Restraint Troubleshooting

B1387

B1390

DTC Description

The Seat Track Position Sensor (STPS) circuit consists of the SRSCM and two STPS. The SRSCM sets above DTC(s) if it detects short or short to ground on the STPS circuit. The "Seat Forward" status currently represents a seat position in which the deployment of the second stage airbag is prohibited.

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 STPS connector.
(2) Measure resistance between the terminal 1(6) of STPS harness connector and chassis ground.
(3) Measure resistance between the terminal 1(6) and 2(5) of STPS harness connector.

Specification(resistance) : infinite






(4) Is the measured resistance within specification?
Yes
- Check the STPS.
No
- Repair or replace the wiring harness between the STPS and the SRSCM.

3. CHECK THE SEAT TRACK POSITION SENSOR (STPS)
(1) Measure current between the terminal 1(6) of STPS and 30(29) of SRSCM.

Specification (current) : 12 ~ 17 mA (Rearward status), 5 ~ 7 mA (Forward status)

(2) Is the measured current within specification?
Yes
- Go to next stop.
No
- Replace the STPS.

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