Kia Sedona (2008 year). Manual - part 175

Fig. 138: Measuring Waveform Between Terminal 28 Of IMS And Chassis Ground 
Courtesy of KIA MOTORS AMERICA, INC. 

Fig. 139: Identifying Waveform 
Courtesy of KIA MOTORS AMERICA, INC. 

4. Is the measured voltage within specifications in Fig. 139? 

YES  

Check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, 
or damage. 

Repair or replace as necessary and then go to "VERIFICATION OF VEHICLE REPAIR" 
procedure. 

NO  

Substitute with a known-good power seat slide sensor and check for proper operation. If the 
problem is corrected, replace power seat slide sensor and then go to "VERIFICATION OF 
VEHICLE REPAIR" procedure. 

VERIFICATION OF VEHICLE REPAIR 

 

2008 Kia Sedona EX 

2008 ACCESSORIES & BODY, CAB BCM (Body Control Module) - Sedona

  

Microsoft 

 

Monday, May 24, 2010 4:19:18 PM

Page 169 

© 2006 Mitchell Repair Information Company, LLC. 

Refer to DTC B1954. 

DTC B1957 REAR HEIGHT MOTOR OR SENSOR ERROR 

COMPONENT LOCATION 

Refer to DTC B1954. 

GENERAL DESCRIPTION 

Refer to DTC B1954. 

DTC DESCRIPTION 

The ECM sets DTC B1956 if there's any fault in front height sensor signal. 

DTC DETECTING CONDITION 

DTC DETECTING CONDITION 

MONITOR DTC STATUS 

1. Connect scan tool to Data Link Connector (DLC).  

2. Ignition "ON" & engine "OFF".  

3. Select "Diagnostic Trouble Codes (DTCs) "mode and monitor "DTC Status" parameter.  

4. Is the DTC B1957 present? 

YES  

Go to TERMINAL AND CONNECTOR INSPECTION procedure. 

NO  

Fault is intermittent caused by poor contact in the sensor's and/or ECM's connector or was repaired and 
ECM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending, 
corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to 
"VERIFICATION OF VEHICLE REPAIR" procedure.

Item

Detecting Condition

Possible Cause

DTC Strategy



Check no. of pulse  



Open or short in signal 
harness  



Open or short in power 
harness  



Faulty rear height motor  



Faulty rear height sensor  

Enable Conditions



IGN `ON' & Engine `OFF' & rear 
height s/w `ON'  

Threshold value



6 pulses in 1 sec  

Detecting time



1 sec  

FAIL SAFE

-

 

2008 Kia Sedona EX 

2008 ACCESSORIES & BODY, CAB BCM (Body Control Module) - Sedona

  

Microsoft 

 

Monday, May 24, 2010 4:19:18 PM

Page 170 

© 2006 Mitchell Repair Information Company, LLC. 

TERMINAL AND CONNECTOR INSPECTION 

Refer to DTC B1954. 

SIGNAL CIRCUIT INSPECTION 

1. Check for open in harness 

1. Ignition "OFF".  

2. Measure resistance between terminal "10" of IMS and terminal "3" of power seat recline sensor. 

Specification :Approx. 0 ohms 

Fig. 140: Measuring Resistance Between Terminal 10 Of IMS And Terminal 3 Of Power Seat 
Recline Sensor 
Courtesy of KIA MOTORS AMERICA, INC. 

3. Is the measured resistance within specifications? 

YES  

Go to step 2. 

NO  

Check for open in signal harness. Repair as necessary and go to "VERIFICATION OF 
VEHICLE REPAIR" procedure. 

2. Check for short in harness 

1. Ignition "OFF".  

2. Disconnect rear height motor.  

3. Measure resistance between terminal "10" of IMS and chassis ground. 

Specification :Approx. infinity ohms

 

2008 Kia Sedona EX 

2008 ACCESSORIES & BODY, CAB BCM (Body Control Module) - Sedona

  

Microsoft 

 

Monday, May 24, 2010 4:19:18 PM

Page 171 

© 2006 Mitchell Repair Information Company, LLC. 

Fig. 141: Measuring Resistance Between Terminal 10 Of IMS And Chassis Ground 
Courtesy of KIA MOTORS AMERICA, INC. 

4. Is the measured resistance within specifications? 

YES  

Go to "POWER CIRCUIT INSPECTION" procedure. 

NO  

Check for short in signal harness. Repair as necessary and go to "VERIFICATION OF 
VEHICLE REPAIR" procedure. 

POWER SUPPLY CIRCUIT INSPECTION 

MOTOR POWER CIRCUIT INSPECTION 

1. Check for open in harness 

1. Ignition "OFF"  

2. Disconnect rear height motor.  

3. Measure resistance between terminal "3" of IMS and terminal "2" of power seat recline motor.  

4. Measure resistance between terminal "8" of IMS and terminal "5" of power seat recline motor. 

Specification :Approx. 0 ohms 

 

2008 Kia Sedona EX 

2008 ACCESSORIES & BODY, CAB BCM (Body Control Module) - Sedona

  

Microsoft 

 

Monday, May 24, 2010 4:19:18 PM

Page 172 

© 2006 Mitchell Repair Information Company, LLC.