2006 TOYOTA RAV4 current

AX–36U151E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM
AX
HINT:
Connect the cable of the intelligent tester to the DLC3, turn
the ignition switch ON and attempt to use the tester. If the
screen displays UNABLE TO CONNECT TO VEHICLE, a
problem exists in the vehicle side or the tester side.
If communication is normal when the tester is connected to
another vehicle, inspect the DLC3 on the original vehicle.
If communication is still not possible when the tester is
connected to another vehicle, the problem is probably in the
tester itself. Consult the Service Department listed in the
tester's instruction manual.
6. CHECK MIL
(a) Check that the MIL illuminates when turning the
ignition switch ON.
If the MIL does not illuminate, there is a problem in
the MIL circuit (see page ES-430).
(b) When the engine is started, the MIL should turn off.
7. ALL READINESS
(a) For this vehicle, using the intelligent tester allows
readiness codes corresponding to all DTCs to be
read. When the diagnosis (normal or
malfunctioning) has been completed, readiness
codes are set. Enter the following menus:
ENHANCED OBD II / MONITOR STATUS.
DTC CHECK / CLEAR
1. CHECK DTC
(a) DTCs which are stored in the ECM can be displayed
with the intelligent tester.
The intelligent tester can display pending DTCs and
current DTCs. Some DTCs are not stored unless a
malfunction is detected in consecutive driving
cycles. When a malfunction is detected in only one
driving cycle, it is stored as a pending DTC.
(1) Connect the intelligent tester to the CAN VIM.
Then connect the CAN VIM to the DLC3.
(2) Turn the ignition switch ON and turn the tester
ON.
(3) Enter the following menus: DIAGNOSIS /
ENHANCED OBD II / DTC INFO / CURRENT
CODES (or PENDING CODE).
(4) Confirm the DTCs and freeze frame data, and
then write them down.
(5) Confirm the details of the DTCs (see page AX-
40).
NOTICE:
When simulating a symptom with the scan
tool to check for DTCs, use normal mode.
For codes on the DIAGNOSTIC TROUBLE
CODE CHART subject to "2 trip detection
logic", perform the following actions.
B127989E02

AX–36U151F AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM
AX
HINT:
Connect the cable of the intelligent tester to the DLC3, turn
the ignition switch ON and attempt to use the tester. If the
screen displays UNABLE TO CONNECT TO VEHICLE, a
problem exists in the vehicle side or the tester side.
If communication is normal when the tester is connected to
another vehicle, inspect the DLC3 on the original vehicle.
If communication is still not possible when the tester is
connected to another vehicle, the problem is probably in the
tester itself. Consult the Service Department listed in the
tester's instruction manual.
6. CHECK MIL
(a) Check that the MIL illuminates when turning the
ignition switch ON.
If the MIL does not illuminate, there is a problem in
the MIL circuit (see page ES-430).
(b) When the engine is started, the MIL should turn off.
7. ALL READINESS
(a) For this vehicle, using the intelligent tester allows
readiness codes corresponding to all DTCs to be
read. When the diagnosis (normal or
malfunctioning) has been completed, readiness
codes are set. Enter the following menus:
ENHANCED OBD II / MONITOR STATUS.
DTC CHECK / CLEAR
1. CHECK DTC
(a) DTCs which are stored in the ECM can be displayed
with the intelligent tester.
The intelligent tester can display pending DTCs and
current DTCs. Some DTCs are not stored unless a
malfunction is detected in consecutive driving
cycles. When a malfunction is detected in only one
driving cycle, it is stored as a pending DTC.
(1) Connect the intelligent tester to the CAN VIM.
Then connect the CAN VIM to the DLC3.
(2) Turn the ignition switch ON and turn the tester
ON.
(3) Enter the following menus: DIAGNOSIS /
ENHANCED OBD II / DTC INFO / CURRENT
CODES (or PENDING CODE).
(4) Confirm the DTCs and freeze frame data, and
then write them down.
(5) Confirm the details of the DTCs (see page AX-
40).
NOTICE:
When simulating a symptom with the scan
tool to check for DTCs, use normal mode.
For codes on the DIAGNOSTIC TROUBLE
CODE CHART subject to "2 trip detection
logic", perform the following actions.
B127989E02

