Kia Sedona (2008 year). Manual - part 26

VERIFICATION OF VEHICLE REPAIR 

Refer to DTC C1101. 

DTC C1625 CAN TIME-OUT ABS/TCS/ESC 

COMPONENT LOCATION 

Refer to DTC C1235. 

GENERAL DESCRIPTION 

Refer to DTC C1605. 

DTC DESCRIPTION 

The HECU checks the CAN communication lines for normal ESC control, and sets this code if a CAN message 
is not transmitted within predefined time. 

DTC DETECTING CONDITION 

DTC DETECTING CONDITION CHART 

COMPONENT INSPECTION 

1. Ignition "OFF".  

2. Engine "ON".  

3. Does warning lamp remain On? 

YES  



Substitute with a known-good HECU and check for proper operation. If problem is corrected, 

Item

Detecting Condition

Possible cause

DTC strategy



CAN massage monitoring  



Inoperative HECU  

Monitoring Period



Continuous  

Enable Conditions



Faults are detected if CAN 
message was not transmitted 
on time by the CAN 
controller of HECU.  

Fail Safe



Inhibit the ESC control and 
ABS/EBD control is 
available. Meanwhile, stop 
checking the ESC switch 
failure under the ESC 
control.  

 

2008 Kia Sedona 

2008 BRAKES ABS (Anti-Lock Brake System) - Sedona

  

Microsoft 

 

Saturday, May 22, 2010 6:52:43 PM

Page 101 

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replace HECU and then go to "VERIFICATION OF VEHICLE REPAIR" procedure. 

NO  



Fault is intermittent caused by inoperative HECU or was repaired and HECU memory was not 
cleared. Go to the applicable troubleshooting procedure.  

VERIFICATION OF VEHICLE REPAIR 

Refer to DTC C1101. 

DTC C1626 IMPLAUSIBLE CONTROL 

COMPONENT LOCATION 

Refer to DTC C1235. 

GENERAL DESCRIPTION 

The HECU send requirement data, such as Torque reduction, the number of fuel cut cylinders, and TCS control 
requests, to the PCM (ECM & TCM) through CAN bus line. The PCM (ECM) performs fuel cut functions 
according to requests from the HECU and retards ignition timing by torque reduction requests. The PCM 
(TCM) maintains current gear positions during TCS control time, in order not to increase power which causes a 
Kickdown shift. 

DTC DESCRIPTION 

Under normal conditions, the inlet valves of all four wheels are not closed during control for longer than 1.28s 
or If the controller requests pressure-hold or pressure-decrease for longer than 1.28s, a fault is detected. The 
ABS/ESC warning lamp is turned ON and the EBD warning lamp is turned OFF. 

DTC DETECTING CONDITION 

DTC DETECTING CONDITION 

Item

Detecting Condition

Possible cause

DTC strategy



Signal monitoring  

Case 1

Monitoring Period



Continuous  

Enable Conditions



If the controller 
requests pressure-
hold or pressure-
decrease for longer 
than 1.28 s, a fault is 
stored.  

Monitoring Period



Continuous (at 
vehicle reference 
speed > 6 m/s, no 

 

2008 Kia Sedona 

2008 BRAKES ABS (Anti-Lock Brake System) - Sedona

  

Microsoft 

 

Saturday, May 22, 2010 6:52:43 PM

Page 102 

© 2006 Mitchell Repair Information Company, LLC. 

COMPONENT INSPECTION 

Refer to DTC C1101. 

VERIFICATION OF VEHICLE REPAIR 

Refer to DTC C1101. 

DTC C1702 VARIANT CODING ERROR 

COMPONENT LOCATION 

Refer to DTC C1235. 

GENERAL DESCRIPTION 

The HECU is programmed with a variant code based on the vehicle powertrain configuration. This variant code 
is used to determine the appropriate ESC calculations. 

DTC DESCRIPTION 

The HECU checks the variant code after ignition. If a inappropriate variant code is detected or there is no 
variant code, a fault is detected. 

DTC DETECTING CONDITION 

DTC DETECTING CONDITION 

Case 2

detected under 
voltage and a fault is 
not already detected) 



Inoperative HECU  

Enable Conditions



The monitoring 
reports a failure if 
continuous ESC 
control occurs for a 
time period > = 10 s. 

Fail Safe



The ABS/ESC 
functions are 
inhibited, allow the 
EBD control.  



The ABS/ESC 
warning lamps are 
activated.  

Item

Detecting Condition

Possible cause

DTC strategy



Internal monitoring  

 

2008 Kia Sedona 

2008 BRAKES ABS (Anti-Lock Brake System) - Sedona

  

Microsoft 

 

Saturday, May 22, 2010 6:52:43 PM

Page 103 

© 2006 Mitchell Repair Information Company, LLC. 

MONITOR SCAN TOOL DATA 

VARIANT CODE 

1. Check for improper installation of PCM (ECM & TCM)/ESC.  

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

3. Ignition "ON".  

4. Go in Anti-Lock brake system (figure 1).  

5. Perform variant code.  

6. Disconnect scan tool.  

7. Ignition "OFF" and then ignition "ON". Go to "COMPONENT INSPECTION" Procedure.  

Fig. 64: Scan Tool Display - Current Data 
Courtesy of KIA MOTORS AMERICA, INC.

Monitoring Period



Once during startup.  



Inoperative HECU  



Replacement of PCM 
(ECM & TCM)  

Enable Conditions



During initialization, there is 
no inputed valid variant code. 



No variant code stored in 
EEPROM.  



Received variant code is 
invalid.  



There is a difference between 
preset variant code and 
detected variant code.  

Fail Safe



The ABS/EBD/ESC functions 
are inhibited.  



The ABS/EBD/ESC warning 
lamps are activated.  

 

2008 Kia Sedona 

2008 BRAKES ABS (Anti-Lock Brake System) - Sedona

  

Microsoft 

 

Saturday, May 22, 2010 6:52:43 PM

Page 104 

© 2006 Mitchell Repair Information Company, LLC.