B2453

DTC Logic


DTC DETECTION LOGIC







DTC CONFIRMATION PROCEDURE


1. SELF-DIAGNOSIS WITH PRE-CRASH SEAT BELT CONTROL UNIT

1.Turn ignition switch ON.
2.Check "Self-diagnostic result" with CONSULT.
Is DTC detected?
YES- Refer to "Diagnosis Procedure" .
NO- INSPECTION END


Diagnosis Procedure


1. CHECK PRE-CRASH SEAT BELT CONTROL UNIT INPUT SIGNAL

1.Turn ignition switch ON.
2.Select "BRK PEDAL SNSR1" and "BRK PEDAL SNSR2" in "DATA MONITOR" mode with CONSULT.
3.Check "BRK PEDAL SNSR1" and "BRK PEDAL SNSR2" indication under the following conditions.





Is the inspection result normal?
YES- GO TO 6.
NO- GO TO 2.

2. CHECK BRAKE PEDAL STROKE SENSOR POWER SUPPLY

1.Turn ignition switch OFF.
2.Disconnect brake pedal stroke sensor harness connector.
3.Check voltage between brake pedal stroke sensor harness connector and ground.





Is the inspection result normal?
YES- GO TO 4.
NO- GO TO 3.

3. CHECK BRAKE PEDAL STROKE SENSOR POWER SUPPLY CIRCUIT

1.Disconnect pre-crash seat belt control unit (driver side) harness connector.
2.Check continuity between pre-crash seat belt control unit (driver side) harness connector and brake pedal stroke sensor harness connector.





3.Check continuity between pre-crash seat belt control unit (driver side) harness connector and ground.





Is the inspection result normal?
YES- Replace pre-crash seat belt control unit (driver side). Refer to "SEAT BELT RETRACTOR : Removal and Installation" Removal and Installation.
NO- Repair or replace harness or connector.

4. CHECK BRAKE PEDAL STROKE SENSOR CIRCUIT

1.Disconnect pre-crash seat belt control unit (driver side) harness connector.
2.Check continuity between pre-crash seat belt control unit (driver side) harness connector and brake pedal stroke sensor harness connector.





3.Check continuity between pre-crash seat belt control unit harness connector (driver side) and ground.





Is the inspection result normal?
YES- GO TO 5.
NO- Repair or replace harness or connector.

5. CHECK BRAKE PEDAL STROKE SENSOR

Refer to "Component Inspection" .
Is the inspection result normal?
YES- GO TO 6.
NO- Replace brake pedal stroke sensor. Refer to "Removal and Installation" Removal and Installation.

6. CHECK INTERMITTENT INCIDENT

Refer to "Intermittent Incident" Intermittent Incident.
- INSPECTION END


Component Inspection


COMPONENT PARTS INSPECTION


1. CHECK BRAKE PEDAL STROKE SENSOR

1.Turn ignition switch OFF.
2.Disconnect brake pedal stroke sensor connector.
3.Check resistance between brake pedal stroke sensor terminal as per the following.





Is the inspection result normal?
YES- INSPECTION END
NO- Replace brake pedal stroke sensor. Refer to "Removal and Installation" Removal and Installation.