
CHECKING POWER STEERING BELT TENSION
Refer to EM group(Timing system).
CHECKING POWER STEERING FLUID LEVEL
1.Position the vehicle on a level surface.
2. Start the engine. With the vehicle kept stationary, turn the steering wheel several times continuously to raise the
fluid temperature to 50- 60°C (122 - 140°F).
3. With the engine at idle, turn the steering wheel fully clockwise and counter- clockwise several times.
4. Make sure that there is no foaming or cloudiness in the reservoir fluid.
5. Stop the engine and check for any difference in fluid level between a stationary and a running engine.
a.If the fluid level varies 5 mm (0.2 in) or more, bleed the system again.
b. If the fluid level suddenly rises after stopping the engine, further bleeding is required.
c. Incomplete bleeding will produce a chattering sound in the pump and noise in the flow control valve, and
lead to decreased durability of the pump.
REPLACING POWER STEERING FLUID
1.Jack up the front wheels and support them with jackstands.
2. Disconnect the return hose from the oil reservoir and plug the oil reservoir.
3. Connect a vinyl hose to the disconnected return hose, and drain the oil into a container.
4. Remove the fuel pump fuse, then start the engine and wait for the engine to stall. Next, while operating the starting
motor intermittently, turn the steering wheel all the way to the left and then to the right several times to drain the
fluid.
5. Connect the return hoses, then fill the oil reservoir with the specified fluid.
6. Reinstall the fuel pump fuse.
7. Start the engine. Check for oil leakage.
8. Stop the engine.
9. Bleed the system.
Power steering fluid type : PSF - 3
Total quantity : Approx 1.1 liter
AIR BLEEDING
1.Remove the fuel pump fuse, then start the engine and wait for the engine to stall. Next, while operating the starting
motor intermittently (for 15 ~ 20 seconds), turn the steering wheel all the way to the left and then to the right five or
six times.

a.During air bleeding, replenish the fluid supply so that the level never falls below the lower position of the
filter.
b. If air bleeding is done while the vehicle is idling, the air will be broken up and absorbed into the fluid. Be
sure to do the bleeding only while cranking.
c. Reinstall the fuel pump fuse, and start the engine(idling).
d. Turn the steering wheel to the left and the right until there are no air bubbles in the oil reservoir.
Do not hold the steering wheel turned all the way to either side for more than ten seconds.
e. Confirm that the fluid is not milky, and that the level is up to the position specified on the level gauge.
f. Confirm that there is little change in the surface o the fluid when the steering wheel is turned left and right.
a. If the surface of the fluid changes considerably, air bleeding should be done again.
b. If the fluid level rises suddenly when the engine is stopped, it indicates that there is still air in the
system.
c. If there is air in the system, a jingling noise may be heard from the pump and the control valve
may also produce unusual noises. Air in the system will shorten the life of the pump and other
parts.
OIL PUMP PRESSURE TEST (OIL PUMP RELIEF PRESSURE)
1.Disconnect the pressure hose from the oil pump. Connect the special tool between the oil pump and pressure hose
as illustrated.
2. Bleed the air, and then start the engine and turn the steering wheel several times so that the fluid temperature
rises to approximately 50°C (122°F).
3. Set the engine speed to 1,000 rpm.
4. Close the shut- off valve of the special tool and measure the fluid pressure to confirm that it is within the range.
standard vaule :
Relief pressure: 90 +3/- 2 kgf/cm²
Don’t keep the shut- off valve on the pressure gauge closed for longer than seconds.

2007 > 2.7L V6 GASOLINE >
REMOVAL
1.If the compressor is marginally operable, run the engine at idle speed, and let the air conditioning work for a few
minutes, then shut the engine off.
2. Disconnect the negative cable from the battery.
3. Recover the refrigerant with a recovery/charging station (Refer to HA - 8).
4. Loosen the drive belt (Refer to HA - 14).
5. Remove the bolts, then disconnect the suction line (A) and discharge line (B) from the compressor. Plug (C) or cap
the lines immediately after disconnecting them to avoid moisture and dust contamination.
6.Disconnect the compressor clutch connector (A), and then remove 4 mounting bolts and the compressor.
INSTALLATION
1.Make sure of the length of compressor mounting bolts.
2.Install in the reverse order of removal, and note these items.
a. If you're installing a new compressor, drain all the refrigerant oil from the removed compressor, and measure its
volume, Subtract the volume of drained oil from 120cc(4.20 oz.) the result is the amount of oil you should drain

