Nissan Altima L32. Manual - part 1371

SRC-14

< FUNCTION DIAGNOSIS >

ON BOARD DIAGNOSTIC (OBD) SYSTEM

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-70, "Trouble Diagnosis without CONSULT-III"

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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.

The air bag diagnosis sensor unit for each vehicle model is assigned with its own, individual classifica-
tion number. This number will be displayed on the CONSULT-III screen, as shown. When replacing the 
air bag diagnosis sensor unit, refer to the part number for the compatibility. After installation, replace-
ment with a correct unit can be checked by confirming this classification number on the CONSULT-III 
screen.
The air bag diagnosis sensor unit discriminated numbers assigned are FAC5 (US and Canada) 
and F65B (Mexico).

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 unit and air 
bag diagnosis sensor unit.  Refer to 

SRC-10, "Occupant Classification System (OCS)"

 for more infor-

mation.

ON BOARD DIAGNOSTIC (OBD) SYSTEM

SRC-15

< FUNCTION DIAGNOSIS >

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HOW TO CHANGE SELF-DIAGNOSIS MODE 

DIAGNOSTIC PROCEDURE 3

Final Check of SRS Using CONSULT-III—Diagnosis Mode

1. Connect CONSULT-III.
2. If no DTC is detected on “SELF-DIAG [CURRENT]”, repair of SRS is completed. Go to step 3.

If any DTC is detected on “SELF-DIAG [CURRENT]”, the malfunctioning part has not been repaired com-

pletely or another malfunctioning part is being detected. Perform DIAGNOSTIC PROCEDURE 2.  Refer to

SRC-12, "SRS Operation Check"

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3. Touch “ERASE”.

NOTE:

Touch “ERASE” to clear the memory of the malfunction (“SELF-DIAG [PAST]”).

If the memory of the malfunction in “SELF-DIAG [PAST]” is not erased, the User mode shows the system

malfunction by the operation of the warning lamp even if the malfunction is repaired completely.

4. Touch “BACK” key of CONSULT-III.  Touch “SELF-DIAG [PAST]”.
5. Check that no malfunction is detected on “SELF-DIAG [PAST]”.
6. Touch “BACK” key of CONSULT-III to return to User mode from Diagnosis mode.
7. Turn ignition switch OFF and then turn off and disconnect CONSULT-III.
8. Go to 

SRC-12, "SRS Operation Check"

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DIAGNOSTIC PROCEDURE 4

Check SRS Repair History

1.

CONSIDER POSSIBILITY THAT SELF-DIAGNOSTIC RESULT WAS NOT ERASED AFTER REPAIR

Check repair history of the SRS.
Have any previous repairs been made to the SRS?

YES

>> Self-diagnostic result “SELF-DIAG [PAST]” (previously stored in the memory) might not be erased

after repair. Perform DIAGNOSTIC PROCEDURE 3.  Refer to 

SRC-14, "Self-Diagnosis Function

(Without CONSULT-III)"

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NO

>> Perform DIAGNOSTIC PROCEDURE 2.  Refer to 

SRC-12, "SRS Operation Check"

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SHIA0183E

SRC-16

< COMPONENT DIAGNOSIS >

B1049 – B1052, B1054 – B1057 DRIVER AIRBAG MODULE

COMPONENT DIAGNOSIS

B1049 – B1052, B1054 – B1057 DRIVER AIRBAG MODULE

Description

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DTC B1049 – B1052, B1054 – B1057 DRIVER AIRBAG MODULE

The driver air bag module is dual stage and wired to the air bag diagnosis sensor unit through the spiral cable.

The air bag diagnosis sensor unit will monitor for opens and shorts in detected lines to the driver air bag mod-

ule including the spiral cable.

PART LOCATION

Refer to 

SRC-7, "SRS Component Parts Location"

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DTC Logic

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DTC DETECTION LOGIC 

With CONSULT-lll

Without CONSULT-lll

DTC CONFIRMATION PROCEDURE (With CONSULT-lll)

CONSULT-III name

DTC

DTC detecting condition

Repair order

DRIVER AIRBAG MODULE 

[OPEN]

B1049

Driver air bag module circuit (DR1) is open
(including the spiral cable).

1.

Visually check the wiring harness connection.

2.

Replace the harness if it has visible damage.

3.

Replace the driver air bag module.

4.

Replace the spiral cable.

5.

Replace the air bag diagnosis sensor unit.

6.

Replace the related harness.

B1054

Driver air bag module circuit (DR2) is open
(including the spiral cable).

DRIVER AIRBAG MODULE 

[VB-SHORT]

B1050

Driver air bag module circuit (DR1) is 
shorted to a power supply circuit
(including the spiral cable).

B1055

Driver air bag module circuit (DR2) is 
shorted to a power supply circuit
(including the spiral cable).

DRIVER AIRBAG MODULE 

[GND-SHORT]

B1051

Driver air bag module circuit (DR1) is 
shorted to ground
(including the spiral cable).

B1056

Driver air bag module circuit (DR2) is 
shorted to ground
(including the spiral cable).

DRIVER AIRBAG MODULE 

[SHORT]

B1052

Driver air bag module circuits (DR1) are 
shorted to each other
(including the spiral cable).

B1057

Driver air bag module circuits (DR2) are 
shorted to each other
(including the spiral cable).

WHIA0260E

B1049 – B1052, B1054 – B1057 DRIVER AIRBAG MODULE

SRC-17

< COMPONENT DIAGNOSIS >

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1.

INSPECTION START

Turn ignition switch ON.

>> GO TO 2.

2.

CHECK SELF-DIAG RESULT

Check for the DTC on CONSULT-lll.
Is the DTC detected?

YES

>> Refer to 

SRC-17, "Diagnosis Procedure (Component Diagnosis)"

.

NO

>> Inspection End.

DTC CONFIRMATION PROCEDURE (Without CONSULT-lll)

NOTE:

SRS will not enter diagnosis mode if no malfunction is detected in user mode.

1.

IGNITION SWITCH

Turn ignition switch ON.

>> GO TO 2

2.

IGNITION SWITCH

After air bag warning lamp lights for 7 seconds, turn ignition switch OFF within 1 second.

>> GO TO 3

3.

WAIT TIME

Wait more than 3 seconds.

>> GO TO 4

4.

REPEAT STEPS

Repeat steps 1 to 3 twice.

>> GO TO 5

5.

IGNITION SWITCH

Turn ignition switch ON.

>> GO TO 6

6.

DIAGNOSTIC MODE

SRS system is now in diagnostic mode and AIR BAG warning lamp flashes. Refer to 

SRC-70, "Trouble Diag-

nosis without CONSULT-III"

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>> END

Diagnosis Procedure (Component Diagnosis)

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Recheck SRS after each replacement.

1.

HARNESS CONNECTOR

Is there any visible damage to the connector?
YES or NO

YES

>> Replace the harness.

NO

>> GO TO 2