2006 TOYOTA RAV4 warning

TIRE AND WHEEL – TIRE PRESSURE WARNING SYSTEMTW–35
TW
(a) Disconnect the E56 ECU connector.
(b) Disconnect the L20 receiver connector.
(c) Measure the resistance of the wire harness side
connectors.
Standard resistance
NG
OK
(a) Check the DATA LIST tire pressure valve.
Tire pressure warning ECU
3CHECK WIRE HARNESS (ECU - RECEIVER)
F101017E09
Tester Connection Specified Condition
E56-8 (RF5V) - L20-5 (+5V) Below 1
E56-7 (RDA) - L20-1 (RDA)
E56-16 (GND2) - L20-4 (GND)
REPAIR OR REPLACE HARNESS AND
CONNECTOR
4READ VALUE OF INTELLIGENT TESTER (TIRE PRESSURE)
Item Measurement Item / Range
(Display)Normal Condition Diagnostic Note
TIREPRESS1 ID1 tire pressure/ minimum: 0
kPa (0 kgf/cm
2, 0 psi)
maximum: 637.5 kPa (6.5 kgf/
cm
2, 92.5 psi)Actual tire pressure -
TIREPRESS2 ID2 tire pressure/ minimum: 0
kPa (0 kgf/cm
2, 0 psi)
maximum: 637.5 kPa (6.5 kgf/
cm
2, 92.5 psi)Actual tire pressure -
TIREPRESS3 ID3 tire pressure/ minimum: 0
kPa (0 kgf/cm
2, 0 psi)
maximum: 637.5 kPa (6.5 kgf/
cm
2, 92.5 psi)Actual tire pressure -
TIREPRESS4 ID4 tire pressure/ minimum: 0
kPa (0 kgf/cm
2, 0 psi)
maximum: 637.5 kPa (6.5 kgf/
cm
2, 92.5 psi)Actual tire pressure -
TIREPRESS5 ID5 tire pressure/ minimum: 0
kPa (0 kgf/cm
2, 0 psi)
maximum: 637.5 kPa (6.5 kgf/
cm
2, 92.5 psi)Actual tire pressure -

TW–36TIRE AND WHEEL – TIRE PRESSURE WARNING SYSTEM
TW
OK:
All tire pressure readings are equal to the actual
tire pressure.
NOTICE:
It may take up to 1 minute to display the updated tire
pressure data.
OK
NG
(a) Select REGIT ID CODE by following the prompts
displayed on the intelligent tester.
Tire pressure warning ECU
(b) Remove the tire pressure monitor valve and transmitter
check its ID number (see page TW-61).
(c) Check whether the recorded transmitter ID and the
actual transmitter ID match.
Result
B
AEND
5CHECK ID CODE (TIRE PRESSURE WARNING VALVE AND TRANSMITTER)
Item Measurement Item / Range
(Display)Normal Condition Diagnostic Note
REGIT ID1 CODE Registered ID1 code/ minimum:
0 maximum: FFFFFFFThe ID No. registered in
transmitter ID1 is display-
REGIT ID2 CODE Registered ID2 code/ minimum:
0 maximum: FFFFFFFThe ID No. registered in
transmitter ID2 is display-
REGIT ID3 CODE Registered ID3 code/ minimum:
0 maximum: FFFFFFFThe ID No. registered in
transmitter ID3 is display-
REGIT ID4 CODE Registered ID4 code/ minimum:
0 maximum: FFFFFFFThe ID No. registered in
transmitter ID4 is display-
REGIT ID5 CODE Registered ID5 code/ minimum:
0 maximum: FFFFFFFThe ID No. registered in
transmitter ID5 is display-
F100616E01
Result Detection Condition
Unmatched A
Matched B
REPLACE TIRE PRESSUREWARNING
RECEIVER AND TRANSMITTER
PERFORM REGISTRATION (TRANSMITTER ID)

