Nissan Sentra. Manual - part 804

B0020 SIDE AIRBAG MODULE LH

SRC-51

< DTC/CIRCUIT DIAGNOSIS >

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B0020 SIDE AIRBAG MODULE LH

Description

INFOID:0000000009757961

DTC B0020 FRONT LH SIDE AIR BAG MODULE

The front LH side air bag module is wired to the air bag diagnosis sensor unit. The air bag diagnosis sensor

unit will monitor for opens and shorts in detected lines to the front LH side air bag module.

PART LOCATION

Refer to 

SRC-5, "Component Parts Location"

.

DTC Logic

INFOID:0000000009757962

DTC DETECTION LOGIC 

With CONSULT

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-51, "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-51, "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-17, "Trouble Diagnosis without CONSULT"

.

NOTE:

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

YES

>> Refer to 

SRC-51, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000009757963

1.

HARNESS CONNECTOR

CONSULT name

DTC

DTC detecting condition

Repair order

SIDE AIRBAG MODULE LH CIRCUIT 

[OPEN]

B0020

Front LH side air bag module circuit is 
open.

Refer to 

SRC-51, "Diagnosis Procedure"

.

SIDE AIRBAG MODULE LH CIRCUIT 

[VB-SHORT]

Front LH side air bag module circuit is 
shorted to a power supply circuit.

SIDE AIRBAG MODULE LH CIRCUIT 

[GND-SHORT]

Front LH side air bag module circuit is 
shorted to ground.

SIDE AIRBAG MODULE LH CIRCUIT 

[SHORT]

Front LH side air bag module circuits 
are shorted to each other.

SRC-52

< DTC/CIRCUIT DIAGNOSIS >

B0020 SIDE AIRBAG MODULE LH

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 sensor 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.

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-39, "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.

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 5.

NO

>> Refer to 

GI-39, "Intermittent Incident"

.

5.

AIR BAG DIAGNOSIS SENSOR UNIT

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

SR-28, "Removal and Installation"

.

2. Turn ignition switch ON.

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

YES

>> GO TO 6.

NO

>> Clear DTC. Inspection End.

6.

SIDE AIR BAG MODULE LH

1. Replace the side air bag module LH. Refer to 

SR-24, "Removal and Installation"

.

2. Turn ignition switch ON.

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

YES

>> GO TO 7.

NO

>> Clear DTC. Inspection End.

7.

RELATED HARNESS

Replace the related harness.

B0020 SIDE AIRBAG MODULE LH

SRC-53

< DTC/CIRCUIT DIAGNOSIS >

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>> END

SRC-54

< DTC/CIRCUIT DIAGNOSIS >

B0021 SIDE CURTAIN AIR BAG MODULE LH

B0021 SIDE CURTAIN AIR BAG MODULE LH

Description

INFOID:0000000009757964

DTC B0021 LH SIDE CURTAIN AIR BAG MODULE

The LH side curtain air bag module is wired to the air bag diagnosis sensor unit. The air bag diagnosis sensor

unit will monitor for opens and shorts in detected lines to the LH side curtain air bag module.

PART LOCATION

Refer to 

SRC-5, "Component Parts Location"

.

DTC Logic

INFOID:0000000009757965

DTC DETECTION LOGIC 

With CONSULT

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-54, "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-54, "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-17, "Trouble Diagnosis without CONSULT"

.

NOTE:

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

YES

>> Refer to 

SRC-54, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000009757966

1.

HARNESS CONNECTOR

CONSULT name

DTC

DTC detecting condition

Repair order

CURTAIN AIRBAG MODULE LH CIRCUIT 

[OPEN]

B0021

LH side curtain air bag module circuit 
is open.

Refer to 

SRC-54, "Diagnosis Proce-

dure"

.

CURTAIN AIRBAG MODULE LH CIRCUIT 

[VB-SHORT]

LH side curtain air bag module circuit 
is shorted to a power supply circuit.

CURTAIN AIRBAG MODULE LH CIRCUIT 

[GND-SHORT]

LH side curtain air bag module circuit 
is shorted to ground.

CURTAIN AIRBAG MODULE LH CIRCUIT 

[SHORT]

LH side curtain air bag module circuits 
are shorted to each other.