Nissan Quest E52. Manual - part 1130

B1018 OCCUPANT SENS

SRC-49

< DTC/CIRCUIT DIAGNOSIS >

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4.

REPLACE OCCUPANT DETECTION SYSTEM SEAT SENSOR

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-48, "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-48, "DTC Logic"

.

Is DTC detected?

YES

>>  GO TO 1.

NO

>> INSPECTION END

SRC-50

< DTC/CIRCUIT DIAGNOSIS >

B1022 OCCUPANT SENS C/U

B1022 OCCUPANT SENS C/U

DTC Logic

INFOID:0000000009649865

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-50, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000009649866

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-50, "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

B1022

OCCUPANT SENS C/U 
[COMM FAIL]

Malfunction occurs in Occupant Detec-
tion System control unit, circuit of Occu-
pant Detection System control unit-Air 
bag diagnosis sensor unit or Air bag di-
agnosis sensor unit

• Disconnection of wiring harness
• Malfunction in Occupant Detection 

System control unit

• Malfunction in air bag diagnosis sen-

sor unit

B1022 OCCUPANT SENS C/U

SRC-51

< DTC/CIRCUIT DIAGNOSIS >

C

D

E

F

G

I

J

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L

M

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SRC

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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-50, "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-50, "DTC Logic"

.

Is DTC detected?

YES

>> GO TO 1.

NO

>> INSPECTION END

SRC-52

< DTC/CIRCUIT DIAGNOSIS >

B1023 PASS A/B INDCTR CKT

B1023 PASS A/B INDCTR CKT

DTC Logic

INFOID:0000000009649867

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-52, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000009649868

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.

CHECK PASSENGER AIR BAG OFF INDICATOR

1.

Replace passenger air bag OFF indicator. 

2.

Perform DTC confirmation procedure. Refer to 

SRC-52, "DTC Logic"

.

Is DTC detected?

YES

>> GO TO 4.

NO

>> INSPECTION END

4.

REPLACE AIR BAG DIAGNOSIS SENSOR UNIT

1.

Replace air bag diagnosis sensor unit. Refer to 

SR-29, "Removal and Installation"

.

DTC

Display contents of 

CONSULT

DTC detecting condition

Possible cause

B1023

PASS A/B INDCTR CKT 
[UNIT FAIL]

Passenger air bag OFF indicator circuit 
is open or shorted to ground or the cir-
cuits are shorted each other

• Disconnection of wiring harness
• Malfunction in front passenger air 

bag OFF indicator

• Malfunction in air bag diagnosis sen-

sor unit