BC–6BRAKE CONTROL – VEHICLE STABILITY CONTROL SYSTEM
BC
SYSTEM DESCRIPTION
1. SYSTEM DESCRIPTION
HINT:
The skid control ECU forms a single unit with the ABS
and TRACTION actuator.
(a) ABS (Anti-lock Brake System):
The ABS helps prevent the wheels from locking
when the brakes are applied firmly or on a slippery
surface.
(1) Operation description:
The skid control ECU detects wheel lock
conditions by receiving vehicle speed signals
from each speed sensor, and sends control
signals to the pump motor and solenoid valve to
prevent wheels from locking by controlling the
brake fluid pressure of each wheel cylinder.
The ABS warning light comes on when the ABS
system malfunctions.
C115099E04

BRAKE CONTROL – VEHICLE STABILITY CONTROL SYSTEMBC–7
BC
(b) EBD (Electronic Brake Force Distribution):
The EBD control utilizes the ABS to create the
proper brake force distribution between the front
and rear wheels in accordance with the driving
conditions and vehicle load. In addition, when the
brakes are applied while cornering, it also controls
the braking forces of the right and left wheels,
helping to maintain vehicle stability.
(1) Operation description:
The skid control ECU receives speed signals
from each speed sensor to detect the slip
conditions of the wheels and sends control
signals to the solenoid.
The solenoid valve controls the brake fluid
pressure of each wheel cylinder and divides the
control power properly between the front and
rear wheels and the right and left wheels.
The brake warning light comes on to indicate
malfunctions in the EBD system.
C115100E05

BC–8BRAKE CONTROL – VEHICLE STABILITY CONTROL SYSTEM
BC
(c) BA (Brake Assist):
The primary purpose of the brake assist system is to
provide auxiliary brake force to assist drivers who
cannot generate a large enough brake force during
emergency braking, thus helping to maximize the
vehicle's braking performance.
(1) Operation description:
The skid control ECU receives speed signals
from each speed sensor and the fluid pressure
signal from the master cylinder pressure sensor
to determine whether brake assist is necessary.
If brake assist is deemed necessary, the skid
control ECU sends control signals to the pump
motor and solenoid. The pump and the solenoid
valve then control the pressure applied to each
wheel cylinder. The ABS warning light comes on
to indicate malfunctions in the BA (brake assist)
system.
w/ 16-inch disc: The brake warning light and
ABS warning light come on to indicate
malfunctions in the BA system.
C135908E01

BC–10BRAKE CONTROL – VEHICLE STABILITY CONTROL SYSTEM
BC
(1) Operation description:
The skid control ECU detects the vehicle's slip
condition by receiving signals from each speed
sensor and the ECM via CAN communication.
The skid control ECU controls engine torque
with the ECM via CAN communication and
brake fluid pressure through the pump and
solenoid valve. The slip indicator light blinks
when the system is operating.
for 4WD: The VSC warning light comes on when
the TRC system malfunctions.
for 2WD: The VSC warning light and SLIP
indicator light comes on when the TRC system
malfunctions.

BC–12BRAKE CONTROL – VEHICLE STABILITY CONTROL SYSTEM
BC
(1) Operation description:
The skid control ECU determines the vehicle
condition by receiving signals from the speed
sensor, the yaw rate and deceleration sensor
and the steering sensor. The skid control ECU
controls engine torque with the ECM via CAN
communication and brake fluid pressure through
the pump and solenoid valve. The slip indicator
light blinks and the skid control buzzer sounds
when the system is operating.
for 4WD: The VSC warning light comes on when
the TRC system malfunctions.
for 2WD: The VSC warning light and slip
indicator light come on when the TRC system
malfunctions.
(f) Downhill Assist Control:
When the downhill assist control switch is pressed
with the shift lever on L or R range and the
accelerator and brake pedals not depressed,
downhill assist control is activated. When activated,
4-wheel hydraulic pressure control occurs in order
to maintain a constant low vehicle speed without
causing the wheels to become locked. Thus, the
vehicle can descend a steep hill in a stable manner.
HINT:
• Depressing the accelerator and brake pedal
cancels control of the downhill assist control.
• Downhill assist control begins operating when
driving down on a slope at a speed of 25 km/h
(16 mph) or less with the engine brake applied.

BRAKE CONTROL – VEHICLE STABILITY CONTROL SYSTEMBC–13
BC
(1) Operation description:
The slip indicator light blinks and the downhill
assist control indicator light and brake light come
on when the system is in operation.
The VSC warning light comes on and the
downhill assist control indicator light blinks to
indicate a malfunction in the downhill assist
control.
C136089E01