Nissan Titan. Manual - part 560

B1017 – B1022 OCCUPANT CLASSIFICATION SYSTEM

SRC-55

< DTC/CIRCUIT DIAGNOSIS >

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B1017 – B1022 OCCUPANT CLASSIFICATION SYSTEM

Description

INFOID:0000000009882916

DTC B1017 – B1022 OCCUPANT CLASSIFICATION SYSTEM (OCS)

The OCS control unit is wired to the air bag diagnosis sensor unit.  The air bag diagnosis sensor unit will mon-

itor the OCS for failures and  interruptions in communication between the OCS control unit and the air bag

diagnosis sensor unit.

PART LOCATION

Refer to 

SRC-7, "SRS Component Parts Location"

.

DTC Logic

INFOID:0000000009882917

DTC DETECTION LOGIC 

With CONSULT

Without CONSULT

CONSULT name

DTC

DTC detecting condition

Repair order

OCCUPANT SENS C/U

[UNIT FAIL]

B1017 The OCS control unit is malfunctioning.

1.

Replace the RH front seat cushion assembly.  
Do not disassemble the seat cushion assem-
bly.

B1021

B1020

The OCS control unit is malfunctioning.

1.

Replace the harness if it has visible damage.

2.

Replace the RH front seat cushion assembly.  
Do not disassemble the seat cushion assem-
bly.

3.

Replace the RH front seat belt assembly.

OCCUPANT SENS

[UNIT FAIL]

B1018

The OCS sensor is malfunctioning.

1.

Visually check the wiring harness connection 
to the OCS sensor.

2.

Replace the RH front seat cushion assembly.  
Do not disassemble the seat cushion assem-
bly.

BELT TENSION SENS

[UNIT FAIL]

B1019

The belt tension sensor is malfunctioning.

1.

Visually check the wiring harness connection.

2.

Replace the harness if it has visible damage.

3.

Replace the RH front seat belt assembly.

4.

Replace the RH front seat cushion assembly.  
Do not disassemble the seat cushion assem-
bly.

5.

Replace the related harness.

OCCUPANT SENS C/U

[COMM FAIL]

B1022

Communication between the OCS control 
unit and the air bag diagnosis sensor unit is 
interrupted.

1.

Visually check the wiring harness connection.

2.

Replace the harness if it has visible damage.

3.

Replace the RH front seat cushion assembly.  
Do not disassemble the seat cushion assem-
bly.

4.

Replace the air bag diagnosis sensor unit.

5.

Replace the related harness.

WHIA0211E

SRC-56

< DTC/CIRCUIT DIAGNOSIS >

B1017 – B1022 OCCUPANT CLASSIFICATION SYSTEM

DTC CONFIRMATION PROCEDURE (With CONSULT)

1.

INSPECTION START

Turn ignition switch ON.

>> GO TO 2.

2.

CHECK SELF-DIAG RESULT

Check for the DTC on CONSULT.
Is the DTC detected?

YES

>> Refer to 

SRC-56, "Diagnosis Procedure (Component Diagnosis)"

.

NO

>> Inspection End.

DTC CONFIRMATION PROCEDURE (Without CONSULT)

NOTE:

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

1.

IGNITION SWITCH

Turn ignition switch ON.

>> GO TO 2

2.

IGNITION SWITCH

After air bag warning lamp lights for 7 seconds, turn ignition switch OFF within 1 second.

>> GO TO 3

3.

WAIT TIME

Wait more than 3 seconds.

>> GO TO 4

4.

REPEAT STEPS

Repeat steps 1 to 3 twice.

>> GO TO 5

5.

IGNITION SWITCH

Turn ignition switch ON.

>> GO TO 6

6.

DIAGNOSTIC MODE

SRS system is now in diagnostic mode and AIR BAG warning lamp flashes. Refer to 

SRC-62, "Trouble Diag-

nosis without CONSULT"

.

>> END

Diagnosis Procedure (Component Diagnosis)

INFOID:0000000009882918

Recheck SRS after each corrective action.

1.

CHECK CURRENT DTC

Does CONSULT indicate B1018, B1019, B1020 or B1022?
YES or NO

YES

>> GO TO 2

NO

>> GO TO 13

B1017 – B1022 OCCUPANT CLASSIFICATION SYSTEM

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2.

HARNESS CONNECTOR

Is there any visible damage to the OCS sub-harness connector (DTC B1022) or to the belt tension sensor con-

nector (DTC B1019)?
YES or NO

YES

>> Replace the harness.

NO

>> GO TO 3

3.

WIRING HARNESS

Is there any visible damage to the body or seat sub harness?
YES or NO

YES

>> Replace the harness.

NO

>> GO TO 4

4.

CHECK CURRENT DTC

Does CONSULT indicate B1022?
YES or NO

YES

>> GO TO 5

NO

>> GO TO 6

5.

OCS CONTROL UNIT HARNESS CONNECTOR

Is the OCS control unit or body harness connector disconnected?
YES or NO

YES

>> Connect the harness.  Clear the DTC.

NO

>> GO TO 13

6.

CHECK CURRENT DTC

Does CONSULT indicate B1018?
YES or NO

YES

>> GO TO 7

NO

>> GO TO 8

7.

OCS SENSOR HARNESS CONNECTOR

Is the OCS sensor harness connector disconnected?
YES or NO

YES

>> Connect the harness.  Clear the DTC.

NO

>> GO TO 8

8.

CHECK CURRENT DTC

Does CONSULT indicate B1020?
YES or NO

YES

>> GO TO 9

NO

>> GO TO 10

9.

BELT TENSION SENSOR

Inspect the belt tension sensor, belt tension sensor connector and harness.
Are the inspection results normal?

YES

>> GO TO 10

NO

>> GO TO 12

10.

CHECK CURRENT DTC

Does CONSULT indicate B1019?
YES or NO

YES

>> GO TO 11

NO

>> GO TO 12

11.

BELT TENSION SENSOR HARNESS CONNECTOR

SRC-58

< DTC/CIRCUIT DIAGNOSIS >

B1017 – B1022 OCCUPANT CLASSIFICATION SYSTEM

Is the belt tension sensor harness connector disconnected?
YES or NO

YES

>> Connect the harness.  Clear the DTC.

NO

>> GO TO 12

12.

REPLACE RH FRONT SEAT BELT ASSEMBLY

Replace the RH front seat belt assembly.

>> GO TO 13

13.

REPLACE RH FRONT SEAT CUSHION ASSEMBLY

Replace the RH front seat cushion assembly.  Refer to 

SE-34, "Removal and Installation - Front Seat Assem-

bly"

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>> GO TO 14

14.

AIR BAG DIAGNOSIS SENSOR UNIT

Replace the air bag diagnosis sensor unit.  Refer to 

SR-17, "Removal and Installation"

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>> END.