B1018
B1017 - B1022 Occupant Classification System
Description
DTC B1017 - B1022 OCS
The OCS control unit is wired to the air bag diagnosis sensor unit. The air bag diagnosis sensor unit will monitor the OCS for failures and interruptions in communication between the OCS control unit and the air bag diagnosis sensor unit.
Part Location
Refer to [SRS Component Parts Location] Locations.
DTC Logic
DTC Detection Logic
With SDT
Without SDT
DTC Confirmation Procedure (With SDT)
1. INSPECTION START
Turn ignition switch ON.
GO TO 2.
2. PERFORM DTC CHECK
Check for the DTC on SDT.
Is the DTC detected?
YES
Refer to "Diagnosis Procedure (Component Diagnosis)".
NO
Inspection End.
DTC Confirmation Procedure (Without SDT)
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 [Diagnosis Sensor Unit: Trouble Diagnosis without SDT] Warning Lamp Flash Code Chart.
END
Diagnosis Procedure (Component Diagnosis)
Recheck SRS after each corrective action.
1. CHECK CURRENT DTC
Does SDT 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 SDT 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 SDT 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 SDT 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 SDT 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 [Front Seat: Removal and Installation] Front Seat Removal and Installation.
GO TO 14
14. AIR BAG DIAGNOSIS SENSOR UNIT
Replace the air bag diagnosis sensor unit. Refer to [Diagnosis Sensor Unit: Removal and Installation] Service and Repair.
END.