2007 KIA CARNIVAL ECU

18Voltage for hybrid ECU 1 A500 mA 60200
5,10,17,19 signal wheel speed sensor FL,
FR, RL,RR
6 mA
16 mA 250200 to
ground 1.5M to bat
16,9,6,8 Voltage supply for the active
wheel speed sensor FL,FR,
RL, RR 6 mA
16 mA 250200 to
ground 1.5M to bat
14,24 wheel speed sensor output
(FR, RL) 20 mA
10 mA 250200
11 Diagnostic wire K 6 mA3 mA 250200
22 ABS - warning lamp actuation 30 mA5 mA 250200
12 EBD- warning lamp actuation 30 mA5 mA 250200
20 brake light switch 10 mA5 mA 250200
15 CAN Low 30 mA20 mA 250200
26 CAN High 30 mA20 mA 250200
ABS HECU CONNECTOR Connector terminal SpecificationCondition
Number Description
1 Ground for recirculation pump Current range: Min.10A
Max.20~39A Always
4 Ground for solenoid valves and
ECU Current range: Min.2.5A
Max.5~15A Always
2 Voltage supply for pump motor
Battery voltageAlways
3 Voltage supply for solenoid valves
16 Voltage supply for the active
wheel speed sensor FL,FR, RL, RR Battery voltage
IG ON
9
6
8
5
signal wheel speed sensor FL, FR, RL,RR Voltage(High) : 0.89~1.26 V
Voltage (Low) : 0.44~0.63 V On driving
10
17
19
11
Diagnostic wire K Voltage (High)
≥ 0.8 * IG ON
Voltage (Low) ≤ 0.2 * IG ON On SCAN TOOL
communication
18 Voltage for hybrid ECU Battery voltageKEY ON/OFF
20 Brake light switch Voltage (High)
≥ 0.8 * IG ON
Voltage (Low) ≤ 0.3 * IG ON BRAKE ON/OFF
SENSOR OUTPUT ON SCAN TOOL(ABS) Description AbbreviationUnitRemarks
1 Vehicle speed sensor VEH. SPDKm/h
2 Battery voltage BATT. VOLV
3 FL Wheel speed sensor FL WHEELKm/h

2007 > 2.7L V6 GASOLINE >
DESCRIPTION
This specification applies to HCU(Hydraulic Control Unit) and ECU(Electronic Control Unit) of the HECU.(Hydraulic and
Electronic Control Unit)
This specification is for the wiring design and installation of ABS/TCS/ESC ECU.
This unit has the functions as follows.
a. Input of signal from Pressure sensor, Steering angle sensor, Yaw & Lateral G sensor, the wheel speed sensors
attached to each wheel.
b. Control of braking force / traction force/ yaw moment.
c. Failsafe function.
d. Self diagnosis function.
e. Interface with the external diagnosis tester.
Installation position : engine compartment a. Brake tube length from Master cylinder port to HECU inlet port should be max. 1m
b. The position should not be close to the engine block and not lower than the wheel.
OPERATION
The ECU shall be put into operation by switching on the operating voltage (IGN).
On completion of the initialization phase, the ECU shall be ready for operation.
In the operating condition, the ECU shall be ready, within the specified limits (voltage and temperature), to process the
signals offered by the various sensors and switches in accordance with the control algorithm defined by the software
and to control the hydraulic and electrical actuators.
Wheel Sensor signal processing
The ECU shall receive wheel speed signal from the four active wheel sensors.
The wheel signals are converted to voltage signal by the signal conditioning circuit after receiving current signal from
active wheel sensors and given as input to the MCU.
Solenoid Valve Control
When one side of the valve coil is connected to the positive voltage that is provided through the valve relay and the
other side is connected to the ground by the semiconductor circuit, the solenoid valve goes into operation.
The electrical function of the coils are always monitored by the valve test pulse under normal operation conditions.
Voltage limits
a.Overvoltage
When overvoltage is detected(above 16.8 V), the ECU switches off the valve relay and shuts down the system.
When voltage is returned to operating range, the system goes back to the normal condition after the initialization
phase.
b. Undervoltage
In the event of undervoltage(below 9.3 V), ABS control shall be inhibited and the warning lamp shall be turned on.
When voltage is returned to operating range, the warning lamp is switched off and ECU returns to normal operating
mode.
Pump Motor Checking
The ECU performs a pump motor test at a speed of 15km/h once after IGN is switched on.
Diagnostic Interface
Failures detected by the ECU are encoded on the ECU, stored in a EEPROM and read out by diagnostic equipment
when the ignition switch is turned on.
The diagnosis interface can also be used for testing the ECU during production of the ECU and for actuating the HCU
(Air - bleeding line or Roll and Brake Test line).
Warning Lamp module

