B1018

B1018 OCCUPANT SENS

Description


DTC B1018 [UNIT FAIL] OCCUPANT SENS

Suppresses the deployment of passenger air bag when the condition of passenger seat is empty or child and child-seat. And turns on cut-off telltale lamp when the condition of passenger seat is child-seat and child. In case of malfunction the blinking of the SRS air bag warning lamp reports the malfunction to driver and by the on board self-diagnosis system or electro-diagnosis tester CONSULT can detect the cause.

OPERATION

The unit classifies occupant in passenger seat and transmits it to Occupant Classification System (OCS) control unit.

STRUCTURE

Plural sensors are installed in the sensor mat to prevent incorrect sensing induced by the sitting position.

INSTALLATION

Seat sensor mat is installed in the passenger seat cushion.


DTC Logic


DTC DETECTION LOGIC

With CONSULT
DTC No. Index ("SELF-DIAG [CURRENT]"), ("SELF-DIAG [PAST]" or "TROUBLE DIAG RECORD")






DTC CONFIRMATION PROCEDURE (With CONSULT)


1. INSPECTION START

Turn ignition switch ON.
- GO TO 2.

2. CHECK SELF-DIAG RESULT

Check the screen of CONSULT.
Is malfunctioning part detected?
YES- .
NO-INSPECTION END.

DTC CONFIRMATION PROCEDURE (Without CONSULT)

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

1. INSPECTION START

Turn ignition switch ON.
- GO TO 2.

2. CHECK AIR BAG WARNING LAMP

Check the warning lamp status.
Is malfunctioning part detected?
YES- Testing and Inspection.
NO-INSPECTION END.


Diagnosis Procedure


With CONSULT


WARNING:
- Before servicing, turn ignition switch OFF, disconnect both battery terminals and wait at least 3 minutes. (To discharge backup capacitor.)
- Do not 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- Repair or replace harness connectors.

2. CHECK WIRING HARNESS

Check the wiring harness externals.
Is the inspection result normal?
YES- GO TO 3.
NO- Repair or replace wiring harness.

3. CHECK OCCUPANT CLASSIFICATION SYSTEM SENSOR

1.Replace occupant classification system sensor. (passenger side seat cushion assembly.)
2.Check the screen of CONSULT.
Is the inspection result normal?
YES-INSPECTION END.
NO- Check the intermittent incident. Intermittent Incident.