丰田Toyota RAV4 Repair Manual/Tire and Wheel.pdf
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1、TW4 TIRE AND WHEEL TIRE PRESSURE WARNING SYSTEM TW PARTS LOCATION REAR TIRE PRESSURE WARNING VALVE AND TRANSMITTER LH REAR TIRE PRESSURE WARNING VALVE AND TRANSMITTER RH TIRE PRESSURE MONITOR VALVE AND TRANSMITTER (Spare) FRONT TIRE PRESSURE WARNING VALVE AND TRANSMITTER LH FRONT TIRE PRESSURE WARNI
2、NG VALVE AND TRANSMITTER RH TIRE PRESSURE WARNING ANTENNA AND RECEIVER TIRE PRESSURE WARNING ECU COMBINATION METER - TIRE PRESSURE WARNING LIGHT INSTRUMENT PANEL JUNCTION BLOCK - IG1 RELAY - ECU-IG1 FUSE - GAUGE FUSE F101018E01 TIRE AND WHEEL TIRE PRESSURE WARNING SYSTEM TW5 TW SYSTEM DIAGRAM : Comb
3、ination Meter (Vehicle Speed Signal) Combination Meter (Tire Pressure Warning Light) Tire Pressure Warning Antenna and Receiver DLC3 Front Tire Pressure Warning Valve and Transmitter LH Rear Tire Pressure Warning Valve and Transmitter RH Tire Pressure Warning Valve and Transmitter (Spare) Rear Tire
4、Pressure Warning Valve and Transmitter LH Front Tire Pressure Warning Valve and Transmitter RH Radio Signal Tire Pressure Warning ECU F101015E02 TW6 TIRE AND WHEEL TIRE PRESSURE WARNING SYSTEM TW SYSTEM DESCRIPTION 1.DESCRIPTION OF SYSTEM (a)A tire pressure warning antenna and receiver is equipped w
5、ith a tire pressure sensor and a transmitter and is installed in each tire wheel. The sensor measures the tire pressure and internal temperature of the tire. Then the measured value and transmitter ID are transmitted to the tire pressure monitor receiver on the body as radio waves, which are sent to
6、 the tire pressure warning ECU. If the transmitter ID has already been registered, the ECU compares the measured air pressure value with the standard value. When the value is less than the standard value registered in the tire pressure warning ECU, the warning light in the combination meter turns on
7、. 2.WHEN TIRE PRESSURE WARNING LIGHT IS LIT (a)When the tire pressure warning light does not turn off, or when it turns on during driving, check the tire pressure. If the tire pressure warning light turns on within several hours after adjusting the tire pressure, the tire may have a slow air leak. F
8、ront Tire Pressure Warning Valve and Transmitter LH Rear Tire Pressure Warning Valve and Transmitter LH Front Tire Pressure Warning Valve and Transmitter RH Tire Pressure Warning ECU Combination Meter - Tire Pressure Warning Light Rear Tire Pressure Warning Valve and Transmitter RH Tire Pressure War
9、ning Antenna and Receiver Tire Pressure Warning Valve and Transmitter (Spare) F101016E03 TIRE AND WHEEL TIRE PRESSURE WARNING SYSTEM TW7 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 vici
10、nity 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 tra
11、nsmitters 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 va
12、lve 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 approxima
13、tely 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.FUNCTIO
14、N OF COMPONENTS ComponentsFunction Tire pressure warning antenna and receiverCombined 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
15、 and receiverReceives necessary signals from tire pressure warning antenna and receiver and transmits them to tire pressure warning ECU Tire pressure warning ECUReceives signal from receiver and identifies it as vehicles own signal. If measurement value is equal to or lower than specified value, it
16、transmits a signal so that the air pressure warning light on combination meter turns on. Tire pressure warning lightLocated in the combination meter, it informs driver of lowered tire air pressure and system failure TW8 TIRE AND WHEEL TIRE PRESSURE WARNING SYSTEM TW HOW TO PROCEED WITH TROUBLESHOOTI
17、NG 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
18、(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* ResultProceed to DTC reoccursA DTC
19、 does not reoccurB Go to step 6 5DTC CHART TIRE AND WHEEL TIRE PRESSURE WARNING SYSTEM TW9 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 ResultProceed to Fault is not listed in
20、problem symptoms table A Fault is listed in problem symptoms table B Go to step 9 8OVERALL ANALYSIS AND TROUBLESHOOTING* 9REPAIR OR REPLACE 10CONFIRMATION TEST END TW10 TIRE AND WHEEL TIRE PRESSURE WARNING SYSTEM TW REGISTRATION 1.IN CASE OF TIRE PRESSURE WARNING ECU REPLACEMENT (a)Read ID stored in
21、 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 pre
22、ssure 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
23、 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 tir
24、e 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. 7-digi
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