Kia Sedona (2008 year). Manual - part 385

FAILURE DIAGNOSIS 

1. In principle, ESC and TCS controls are prohibited in case of ABS failure.  

2. When ESC or TCS fails, only the failed system control is prohibited.  

3. However, when the solenoid valve relay should be turned off in case of ESC failure. The ABS/EBD/ESC 

functions are inhibited. The ABS/EBD/ESC warning lamps are activated.  

4. Information on ABS fail-safe is identical to the fail-safe in systems where ESC is not installed.  

MEMORY OF FAIL CODE 

1. It keeps the code as far as the backup lamp power is connected. (O)  

2. It keeps the code as long as the HCU power is on. (X)  

FAILURE CHECKUP 

1. Initial checkup is performed immediately after the HECU power on.  

2. Valve relay checkup is performed immediately after the IG2 ON.  

3. It executes the checkup all the time while the IG2 power is on.  

4. Initial checkup is made in the following cases. 

1. When no failure is detected  

2. When ABS and ESC are not in control.  

3. Initial checkup is not made after ECU power on.  

4. If the vehicle speed is over 5 mph (8 km/h) when the brake lamp switch is off.  

5. When the vehicle speed is over 24.8 mph (40 km/h).  

5. Though, it keeps on checkup even if the brake lamp switch is on.  

6. When performing ABS or ESC control before the initial checkup, stop the initial checkup and wait for the 

HECU power input again.  

7. Judge failure in the following cases. 

1. When the power is normal.  

20

Acceleration Sensor 

Signal

Offset voltage :2.5 V 

range: 0.35 V-4.65 V (-1.8 g-1.8 g)

IG ON

15 Yaw Rate Sensor Ground

GND LEVEL

Always

35

CAN High

not communicating:2.5 ± 0.5 V 

communication :

IG ON

14

CAN Low

30 BRAKE LIGHT SWITCH

voltage (High): 0.8 * IG ON more 

voltage (Low): 0.3 * IG ON lower

BRAKE ON/OFF

 

2008 Kia Sedona 

2008 BRAKES ESP (Electronic Stability Program) - Sedona

  

Microsoft 

 

Saturday, May 22, 2010 6:53:50 PM

Page 18 

© 2006 Mitchell Repair Information Company, LLC. 

2. From the point in which the vehicle speed reaches 4.9 mph (8 km/h) after HECU power on.  

COUNTERMEASURES IN FAIL 

1. Shut the system down and perform the following actions and wait for HECU power OFF.  

2. Turn the valve relay off.  

3. Do not perform any ABS/TCS/ESC functions until normal operating condition is restored.  

WARNING LAMP ON 

1. ABS warning lamp turns on when ABS is malfunctioning.  

2. ESC operation lamp turns on when ESC is malfunctioning.  

When power voltage and valve relay voltage are abnormal, input/output related failure judgment is not made. 

YAW-RATE SENSOR & G-SENSOR 

DESCRIPTION 

1. The yaw-rate & lateral G sensor is applied for the ESC system.  

2. The yaw-rate is the angular velocity, when a vehicle turns a corner, and the lateral G is the acceleration to 

move a vehicle out of the way when cornering.  

3. The sensor is located in the crash pad lower floor on vehicle.  

Fig. 21: Identifying Yaw-Rate & Lateral G Sensor 
Courtesy of KIA MOTORS AMERICA, INC. 

SPECIFICATION 

YAW-RATE & LATERAL G SENSOR SPECIFICATION 

Description

Specification

Remark

 

2008 Kia Sedona 

2008 BRAKES ESP (Electronic Stability Program) - Sedona

  

Microsoft 

 

Saturday, May 22, 2010 6:53:50 PM

Page 19 

© 2006 Mitchell Repair Information Company, LLC. 

OUTPUT CHARACTERISTIC 

Fig. 22: Yaw-Rate & Lateral G Sensor Output Characteristics 
Courtesy of KIA MOTORS AMERICA, INC. 

CIRCUIT DIAGRAM (YAW-RATE & LATERAL G SENSOR) 

Nominal supply voltage

11.5-12.5 V

 

Supply voltage range

8-16 V

 

Supply current

Max. 120 mA

Type. 75 mA

Reference Voltage Output

2.464-2.536 V

Type. 2.5 V

Operating temperature range

-40-85 °C

 

Yaw-late sensor

Measurement range

+w direction, left turn

Min.100 °/s

Type. 111 °/S

-w direction, right turn

Min.100 °/s

Type. 111 °/S

Non-linearity

 

-1-1 %

Offset (within life, within operating temperature)

3.75 °/S

 

Upper cut-off frequency

Min. 45 Hz

Type. 60 Hz

Lateral G sensor

Measurement range

+y direction, left turn

Min.1.8 g

Type. 2 g

-y direction, right turn

Min. -1.8 g

Type. 2 g

Non-linearity

-4-4 %

 

Offset (within life, within operating temperature)

-0.09-0.09 g

 

Upper cut-off frequency

Min. 20 Hz

Type. 40 Hz

 

2008 Kia Sedona 

2008 BRAKES ESP (Electronic Stability Program) - Sedona

  

Microsoft 

 

Saturday, May 22, 2010 6:53:50 PM

Page 20 

© 2006 Mitchell Repair Information Company, LLC. 

Fig. 23: Yaw-Rate & Lateral G Sensor Circuit Diagram 
Courtesy of KIA MOTORS AMERICA, INC. 

ESC SWITCH 

DESCRIPTION 

1. The ESC OFF switch is for the user to turn off the ESC system.  

2. The ESC OFF lamp is on when ESC OFF switch is engaged.  

INSPECTION 

1. Remove the ESC OFF switch from the switch panel on the crash pad of the driver's side. 

Fig. 24: Identifying ESC OFF Switch Terminals

 

2008 Kia Sedona 

2008 BRAKES ESP (Electronic Stability Program) - Sedona

  

Microsoft 

 

Saturday, May 22, 2010 6:53:50 PM

Page 21 

© 2006 Mitchell Repair Information Company, LLC.