Nissan March K13. Manual - part 625

B1074, B1075, B1076, B1077, B1078, B1079 DIAGNOSIS SENSOR UNIT

SRC-39

< DTC/CIRCUIT DIAGNOSIS >

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B1074, B1075, B1076, B1077, B1078, B1079 DIAGNOSIS SENSOR UNIT

Description

INFOID:0000000006055200

• It detects a shock that is more than the specified level and monitors whether the driver air bag operates nor-

mally. 

• It contains the “G” sensor for frontal collisions and spare battery function in case of main battery damage in

collision.

DTC Logic

INFOID:0000000005987919

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

CHECK SELF-DIAG RESULT

 With CONSULT-III

1.

Turn ignition switch ON.

2.

Perform “AIR BAG” Self Diagnostic Result.

 Without CONSULT-III

1.

Turn ignition switch ON.

2.

Check the air bag warning lamp status. Refer to 

SRC-7, "On Board Diagnosis Function"

.

NOTE:
SRS does not enter the diagnosis mode if no malfunction is detected in the user mode.

Is malfunctioning part detected?

YES

>> Refer to 

SRC-39, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000005987920

WARNING:

• Before servicing, turn ignition switch OFF, disconnect battery negative terminal, and wait at least 3

minutes or more. (To discharge backup capacitor.)

• Never use unspecified tester or other measuring device. 

1.

CHECK HARNESS CONNECTOR

Check the harness connector.
Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Replace harness connectors.

2.

CHECK WIRING HARNESS

Check the wiring harness externals.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Replace wiring harness.

3.

REPLACE AIR BAG DIAGNOSIS SENSOR UNIT

1.

Replace air bag diagnosis sensor unit. Refer to 

SR-29, "Removal and Installation"

.

2.

Perform DTC confirmation procedure. Refer to 

SRC-39, "DTC Logic"

.

DTC

Display contents of 

CONSULT-III

DTC detecting condition

Possible cause

B1074
B1075
B1076
B1077
B1078
B1079

CONTROL UNIT 

Air bag diagnosis sensor unit is malfunctioning

Malfunction in air bag diagnosis sensor unit

SRC-40

< DTC/CIRCUIT DIAGNOSIS >

B1074, B1075, B1076, B1077, B1078, B1079 DIAGNOSIS SENSOR UNIT

Is DTC detected?

YES

>> GO TO 1.

NO

>> INSPECTION END

B1209 FRONTAL COLLISION DETECTION

SRC-41

< DTC/CIRCUIT DIAGNOSIS >

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B1209 FRONTAL COLLISION DETECTION

Description

INFOID:0000000005988041

The air bag are activated by the air bag diagnosis sensor unit signal transmitted at the time of the frontal colli-
sion.

DTC Logic

INFOID:0000000005988042

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

CHECK SELF-DIAG RESULT

 With CONSULT-III

1.

Turn ignition switch ON.

2.

Perform “AIR BAG” Self Diagnostic Result.

 Without CONSULT-III

1.

Turn ignition switch ON.

2.

Check the air bag warning lamp status. Refer to 

SRC-7, "On Board Diagnosis Function"

.

NOTE:
SRS does not enter the diagnosis mode if no malfunction is detected in the user mode.

Is malfunctioning part detected?

YES

>> Refer to 

SRC-41, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000005988043

WARNING:

• Before servicing, turn ignition switch OFF, disconnect battery negative terminal, and wait at least 3

minutes or more. (To discharge backup capacitor.)

• Never use unspecified tester or other measuring device. 

1.

PERFORM COLLISION DIAGNOSIS

Perform collision diagnosis.Refer to 

SR-6, "FOR FRONTAL COLLISION : When SRS is activated in a colli-

sion"

 or 

SR-7, "FOR FRONTAL COLLISION : When SRS is not activated in a collision"

.

Is collision diagnosis complete?

YES

>> GO TO 2.

NO

>> INSPECTION END

2.

FINAL INSPECTION

Perform “AIR BAG” Self Diagnostic Result.
Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Perform diagnosis of applicable DTC.Refer to 

SRC-11, "DTC Index"

.

DTC

Display contents of CON-

SULT-III

DTC detecting condition

Possible cause

B1209

FRONTAL COLLISION 
DETECTION

Driver side air bag is deployed

—

SRC-42

< SYMPTOM DIAGNOSIS >

SRS AIR BAG WARNING LAMP DOES NOT TURN OFF

SYMPTOM DIAGNOSIS

SRS AIR BAG WARNING LAMP DOES NOT TURN OFF

Diagnosis Procedure

INFOID:0000000005911349

1.

CHECK AIR BAG MODULE AND SEAT BELT PRE-TENSIONER     

Check the deployment of air bag module.

Is air bag module deployed?

YES

>> Replace the malfunctioning parts.

NO

>> GO TO 2.

2.

CHECK AIR BAG FUSE

Check 10 A fuse [No.5, located in fuse block (J/B)].

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Replace the fuse.

3.

CHECK HARNESS CONNECTOR

Check the harness connector.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Replace harness connectors.

4.

CHECK WIRING HARNESS

Check the wiring harness externals.
Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Replace wiring harness.

5.

REPLACE AIR BAG DIAGNOSIS SENSOR UNIT

1.

Replace air bag diagnosis sensor unit. Refer to 

SR-29, "Removal and Installation"

.

2.

Check air bag warning lamp operation.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> GO TO 6.

6.

REPLACE COMBINATION METER

1.

Replace combination meter. Refer to 

MWI-51, "Exploded View"

.

2.

Check air bag warning lamp operation.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> GO TO 1.