Nissan GT-R. Manual - part 298

SRC-8

< SYSTEM DESCRIPTION >

DIAGNOSIS SYSTEM (AIRBAG)

DIAGNOSIS SYSTEM (AIRBAG)

Diagnosis Description

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CAUTION:

• Never 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 harness
connectors.

• Never 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.
• The user mode is exclusively prepared for the customer (driver). This mode warns the driver of a system

malfunction 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 is as per the following.

×

: Application, —: Not application

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.

Check that the following parts are in good order.
• Battery (Refer to 

PG-3, "How to Handle Battery"

)

• Fuse (Refer to 

PG-24, "Fuse"

)

• System component-to-harness connections

Air Bag Warning Lamp Diagnosis

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SELF-DIAGNOSIS FUNCTION

• The reading of these results is accomplished by “User mode” and “Diagnosis mode”.
• After a malfunction is repaired, turn ignition switch ON. Diagnosis mode returns to the user mode. At that

time, the self-diagnosis result is cleared.

User mode

Diagnosis mode

Display type

Air bag warning lamp

X

X

ON-OFF operation

DIAGNOSIS SYSTEM (AIRBAG)

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< SYSTEM DESCRIPTION >

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HOW TO CHANGE SELF-DIAGNOSIS MODE WITHOUT CONSULT

DIAGNOSTIC PROCEDURE (USER MODE) 

Checking air bag operation according to 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 air bag warning lamp blinking pattern with the
examples.

PHIA0709E

BF-1845D

SRC-10

< SYSTEM DESCRIPTION >

DIAGNOSIS SYSTEM (AIRBAG)

Air bag warning lamp examples (User mode)

Air bag warning lamp operation -User mode 

SRS condition

• No malfunction is detected
• No further action is necessary

• The system is malfunctioning and needs to be repaired 

as indicated

• Air bag is deployed
• Seat belt pre-tensioner is deployed

• Air bag diagnosis sensor unit is malfunctioning
• Air bag power supply circuit is malfunctioning
• Air bag warning lamp circuit is malfunctioning

• Air bag diagnosis sensor unit is malfunctioning
• Air bag warning lamp circuit is malfunctioning

SHIA0011E

SHIA0012E

SHIA0013E

SHIA0014E

DIAGNOSIS SENSOR UNIT

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< ECU DIAGNOSIS INFORMATION >

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ECU DIAGNOSIS INFORMATION

DIAGNOSIS SENSOR UNIT

Wiring Diagram - SRS AIR BAG CONTROL SYSTEM -

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For connector terminal arrangements, harness layouts, and alphabets in a 

 (option abbreviation; if not

described in wiring diagram), refer to 

GI-12, "Connector Information"

.

JRHWC0358GB