Page 836 of 1575

2.Remove ignition key from the vehicle.
3. Connect the clock spring harness connetor and horn harness connector to the clock spring.
4. Set the clock spring on neutral position and after turning the front wheels to the straight- ahead position, install the
clock spring.
5. Install the steering wheel column cover and the steering wheel. (Refer to ST group)
6. Connect the Driver Airbag (DAB) module connector and horn connector, then install the Driver Airbag (DAB)
module on the steering wheel.
7. Secure the Driver Airbag (DAB) with the new mounting bolts.
Tightening Torque (DAB Mounting Bolt)
: 0.8 ~ 1.1 kgf.m (7.9 ~ 10.8 Nm, 5.8 ~ 8.0 lb.ft)
8.Connect the battery negative cable.
9. After installing the airbag, confirm proper system operation:
a. Turn the ignition switch ON; the SRS indicator light should be turned on for about six seconds and then go off.
b. Make sure horn button works.
INSPECTION
Driver Airbag (DAB)
If any improper parts are found during the following inspection, replace the airbag module with a new one.
Never attempt to measure the circuit resistance of the airbag module (squib) even if you are using the specified
tester. If the circuit resistance is measured with a tester, accidental airbag deployment will result in serious
personal injury.
1. Check pad cover for dents, cracks or deformities.
2. Check the airbag module for denting, cracking or deformation.
3. Check hooks and connectors for damage, terminals for deformities, and harness for binds.
Page 837 of 1575
4.Check airbag inflator case for dents, cracks or deformities.
5.Install the airbag module to the steering wheel to check for fit or alignment with the wheel.
Clockspring
1.If, as a result of the following checks, even one abnormal point is discovered, replace the clock spring with a new
one.
2. Check connectors and protective tube for damage, and terminals for deformities.
Page 865 of 1575

2007 > 2.7L V6 GASOLINE >
SPECIFICATIONS
Item Specification
Master cylinder
· Type
· I.D. mm(in)
· Piston stroke mm(in)
· Fluid level warning sensor Tandem type
26.99/(1.063)
30(1.18)
Provided
Brake booster
· Type
· Boosting ratio 8 + 9 in Tandem
9.0 : 1
Front brake(Disc)
· Type
· Disc O.D.
· Disc thickness
· Pad thickness
· Cylinder type
· Cylinder I.D. Floating type with ventilated disc
298 mm (11.73 in)
28 mm (1.10 in)
10.5 mm (0.41 in)
Double piston
Ø48 mm (Ø1.89 in)
Rear brake(Disc)
· Type
· Disc O.D.
· Disc thickness
· Pad thickness
· Cylinder type
· Cylinder I.D Floating type with solid disc
302 mm (11.89 in)
12 mm (0.47 in)
10 mm (0.39 in)
Single piston
Ø42.9 mm (Ø1.69 in)
Parking brake
· Type
· Actuation
· Drum DIH(Drum in hat)
Foot brake
Ø190 mm (Ø7.48 in)
O.D=Outer Diameter
I.D=Inner Diameter
ABS : Anti- lock Brake System
ESP : Electronic Stability Program
SERVICE STANDARD
Items Standard value
Brake pedal height 192.4 mm(7.57 in)
Brake pedal full stroke 122 mm (4.8 in)
Adjust Brake pedal full stroke 60 mm (2.36 in)
Brake pedal free play 3 ~ 8 mm(0.11 ~ 0.31 in)
Stop lamp switch outer case to pedal stopper clearance 1.0 ~ 1.5 mm (0.04 ~ 0.06 in)
Booster push rod to master cylinder piston clearance 0.6 ~ 1.7(0.02 ~ 0.07 in)(at 500 mmHg)
Parking brake pedal stroke when pedal assembly is depressed with
294N (30kgf, 66lb force) 145 mm (5.71 in) above
Front disc brake pad thickness 10.5 mm (0.41 in)
Front disc thickness 28 mm (1.10 in)
Rear disc brake pad thickness 10 mm (0.39 in)
Rear disc brake disc thickness 12 mm (0.47 in)
Rear parking brake liner thickness 4 mm (0.16 in)
Page 871 of 1575
[RHD]
BRAKE PEDAL BRAKE SWITCH ADJUSTMENT
PEDAL HEIGHT1. Disconnect the brake switch connector, loosen the brake switch locknut (A), and brake off the brake switch (B) until
it is no longer touching the brake pedal.
2. Lift up the carpet. At the insulator cutout, measure the pedal height (C) from the middle of the left- side center of
the pedal pad (D).
Standard pedal height( with carpet removed): 192.4 mm(7.57 in.)
3.Loosen the pushrod locknut (A), and screw the pushrod in or out with pliers until the standard pedal height from the
floor is reached. After adjustment, tighten the locknut firmly. Do not adjust the pedal height with the pushrod
depressed.
Page 918 of 1575
2.Connect the parking brake wire (B) to the brake shoe (A).
3.Install the shoe hold down pin and spring (A) to hold the brake shoe (B).
4.Install the adjuster assembly (B) and the lower return spring (C).
5. Install the upper return spring (A) and strut (B).
6.Grease where is necessary.
7. Install the rear hubs.
8. Install the hub nut (A). After installation, lock the nut to the spindle as shown in the illustration.
Page 923 of 1575
ABS
( Anti-lock Brake System )
Page 928 of 1575

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
Page 937 of 1575

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.