Nissan Maxima. Manual - part 1097

SRC-16

< DTC/CIRCUIT DIAGNOSIS >

B1049 – B1052, B1054 – B1057 DRIVER AIRBAG MODULE

DTC/CIRCUIT DIAGNOSIS

B1049 – B1052, B1054 – B1057 DRIVER AIRBAG MODULE

Description

INFOID:0000000009466492

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"

.

DTC Logic

INFOID:0000000009466493

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-17, "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?

CONSULT 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.

Inspect spiral cable circuit.

4.

Replace the air bag diagnosis sensor unit.

5.

Replace the driver air bag module.

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).

B1049 – B1052, B1054 – B1057 DRIVER AIRBAG MODULE

SRC-17

< DTC/CIRCUIT DIAGNOSIS >

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YES

>> Inspection End.

NO

>> Refer to 

SRC-17, "Diagnosis Procedure"

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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-14, "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-17, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000009466494

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 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-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 connector and combination switch (spiral cable) connector.

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

harness connector.

SRC-18

< DTC/CIRCUIT DIAGNOSIS >

B1049 – B1052, B1054 – B1057 DRIVER AIRBAG MODULE

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

Is the inspection result normal?

YES

>> GO TO 4

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-31, "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.

FRONT 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

Driver air bag module

Combination switch (spiral cable)

Continuity

Connector

Terminal

Connector

Terminal

M105

1

M29

28

YES

2

30

M106

3

29

4

30

Driver air bag module

Ground

Continuity

Connector

Terminal

M105

1

NO

2

M106

3

4

B1065 – B1068, B1070 – B1073 PASSENGER AIRBAG MODULE

SRC-19

< DTC/CIRCUIT DIAGNOSIS >

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B1065 – B1068, B1070 – B1073 PASSENGER AIRBAG MODULE

Description

INFOID:0000000009466495

DTC B1065 – B1068, B1070 – B1073 PASSENGER AIR BAG MODULE

The passenger air bag module is dual stage and wired to the air bag diagnosis sensor unit. The air bag diag-

nosis sensor unit will monitor for opens and shorts in detected lines to the passenger air bag module.

PART LOCATION

Refer to 

SRC-7, "SRS Component Parts Location"

.

DTC Logic

INFOID:0000000009466496

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-20, "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-20, "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-14, "Trouble Diagnosis without CONSULT"

.

NOTE:

CONSULT name

DTC

DTC detecting condition

Repair order

ASSIST A/B MODULE 

[OPEN]

B1065

Front passenger air bag module circuit 
(AS1) is open.

1.

Visually check the wiring harness connection.

2.

Replace the harness if it has visible damage.

3.

Replace the air bag diagnosis sensor unit.

4.

Replace the front passenger air bag module.

5.

Replace the related harness.

B1070

Front passenger air bag module circuit 
(AS2) is open.

ASSIST A/B MODULE 

[VB-SHORT]

B1066

Front passenger air bag module circuit 
(AS1) is shorted to a power supply circuit.

B1071

Front passenger air bag module circuit 
(AS2) is shorted to a power supply circuit.

ASSIST A/B MODULE 

[GND-SHORT]

B1067

Front passenger air bag module circuit 
(AS1) is shorted to ground.

B1072

Front passenger air bag module circuit 
(AS2) is shorted to ground.

ASSIST A/B MODULE 

[SHORT]

B1068

Front passenger air bag module circuits 
(AS1) are shorted to each other.

B1073

Front passenger air bag module circuits 
(AS2) are shorted to each other.