Restraint Troubleshooting

B1512

B1514

DTC Description

The Seat Belt Buckle Switch (BS) circuit consists of the SRSCM and two BS. The SRSCM sets above DTC(s) if it detects short or short to ground on the BS circuit. This system decides whether the driver or passenger seat belt is buckled or not.

DTC Detecting Condition






Specification






Schematic Diagram






Terminal & Connector Inspection
Refer to the DESCRIPTION in this TROUBLESHOOTING part.

Inspection Procedure

1. PREPARATION
Refer to the DESCRIPTION in this TROUBLESHOOTING part.

2. CHECK SHORT OR SHORT TO GROUND
(1) Disconnect the BS connector.
(2) Measure resistance between the terminal 3 of BS harness connector and chassis ground.
(3) Measure resistance between the terminal 3 and 4 of BS harness connector.

Specification (Resistance) : Infinite






(4) Is the measured resistance within specification?
Yes
(5) - Go to next step.
No
- Repair the short or short to ground circuit on wiring harness between the BS and the SRSCM.

3. CHECK THE SEAT BELT BUCKLE SWITCH (BS)
(1) Measure current between the terminal 3 of BS and 32(31) of SRSCM harness connector(B).

Specification (current) : 12 ~ 18 mA (Buckled status), 4 ~ 7 mA (Unbuckled status)

(2) Is the wiring harness normal?
Yes
- Go to next stop.
No
- Replace the BS.

4. CLEAR THE DTC AND CHECK THE VEHICLE AGAIN
Refer to the DESCRIPTION in this TROUBLESHOOTING part.