Kia Sedona (2008 year). Instruction — part 29

Fig. 68: Scan Tool Display - Actuation Test
Courtesy of KIA MOTORS AMERICA, INC.

5. Does a inlet valve operate normally?

YES



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

NO



Go to "COMPONENT INSPECTION" procedure.

COMPONENT INSPECTION

Refer to DTC C2308.

VERIFICATION OF VEHICLE REPAIR

Refer to DTC C1101.

DTC C2366 TCS VALVE PRIMARY (USV1) ERROR; DTC C2370 TCS VALVE SECONDARY (USV2)
ERROR; DTC C2372 ESC VALVE 1 (HSV1) ERROR; DTC C2374 ESC VALVE 2 (HSV2) ERROR

COMPONENT LOCATION

Refer to DTC C1235.

GENERAL DESCRIPTION

The HECU is composed of an ECU (Electronic Control Unit) and an HCU (Hydraulic Control Unit), so the

2008 Kia Sedona

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

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HECU hardware includes all solenoid valves inside the unit as well as the ECU. Solenoid valves are switched to
ON, OFF by HECU when the ABS is activated. Solenoid valves function is to increase, decrease or maintain
the hydraulic pressure supplied to a brake caliper.

DTC DESCRIPTION

The HECU monitors the operation of the valves by checking the drive circuit of the solenoid valves, and then
sets this code when the unexpected drive voltage is detected. For example, the HECU sets the OTC if the
electrical feedback signal does not match the actuation signal for the corresponding valve.

DTC DETECTING CONDITION

DTC DETECTING CONDITION CHART

Item

Detecting Condition

Possible cause

DTC strategy



Voltage monitoring



Inoperative HECU

Case 1

Monitoring Period



Once after ignition on at
standstill if the BLS is off



At vehicle speed > or = 15
km/h if the BLS is on.

Enable Conditions



The test actuates all valves
in series to detect shorts or
shunts between the valve
lines. Faults are detected if
there is an error during the
test.

Case 2

Monitoring Period



The drift test executes only
once during an ignition
Cycle. The test is triggered
if the following conditions
are fulfilled: 10 min after
power up or end of control

1. No BLS is applied

2. Brake pressure is < 10

bar

3. Vehicle speed > 15

km/h

4. Vehicle acceleration >

0.5 m/s

2

5. Supply voltage > 11

volts.



The drift test is executed
only once during an ignition
Cycle. If it detects partly

2008 Kia Sedona

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

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MONITOR ACTUATION TEST

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

2. Ignition "ON" & Engine "OFF".

3. Select the "Actuation Test" mode on the scan tool.

4. Inspect operating status of inlet valve with Actuation Test.

Specification: It' s normal if operating sound is heard.

Fig. 69: Scan Tool Display - Actuation Test
Courtesy of KIA MOTORS AMERICA, INC.

5. Does a inlet valve operate normally?

YES

Enable Conditions

shorted valve coils, almost
inoperative coils or
malfunction of the valve
driver, a failure is
recognized.

Fail Safe



Valve cannot be actuated or
valve is incorrectly actuated.
This may result in locked
wheels or wheels without
pressure.



ABS/EBD/ESC function is
prohibited.



ABS/EBD/ESC warning
lamp is turned ON.

2008 Kia Sedona

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

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

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

NO



Go to "COMPONENT INSPECTION" procedure.

COMPONENT INSPECTION

Refer to DTC C2308.

VERIFICATION OF VEHICLE REPAIR

Refer to DTC C1101.

DTC C2402 MOTOR-ELECTRICAL

COMPONENT LOCATION

Refer to DTC C1235.

GENERAL DESCRIPTION

The HECU supplies battery power to the electric motor with a motor relay which is controlled by the Electronic
Control Unit (ECU). The electric motor pump supplies hydraulic pressure to all wheel brake calipers by
operating the piston inside the pump.

DTC DESCRIPTION

The HECU monitors the pump motor relay or fuse open, open or short in motor or motor lock and then sets this
code if a malfunction is detected. Warning lamp is turned OFF unless additional faults are detected when the IG
KEY is turned ON again, and wheel speed is more than 15 km/h.

DTC DETECTING CONDITION

DTC DETECTING CONDITION CHART

Item

Detecting Condition

Possible cause

DTC strategy



Voltage monitoring

Monitoring Period



Stop monitor is active if
the pump is off i.e. not
actuation and no
Slowdown.

Enable Conditions



A failure is detected if the
pump motor voltage > 2.0
V for more than 1 s.

2008 Kia Sedona

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

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© 2006 Mitchell Repair Information Company, LLC.