2006 TOYOTA RAV4 steering wheel

CHASSIS - 4WD SYSTEM
01MCH09Y
Electric Control Coupling
4WD ECU
Four-wheel Drive
Lock Switch
4WD LOCK
Indicator Light
4WD Warning
LightECM
Skid Control ECU
Main Body ECU
Ya w R a t e &
Deceleration Sensor
Steering Angle
SensorThrottle Position Sensor
Crankshaft Position Sensor
Park / Neutral Position
Switch
Speed Sensors
Stop Light Switch
Ambient Temperature
Sensor
Parking Brake Switch
CANH,
CANLCH-67
2. System Diagram

CHASSIS - 4WD SYSTEM
01NCH36Y
Skid Control ECU
Electric Control Coupling
ECM Ambient Temperature
Sensor
Main Body ECUSteering Angle
Sensor
Four-wheel Drive
Lock Switch
4WD ECU
Parking Brake
Switch Stop Light Switch
Yaw Rate & Deceleration
Sensor DLC3 CH-68
3. Layout of Main Components

CHASSIS - 4WD SYSTEMCH-69
4. Function of Main Components
ComponentFunction
Combination
4WD LOCK
Indicator LightIlluminates to inform the driver of the 4WD LOCK mode control.Combination
Meter4WD
Warning LightIlluminates to warn the driver of a malfunction in the 4WD system.
Speed Sensor (4)Detects the wheel speed of each 4 wheel.
Steering Angle SensorDetects the direction and angle of the steering wheel.
Yaw Rate & Deceleration SensorDetects the vehicle’s longitudinal and lateral acceleration.
Crankshaft Position SensorDetects the engine speed and outputs it to the ECM.
Accelerator Pedal Position SensorDetects the accelerator pedal position and outputs it to the ECM.
Throttle Position SensorDetects the throttle valve position and outputs it to the ECM.
Park / Neutral Position SwitchDetects the neutral position of the transaxle and outputs it to the
ECM.
Stop Light SwitchDetects the brake pedal depressing signal.
Parking Brake SwitchDetects when the parking brake lever is pulled up.
Four-wheel Drive Lock SwitchSwitches between the AUTO and LOCK modes.
4WD ECU
Controls the amperage that is applied to the electromagnetic
solenoid of the electric control coupling based on the signals
provided by the sensors in order to optimally distribute drive torque
in accordance with driving conditions.
ECMOutputs signals such as the shift position signal, throttle position
signal, and crankshaft position signal to the 4WD ECU.
Skid Control ECUOutputs signals such as the vehicle speed signal and deceleration
signal to the 4WD ECU.
Electric Control CouplingDistributes drive torque in accordance with the amperage applied
by the 4WD ECU.

EM–242GR-FE ENGINE MECHANICAL – ENGINE ASSEMBLY
EM
(b) 4WD:
Disconnect the control cable (see page AX-154).
31. REMOVE FRONT EXHAUST PIPE ASSEMBLY (See
page EX-3)
32. REMOVE CENTER EXHAUST PIPE ASSEMBLY (See
page EX-2)
33. REMOVE PROPELLER WITH CENTER BEARING
SHAFT ASSEMBLY (See page PR-3)
34. REMOVE FRONT WHEELS
35. REMOVE FRONT AXLE HUB NUT LH
(a) Remove the hub nut (see page AH-8).
36. REMOVE FRONT AXLE HUB NUT RH
(a) Remove the hub nut (see page AH-8).
37. DISCONNECT FRONT STABILIZER LINK ASSEMBLY
LH (See page SP-30)
38. DISCONNECT FRONT STABILIZER LINK ASSEMBLY
RH (See page SP-30)
39. DISCONNECT STEERING INTERMEDIATE SHAFT
(See page PS-44)
40. DISCONNECT TIE ROD END SUB-ASSEMBLY RH
(See page PS-42)
41. DISCONNECT TIE ROD END SUB-ASSEMBLY LH
(See page PS-42)
42. REMOVE FRONT DRIVE SHAFT LH
(a) 2WD:
Remove the drive shaft (see page DS-10).
(b) 4WD:
Remove the drive shaft (see page DS-43).
43. REMOVE FRONT DRIVE SHAFT RH
(a) 2WD:
Remove the drive shaft (see page DS-10).
(b) 4WD:
Remove the drive shaft (see page DS-43).
44. REMOVE ENGINE WITH TRANSAXLE
(a) Install the No. 1 and No. 2 engine hangers with the
4 bolts as shown in the illustration.
Torque: 33 N*m (337 kgf*cm, 24 ft.*lbf)
HINT:
• Insert the claw of the hanger into hole of the
cylinder head.
• Fit the fork part of the hanger onto the rib of the
cylinder head.
A129635E02
Part Name Part No.
No. 1 engine hanger 12281-31120
No. 2 engine hanger 12282-31100
Bolt 91671-10825