U241E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEMAX–35
AX
If communication is normal when the tester is connected to
another vehicle, inspect the DLC3 on the original vehicle.
If communication is still not possible when the tester is
connected to another vehicle, the problem is probably in the
tester itself. Consult the Service Department listed in the
tester's instruction manual.
6. CHECK MIL
(a) Check that the MIL illuminates when turning the
ignition switch ON.
If the MIL does not illuminate, there is a problem in
the MIL circuit (see page ES-386).
(b) When the engine is started, the MIL should turn off.
7. ALL READINESS
(a) For this vehicle, using the intelligent tester allows
readiness codes corresponding to all DTCs to be
read. When the diagnosis (normal or
malfunctioning) has been completed, readiness
codes are set. Enter the following menus:
ENHANCED OBD II / MONITOR STATUS.
DTC CHECK / CLEAR
1. CHECK DTC
(a) DTCs which are stored in the ECM can be displayed
with the intelligent tester.
The intelligent tester can display pending DTCs and
current DTCs. Some DTCs are not stored unless a
malfunction is detected in consecutive driving
cycles. When a malfunction is detected in only one
driving cycle, it is stored as a pending DTC.
(1) Connect the intelligent tester to the CAN VIM.
Then connect the CAN VIM to the DLC3.
(2) Turn the ignition switch ON and turn the tester
ON.
(3) Enter the following menus: DIAGNOSIS /
ENHANCED OBD II / DTC INFO / CURRENT
CODES (or PENDING CODE).
(4) Confirm the DTCs and freeze frame data and
then write them down.
(5) Confirm the details of the DTCs (see page AX-
35).
NOTICE:
When simulating a symptom with the scan
tool to check for DTCs, use normal mode.
For codes on the DIAGNOSTIC TROUBLE
CODE CHART subject to "2 trip detection
logic", perform the following actions.
Turn the ignition switch OFF after the
symptom is simulated once. Then repeat the
simulation process again. When the
symptom has been simulated twice, the MIL
illuminates and the DTCs are recorded in the
ECM.
B127989E02

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

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–21
TF
DATA LIST / ACTIVE TEST
1. READ DATA LIST
HINT:
Using the intelligent tester's (with CAN VIM) DATA LIST
allows switch, sensor and other item values to be read
without removing any parts. Reading the DATA LIST
early in troubleshooting is one way to save time.
(a) Connect the intelligent tester (with CAN VIM) to the
DLC3.
(b) Turn the ignition switch ON.
(c) Read the DATA LIST according to the display on the
tester.
4WD control ECU
Item Measurement Item/Range
(Display)Normal Condition Diagnostic Note
4WD WARN LAMP 4WD indicator light /OFF or ON OFF: 4WD indicator light OFF
ON: 4WD indicator light ON-
SLIP INDI LAMP Slip indicator light /OFF or ON OFF: SLIP indicator light OFF
ON: SLIP indicator light ON-
STOP LAMP SW Stop light switch /OFF or ON OFF: Brake pedal released
ON: Brake pedal depressed-
STEERING ANGLE Steering angle value /
Min.: -3276.8 deg
Max.: 3276.7 degMin.: -3276.8 deg
Max.: 3276.7 deg-
FR WHEEL SPD FR wheel speed /
Min.: 0 km/h (0 mph)
Reading : Max.: 326.4 km/h
(202.8 mph)Actual wheel speed Almost no difference from the
speedometer
FL WHEEL SPD FL wheel speed /
Min.: 0 km/h (0 mph)
Reading : Max.: 326.4 km/h
(202.8 mph)Actual wheel speed Almost no difference from the
speedometer
RR WHEEL SPD RR wheel speed /
Min.: 0 km/h (0 mph)
Reading : Max.: 326.4 km/h
(202.8 mph)Actual wheel speed Almost no difference from the
speedometer
RLWHEEL SPD RL wheel speed /
Min.: 0 km/h (0 mph)
Reading : Max.: 326.4 km/h
(202.8 mph)Actual wheel speed Almost no difference from the
speedometer
AMBI TEMP Ambient temperature /
Min.: -128
C (198.4 F)
Max.: 127 C (260.6 F)Min.: -128 (198.4
F)
Max.: 127 (260.6
F)-
COOLANT TEMP Engine coolant temperature /
Min.: 0
C (32 F)
Max.: 127.5
C (261.5 F)Min.: 0
C (32 F)
Max.: 127.5 C (261.5 F)-
LOCK SW 4WD lock switch / OFF or ON OFF: 4WD lock switch off
ON: 4WD lock switch on-
SLC CUR SLC solenoid (4WD linear
solenoid) current /
Min.: 0 A
Max.: 3 AMin.: 0 A
Max.: 3 A-

GF1A TRANSFER – ACTIVE TORQUE CONTROL 4WD SYSTEMTF–33
TF
DESCRIPTION
The 4WD control ECU receives signals from each sensor to control clutch fluid pressure for limiting the
center differential operation, which distributes torque according to the driving conditions.
WIRING DIAGRAM
INSPECTION PROCEDURE
(a) Remove the coupling connector.
(b) Measure the resistance of the solenoid.
Standard resistance
NG
OK
DTC C1298/98 Linear Solenoid Circuit
DTC No. DTC Detection Condition Trouble Area
C1298/98 1. When the following continues for 1
second or more:
- With the current of the 0.8 A or more, an
open or short in the linear solenoid circuit
occurs.• Wire harness
• Electromagnetic coupling
• 4WD control ECU
1INSPECT ELECTROMAGNETIC COUPLING (4WD LINEAR SOLENOID)
C128602E01
C131916E01
Tester Connection Specified Condition
1 (BSF) - 2 (SLC) 2.2 to 2.6
1 (BSF) - Body ground 10 k or higher
2 (SLC) - Body ground 10 k
or higher
REPLACE ELECTROMAGNETIC COUPLING