wheel torque TOYOTA RAV4 2006 Service Owner's Manual

AX–176U151E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE ASSEMBLY
AX
6. INSTALL AUTOMATIC TRANSAXLE ASSEMBLY
(a) Install the automatic transaxle to the engine with the
7 upper side mounting bolts.
Torque: 64 N*m (653 kgf*cm, 47 ft.*lbf)
(b) Install the 3 lower side mounting bolts.
Torque: 37 N*m (377 kgf*cm, 27 ft.*lbf) for bolt A
46 N*m (469 kgf*cm, 34 ft.*lbf) for bolt B
(c) Install the 6 torque converter clutch mounting bolts.
Torque: 41 N*m (418 kgf*cm, 30 ft.*lbf)
HINT:
First install the green colored bolt and then the other
5 bolts.
(d) Install the flywheel housing under cover with the 2
bolts.
Torque: 7.8 N*m (80 kgf*cm, 69 in.*lbf)
7. INSTALL ENGINE MOUNTING BRACKET LH
(a) Install the mounting bracket with the 4 bolts.
Torque: 64 N*m (653 kgf*cm, 47 ft.*lbf)
C134974
C136364E01
D030472E01
D030471E01
C134978

AX–18U151F AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM
AX
MECHANICAL SYSTEM TESTS
1. STALL SPEED TEST
HINT:
This test is to check the overall performance of the
engine and transaxle.
NOTICE:
• Do not perform the stall speed test longer than 10
seconds.
• To ensure safety, perform this test in an open and
level area that provides good traction.
• The stall speed test should always be performed
with at least 2 people. One person should observe
the condition of the wheels and wheel chocks
while the other is performing the test.
(a) Connect the intelligent tester to the CAN VIM. Then
connect the CAN VIM to the DLC3.
(b) Run the vehicle until the transmission fluid
temperature has reached 50 to 80
C (122 to 176F).
(c) Allow the engine to idle with the air conditioning
OFF.
(d) Chock all 4 wheels.
(e) Set the parking brake and keep the brake pedal
depressed firmly with your left foot.
(f) Move the shift lever to the D position.
(g) Depress the accelerator pedal as much as possible
with your right foot.
(h) Read the engine rpm (stall speed) and release the
accelerator pedal immediately.
Standard value:
2,450 to 2,750 rpm
Evaluation:
NOTICE:
Perform the test at the normal operating ATF
temperature of 50 to 80
C (122 to 176F).
2. SHIFT TIME LAG TEST
HINT:
This test is to check the condition of the direct clutch,
forward clutch, 1st brake and reverse brake.
(a) Connect the intelligent tester to the CAN VIM. Then
connect the CAN VIM to the DLC3.
(b) Run the vehicle until the transmission fluid
temperature has reached 50 to 80
C (122 to 176F).
Test Result Possible Cause
Stall speed is lower than standard value • Engine power output may be insufficient
• Stator one-way clutch not operating properly
HINT:
If the value is less than the specified value by 600 rpm or more, the
torque converter could be faulty.
Stall speed is higher than standard value • Line pressure is too low
• Forward clutch slipping
• U/D (underdrive) brake slipping
• U/D (underdrive) one-way clutch is not operating properly
• No. 1 one-way clutch not operating properly
• Improper fluid level

U151F AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE ASSEMBLYAX–177
AX
6. INSTALL AUTOMATIC TRANSAXLE ASSEMBLY
(a) Install the automatic transaxle to the engine with the
7 upper side mounting bolts.
Torque: 64 N*m (653 kgf*cm, 47 ft.*lbf)
(b) Install the 3 lower side mounting bolts.
Torque: 37 N*m (377 kgf*cm, 27 ft.*lbf) for bolt A
46 N*m (469 kgf*cm, 34 ft.*lbf) for bolt B
(c) Install the 6 torque converter clutch mounting bolts.
Torque: 41 N*m (418 kgf*cm, 30 ft.*lbf)
HINT:
First install the green colored bolt and then the other
5 bolts.
(d) Install the flywheel housing under cover with the 2
bolts.
Torque: 7.8 N*m (80 kgf*cm, 69 in.*lbf)
7. INSTALL TRANSFER ASSEMBLY
(a) Install the transfer (see page TF-75).
8. INSTALL ENGINE MOUNTING BRACKET LH
(a) Install the mounting bracket with the 4 bolts.
Torque: 64 N*m (653 kgf*cm, 47 ft.*lbf)
C134974
C136364E01
D030472E01
D030471E01
C134978

