Nissan Quest E52. Manual - part 1129

B1011, B1012, B1013, B1014, B1015 DIAGNOSIS SENSOR UNIT

SRC-45

< DTC/CIRCUIT DIAGNOSIS >

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B1011, B1012, B1013, B1014, B1015 DIAGNOSIS SENSOR UNIT

DTC Logic

INFOID:0000000009649859

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

CHECK SELF-DIAG RESULT

 With CONSULT

1.

Turn ignition switch ON.

2.

Perform “Self Diagnostic Result” mode of “AIR BAG” using CONSULT.

 Without CONSULT

1.

Turn ignition switch ON.

2.

Check the air bag warning lamp status. Refer to 

SRC-15, "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-45, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000009649860

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.

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-45, "DTC Logic"

Is DTC detected?

YES

>>  GO TO 1.

NO

>> INSPECTION END

DTC

Display contents of 

CONSULT

DTC detecting condition

Possible cause

B1011
B1012
B1013
B1014
B1015

CONTROL UNIT 

Air bag diagnosis sensor unit is malfunctioning

Malfunction in air bag diagnosis sensor unit

SRC-46

< DTC/CIRCUIT DIAGNOSIS >

B1017, B1020, B1021 OCCUPANT SENS C/U

B1017, B1020, B1021 OCCUPANT SENS C/U

DTC Logic

INFOID:0000000009649861

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

CHECK SELF-DIAG RESULT

 With CONSULT

1.

Turn ignition switch ON.

2.

Perform “AIR BAG” Self Diagnostic Result CONSULT.

 Without CONSULT

1.

Turn ignition switch ON.

2.

Check the air bag warning lamp status. Refer to 

SRC-15, "On Board Diagnosis Function"

.

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

Is malfunctioning part detected?

YES

>> Refer to 

SRC-46, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000009649862

WARNING:

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

minutes. (To discharge backup capacitor.)

• Never use unspecified tester or other measuring device. 

DIAGNOSTIC PROCEDURE

1.

CHECK HARNESS CONNECTOR

Check the connection of 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 OCCUPANT DETECTION SYSTEM CONTROL UNIT

1.

Replace occupant detection system control unit. Refer to 

SR-32, "Removal and Installation"

.

2.

Perform DTC confirmation procedure. Refer to 

SRC-46, "DTC Logic"

.

Is DTC detected?

YES

>>  GO TO 4.

NO

>> INSPECTION END

4.

REPLACE OCCUPANT DETECTION SYSTEM SEAT SENSOR

DTC

Display contents of 

CONSULT

DTC detecting condition

Possible cause

B1017
B1020
B1021

OCCUPANT SENS C/U 
[UNIT FAIL]

Trouble occurs in Occupant Detection 
System control unit

• Disconnection of wiring harness
• Malfunction in Occupant Detection 

System control unit

• Malfunction in air bag diagnosis sen-

sor unit

B1017, B1020, B1021 OCCUPANT SENS C/U

SRC-47

< DTC/CIRCUIT DIAGNOSIS >

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1.

Replace passenger seat cushion frame. Refer to 

SE-85, "Exploded View"

 (Manual seat) or 

SE-99,

"Exploded View"

 (Power seat).

2.

Perform DTC confirmation procedure. Refer to 

SRC-46, "DTC Logic"

.

Is DTC detected?

YES

>>  GO TO 5.

NO

>> INSPECTION END

5.

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-46, "DTC Logic"

.

Is DTC detected?

YES

>>  GO TO 1.

NO

>> INSPECTION END

SRC-48

< DTC/CIRCUIT DIAGNOSIS >

B1018 OCCUPANT SENS

B1018 OCCUPANT SENS

DTC Logic

INFOID:0000000009649863

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

CHECK SELF-DIAG RESULT

 With CONSULT

1.

Turn ignition switch ON.

2.

Perform “AIR BAG” Self Diagnostic Result CONSULT.

 Without CONSULT

1.

Turn ignition switch ON.

2.

Check the air bag warning lamp status. Refer to 

SRC-15, "On Board Diagnosis Function"

.

NOTE:
SRS does not enter diagnosis mode if no malfunction is detected in user mode.
Is malfunctioning part detected?

YES

>> Refer to 

SRC-48, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000009649864

WARNING:

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

minutes. (To discharge backup capacitor.)

• Never use unspecified tester or other measuring device. 

DIAGNOSTIC PROCEDURE

1.

CHECK HARNESS CONNECTOR

Check the connection of 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 OCCUPANT DETECTION SYSTEM CONTROL UNIT

1.

Replace occupant detection system control unit. Refer to 

SR-32, "Removal and Installation"

.

2.

Perform DTC confirmation procedure. Refer to 

SRC-48, "DTC Logic"

.

Is DTC detected?

YES

>>  GO TO 4.

NO

>> INSPECTION END

DTC

Display contents of 

CONSULT

DTC detecting condition

Possible cause

B1018

OCCUPANT SENS 
[UNIT FAIL]

Malfunction occurs in Occupant Detec-
tion System sensor

• Disconnection of wiring harness
• Malfunction in Occupant Detection 

System sensor

• Malfunction in Occupant Detection 

System control unit

• Malfunction in air bag diagnosis sen-

sor unit