Nissan Note E12. Manual - part 581

B1049 DRIVER AIRBAG MODULE

SRC-29

< DTC/CIRCUIT DIAGNOSIS >

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B1049 DRIVER AIRBAG MODULE

DTC Logic

INFOID:0000000009460188

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE (With CONSULT)

1.

CHECK SELF-DIAG RESULT

1. Turn ignition switch ON.

2. Check for DTC using CONSULT.
Is the DTC detected?

YES (Current DTC)>>Refer to 

SRC-29, "Diagnosis Procedure"

.

YES (Past DTC)>>GO TO 2.

NO

>> Inspection End.

2.

ERASE SELF-DIAG RESULT

Erase the DTC using CONSULT.
Can the DTC be erased?

YES

>> Inspection End.

NO

>> Refer to 

SRC-29, "Diagnosis Procedure"

.

DTC CONFIRMATION PROCEDURE (Without CONSULT)

1.

CHECK SELF-DIAG RESULT

1. Turn ignition switch ON.

2. Check the air bag warning lamp status. Refer to 

SRC-9, "On Board Diagnosis Function"

.

NOTE:

SRS will not enter diagnosis mode if no malfunction is detected in user mode.
Is the DTC detected?

YES

>> Refer to 

SRC-29, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000009460189

WARNING:

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

or more. (To discharge backup capacitor.)

• Never use unspecified tester or other measuring device. 

1.

HARNESS CONNECTOR

Visually inspect all applicable harness connectors for the following:

• Visible damage to connector or terminal

• Loose terminal

• Poor connection

NOTE:

All harness connectors should be inspected from the air bag diagnosis unit to the end component (including

any in-line connectors). 

Is the inspection result normal?

YES

>> GO TO 2.

DTC

Display contents of 

CONSULT

DTC detecting condition

Repair order

B1049

DRIVER AIRBAG 
MODULE
[OPEN]

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

1.

Visually check the wiring harness connection.

2.

Replace the harness if it has visible damage.

3.

Inspect the spiral cable circuit.

4.

Replace the air bag diagnosis sensor unit.

5.

Replace the driver air bag module.

6.

Replace the related harness.

SRC-30

< DTC/CIRCUIT DIAGNOSIS >

B1049 DRIVER AIRBAG MODULE

NO

>> Perform one of the following repairs:

• Visible damage: Replace the harness.

• Loose terminal: Secure the terminal.

• Poor connection: Secure the connection.

2.

CONFIRM DTC

1. Reconnect all harness connectors.

2. Turn ignition switch ON.

3. Check for DTC using CONSULT.
Is DTC still current?

YES

>> GO TO 3.

NO

>> Refer to 

GI-41, "Intermittent Incident"

.

3.

WIRING HARNESS

Check the wiring harness for visible damage.

NOTE:

The entire wiring harness should be inspected from the air bag diagnosis sensor unit to the end component

(including any in-line connectors).
Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Replace the harness.

4.

CHECK SPIRAL CABLE CIRCUIT 

1. Turn ignition switch OFF.

2. Disconnect driver air bag module harness connector and combination switch (spiral cable) harness con-

nector.

3. Check continuity between driver air bag module harness connector and combination switch (spiral cable)

harness connector.

4. Check continuity between driver air bag module harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Replace combination switch (spiral cable). Refer to 

SR-15, "Removal and Installation"

.

5.

CONFIRM DTC

1. Reconnect all harness connectors.

2. Turn ignition switch ON.

3. Check for DTC using CONSULT.
Is DTC still current?

YES

>> GO TO 6.

NO

>> Refer to 

GI-41, "Intermittent Incident"

.

6.

AIR BAG DIAGNOSIS SENSOR UNIT

1. Replace the air bag diagnosis sensor unit. Refer to 

SR-21, "Removal and Installation"

.

2. Turn ignition switch ON.

3. Check for DTC using CONSULT.
Is DTC still current?

Driver air bag module

Combination switch (spiral cable)

Continuity 

Connector

Terminal

Connector

Terminal

M87

10

M31

28

Yes

11

30

Driver side air bag module

Ground

Continuity 

Connector

Terminal

M87

10

No

11

B1049 DRIVER AIRBAG MODULE

SRC-31

< DTC/CIRCUIT DIAGNOSIS >

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YES

>> GO TO 7.

NO

>> Clear DTC. Inspection End.

7.

DRIVER AIR BAG MODULE

1. Replace the driver air bag module. Refer to 

SR-12, "Removal and Installation"

.

2. Turn ignition switch ON.

3. Check for DTC using CONSULT.
Is DTC still current?

YES

>> GO TO 8.

NO

>> Clear DTC. Inspection End.

8.

RELATED HARNESS

Replace the related harness.

>> END

SRC-32

< DTC/CIRCUIT DIAGNOSIS >

B1050 DRIVER AIRBAG MODULE

B1050 DRIVER AIRBAG MODULE

DTC Logic

INFOID:0000000009460190

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE (With CONSULT)

1.

CHECK SELF-DIAG RESULT

1. Turn ignition switch ON.

2. Check for DTC using CONSULT.
Is the DTC detected?

YES (Current DTC)>>Refer to 

SRC-32, "Diagnosis Procedure"

.

YES (Past DTC)>>GO TO 2.

NO

>> Inspection End.

2.

ERASE SELF-DIAG RESULT

Erase the DTC using CONSULT.
Can the DTC be erased?

YES

>> Inspection End.

NO

>> Refer to 

SRC-32, "Diagnosis Procedure"

.

DTC CONFIRMATION PROCEDURE (Without CONSULT)

1.

CHECK SELF-DIAG RESULT

1. Turn ignition switch ON.

2. Check the air bag warning lamp status. Refer to 

SRC-9, "On Board Diagnosis Function"

.

NOTE:

SRS will not enter diagnosis mode if no malfunction is detected in user mode.
Is the DTC detected?

YES

>> Refer to 

SRC-32, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000009460191

1.

HARNESS CONNECTOR

Visually inspect all applicable harness connectors for the following:

• Visible damage to connector or terminal

• Loose terminal

• Poor connection

NOTE:

All harness connectors should be inspected from the air bag diagnosis unit to the end component (including

any in-line connectors). 

Is the inspection result normal?

YES

>> GO TO 2

NO

>> Perform one of the following repairs:

• Visible damage: Replace the harness.

• Loose terminal: Secure the terminal.

• Poor connection: Secure the connection.

DTC

Display contents of 

CONSULT

DTC detecting condition

Repair order

B1050

DRIVER AIRBAG 
MODULE 
[VB-SHORT]

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

1.

Visually check the wiring harness connection.

2.

Replace the harness if it has visible damage.

3.

Inspect the spiral cable circuit.

4.

Replace the air bag diagnosis sensor unit.

5.

Replace the driver air bag module.

6.

Replace the related harness.