ECU KIA CARNIVAL 2007 Repair Manual

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.

DETECTING CONDITIONTrouble Symptoms Possible Cause
When current flows in the HECU the ABS warning lamp turns from
ON to OFF as the initial check.Therefore if the lamp does not light up,
the cause may be an open in the lamp power supply circuit, a blown
bulb, an open in the both circuits between the ABS warning lamp and
the HECU, and the inoperative HECU. a.
Inoperative ABS warning lamp bulb
b. Blown No.2 fuse (10A) in the engine
compartment junction block
c. Inoperative ABS warning lamp module
d. Inoperative HECU
INSPECTION PROCEDURES
PROBLEM VERIFICATION
Disconnect the connector from the ABS control module and turn the ignition switch ON.
Does the ABS warning lamp light up?
▶ It is normal. Recheck the ABS control module.
▶ Check the power source for the ABS warning lamp.
CHECK THE POWER SOURCE FOR THE ABS WARNING LAMP
1. Disconnect the instrument cluster connector and turn the ignition switch ON.
2. Measure the voltage between terminal 8 of the cluster harness side connector and body ground.
Specification: approximately B+
Is voltage within specification?
▶ Repair bulb or instrument cluster assembly.
▶ Check for blown fuse.

CHECK FOR BLOWN FUSE
Check continuity of fuse (10A) from the engine compartment junction block.
Is there continuity?
▶ Repair an open in the wire between ABS fuse and 1 of cluster connector.
▶ Replace the blown fuse.
DETECTING CONDITION
Trouble Symptoms Possible Cause
If the HECU detects trouble, it lights the ABS warning lamp while at
the same time prohibiting ABS control. At this time, the HECU
records a DTC in memory.Even though the normal code is output, the
ABS warning lamp remains ON, then the cause may be probably an
open or short in the ABS warning lamp circuit. a.
An open in the wire
b. Inoperative instrument cluster assembly
c. Inoperative ABS warning lamp module
d. Inoperative HECU
INSPECTION PROCEDURES
CHECK DTC OUTPUT.
1. Connect the Scan Tool to the 16P data link connector located behind the driver's side kick panel.
2. Check the DTC output using Scan Tool.
Is DTC output ?
▶ Repair circuit indicated by code output.
▶ Check instrument cluster.
CHECK INSTRUMENT CLUSTER
Disconnect the cluster connector and turn the ignition switch ON.
Does the ABS warning lamp remains ON?
▶ Replace the instrument cluster.
▶ Check for open the wire.
CHECK FOR OPEN IN THE WIRE
Check for continuity in the wire between cluster and ABS control module.
Is there continuity?
▶ Replace the ABS control module and recheck.
▶ Repair an open in the wire between cluster and ABS control module.
BLEEDING OF BRAKE SYSTEM
1. Remove the reservoir cap and fill the brake reservoir with brake fluid.
If there is any brake fluid on any painted surface, wash it off immediately.

DTCDESCRIPTION WARNING LAMP
REMARK
ABS EBDESC
C1101 BATTERY VOLTAGE HIGH ООО
C1102 BATTERY VOLTAGE LOW ОО
C1200 FL WHEEL SPEED SENSOR- OPEN/SHORT ОО
C1201 FL WHEEL SENSOR- RANGE/ PERFORMANCE ОО
C1202 FL WHEEL WHEEL SPEED SENSOR- NO SIGNAL ОО
C1203 FR WHEEL SPEED SENSOR- OPEN/SHORT ОО
C1204 FR WHEEL SENSOR- RANGE/ PERFORMANCE ОО
C1205 FR WHEEL SPEED SENSOR- NO SIGNAL ОО
C1206 RL WHEEL SPEED SENSOR- OPEN/SHORT ОО
C1207 RL WHEEL SENSOR- RANGE/ PERFORMANCE ОО
C1208 RL WHEEL SPEED SENSOR- NO SIGNAL ОО
C1209 RR WHEEL SPEED SENSOR- OPEN/SHORT ОО
C1210 RR WHEEL SENSOR- RANGE/ PERFORMANCE ОО
C1211 RR WHEEL SPEED SENSOR- NO SIGNAL ОО
C1213 WHEEL SPEED FREQUENCY ERROR ОО
C1235 PRESSURE SENSOR- ELECTRICAL ОESP
C1237 PRESSURE SENSOR- SIGNAL FAULT ОESP
C1260 STEERING ANGLE SENSOR- SIGNAL ОESP
C1261 STEERING ANGLE SENSOR NOT CALIBRATED ОESP
C1282 YAW RATE & LATERAL G SENSOR- ELECTRICAL ОESP
C1283 YAW RATE & LATERAL G SENSOR- SIGNAL ОESP
C1503 ESP SWITCH ERROR ОESP
C1513 BRAKE LIGHT SWITCH MALFUNCTION О
C1604 ECU HARDWARE ERROR ООО
C1605 CAN CONTROL HARDWARE ERROR ОESP
C1611 CAN TIME OUT- PCM(ECM) ОESP
C1612 CAN TIME OUT- PCM(TCM) ОESP
C1616 CAN BUS OFF ОESP
C1623 CAN TIMEOUT STEERING ANGLE SENSOR ОESP
C1625 CAN TIME OUT- ESP ОESP
C1626 IMPLAUSIBLE CONTROL ООESP
C1702 VARIANT CODING ООО ESP
C2112 VALVE RELAY MALFUNCTION ООО
C2308 FL INLET VALVE MALFUNCTION ООО
C2312 FL OUTLET VALVE MALFUNCTION ООО
C2316 FR INLET VALVE MALFUNCTION ООО
C2320 FR OUTLET VALVE MALFUNCTION ООО
C2324 RL INLET VALVE MALFUNCTION ООО
C2328 RL OUTLET VALVE MALFUNCTION ООО

2007 > 2.7L V6 GASOLINE >
REMOVAL
1.Remove the air cleaner. (Refer to 'Master cylinder Removal')
2. Disconnect the brake tube from the HECU by unlocking the nuts counterclockwise with a spanner.
3.Disconnect the connector(A) from the HECU.
4.Remove the two HECU brake mounting bolts(B) , and then disassemble the HECU with the bracket.
a.Never attempt to disassemble the HECU.
b. The HECU must be protected during storage and transport, and must not be subjected to excessive shock.
5. Remove the two HECU mounting nuts (C) and washer, and then remove the bracket.
INSTALLATION
1.Installation is the reverse of removal.
2. Tighten the HECU mounting bolts and brake tube nuts to the specified torque.