Kia Sedona (2008 year). Manual - part 63



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 of STPS and 30 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 CLEAR THE DTC AND CHECK THE VEHICLE AGAIN. 

DTC B1388 SEAT TRACK POSITION SENSOR [DRIVER] OPEN OR SHORT TO BATTERY 

DTC DESCRIPTION 

The Seat Track Position Sensor (STPS) circuit consists of the SRSCM and STPS. The SRSCM sets above DTC 
(s) if it detects open or short to battery line 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 

DTC DETECTING CONDITION 

SCHEMATIC DIAGRAM 

DTC

Condition

Probable cause

B1388



Open between STPS and SRSCM  



Short to battery line between STPS and 
SRSCM  



STPS Malfunction  



SRSCM Malfunction  



Open or short to battery line circuit on 
wiring harness  



STPS  



SRSCM  

 

2008 Kia Sedona EX 

2008 RESTRAINTS Troubleshooting (Airbag) - Sedona

  

Microsoft 

 

Monday, May 24, 2010 3:55:01 PM

Page 55 

© 2006 Mitchell Repair Information Company, LLC. 

Fig. 50: Seat Track Position Sensor - Schematic Diagram 

SPECIFICATION 

SEAT TRACK POSITION SENSOR CURRENT SPECIFICATION 

TERMINAL & CONNECTOR INSPECTION 

Refer to TERMINAL & CONNECTOR INSPECTION. 

INSPECTION PROCEDURE 

1. PREPARATION 

Refer to PREPARATION OF INSPECTION. 

2. CHECK OPEN CIRCUIT 

1. Disconnect the STPS connector.  

2. Measure resistance between the terminal 1 of STPS harness connector and the terminal 30 of 

SRSCM harness connector (B). 

specification (resistance): below 1 ohms

STPS Status

Current (mA)

Related DTC

Open or Short to Battery

< 3.98

B1388

Forward

5-7

 

Defect

8.62-9.94

B1389

Rearward

12-17

 

Short or Short to Ground

> 20.83

B1387

 

2008 Kia Sedona EX 

2008 RESTRAINTS Troubleshooting (Airbag) - Sedona

  

Microsoft 

 

Monday, May 24, 2010 3:55:01 PM

Page 56 

© 2006 Mitchell Repair Information Company, LLC. 

Fig. 51: Checking Open Circuit 

3. Is the measured resistance within specification? 

YES  



Check short to ground.  

NO  



Repair the open circuit on wiring harness between the STPS and the SRSCM.  

3. CHECK SHORT TO BATTERY LINE 

1. Connect the battery negative cable to the battery.  

2. Turn the ignition switch to ON.  

3. Measure voltage between the terminal 1 of STPS harness connector and chassis ground. 

specification (voltage): Approximately 0 V 

Fig. 52: Checking Short To Battery Line 

4. Is the measured voltage within specification? 

YES  

 

2008 Kia Sedona EX 

2008 RESTRAINTS Troubleshooting (Airbag) - Sedona

  

Microsoft 

 

Monday, May 24, 2010 3:55:01 PM

Page 57 

© 2006 Mitchell Repair Information Company, LLC. 



CHECK THE SEAT TRACK POSITION SENSOR (STPS).  

NO  



Repair the short to battery line circuit on wiring harness between the STPS and the SRSCM.  

4. CHECK THE SEAT TRACK POSITION SENSOR (STPS) 

1. Measure current between the terminal 1 of STPS and 30 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.  

5. CLEAR THE DTC AND CHECK THE VEHICLE AGAIN 

Refer to CLEAR THE DTC AND CHECK THE VEHICLE AGAIN. 

DTC B1389 SEAT TRACK POSITION SENSOR [DRIVER] DEFECT 

DTC DESCRIPTION 

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

DTC DETECTING CONDITION 

DTC DETECTING CONDITION 

SCHEMATIC DIAGRAM 

DTC

Condition

Probable cause

B1389



STPS Malfunction  



SRSCM Malfunction  



STPS  



SRSCM  

 

2008 Kia Sedona EX 

2008 RESTRAINTS Troubleshooting (Airbag) - Sedona

  

Microsoft 

 

Monday, May 24, 2010 3:55:01 PM

Page 58 

© 2006 Mitchell Repair Information Company, LLC.