warning TOYOTA RAV4 2006 Service Owner's Manual

TIRE AND WHEEL – TIRE PRESSURE WARNING SYSTEMTW–7
TW
(b) Under the following conditions, the system may not
function properly;
• 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.
• Large amounts of snow or ice are stuck to the
vehicle, especially on the wheels and around the
wheel houses.
• The battery of the transmitter is depleted.
• Tires and wheels without tire pressure warning
valves and transmitters are used.
• Snow tires and tire chains are used.
• If wheels other than the specified ones are used,
the system may not function properly because
different radio waves are transmitted from the tire
pressure warning valve and transmitter.
• Depending on the tire type, the tire pressure
warning valve and transmitter may not function
properly even though the specified wheels are
used.
• The system may not function properly if it is
initialized with tire pressures which are not the
specified values.
(c) The average life of the grommet of the tire pressure
warning antenna and receiver is approximately 5
years, at which time it must be replaced. Retighten
the valve nut if the valve is leaking air, if it is less
than 5 years old, and there is no problem with the
grommets.
(d) After removing and installing the ECU or a sensor,
output a diagnosis code and check that it is a
normal code.
3. FUNCTION OF COMPONENTS
Components Function
Tire pressure warning antenna and receiver • Combined as a single unit with a disc wheel air valve, it measures
tire pressure and temperature, and transmits an ID number for
measurement value and identification
• Battery is built into valve
Tire pressure warning antenna and receiver Receives necessary signals from tire pressure warning antenna and
receiver and transmits them to tire pressure warning ECU
Tire pressure warning ECU • Receives signal from receiver and identifies it as vehicle's own
signal.
• If measurement value is equal to or lower than specified value, it
transmits a signal so that the air pressure warning light on
combination meter turns on.
Tire pressure warning light Located in the combination meter, it informs driver of lowered tire air
pressure and system failure

TW–8TIRE AND WHEEL – TIRE PRESSURE WARNING SYSTEM
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HOW TO PROCEED WITH
TROUBLESHOOTING
HINT:
• Use these procedures to troubleshoot the tire pressure
warning system.
• *: Use the intelligent tester.
NEXT
Standard voltage:
11 to 14 V
If the voltage is below 11 V, recharge or replace the battery
before proceeding.
NEXT
(a) Check the indicator light (see page TW-17).
NEXT
(a) Check for DTC (see page TW-20).
(b) Clear the DTC (see page TW-20).
(c) Recheck for DTC (see page TW-20).
Result
B
A
(a) Check for tire pressure warning system DTC output (see
page TW-22).
NEXT
1VEHICLE BROUGHT TO WORKSHOP
2INSPECT BATTERY VOLTAGE
3CHECK INDICATOR LIGHT
4CHECK DTC*
Result Proceed to
DTC reoccurs A
DTC does not reoccur B
Go to step 6
5DTC CHART

TIRE AND WHEEL – TIRE PRESSURE WARNING SYSTEMTW–9
TW
NEXT
Result
B
A
(a) Terminals of ECU (see page TW-16).
(b) DATA LIST/ACTIVE TEST (see page TW-21).
NEXT
NEXT
NEXT
6PROBLEM SYMPTOM CONFIRMATION
7PROBLEM SYMPTOMS TABLE
Result Proceed to
Fault is not listed in problem symptoms
tableA
Fault is listed in problem symptoms
tableB
Go to step 9
8OVERALL ANALYSIS AND TROUBLESHOOTING*
9REPAIR OR REPLACE
10CONFIRMATION TEST
END

TW–10TIRE AND WHEEL – TIRE PRESSURE WARNING SYSTEM
TW
REGISTRATION
1. IN CASE OF TIRE PRESSURE WARNING ECU
REPLACEMENT
(a) Read ID stored in the old ECU using the intelligent
tester.
2. IN CASE OF TIRE PRESSURE WARNING VALVE AND
TRANSMITTER AND/OR TIRE PRESSURE WARNING
ECU REPLACEMENT
(a) Read the ID written on the tire pressure monitor
valve.
3. REGISTER TRANSMITTER ID
NOTICE:
It is necessary to register the transmitter ID in the
tire pressure warning ECU when replacing the tire
pressure warning valve and transmitter and/or tire
pressure warning ECU.
(a) Prepare all of the transmitter ID data before starting
registration.
HINT:
• Read the registered transmitter IDs that are
stored in the ECU using the intelligent tester and
make a note of them.
• If reading stored transmitter IDs is impossible
due to malfunctions of components such as the
tire pressure warning antenna and receiver,
remove the tires from the wheels and check the
IDs located on the tire pressure warning valves
and transmitters (see page TW-60).
• When replacing the tire pressure warning valves
and transmitters, make a note of the IDs written
on the tire pressure warning valves and
transmitters.
(b) Connect the intelligent tester (with CAN VIM) to the
DLC3.
(c) Turn the ignition switch ON.
(d) *1: Read and write down the ID (ID1 to ID5) by
using the DATA LIST.
C124986E02
F100621

