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Home >> Toyota >> 2004 >> Highlander Limited, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 920 (SRS Airbag Control System) >> DTC/Circuit Diagnosis >> DTC B1017 - B1022: Occupant Classification System >> Diagnosis Procedure (Component Diagnosis)

Diagnosis Procedure (Component Diagnosis)

WARNING: This page is about a different car, the 2013 Nissan Armada. However, it is still accessible from the selected car via links, so may be relevant.

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

  2. HARNESS CONNECTOR 

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

    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 "REMOVAL AND INSTALLATION - FRONT SEAT ASSEMBLY ".

    : GO TO 14

  14. AIR BAG DIAGNOSIS SENSOR UNIT 

    Replace the air bag diagnosis sensor unit. Refer to "REMOVAL AND INSTALLATION ".

    :END