Kia Sedona (2008 year). Manual - part 71

Fig. 79: Seat Belt Buckle Switch - Schematic Diagram 

SPECIFICATION 

SEAT BELT BUCKLE SWITCH CURRENT SPECIFICATION 

TERMINAL & CONNECTOR INSPECTION 

Refer to TERMINAL & CONNECTOR INSPECTION. 

INSPECTION PROCEDURE 

1. PREPARATION 

Refer to PREPARATION OF INSPECTION. 

2. 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) 

BS Status

Current (mA)

Related DTC

Open or Short to Battery

< 2.98

B1511, B1513

Unbuckled

4-7

 

Defect

8.9-9.7

B1515, B1516

Buckled

12-18

 

Short or Short to Ground

> 22.0

B1512, B1514

 

2008 Kia Sedona EX 

2008 RESTRAINTS Troubleshooting (Airbag) - Sedona

  

Microsoft 

 

Monday, May 24, 2010 3:55:02 PM

Page 87 

© 2006 Mitchell Repair Information Company, LLC. 

2. Is the measured current within specification? 

YES  



Go to next stop.  

NO  



Replace the BS.  

3. CLEAR THE DTC AND CHECK THE VEHICLE AGAIN 

Refer to CLEAR THE DTC AND CHECK THE VEHICLE AGAIN. 

DTC B1620 SUPPLEMENTAL RESTRAINT SYSTEM CONTROL MODULE INTERNAL FAULT 
(REPLACE SRSCM) 

DTC DESCRIPTION 

The Supplemental Restraint System Control Module (SRSCM) runs diagnostics to monitor the condition of its 
internal circuits and all external components in the restraint system. If a fault is detected in the electronic 
accelerometer or in the microprocessor, the SRSCM will inhibit deployment to minimize the risk of inadvertent 
deployments. 

Once an internal fault is qualified, the internal fault is latched and warning lamp will be turned on. If an internal 
fault is qualified, the SRSCM must be replaced. The Hi-Scan tool can't clear an internal fault. All internal faults 
are DTC B1620. 

DTC DETECTING CONDITION 

DTC DETECTING CONDITION 

INSPECTION PROCEDURE 

If the above mentioned DTC is confirmed it can't be cleared by Hi-Scan tool, the SRSCM should be replaced. 

DTC B1650 CRASH RECORDED - FRONTAL (REPLACE SRSCM); DTC B1651 CRASH 
RECORDED - DRIVER SIDE (REPLACE SRSCM); DTC B1652 CRASH RECORDED - PASSENGER 
SIDE (REPLACE SRSCM); DTC B1655 CRASH RECORDED - PASSENGER SIDE WITH PAB 
INHIBITED (REPLACE SRSCM); DTC B1657 CRASH RECORDED - BELT PRETENSIONER 
ONLY; DTC B1658 BELT PRETENSIONER 6 TIMES DEPLOYMENT (REPLACE SRSCM); DTC 
B1670 CRASH RECORDED IN FULL STAGE - FRONTAL (REPLACE SRSCM) 

DTC

Condition

Probable 

cause

B1620



SRSCM internal fault: acceleration sensor, microcomputer power supply, 
watchdog etc  



SRSCM  

 

2008 Kia Sedona EX 

2008 RESTRAINTS Troubleshooting (Airbag) - Sedona

  

Microsoft 

 

Monday, May 24, 2010 3:55:02 PM

Page 88 

© 2006 Mitchell Repair Information Company, LLC. 

DTC DESCRIPTION 

When a deployment of any restraint system for seat belt pretensioner and frontal and side air bags occurs, or 
when a rear crash is detected, the crash output is activated. The purpose of this output is to signal the IPM 
(Instrument Panel Module) in the vehicle to unlock the vehicle doors. If a crash output is in progress, a second 
crash output signal will not be sent unless the first one is completed. The SRSCM doesn't perform diagnostics 
on the crash output function. After a frontal or side crash event is sensed and algorithm makes firing decision, 
above mentioned crash record is stored after squib deployment. 

DTC DETECTING CONDITION 

DTC DETECTING CONDITION 

SCHEMATIC DIAGRAM 

Fig. 80: Instrument Panel Module - Schematic Diagram 

INSPECTION PROCEDURE 

If the above mentioned DTC is confirmed it can't be cleared by Hi-Scan tool except for the B1657 and the 
SRSCM should be replaced. However, for the DTC B1657, Belt pretensioner only deployment, it can be erased 
for 5 times and the SRSCM can be reusable. If the deployment of Belt pretensioner reaches to 6 times, the 
SRSCM will set DTC B1658 and the SRSCM should be replaced accordingly. 

DTC B1722 CURTAIN AIRBAG [REAR-DRIVER] RESISTANCE TOO HIGH; DTC B1723 CURTAIN 
AIRBAG [REAR-DRIVER] RESISTANCE TOO LOW; DTC B1726 CURTAIN AIRBAG [REAR-

DTC

Condition

Probable cause

B1650 
B1651 
B1652 
B1655 
B1657 
B1658 
B1670



Frontal crash  



Side crash  



Seat belt pretensioner only deployed  



SRSCM  



Front Impact Sensor  



Side Impact Sensor  



Seat Belt Pretensioner  

 

2008 Kia Sedona EX 

2008 RESTRAINTS Troubleshooting (Airbag) - Sedona

  

Microsoft 

 

Monday, May 24, 2010 3:55:02 PM

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© 2006 Mitchell Repair Information Company, LLC. 

PASSENGER] RESISTANCE TOO HIGH; DTC B1727 CURTAIN AIRBAG [REAR-PASSENGER] 
RESISTANCE TOO LOW 

DTC DESCRIPTION 

The CAB squib circuit consists of the SRSCM and two Curtain Airbags (CAB). The above DTC is recorded 
when the CAB resistance too high or low is detected in the CAB squib circuit. 

DTC DETECTING CONDITION 

DTC DETECTING CONDITION 

SCHEMATIC DIAGRAM 

Fig. 81: Curtain Airbag - Schematic Diagram 

SPECIFICATION 

CAB resistance: 1.6-4.7 ohms 

TERMINAL & CONNECTOR INSPECTION 

DTC

Condition

Probable cause

B1722 
B1723 
B1726 
B1727



Too high or low resistance between CAB high (+) 
and CAB low (-)  



Curtain Airbag (CAB) Malfunction  



SRSCM Malfunction  



Open or short circuit on wiring 
harness  



Curtain Airbag (CAB) squib  



SRSCM  

 

2008 Kia Sedona EX 

2008 RESTRAINTS Troubleshooting (Airbag) - Sedona

  

Microsoft 

 

Monday, May 24, 2010 3:55:02 PM

Page 90 

© 2006 Mitchell Repair Information Company, LLC.