TOYOTA RAV4 2006 Service Repair Manual

TIRE AND WHEEL – TIRE PRESSURE WARNING SYSTEMTW–29
TW
WIRING DIAGRAM
INSPECTION PROCEDURE
NOTICE:
It is necessary to register an ID code after replacing the tire pressure warning antenna and
receiver and/or the tire pressure warning ECU (see page TW-9).
(a) Set the pressure of each tire to the specified value.
Standard pressure:
220 kPa (2.2 kgf/cm
2, 32 psi)
(b) Connect the intelligent tester (with CAN VIM) to the
DLC3.
(c) Turn the ignition switch ON.
(d) Select TIREPRESS by following the prompts displayed
on the intelligent tester.
Tire pressure warning ECU
1PERFORM FORCED TRANSMISSION OF TRANSMITTER ID OF ALL WHEELS
E118453E14
Item Measurement item / Range
(Display) Normal Condition Diagnostic Note
TIREPRESS1 ID1 tire pressure / min.: 0 kPa
(0 kgf/cm
2, 0 psi), max.: 637.5
kPa (6.48 kgf/cm2, 92.2 psi) Actual tire pressure -
TIREPRESS2 ID2 tire pressure / min.: 0 kPa
(0 kgf/cm
2, 0 psi), max.: 637.5
kPa (6.48 kgf/cm2, 92.2 psi) Actual tire pressure -
TIREPRESS3 ID3 tire pressure / min.: 0 kPa
(0 kgf/cm
2, 0 psi), max.: 637.5
kPa (6.48 kgf/cm2, 92.2 psi) Actual tire pressure -

TW–30TIRE AND WHEEL – TIRE PRESSURE WARNING SYSTEM
TW
(e) Rapidly release the pressure from each wheel by
approximately 40 kPa (0.4 kgf/cm
2, 5.8 psi) for 30
seconds or more.
(1) Check that each tire pressure data displayed on the
intelligent tester screen changes.
OK:
The tire pressure data displayed on the
intelligent tester screen changes with the
value of the tire pressure.
NOTICE:
• It may take up to 1 minute to display the
updated tire pressure data.
• When the TIREPRESS data (IDs 1 to 5)
changes, reset the tire pressure of the tires to
the specified value, rotate the tires 90 to 270

and recheck.
(2) After confirming that the tire pressure data displayed
on the intelligent tester screen has changed, set the
pressure of each tire to the specified value.
Standard pressure:
220 kPa (2.2 kgf/cm
2, 32 psi)
HINT:
If the tire pressure data displayed on the intelligent
tester screen has not changed after rechecking, go
to the troubleshooting procedures of DTCs C2121/
21 to C2125/25 which indicate transmission or
reception malfunctions (see page TW-28).
NG
OK
TIREPRESS4 ID4 tire pressure / min.: 0 kPa
(0 kgf/cm2, 0 psi), max.: 637.5
kPa (6.48 kgf/cm2, 92.2 psi) Actual tire pressure -
TIREPRESS5 ID5 tire pressure / min.: 0 kPa
(0 kgf/cm
2, 0 psi), max.: 637.5
kPa (6.48 kgf/cm2, 92.2 psi) Actual tire pressure - Item Measurement item / Range
(Display) Normal Condition Diagnostic Note
CHECK OTHER PROBLEM (MALFUNCTION
IN TRANSMISSION OR RECEPTION
FUNCTION)
END

