B1057 DRIVER AIRBAG MODULE
The driver air bag module is dual stage and wired to the air bag diagnosis sensor unit through the spiral cable.
The air bag diagnosis sensor unit will monitor for opens and shorts in detected lines to the driver air bag mod-
ule including the spiral cable.
PA R T L O C AT I O N
Refer to SRC-7, "SRS Component Parts Location".
DTC LogicINFOID:0000000004221421
DTC DETECTION LOGIC
With CONSULT-lll
Without CONSULT-lll
DTC CONFIRMATION PROCEDURE (With CONSULT-lll)
CONSULT-III name DTC DTC detecting condition Repair order
DRIVER AIRBAG MODULE [OPEN] B1049
Driver air bag module circuit (DR1) is open
(including the spiral cable). 1. Visually check the wiring harness connection.
2. Replace the harness if it has visible damage.
3. Replace the driver air bag module.
4. Replace the spiral cable.
5. Replace the air bag diagnosis sensor unit.
6. Replace the related harness.
B1054
Driver air bag module circuit (DR2) is open
(including the spiral cable).
DRIVER AIRBAG MODULE [VB-SHORT] B1050
Driver air bag module circuit (DR1) is
shorted to a power supply circuit
(including the spiral cable).
B1055 Driver air bag module circuit (DR2) is
shorted to a power supply circuit
(including the spiral cable).
DRIVER AIRBAG MODULE [GND-SHORT] B1051
Driver air bag module circuit (DR1) is
shorted to ground
(including the spiral cable).
B1056 Driver air bag module circuit (DR2) is
shorted to ground
(including the spiral cable).
DRIVER AIRBAG MODULE [SHORT] B1052
Driver air bag module circuits (DR1) are
shorted to each other
(including the spiral cable).
B1057 Driver air bag module circuits (DR2) are
shorted to each other
(including the spiral cable).
WHIA0260E
Revision: December 20092009 QX56

SRC-20
< COMPONENT DIAGNOSIS >
B1065 – B1068, B1070 – B1073 PASSENGER AIRBAG MODULE
B1065 – B1068, B1070 – B1073 PASSENGER AIRBAG MODULE
DescriptionINFOID:0000000003775192
DTC B1065 – B1068, B1070 – B1073 PASSENGER AIR BAG MODULE
The passenger air bag module is dual stage and wired to the air bag diagnosis sensor unit. The air bag diag-
nosis sensor unit will monitor for opens and shorts in detected lines to the passenger air bag module.
PA R T L O C AT I O N
Refer to SRC-7, "SRS Component Parts Location".
DTC LogicINFOID:0000000004221422
DTC DETECTION LOGIC
With CONSULT-lll
Without CONSULT-lll
DTC CONFIRMATION PROCEDURE (With CONSULT-lll)
1.INSPECTION START
Turn ignition switch ON.
>> GO TO 2.
2.CHECK SELF-DIAG RESULT
Check for the DTC on CONSULT-lll.
CONSULT-III name DTC DTC detecting condition Repair order
ASSIST A/B MODULE [OPEN] B1065
Front passenger air bag module circuit
(AS1) is open. 1. Visually check the wiring harness connection.
2. Replace the harness if it has visible damage.
3. Replace the front passenger air bag module.
4. Replace the air bag diagnosis sensor unit.
5. Replace the related harness.
B1070
Front passenger air bag module circuit
(AS2) is open.
ASSIST A/B MODULE [VB-SHORT] B1066
Front passenger air bag module circuit
(AS1) is shorted to a power supply circuit.
B1071 Front passenger air bag module circuit
(AS2) is shorted to a power supply circuit.
ASSIST A/B MODULE [GND-SHORT] B1067
Front passenger air bag module circuit
(AS1) is shorted to ground.
B1072 Front passenger air bag module circuit
(AS2) is shorted to ground.
ASSIST A/B MODULE [SHORT] B1068
Front passenger air bag module circuits
(AS1) are shorted to each other.
B1073 Front passenger air bag module circuits
(AS2) are shorted to each other.
WHIA0261E
Revision: December 20092009 QX56