MA–12MAINTENANCE – CHASSIS
MA
GENERAL MAINTENANCE
(2006/01- )
1. INSPECT STEERING LINKAGE AND GEAR HOUSING
(a) Check the steering wheel free play.
(b) Check the steering linkage for looseness or
damage.
(1) Check that the tie rod ends do not have
excessive play.
(2) Check that the dust seals and boots are not
damaged.
(3) Check that the boot clamps are not loose.
(4) Check that the steering gear housing is not
damaged.
(5) Check that the connectors are properly
connected to the steering gear housing.
2. INSPECT BALL JOINTS AND DUST COVERS
(a) Inspect the ball joints for excessive looseness.
(1) Jack up the front of the vehicle and place
wooden blocks with a height of 180 to 200 mm
(7.09 to 7.87 in.) under the front tires.
(2) Lower the vehicle until the front coil spring has
about half its ordinary load. Place stands under
the vehicle for safety.
(3) Check that the front wheels are pointing
straight ahead. Use wheel chocks on all 4
wheels.
(4) Using a lever, pry up the end of the lower arm.
Check the amount of play.
Maximum ball joint vertical play:
0 mm (0 in.)
If there is any play, replace the ball joint.
(b) Check the dust cover for damage.
3. INSPECT DRIVE SHAFT BOOTS
(a) Check the drive shaft boots for loose clamps,
grease leakage, kinks or damage.
4. INSPECT AUTOMATIC TRANSAXLE FLUID LEVEL
(a) Visually check the transmission for fluid leakage. If
oil is leaking, find the cause and repair it.
5. INSPECT TRANSFER OIL (for 4WD)
(a) Visually check the transfer for oil leakage. If oil is
leaking, find the cause and repair it.
6. INSPECT REAR DIFFERENTIAL OIL (for 4WD)
(a) For the rear differential oil inspection, refer to the
following procedures (see page DF-3).
Type See procedures
U151E See page AX-126
U151F See page AX-126
Type See procedures
Front Oil See page TF-45
Rear Oil See page TF-45

STEERING COLUMN – STEERING SYSTEMSR–3
SR
PROBLEM SYMPTOMS TABLE
(2006/01- )
HINT:
Use the table below to help determine the cause of the
problem symptom. The potential causes of the symptoms are
listed in order of probability in the "Suspected Area" column
of the table. Check each symptom by checking the suspected
areas in the order they are listed. Replace parts as
necessary.
Steering system
ON-VEHICLE INSPECTION
1. CHECK STEERING WHEEL FREE PLAY
(a) Stop the vehicle and align the tires facing straight
ahead.
(b) Turn the steering wheel gently right and left, and
check the steering wheel free play.
Maximum free play:
30 mm (1.18 in.)
If the free play exceeds the maximum, replace the
steering intermediate shaft sub-assembly or
steering gear.
Symptom Suspected Area See page
Hard steering1. Front tires (Improperly inflated or unevenly worn)TW-1
2. Front wheel alignment (Incorrect)SP-3
3. Front suspension (Lower ball joint)SP-27
4. Steering intermediate shaftSR-11
5. Steering columnSR-11
6. Steering gearPS-42
7. Power steering ECUPS-46
Poor return1. Front tires (Improperly inflated or unevenly worn)TW-1
2. Front wheel alignment (Incorrect)SP-3
3. Steering columnSR-11
4. Steering gearPS-42
5. Power steering ECUPS-46
No free play or excessive play1. Steering intermediate shaftSR-11
2. Steering gearPS-42
Knocking (or clunking) sound occurs when steering
wheel turned while power steering in operation1. Steering intermediate shaftSR-11
2. Front suspension (Lower ball joint)SP-27
3. Front axle hub (Hub bearing)AH-7
4. Steering gearPS-42
Friction sound occurs when steering wheel turned
during low speed driving1. Power steering motorSR-11
2. Steering columnSR-11
High-pitched sound (squealing sound) occurs when
steering wheel turned slowly with vehicle stopped1. Power steering motorSR-11
Steering wheel vibrates and noise occurs when
steering wheel turned while vehicle stopped1. Power steering motorSR-11
2. Steering columnSR-11
C128822E01

SR–4STEERING COLUMN – STEERING SYSTEM
SR
REPAIR
1. CORRECT STEERING OFF CENTER
(a) Check whether the steering wheel is off-center.
(1) Apply masking tape to the top center of the
steering wheel and the upper steering column
cover.
(2) Drive the vehicle in a straight line for 100
meters at a constant speed of 56 km/h (35
mph), holding the steering wheel to maintain
the course.
(3) Draw a line on the masking tape, as shown in
the illustration.
(4) Turn the steering wheel to the center position.
HINT:
Look at the upper surface of the steering
wheel, the steering spokes and the SRS airbag
line to determine the center position.
(5) Draw another line on the masking tape on the
steering wheel, as shown in the illustration.
(6) Measure the distance between the 2 lines on
the masking tape on the steering wheel.
(7) Convert the measured distance to the steering
angle.
HINT:
• Measured distance of 1 mm (0.04 in.) =
Approximately 1 degree steering angle.
• Make a note of the steering angle.
(b) Adjust the steering angle.
C128823E01
C128824E01
C128825E01

POWER STEERING – ELECTRONIC POWER STEERING SYSTEMPS–5
PS
SYSTEM DESCRIPTION
1. DESCRIPTION
The EPS (Electronic Power Steering) system generates
torque through the operation of the motor and the
reduction gear installed on the column shaft in order to
assist steering effort.
The power steering ECU determines directions and the
amount of assisting power in accordance with vehicle
speed signals and signals from the torque sensor built
into the steering column assembly. As a result, the power
steering adjusts the steering effort so that it is lighter
during low speed driving and heavier during high speed
driving.
(a) Power steering ECU:
The power steering ECU calculates assisting power
based on steering torque signals from the torque
sensor and vehicle speed signals from the skid
control ECU.
(b) Torque sensor:
The torque sensor detects the steering effort
generated when the steering wheel is turned and
converts it to an electrical signal.
(c) EPS motor:
The EPS motor is activated by the current from the
power steering ECU and generates torque to assist
the steering effort.
(d) Motor rotation angle sensor:
The motor rotation angle sensor consists of the
resolver sensor, which excels in reliability and
durability. The rotation angle sensor detects the
rotation angle of the motor and outputs it to the
power steering ECU. As a result, it ensures efficient
EPS control.