TIRE AND WHEEL – TIRE PRESSURE WARNING SYSTEMTW–31
TW
DESCRIPTION
The tire pressure warning valve and transmitter constantly sends radio waves to the tire pressure warning
ECU.
Under the following conditions, the tire pressure warning antenna and receiver is unable to receive the
signals from the tire pressure warning valve and transmitter, and a DTC is output.
• Areas, facilities, or devices that use similar radio frequencies are located in the vicinity of the vehicle.
• Devices using similar radio frequencies are used in the vehicle.
DTCs C2121/21 to C2125/25 can only be deleted by the tester. DTCs C2181/81 to C2185/85 can be
deleted when the transmitter sends a forced transmission signal or the test mode ends. DTCs C2181/81
to C2185/85 are output only in the test mode.
HINT:
When no signals are received for 60 minutes or more, a DTC is output.
It is necessary to perform the procedure to identify the tire pressure warning valve and transmitter that is
malfunctioning because it cannot be identified by the output DTC.
DTC C2121/21 No Signal from Transmitter ID1 in Main Mode
DTC C2122/22 No Signal from Transmitter ID2 in Main Mode
DTC C2123/23 No Signal from Transmitter ID3 in Main Mode
DTC C2124/24 No Signal from Transmitter ID4 in Main Mode
DTC C2125/25 No Signal from Transmitter ID5 in Main Mode
DTC C2181/81 Transmitter ID1 not Received (Test Mode DTC)
DTC C2182/82 Transmitter ID2 not Received (Test Mode DTC)
DTC C2183/83 Transmitter ID3 not Received (Test Mode DTC)
DTC C2184/84 Transmitter ID4 not Received (Test Mode DTC)
DTC C2185/85 Transmitter ID5 not Received (Test Mode DTC)
DTC No. DTC Detection Condition Trouble Area
C2121/21
C2122/22
C2123/23
C2124/24
C2125/25These DTCs are detected when no signals
are received for 51 minutes or more, after a
vehicle speed of 5 mph (8 km/h) or more is
detected and no signals are received for 12
minutes or more• Tire pressure warning valve and
transmitter
• Tire pressure warning antenna and
receiver
• Tire pressure warning ECU
• Wire harness
C2181/81
C2182/82
C2183/83
C2184/84
C2185/85Malfunction in transmission / reception circuit • Tire pressure warning valve and
transmitter
• Tire pressure warning antenna and
receiver
• Tire pressure warning ECU
• Wire harness

TW–32TIRE AND WHEEL – TIRE PRESSURE WARNING SYSTEM
TW
WIRING DIAGRAM
INSPECTION PROCEDURE
NOTICE:
It is necessary to register an ID code after replacing the tire pressure warning valve and
transmitter and/or the tire pressure warning ECU (see page TW-9).
(a) Set the pressure of each tire to the specified value.
Standard pressure:
220 kPa (2.2 kgf/cm
2, 32 psi)
(b) Connect the intelligent tester (with CAN VIM) to the
DLC3.
(c) Turn the ignition switch ON.
(d) Select TIREPRESS by following the prompts displayed
on the intelligent tester.
Tire pressure warning ECU
1IDENTIFY TRANSMITTER (CORRESPONDING TO DTC)
E118453E14
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 -

TIRE AND WHEEL – TIRE PRESSURE WARNING SYSTEMTW–33
TW
(e) Rapidly release the tire pressure from any tire by 40 kPa
(0.4 kgf/cm
2, 5.8 psi) for 30 seconds or more.
HINT:
• Identify the malfunctioning tire pressure warning valve
and transmitter by rapidly releasing the tire pressures
from each tire.
• Record which TIREPRESS data (ID1 to ID5)
corresponds to each tire.
(f) Check the DATA LIST.
Result
NOTICE:
• It may take up to 1 minute to display the updated
tire pressure data.
• When the TIREPRESS data (IDs 1 to 5) changes,
reset the tire pressure of the tires to the specified
value, rotate the tires 90 to 270
and recheck.
• When the transmitter is normal, record the tire
location and the transmitter ID.
(g) When the TIREPRESS data (IDs 1 to 5) changes, repeat
the same procedure on the rest of the tires (one by one)
to identify which tire pressure warning valve and
transmitter the DTC corresponds to.
(h) Set the pressure of each tire to the specified value.
Standard pressure:
220 kPa (2.2 kgf/cm
2, 32 psi)
(i) Check all transmitters of the tires.
Result
B
C
A
TIREPRESS4 ID4 tire pressure/ minimum: 0
kPa (0 kgf/cm2, 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 - Item Measurement Item / Range
(Display)Normal Condition Diagnostic Note
Condition Detection Condition
One of TIREPRESS data (ID1 to ID5) changed Normal
No TIREPRESS data changed Transmitter corresponding to DTC
Result Detection Condition
One or more of transmitters
abnormalA
All abnormal B
All normal C
Go to step 3
END

TW–34TIRE AND WHEEL – TIRE PRESSURE WARNING SYSTEM
TW
(a) Select REGIT ID CODE by following the prompts
displayed on the intelligent tester.
Tire pressure warning ECU
(b) Remove the tire pressure warning valve and transmitter
and check its ID number (see page TW-61).
(c) Check whether the recorded transmitter ID and the
actual transmitter ID match.
Result
B
A
2CHECK 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 PRESSURE WARNING
VALVE AND TRANSMITTER
PERFORM REGISTRATION (TRANSMITTER ID)

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