1.ABS WARNING LAMP MODULE
The active ABS warning lamp module indicates the selftest and failure status of the ABS.The ABS warning lamp
shall be on:
a. During the initialization phase after IGN ON. (continuously 3 seconds).
b. In the event of inhibition of ABS functions by failure.
c. During diagnostic mode.
d. When the ECU Connector is seperated from ECU.
2. PARKING/EBD WARNING LAMP MODULE
The active EBD warning lamp module indicates the selftest and failure status of the EBD.However, in case the
Parking Brake Switch is turned on, the EBD warning lamp is always turned on regardless of EBD functions.The
EBD warning lamp shall be on:
a. During the initialization phase after IGN ON. (continuously 3 seconds).
b. When the Parking Brake Switch is ON or brake fluid level is low.
c. When the EBD function is out of order.
d. During diagnostic mode.
e. When the ECU Connector is seperated from ECU.
ABS CONTROL
1.NORMAL BRAKING without ABS
Inlet valve(EV)Outlet valve(AV)Pump motor
Operation OpenCloseOFF

PROBLEM SYMPTOMS TABLE
SymptomSuspect Area
ABS does not operate. Only when 1. - 4. are all normal and the problem is still
occurring, replace the HECU.
a. Check the DTC reconfirming that the normal code is
output.
b. Power source circuit.
c. Speed sensor circuit.
d. Check the hydraulic circuit for leakage.
ABS does not operate intermittently. Only when 1. - 4. are all normal and the problem is still
occurring, replace the ABS actuator assembly.
a. Check the DTC reconfirming that the system is
operating to specifications.
b. Wheel speed sensor circuit.

c.Stop lamp switch circuit.
d. Check the hydraulic circuit for leakage.
Communication with Scan tool is not possible.
(Communication with any system is not possible) a.
Power source circuit
b. Diagnosis line
Communication with Scan tool is not possible.
(Communication with ABS only is not possible) a.
Power source circuit
b. Diagnosis line
c. HECU
When ignition key is turned ON (engine OFF), the ABS
warning lamp does not light up. a.
ABS warning lamp circuit
b. HECU
Even after the engine is started, the ABS warning lamp
remains ON. a.
ABS warning lamp circuit
b. HECU
During ABS operation, the brake pedal may vibrate or may not be able to be depressed. Such phenomena are
due to intermittent changes in hydraulic pressure inside the brake line to prevent the wheels from locking and is
not an abnormality.
DETECTING CONDITION
Trouble Symptoms Possible Cause
Brake operation varies depending on driving conditions and road
surface conditions, so diagnosis can be difficult.However if a normal
DTC is displayed, check the following probable cause. When the
problem is still occurring, replace the ABS control module. a.
Inoperative power source circuit
b. Inoperative wheel speed sensor circuit
c. Inoperative hydraulic circuit for leakage
d. Inoperative HECU
INSPECTION PROCEDURES
DTC INSPECTION
1. Connect the Scan Tool with the data link connector and turn the ignition switch ON.
2. Verify that the system is operating to specifications.
Is the system operating to specifications ?
▶ Check the power source circuit.
▶ Erase the DTC and recheck using Scan Tool.
CHECK THE POWER SOURCE CIRCUIT.
1. Disconnect the connector from the ABS control module.
2. Turn the ignition switch ON, measure the voltage between terminal 18 of the ABS control module harness side
connector and body ground.
Specification: approximately B+
Is the voltage within specification?
▶ Check the ground circuit.
▶ Check the harness or connector between the fuse (10A) in the engine compartment junction block and the ABS
control module. Repair if necessary.