TIRE AND WHEEL – TIRE PRESSURE WARNING SYSTEMTW–11
TW
(e) *2: Select REGIST TIRE SET following the
intelligent tester screen (UTILITY - REGIST TIRE
SET).
(f) *3: Select the registration mode "MAIN".
(g) Input the ID (ID1 to ID5) using the intelligent tester
and transmit it to the tire pressure warning ECU.
F100622
F100623

TW–12TIRE AND WHEEL – TIRE PRESSURE WARNING SYSTEM
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(h) Set the ID transmission condition to "ID Registration
is complete".
HINT:
• The previously registered IDs will be deleted
from the memory when the registration is
completed.
• If the operations of *1 to *3 are not completed
within 5 minutes, the mode will return to normal
operation mode.
4. CONFIRMATION OF TRANSMITTER ID
REGISTRATION
(a) Set the tire pressure of all wheels (including the
spare tire) to the specified value.
Standard pressure:
220 kPa (2.2 kgf/cm
2, 32 psi)
F101083E01

TIRE AND WHEEL – TIRE PRESSURE WARNING SYSTEMTW–13
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(b) Connect the intelligent tester (with CAN VIM ) to the
DLC3.
(c) Turn the ignition switch ON.
(d) Select "SIGNAL CHECK" mode on the intelligent
tester (with CAN VIM ) (see page TW-12).
(e) Confirm that the transmitter IDs and tire pressure
data for all the tires are displayed on the intelligent
tester screen.
NOTICE:
• It may take up to 1 minute to update the tire
pressure data.
• If the IDs have not been registered, DTC
C2171/71 is set in the tire pressure warning
ECU after approximately 60 minutes.

TW–14TIRE AND WHEEL – TIRE PRESSURE WARNING SYSTEM
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TEST MODE PROCEDURE
1. TEST MODE CHECK
HINT:
• When entering the TEST MODE, the tire pressure
warning ECU sets all the test DTCs first. After
completing the test mode for each inspection item, the
DTCs that are determined normal by the tire pressure
warning ECU will be erased.
The DTCs for other inspection items may not be
erased when only a certain signal is inspected.
• When the test mode returns back to the normal mode,
all the test DTCs will be erased.
(a) Make sure that the ignition switch is OFF.
(b) Connect the intelligent tester (with CAN VIM) to the
DLC3.
(c) Turn the ignition switch ON.
(d) Select TEST MODE on the intelligent tester.
B127989E01
C122887

TIRE AND WHEEL – TIRE PRESSURE WARNING SYSTEMTW–15
TW
(e) Confirm that the tire pressure warning light in the
combination meter blinks at 0.125 second intervals.
2. PERFORM SIGNAL CHECK
HINT:
• When entering the signal check, the tire pressure
warning ECU sets all the signal check DTCs first.
After completing the signal check for each inspection
item, the DTCs that are determined normal by the tire
pressure warning ECU will be erased. The DTCs for
other inspection items may not be erased when only a
certain signal is inspected.
• When the signal check returns back to normal mode,
all the signal check DTCs will be erased.
(a) Make sure that the ignition switch is OFF.
(b) Connect the intelligent tester (with CAN VIM ) to the
DLC3.
(c) Turn the ignition switch ON.
(d) Select SIGNAL CHECK on the intelligent tester.
(e) Drive the vehicle at 12 mph (20 km/h) or more for 10
seconds or more .
F100632E01
B127989E01

TW–16TIRE AND WHEEL – TIRE PRESSURE WARNING SYSTEM
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(f) Loosen the valve core and rapidly reduce the
pressure (above 40 kPa / 30 seconds or more).
HINT:
The transmitter ID can be transmitted by rapidly
reducing the tire pressure.
(g) Result
HINT:
After the signal check is completed, check for a
DTC and signal check DTC to confirm the system
status.
(h) End of SIGNAL CHECK
After completing test mode (SIGNAL CHECK), turn
the ignition switch OFF and disconnect the tester.
DTC of SIGNAL CHECK (TEST DIAGNOSIS)
function:
If a malfunction code is displayed during the
test mode DTC check, check the circuit listed
for that code. For details of each code, refer to
the "see page" of the "DTC No." in the chart.
F101084
Condition Procedure
SIGNAL CHECK DTC is output Repair faulty part and enter SIGNAL CHECK again
SIGNAL CHECK DTCs are cleared No problem