Nissan Titan A60. Instruction — part 874
SRC-12
< SYSTEM DESCRIPTION >
PASSENGER SEAT BELT WARNING SYSTEM
PASSENGER SEAT BELT WARNING SYSTEM
System Diagram
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System Description
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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
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SRC-7, "SRS Component Parts Location"
ALHIA0028GB
ALHIA0056ZZ
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 >
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Trouble Diagnosis Introduction
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CAUTION:
• Do not use electrical test equipment on any circuit related to the SRS unless instructed to do so in
this Instruction. 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-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 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 (Refer to
.)
• Fuse (Refer to
• System component-to-harness connections
SRS Operation Check
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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-III
—
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-III.
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 CONSULT-
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
"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
ON BOARD DIAGNOSTIC (OBD) SYSTEM
SRC-15
< SYSTEM DESCRIPTION >
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Trouble Diagnosis without CONSULT-III
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DIAGNOSTIC PROCEDURE 6
Inspect SRS Malfunction Using AIR BAG Warning Lamp—Diagnosis Mode
NOTE:
SRS will not enter Diagnosis mode if no malfunction is detected in User mode.
1. Turn ignition switch ON.
2. After AIR BAG warning lamp lights for 7 seconds, turn ignition switch OFF within 1 second.
3. Wait more than 3 seconds.
4. Repeat steps 1 to 3 two more times (3 times total).
5. Turn ignition switch ON.
SRS is now in Diagnosis mode. Refer to
SRC-15, "Trouble Diagnosis without CONSULT-III"
CONSULT-III Function (AIR BAG)
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CONSULT-III can display each diagnostic item using the diagnostic test modes shown following.
Self-Diagnosis Function (Without CONSULT-III)
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• The reading of these results is accomplished using one of two modes —User mode and Diagnosis mode.
• After a malfunction is repaired, turn the ignition switch OFF for at least one second, then back ON. Diagnosis
mode returns to the User mode. At that time, the self-diagnostic result is cleared.
AIR BAG diagnostic mode
Description
SELF-DIAG [CURRENT]
A current Self-diagnosis result (also indicated by the number of warning lamp flashes in the Diagnosis
mode) is displayed on the CONSULT-III screen in real time. This refers to a malfunctioning part requir-
ing repairs.
SELF-DIAG [PAST]
Diagnosis results previously stored in the memory are displayed on the CONSULT-III screen. The
stored results will remain until memory erasing is executed.
TROUBLE DIAG RECORD
With TROUBLE DIAG RECORD, diagnosis results previously erased by a reset operation can be dis-
played on the CONSULT-III screen.
ECU DISCRIMINATED NO.
Air bag diagnosis sensor unit ECU discriminated number (identification number) is displayed. Air bag
diagnosis sensor unit has individual ECU discriminated number (identification number) based on model
and equipment.
PASSENGER AIR BAG
The STATUS (readiness) of the front passenger air bag module is displayed. The STATUS displayed
(ON/OFF) depends on the signals supplied to the occupant classification system control module and
air bag diagnosis sensor unit. Refer to
SRC-10, "Occupant Classification System (OCS)"
formation.
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