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Nissan March K13. Manual - part 617

DIAGNOSIS SYSTEM (AIR BAG)

SRC-7

< SYSTEM DESCRIPTION >

SRC

DIAGNOSIS SYSTEM (AIR BAG)

Description

INFOID:0000000005911191

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-diagnostic results can be read with 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

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 and CONSULT-III are as per the following items.

: Application, —: Not application

On Board Diagnosis Function

INFOID:0000000005911192

ON-BOARD DIAGNOSIS

There are two self diagnosis functions with air bag warning lamp per the following items.
• USER MODE
• DIAGNOSIS MODE

METHOD OF STARTING

• Diagnosis mode changes from user mode to diagnosis mode when changing operation is performed.
• In user mode, when SRS air bag warning lamp is not blinking, changing to diagnosis mode by ignition switch

operation is not possible.

• In diagnosis mode, when repair is complete and system is normal, the mode changes to user mode when

ignition switch is turned from OFF to ON.

Procedure to Change Diagnosis Mode

Turn ignition switch from OFF to ON.

SRS air bag lamp turns ON for 7 second and turns OFF, then turn ignition switch OFF within 1second after
the lamp turns OFF.

After turning ignition switch OFF, wait for 3 seconds or more.

Repeat operation 1 to 3 for 2 times so that operation 1 to 3 is repeated for 3times in total.

Turn ignition switch from OFF to ON. Diagnosis mode changes.

USER MODE

In USER MODE, air bag warning lamp on combination meter blinks when a malfunction is detected and warns
the customer (driver).

How to Read Air Bag Warning Lamp

Turn the ignition switch from OFF to ON, and check that the air bag warning lamp blinks.

Compare the air bag warning lamp blinking pattern with the examples.

Air Bag Warning Lamp Examples

Diagnosis tool

User mode

Diagnosis mode

Air bag warning lamp

CONSULT-III

–

SRC-8

< SYSTEM DESCRIPTION >

DIAGNOSIS SYSTEM (AIR BAG)

DIAGNOSIS MODE

The diagnosis mode can only be switched when a malfunction is detected in the user mode. Malfunctioning
system is indicated according to blinking pattern of air bag warning lamp.

How to Read Air Bag Warning Lamp

Follow the procedures of “PROCEDURE TO CHANGE DIAGNOSIS MODE”, and switch to the diagnosis
mode.

Turn ignition switch ON. Check the blinking pattern of air bag warning lamp.
There are 2 blinking patterns for the air bag warning lamp as per the following items.
• Front air bag system: 3 second blink followed by a 0.5 second blink repeated.

Air bag warning lamp operation (user mode)

SRS condition

Reference item

A malfunction is not detect and further
action is not necessary

—

• The system is malfunctioning
• Self diagnostic result is not erased af-

ter repair

Erase “Self Diagnostic Result”
Refer to

SRC-9, "CONSULT-III

Function"

, How to Erase Self-diag-

nostic Result

Battery voltage is low (less than 9 V)

Check “CAUSE OF WARNING” in
“Special Function” with CONSULT-III
Refer to

SRC-9, "CONSULT-III

Function"

Intermittent malfunction is detected in
the past

Go to

GI-33, "Intermittent Incident"

Air bag is deployed

Go to

SRC-41, "Diagnosis Proce-

dure"

• Air bag diagnosis sensor unit is mal-

functioning

• Air bag power supply circuit is mal-

functioning

• Air bag warning lamp circuit is mal-

functioning

Go to

SRC-42, "Diagnosis Proce-

dure"

• Air bag diagnosis sensor unit is mal-

functioning

• Air bag warning lamp circuit is mal-

functioning

Go to

SRC-43, "Diagnosis Proce-

dure"

SHIA0011E

SHIA0012E

SHIA0013E

SHIA0014E

DIAGNOSIS SYSTEM (AIR BAG)

SRC-9

< SYSTEM DESCRIPTION >

SRC

Front air bag system

How to Erase Self-diagnostic Result

After a malfunction is repaired, turn the ignition switch OFF for one second or more, then turn ignition switch
ON. The diagnosis mode returns to the user mode. At that time the self-diagnostic result is cleared.