2007 > 2.7L V6 GASOLINE >
INSPECTION
Oil Specification
1. The HFC- 134a system requires synthetic (PAG) compressor oil whereas the R- 12 system requires mineral
compressor oil. The two oils must never be mixed.
2. Compressor (PAG) oil varies according to compressor model. Be sure to use oil specified for the model of
compressor.
Handling of Oil
1.The oil should be free from moisture, dust, metal powder, etc.
2. Do not mix with other oil.
3. The water content in the oil increases when exposed to the air. After use, seal oil from air immediately. (HFC - 134a
Compressor Oil absorbs moisture very easily.)
4. The compressor oil must be stored in steel containers, not in plastic containers.
Compressor oil check
The oil used to lubricate the compressor is circulating with the refrigerant.
Whenever replacing any component of the system or a large amount of gas leakage occurs, add oil to maintain the
original amount of oil.
Oil total volume in system:
120±10cc (4.05±0.34 fl.oz)
Oil Return Operation
There is close affinity between the oil and the refrigerant.
During normal operation, part of the oil recirculates with the refrigerant in the system. When checking the amount of
oil in the system, or replacing any component of the system, the compressor must be run in advance for oil return
operation. The procedure is as follows:
1. Open all the doors and the engine hood.
2. Start the engine and air conditioning switch to "ON" and set the blower motor control knob at its highest position.
3. Run the compressor for more than 20 minutes between 800 and 1,000 rpm in order to operate the system.
4. Stop the engine.
Replacement of Component Parts
When replacing the system component parts, supply the following amount of oil to the component parts to be installed.
Component parts to be installed Amount of Oil
Evaporator 50 cc (1.70 fl.oz)
Condenser 30 cc (1.02 fl.oz)
Receiver/dryer 30 cc (1.02 fl.oz)
Refrigerant line (One piece) 10 cc (0.34 fl.oz)
For compressor replacement, subtract the volume of oil drained from the removed compressor from the specified
volume, and drain the calculated volume of oil from the new compressor:
The specified volume - volume of removed compressor = volume to drain from the new compressor.
Even if no oil is drained from the removed compressor, don’t drain more than 50cc from new compressor.

14.Remove the evaporator core(A).
15.Be careful that the inlet and outlet pipe are not bent during heater core removal, and pull out the heater core.
16. Install the heater core in the reverse order of removal.
17. Installation is the reverse order of removal, and note these items :
a. If you're installing a new evaporator, add refrigerant oil (ND - OIL8).
b. Replace the O - rings with new ones at each fitting, and apply a thin coat of refrigerant oil before installing
them. Be sure to use the right O - rings for R- 134a to avoid leakage.
c. Immediately after using the oil, replace the cap on the container, and seal it to avoid moisture absorption.
d. Do not spill the refrigerant oil on the vehicle ; it may damage the paint ; if the refrigerant oil contacts the paint,
wash it off immediately
e. Apply sealant to the grommets.
f. Make sure that there is no air leakage.
g. Charge the system and test its performance.
h. Do not interchange the inlet and outlet heater hoses and install the hose clamps securely.
i. Refill the cooling system with engine coolant.

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

Gearbox Status
The status of the gearbox is sent on the CAN network when the CAN network is available.
Oil Pressure Switch Status
The status of the oil pressure switch is sent on the CAN network when the CAN network is available.
Fuel Filter Status
The FAM receives on digital input the status of the fuel filter (Fuel Filter Input) and sends it (Fuel filter switch) on the
CAN network.
Washer Fluid Sensor Status
The FAM receives on digital input the status of the washer fluid sensor and sends it on the CAN network.
If Washer Fluid Low Input is LOW for more than 10 sec, FAM sends the warning message.
Seat Belt Warning Status
The IPM receives on digital input the status of the seat belt switch and sends the seat belt warning on the CAN
network.
If the Ignition switch status is in RUN or START when the Seat Belt Sw Input is FASTENED, the seat belt warning
indicator is blinking for 6 seconds.
When Seat Belt switch Input is NOT FASTENED, the seat belt warning indicator is blinking for 6 seconds.
If the Seat Belt switch Input is FASTENED during the 6 seconds, the seat belt warning indicator is blinking till the end
of the 6 seconds.
In North America:
the seat belt warning indicator is blinking when Ignition switch is on the status RUN or START and Seat Belt Sw Input
is NOT FASTENED.
Parking Brake Indicator
The indicator manages 3 functions: brake fluid sensor, parking brake warning and vacuum switch.
The vacuum function is available for diesel engine only
The FAM receives on digital input the status of the vacuum switch and the ABS EBD warning and sends them on the
CAN network.
The status of the vacuum switch and the ABS EBD warning are sent on the CAN network when the CAN network is
available.
The FAM receives on digital input the status of the brake fluid sensor and sends it on the CAN network.
The status of the brake fluid sensor is sent on the CAN network when the CAN network is available.
The IPM receives on digital input the status of the parking brake switch and by CAN network the status of the vacuum
switch, the status of the ABS EBD warning, the status of the brake fluid sensor and the speed of the vehicle.

Tolerance(rpm) 5,000
6,0007,0008,000Engine
Revolution (rpm) ±150
±180±210 -Gasoline
±150 ±150 --Diesel
FUEL GAUGE SENDER
1.Using an ohmmeter, measure the resistance between terminals 1 and 2 of sender connector (A) at each float level.
2.Also check that the resistance changes smoothly when the float is moved from "E" to "F".
Position Resistance(Ω)
Sender (E) 200
Warning lamp 160
1/2 54.5
Sender (F) 8
If the height resistance is not within specifications, replace the fuel sender as an assembly.
After completing this test, wipe the sender dry and reinstall it in the fuel tank.
ENGINE COOLANT TEMPERATURE SENDER
1.Using an ohmmeter, measure the resistance between the terminal 2 and ground.
Temperature[°F(°C)] 140
(60) 185
(85) 230
(110) 257
(127.4) E/G
Resistance (Ω) 12856.1 25.216.1Gasoline
Temperature [°F(°C)] 120
(49) 160
(71) 230
(110) 260
(127.4) E/G
Resistance (Ω) 209.688.724.315.9Diesel
OIL PRESSURE SWITCH
1.Check that there is continuity between the oil press switch terminal and ground with the engine off.
2. Check that there is no continuity between the terminal and ground with the engine running.
3. If operation is not as specified, replace the switch.