AX–18U241E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM
AX
MECHANICAL SYSTEM TESTS
1. STALL SPEED TEST
HINT:
This test is to check the overall performance of the
engine and transaxle.
NOTICE:
• Do not perform the stall speed test longer than 5
seconds.
• To ensure safety, perform this test in an open and
level area that provides good traction.
• The stall speed test should always be performed
with at least 2 people. One person should observe
the condition of the wheels and wheel chocks
while the other is performing the test.
(a) Connect the intelligent tester to the CAN VIM. Then
connect the CAN VIM to the DLC3.
(b) Run the vehicle until the transmission fluid
temperature has reached 50 to 80
C (122 to 176F).
(c) Allow the engine to idle with the air conditioning
OFF.
(d) Chock all 4 wheels.
(e) Set the parking brake and keep the brake pedal
depressed firmly with your left foot.
(f) Move the shift lever to the D position.
(g) Depress the accelerator pedal as much as possible
with your right foot.
(h) Read the engine rpm (stall speed) and release the
accelerator pedal immediately.
Standard value:
2,150 to 2,450 rpm
Evaluation:
NOTICE:
Perform the test at the normal operating ATF
temperature of 50 to 80
C (122 to 176F).
2. SHIFT TIME LAG TEST
HINT:
This test is to check the condition of the direct clutch,
forward clutch, 1st brake and reverse brake.
(a) Connect the intelligent tester to the CAN VIM. Then
connect the CAN VIM to the DLC3.
(b) Run the vehicle until the transmission fluid
temperature has reached 50 to 80
C (122 to 176F).
(c) Allow the engine to idle with the air conditioning
OFF.
Test Result Possible Cause
Stall speed is lower than standard value • Stator one-way clutch is not operating properly
• Torque converter is faulty (stall speed is less than standard value
by 600 rpm or more)
• Engine power may be insufficient
Stall speed is higher than standard value • Line pressure is low
• C1 clutch slipping
• F3 one-way clutch is not operating properly
• F4 one-way clutch is not operating properly

AX–150U241E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE ASSEMBLY
AX
5. INSTALL AUTOMATIC TRANSAXLE ASSEMBLY
(a) Install the automatic transaxle with the 5 upper side
mounting bolts to the engine.
Torque: 64 N*m (653 kgf*cm, 47 ft.*lbf) for bolt A
46 N*m (469 kgf*cm, 34 ft.*lbf) for bolt B
(b) Install the 4 lower side mounting bolts.
Torque: 37 N*m (377 kgf*cm, 27 ft.*lbf)
(c) Install the 6 torque converter clutch mounting bolts.
Torque: 41 N*m (418 kgf*cm, 30 ft.*lbf)
HINT:
First install the green colored bolt and then the 5
bolts.
(d) Install the flywheel housing under cover.
6. INSTALL ENGINE MOUNTING BRACKET LH
(a) Install the mounting bracket with the 3 bolts.
Torque: 64 N*m (653 kgf*cm, 47 ft.*lbf)
7. INSTALL ENGINE MOUNTING BRACKET FR
(a) Install the mounting bracket with the 4 bolts.
Torque: 64 N*m (657 kgf*cm, 47 ft.*lbf) for 14
mm head bolt
12 N*m (122 kgf*cm, 9 ft.*lbf) for 12 mm
head bolt
C127822E01
C127820
C129381
C129380
C130912

TF–6GF1A TRANSFER – ACTIVE TORQUE CONTROL 4WD SYSTEM
TF
SYSTEM DESCRIPTION
1. GENERAL DESCRIPTION
(a) The active torque control 4WD system detects the
driving conditions based on signals from each ECU,
each switch, the steering angle sensor, the wheel
speed sensor, and the yaw rate sensor. The system
controls the electronic current passing through the
linear solenoid of the electromagnetic coupling, and
performs electronic control to distribute the optimum
torque to the rear wheels.
(b) Main components and their functions.
C128585E01
Component Function
4WD Indicator Light Displays warning to driver when system malfunctions
Stop Light Switch Detects brake operation
Throttle Position Sensor Detects opening angle of throttle
Park/Neutral Position Switch Detects "P" position
Steering Angle Sensor Detects turning of steering wheel
4WD Linear Solenoid Detects electronic control limiting clutch operation using signals from
4WD control ECU
Skid Control ECU with Actuator Detects signals from each sensor and outputs them to 4WD control
ECU
4WD Control ECU Detects signals from each sensor via skid control ECU to operate
linear solenoid and control system
Crankshaft Position Sensor Detects engine rpm and inputs it into ECM
Yaw Rate Sensor Detects forward and rearward acceleration of vehicle, and inputs it into
skid control ECU

