B1428

Description


DTC B1428 SEAT BELT BUCKLE SWITCH LH

The air bag diagnosis sensor unit monitors the seat belt buckle switch LH status. If the control unit detects an open or short condition in the circuit, it will set the DTC.

PART LOCATION

Refer to "Component Parts Location" Locations.


DTC Logic


DTC DETECTION LOGIC

With CONSULT





Without CONSULT






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 "Diagnosis Procedure" .
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 "Flash Code Index" Manufacturer Code Charts.
-END


Diagnosis Procedure


1. SEAT BELT WARNING LIGHT

Turn ignition switch ON.
Does the seat belt warning lamp stay on after lamp check?
YES- GO TO 2
NO- - Check 10A fuse [No. 13, located in the fuse block (J/B)].
- Check seat belt buckle switch LH.
- Check harness between combination meter and seat belt buckle switch LH.
- Check harness between seat belt buckle switch LH and ground.
- Check harness between combination meter and air bag diagnosis sensor unit.
- Check combination meter. Refer to "Fail-Safe" Fail Safe.

2. SEAT BELT BUCKLE LH

Fasten the seat belt buckle LH.
Does the seat belt warning lamp go OFF?
YES- Check harness between combination meter and air bag diagnosis sensor unit.
NO- - Check seat belt buckle switch LH.
- Check harness between combination meter and seat belt buckle switch LH.
- Check harness between combination meter and air bag diagnosis sensor unit.