Nissan Murano: Srs Air Bag Control System :: Dtc/circuit Diagnosis / B0001 Driver Air Bag Module

DTC Description

DTC DETECTION LOGIC

POSSIBLE CAUSE

[OPEN]

• Connection malfunction or open circuit of harness and connector

• Internal malfunction of driver air bag module

• Internal malfunction of air bag diagnosis sensor unit

[VB-SHORT]

• Connection malfunction or short circuit to power supply of harness and connector

• Internal malfunction of driver air bag module

• Internal malfunction of air bag diagnosis sensor unit

[GND-SHORT]

• Connection malfunction or short circuit to ground of harness and connector

• Internal malfunction of driver air bag module

• Internal malfunction of air bag diagnosis sensor unit

[SHORT]

• Connection malfunction or short circuit of harness and connector

• Internal malfunction of driver air bag module

• Internal malfunction of air bag diagnosis sensor unit

FAIL-SAFE

—

DTC CONFIRMATION PROCEDURE

CHECK SELF DIAGNOSTIC RESULT

CONSULT

1. Ignition switch ON.

2. Select "Self Diagnostic Result" mode of "AIR BAG".

3. Check for DTC.

Is the DTC detected?

(Current DTC) Refer to DTC Diagnosis Procedure.

(Past DTC) GO TO 2.

Inspection End.

ERASE SELF DIAGNOSTIC RESULT

CONSULT

Erase the DTC.

Can the DTC be erased?

Inspection End.

Refer to DTC Diagnosis Procedure.

DTC CONFIRMATION PROCEDURE

CHECK SELF DIAGNOSTIC RESULT

CONSULT

1. Ignition switch ON.

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

NOTE:

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

Is the DTC detected?

Refer to DTC Diagnosis Procedure.

Inspection End.

WARNING:

• Before servicing, 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.

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 sensor unit to the end component (including any in-line connectors).

Is the inspection result normal?

GO TO 2.

Perform one of the following repairs:

• Visible damage: Replace the harness.

• Loose terminal: Secure the terminal.

• Poor connection: Secure the connection.

CONFIRM DTC

CONSULT

1. Reconnect all harness connectors.

2. Ignition switch ON.

3. Select "Self Diagnostic Result" mode of "AIR BAG".

4. Check for DTC.

Is DTC still current?

GO TO 3.

Refer to Intermittent Incident.

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?

GO TO 4.

Replace the harness.

CHECK SPIRAL CABLE CIRCUIT

1. Ignition switch OFF.

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

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

   Driver air bag module		Combination switch (spiral cable)		Continuity
   Connector	Terminal	Connector	Terminal
   M76	29	M41	22	Yes
   	30		24

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

   Driver air bag module		—	Continuity
   Connector	Terminal
   M76	29	Ground	No
   	30

Is the inspection result normal?

GO TO 5.

Replace the spiral cable. Refer to Removal and Installation.

CONFIRM DTC

CONSULT

1. Reconnect all harness connectors.

2. Ignition switch ON.

3. Select "Self Diagnostic Result" mode of "AIR BAG".

4. Check for DTC.

Is DTC still current?

GO TO 6.

Refer to Intermittent Incident.

DRIVER AIR BAG MODULE

CONSULT

1. Replace the driver air bag module. Refer to Removal and Installation.

2. Ignition switch ON.

3. Select "Self Diagnostic Result" mode of "AIR BAG".

4. Check for DTC.

Is DTC still current?

GO TO 7.

Clear DTC. Inspection End.

AIR BAG DIAGNOSIS SENSOR UNIT

CONSULT

1. Replace the air bag diagnosis sensor unit. Refer to Removal and Installation.

2. Ignition switch ON.

3. Select "Self Diagnostic Result" mode of "AIR BAG".

4. Check for DTC.

Is DTC still current?

GO TO 8.

Clear DTC. Inspection End.

RELATED HARNESS

Replace the related harness.

Inspection End.