Nissan Xterra. Manual — part 592
OCCUPANT CLASSIFICATION SYSTEM
SRC-11
< SYSTEM DESCRIPTION >
C
D
E
F
G
I
J
K
L
M
A
B
SRC
N
O
P
Passenger does not meet Occupant Classification System specifications for passenger air bag activation.
WHIA0195E
SRC-12
< SYSTEM DESCRIPTION >
PASSENGER SEAT BELT WARNING SYSTEM
PASSENGER SEAT BELT WARNING SYSTEM
System Diagram
INFOID:0000000009482982
System Description
INFOID:0000000009482983
The passenger seat belt warning system will remind the driver if the
driver or front passenger seat belt should be buckled by turning on
the seat belt warning light (1). The system works in conjunction with
the occupant classification system. Refer to
Passenger Seat Belt Warning System Operation
Component Parts Location
INFOID:0000000009482984
SRC-7, "SRS Component Parts Location"
ALHIA0028GB
ALHIA0043ZZ
Driver seat status
(Ignition switch ON)
Passenger seat status
Seat belt buckle switch
LH status
Seat belt buckle switch
RH status
Seat belt warning lamp
Seat occupied
Seat occupied
Buckled
Buckled
Off
Unbuckled
On
Seat unoccupied
—
Off
—
Unbuckled
On
ON BOARD DIAGNOSTIC (OBD) SYSTEM
SRC-13
< SYSTEM DESCRIPTION >
C
D
E
F
G
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A
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SRC
N
O
P
ON BOARD DIAGNOSTIC (OBD) SYSTEM
Trouble Diagnosis Introduction
INFOID:0000000009482985
CAUTION:
• Do not use electrical test equipment on any circuit related to the SRS unless instructed to do so in
this Service Manual. SRS wiring harnesses can be identified 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 using “AIR BAG” warning lamp and/or CONSULT.
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 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 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
Check that the following parts are in good order.
• Battery
• Fuses
• System component-to-harness connections
SRS Operation Check
INFOID:0000000009482986
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
X
X
ON-OFF operation
CONSULT
—
X
Monitoring
BF-1845D
SRC-14
< SYSTEM DESCRIPTION >
ON BOARD DIAGNOSTIC (OBD) SYSTEM
SRS Air bag warning lamp examples
DIAGNOSTIC PROCEDURE 2
1. Connect CONSULT.
2. Diagnostic code is displayed on "SELF-DIAG [CURRENT]".
If no malfunction is detected on "SELF-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 CON-
“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) or
SRC-15, "Trouble Diagnosis without
CONSULT"
(without CONSULT).
• Air bag is deployed.
• Seat belt pre-tensioner is deployed.
Go to COLLISION DIAGNOSIS
"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
.
• Air bag diagnosis sensor unit is mal-
functioning.
• Air bag warning lamp circuit is mal-
functioning.
Go to
.
SHIA0011E
SHIA0012E
SHIA0013E
SHIA0014E
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