radio TOYOTA RAV4 2006 Service User Guide

TW–28TIRE AND WHEEL – TIRE PRESSURE WARNING SYSTEM
TW
DESCRIPTION
The tire pressure warning valve and transmitter that is installed in the tires and wheels measures the air
pressure of the tires. The measured values are transmitted to the tire pressure warning receiver on the
body as radio waves and then sent to the tire pressure warning ECU. The ECU compares the measured
air pressure values with the air pressure threshold. When the measured air pressure values are less than
this threshold, the warning light in the combination meter turns on.
The tire pressure warning ECU stores a DTC when the tire pressure monitor valve stops transmitting
signals. At this time, forcibly transmit the signals by releasing the tire pressure rapidly. The stored DTC is
cleared when the signal transmission is resumed.
HINT:
It is necessary to perform the procedure to identify the tire pressure monitor valve that is malfunctioning
because it cannot be identified by the output DTC.
DTC C2111/11 Transmitter ID1 Operation Stop
DTC C2112/12 Transmitter ID2 Operation Stop
DTC C2113/13 Transmitter ID3 Operation Stop
DTC C2114/14 Transmitter ID4 Operation Stop
DTC C2115/15 Transmitter ID5 Operation Stop
DTC No DTC Detection Condition Trouble Area
C 2 111 / 11
C2112/12
C2113/13
C2114/14
C2115/15Tire pressure monitor valve stops transmitting
signals• Tire pressure warning valve and
transmitter
• Tire pressure warning ECU

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