EXAMPLE OF AIR BAG WARNING LAMP OPERATION IN THE DIAGNOSIS MODE

System Normal

When system is normal.

Single System Malfunction

• Front air bag system

When air bag diagnosis sensor unit system (Item display) is malfunctioning.

Multiple Systems Malfunction

• Front air bag system

When driver air bag module (Item display 1) and air bag diagnosis sensor unit system (Item display 2) are
malfunctioning.

CONSULT-III Function

INFOID:0000000005911193

APPLICATION ITEM

CONSULT-III performs the following functions.

Number of 0.5 second blinks

Malfunctioning items

• Self-diagnostic result is not erased after repair
• Intermittent malfunction is detected in the past

Driver air bag module

Crash zone sensor

Air bag diagnosis sensor unit

JMHIA0945GB

JMHIA0946GB

JMHIA1378GB

SRC-10

< SYSTEM DESCRIPTION >

DIAGNOSIS SYSTEM (AIR BAG)

HOW TO ERASE SELF DIAGNOSTIC RESULTS

• “Self Diagnostic Result”

A current self-diagnosis result is displayed on CONSULT-III screen in real time.
After the malfunction is repaired completely, no malfunction is detected on “Self Diagnostic Result”.

• “SELF-DIAG [PAST]”

Return to “Self Diagnostic Result” CONSULT-III screen by touching the “BACK” key of CONSULT-III and
select “Self Diagnostic Result” in SELECT DIAG MODE. Touch “ERASE” in “Self Diagnostic Result” mode.
NOTE:
If the memory of the malfunction in “SELF-DIAG [PAST]” is not erased, the user mode shows the system
malfunction by the illumination of the warning lamp even if the malfunction is repaired completely.

• “TROUBLE DIAG RECORD”

The memory of “TROUBLE DIAG RECORD” cannot be erased.

SPECIAL FUNCTION

CAUSE OF WARNING

This item indicates IGN low voltage condition.
The air bag warning lamp blink in user mode when the battery voltage is lowered to the voltage value (less
than 9 V) at which the SRS cannot be operated normally. The air bag warning lamp turns OFF after the battery
voltage returns to normal status after blinking.
In such a case, the DTC memory is not performed and changing to the self-diagnostic mode by IGN operation
cannot be performed while the air bag warning lamp illuminates. “NO DTC” is displayed even if the malfunc-
tioning parts are checked by CONSULT-III.
This function records the following items.

Diagnosis mode

Description

Ecu Identification

Air bag diagnosis sensor unit ECU discriminated number (identification num-
ber) is displayed. Air bag diagnosis sensor unit has individual ECU discriminat-
ed number (identification number) based on model and equipment.

Self Diagnostic Result

The current self diagnosis results (also indicated with the number of air bag
warning lamp blinks in the diagnosis mode) are displayed on CONSULT-III
screen in real time. This refers to a malfunctioning part requiring repairs.
Refer to

SRC-11, "DTC Index"

Function Test

CAR COMPUTER DIAG.

Test result is indicated using “OK” or “NG” so that the customer recognizes eas-
ily.

Special function

SELF-DIAG [PAST]

Diagnosis results previously stored in the memory are displayed on CONSULT-
III screen. The stored results are not erased until memory erasing is executed.

TROUBLE DIAG RECORD

With TROUBLE DIAG RECORD, diagnosis results previously erased by a re-
set operation can be displayed on CONSULT-III screen.

SELF-DIAG RESULTS [CAN]

NOTE:
This item is displayed, but cannot be supported.

CAUSE OF WARNING

It displays the cause of warning lamp illumination that is not recorded in mem-
ory.

Display contents of CONSULT-III

Description

Air bag

IGN VOLT COND

“LOW” is displayed when IGN low voltage is detected. If not, “OK” is dis-
played.

IGN VOLT TIME

Times of IGN low voltage is detected.

LOW V RECORED

Times of IGN ON after IGN low voltage is detected.

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