GF1A TRANSFER – ACTIVE TORQUE CONTROL 4WD SYSTEMTF–7
TF2. DRIVING FUNCTION
Ambient Temperature Detects external ambient temperature and inputs it into body ECU
Electromagnetic Coupling Based on amount of current sent from 4WD control ECU, torque is
distributed to rear wheels
4WD Lock Switch Change of side auto mode for lock mode
4WD Lock Mode Indicator Light Lock mode control status is communicated to driver through indicator
light illumination
When lock mode is turned ON, indicator light blinks twice and then
remains illuminated.
When lock mode is turned OFF, indicator light turns OFF. Component Function
Vehicle Condition Status
Control at Vehicle Startup This controls the amount of sideway sliding that occurs at rear of
vehicles when accelerating from stop to improve acceleration and hill
climbing capacity
Slip Control at Vehicle Startup This helps prevent vehicle from sliding sideways. When accelerating a
stopped vehicle with the steering wheel turned, it ensures steering
stability
Slip Control This ensures high turning performance and that stability is not affected
by road surface conditions during mid and high speed running
Control During Acceleration This controls straight-line running when accelerating during mid and
high speeds to ensure straight-line stability of the vehicle

TF–8GF1A TRANSFER – ACTIVE TORQUE CONTROL 4WD SYSTEM
TF
3. REFERENCE MECHANISM
(a) Electromagnetic coupling
(1) The outer part of the main clutch is attached
together with the front housing. The inner part of
the main clutch is attached together with the
shaft. The control clutch is attached together
with the control cam. The activation energy from
the transfer is transferred from the propeller
shaft to the front housing. However, when the
linear solenoid is not operating, the main clutch
and control clutch are in a free state, and the
activation energy from the transfer is not
transferred to the rear wheels.
C128591E03

GF1A TRANSFER – ACTIVE TORQUE CONTROL 4WD SYSTEMTF–9
TF
(2) If current is applied to the linear solenoid, the
solenoid magnetizes, and the electromagnet pull
force causes the armature to attach to the
control clutch side. Or, if there is a difference
between the rotation speed of the front and rear
wheels and the control clutch attaches, a
difference occurs in the rotation of the main cam
attached to the shaft and the control cam
attached to the front housing. As a result, each
ball pushes its cam, and the main clutch
attaches. The activation energy from the front
housing passes through main clutch to the shaft,
and then to the rear differential. Then the
activation energy is transferred to the rear
wheels.
(3) Depending on the rotation difference between
the front and rear wheels, the system controls
the current flowing to the linear solenoid. Then
the activation energy applied to the rear wheels
is smoothly controlled. Depending on the
amount of current, the restraint energy of the
outer and inner side of the main clutch changes,
and the activation energy from the propeller
shaft is smoothly controlled from a limited
condition to condition that is nearly a direct-link
4WD condition.
C128592E03

GF1A TRANSFER – ACTIVE TORQUE CONTROL 4WD SYSTEMTF–13
TF
TEST MODE PROCEDURE
1. DESCRIPTION
HINT:
When using a chassis dynamometer, brake tester, etc. to
perform a vehicle test, activate test mode to avoid a
"different tire diameter installed" incorrect judgment.
Test mode does not have a 4WD parameter. Test mode
is activated because it will prohibit a different tire
diameter judgment.
2. ACTIVATE TEST MODE
HINT:
Activate test mode before using a chassis dynamometer,
brake tester, etc. to perform a vehicle test.
(a) Check that the ignition switch is OFF.
(b) Use either of the following methods to change the
4WD ECU to test mode.
(1) Test mode activation through intelligent tester
(with CAM VIM).
• Connect the intelligent tester (with CAM VIM)
to the DLC3 connector and turn the ignition
switch ON. Using the test mode activation
function (mode 10), activate test mode.
(2) Test mode activation by shorting TS terminal
• With the ignition switch OFF, short-circuit the
TS and CG terminals of the DLC3 connector.
Then turn the ignition switch ON to activate
test mode.
NOTICE:
When the ignition switch is turned from
OFF to ON, the 4WD indicator light will
illuminate for 4 seconds. Then it will turn
off.
4WD Lock Mode indicator
HINT:
When the ignition switch is ON and the 4WD
lock switch is turned from OFF to ON, the
4WD lock mode indicator blinks twice and
then illuminates.
If the indicator does not illuminate, check the
bulb for burnout. Also, inspect the wire
harness between the 4WD ECU and
combination meter.
Control Status 4WD Control Status
During test mode Different tire diameter malfunction judgment (detection that tire
diameter of 4 wheels are not same) is not performed.
Other than above item, normal control is performed.
- 4WD lock switch OFF (4WD auto mode status)
- 4WD lock switch ON (4WD lock mode status)
4WD Lock Switch OFF Illuminates for 4 seconds, then turns
OFF
4WD Lock Switch ON Remains illuminated