DTC is displayed, check the following probable cause. When the
problem is still occurring, replace the ABS control module.b.
Inoperative wheel speed sensor circuit
c. Inoperative hydraulic circuit for leakage
d. Inoperative HECU
INSPECTION PROCEDURES
DTC INSPECTION
1. Connect the Scan Tool with the data link connector and turn the ignition switch ON.
2. Verify that the system is operating to specifications.
Is the system operating to specifications ?
▶ Check the wheel speed sensor circuit.
▶ Erase the DTC and recheck using Scan Tool.
CHECK THE WHEEL SPEED SENSOR CIRCUIT.
Refer to the DTC troubleshooting procedures.
Is the system operating to specifications ?
▶ Check the stop lamp switch circuit.
▶ Repair or replace the wheel speed sensor.
CHECK THE STOP LAMP SWITCH CIRCUIT.
1. Check that stop lamp lights up when brake pedal is depressed and turns off when brake pedal is released.
2. Measure the voltage between terminal 20 of the ABS control module harness side connector and body ground
when brake pedal is depressed.
Specification: approximately B+
Is the voltage within specification?
▶ Check the hydraulic circuit for leakage.
▶ Repair the stop lamp switch. Repair an open in the wire between the ABS control module and the stop lamp
switch.
CHECK THE HYDRAULIC CIRCUIT FOR LEAKAGE.
Refer to the hydraulic lines.
Inspect leakage of the hydraulic lines.
Is the system operating to specifications ?
▶ The problem is still occurring, replace the ABS control module.

▶ Replace the leaking hydraulic lines.
DETECTING CONDITION
Trouble Symptoms Possible Cause
Possible malfunction in the power supply system (including ground)
for the diagnosis line. a.
An open in the wire
b. Poor ground
c. Inoperative power source circuit
INSPECTION PROCEDURES
CHECK THE POWER SUPPLY CIRCUIT FOR THE DIAGNOSIS
Measure the voltage between terminal 9 of the data link connector and body ground.
Specification: approximately B+
Is voltage within specification?
▶ Check the ground circuit for the diagnosis.
▶ Repair an open in the wire. Check and replace fuse (15A) from the engine compartment junction block.
CHECK THE GROUND CIRCUIT FOR THE DIAGNOSIS
Check for continuity between terminal 5 of the data link connector and body ground.
Is there continuity?
▶ Repair an open in the wire between terminal 5 of the data link connector and ground point.
DETECTING CONDITION
Trouble Symptoms Possible Cause
When communication with Scan Tool is not possible, the cause may
be probably an open in the HECU power circuit or an open in the a.
An open in the wire

be probably an open in the HECU power circuit or an open in the
diagnosis output circuit.b.
Inoperative HECU
c. Inoperative power source circuit
INSPECTION PROCEDURES
CHECK FOR CONTINUITY IN THE DIAGNOSIS LINE
1. Disconnect the connector from the ABS control module.
2. Check for continuity between terminals 11 of the ABS control module connector and 1 of the data link connector.
Is there continuity?
▶ Check the power source of ABS control module.
▶ Repair an open in the wire.
CHECK THE POWER SOURCE OF ABS CONTROL MODULE
1. Disconnect the connector from the ABS control module.
2. Turn the ignition switch ON, measure the voltage between terminal 18 of the ABS control module harness side
connector and body ground.
Specification: approximately B+
Is voltage within specification?
▶ Check for poor ground.
▶ Check the harness or connector between the fuse (10A) in the engine compartment junction block and the ABS
control module.Repair if necessary.
CHECK FOR POOR GROUND
Check for continuity between terminal 5 of the data link connector and ground point.
▶ Replace the ABS control module and recheck.
▶ Repair an open in the wire or poor ground.