Infiniti M35/M45 Y50. Manual — part 1098
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
SRS-7
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SRS
Occupant Classification System (OCS)
NHS0008W
The occupant classification system identifies different size occupants, out of position occupants, and detects if
child seat is present in the front passenger seat. The occupant classification system receives inputs from the
occupant classification sensor (located inside the passenger seat cushion assembly) and belt tension sensor
(part of the passenger front seat belt assembly and located at the belt anchor location). Depending on classifi-
cation of passenger, the occupant classification system sends a signal to the diagnosis sensor unit. The diag-
nosis sensor unit uses this signal to determine full, partial, or non deployment of passenger front air bag in the
event of a collision. Depending on the signal received, the diagnosis sensor unit can disable the passenger
front air bag completely.
NOTE:
In case of customer concern, CONSULT-ll can be used to confirm the passenger air bag status (readiness).
Passenger Air Bag Status Condition
NHS0008X
NOTE:
Passenger does not meet Ocuupant Classification System specifications for passenger air bag activation.
Component Parts of Occupant Classification System
NHS0008Y
Front Passenger Seat
(Condition)
PASS AIR BAG OFF Indicator
(Status)
Passenger Air Bag Status
(Readiness)
CONSULT-ll Display
Seat occupied
OFF
Active (enabled)
ON
seat occupiedNOTE
ON
Deactivated (disabled)
OFF
Seat empty
OFF
Deactivated (disabled)
OFF
PHIA1177E
1.
Occupant classification system con-
trol unit
2.
Belt tension sensor
3.
Seat pressure sensor
4.
Bladder
5.
Front passenger air bag OFF indica-
tor (Cutoff telltaile)
SRS-8
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
Passenger Seatbelt Warning System
NHS0009R
SYSTEM DESCRIPTION
This system warns when passenger seatbelt is not fasten.
This system is composed of the following items.
●
Seatbelt warning lamp.
●
Seatbelt buckle switch (passenger side).
●
Air bag diagnosis sensor unit.
●
Occupant classification system.
Seatbelt warning lamp is used for both driver seatbelt warning and passenger seatbelt warning.
Seatbelt warning lamp turns ON when all conditions below are met.
●
Driver seatbelt is fastened.
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Occupant is on passenger seat.
●
Passenger seatbelt is not fasten.
TROUBLE DIAGNOSIS
SRS-9
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SRS
TROUBLE DIAGNOSIS
PFP:00004
Trouble Diagnosis Introduction
NHS00090
CAUTION:
●
Do not use electrical test equipment on any circuit related to the SRS unless instructed in this Ser-
vice Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or har-
ness connectors.
●
Do not repair, splice or modify the SRS wiring harness. If the harness is damaged, replace it with a
new one.
●
Keep ground portion clean.
DIAGNOSIS FUNCTION
The SRS self-diagnosis results can be read by using “AIR BAG” warning lamp and/or CONSULT-II.
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-II are as follows:
HOW TO PERFORM TROUBLE DIAGNOSIS 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 malfunction. 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
Make sure the following parts are in good order.
●
Battery (Refer to
.)
●
Fuse (Refer to
SRS-13, "Wiring Diagram — SRS —"
●
System component-to-harness connections
User mode
Diagnosis mode
Display type
“AIR BAG” warning lamp
X
X
ON-OFF operation
CONSULT-II
—
X
Monitoring
SRS-10
TROUBLE DIAGNOSIS
WORK FLOW
*1:
*2:
*3:
SRS-22, "DIAGNOSTIC PROCE-
DURE 2"
*4:
SRS-35, "DIAGNOSTIC PROCE-
DURE 6"
*5:
SRS-27, "DIAGNOSTIC PROCE-
DURE 3"
.
*6:
SRS-35, "DIAGNOSTIC PROCE-
DURE 6"
PHIA0217E
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