Last Modified: 7-3-2017 6.8:8.0.40 Doc ID: RM000000XMK00XX
Model Year Start: 2007 Model: LX470 Prod Date Range: [08/2006 -           ]
Title: TIRE AND WHEEL: TIRE PRESSURE WARNING SYSTEM: PRECAUTION; 2007 MY LX470 [08/2006 -        ]

PRECAUTION

1. NOTICE FOR INITIALIZATION

NOTICE:

When disconnecting the cable from the negative (-) battery terminal, initialize the following system(s) after the cable is reconnected.

System Name

See procedure

Meter/Gauge System

2007 MY LX470 [08/2006 -        ]; INTRODUCTION: REPAIR INSTRUCTION: INITIALIZATION

Variable gear Ratio Steering System

2. TIRE PRESSURE WARNING SYSTEM PRECAUTION

(a) When the tire pressure warning light comes on, immediately check the pressure of the tire and adjust it to the specified value. (The tire pressure warning light will come on if there is an open in the tire pressure warning light circuit.)

NOTICE:

Check the spare tire as well since this system monitors pressure of all tires including the spare tire.

Cold tire inflation pressure

Front

Rear

Spare

200 kPa (2.0 kgf/cm 2 , 29 psi)

Trailer Towing

220 kPa (2.2 kgf/cm 2 , 32 psi)

Trailer Towing

220 kPa (2.2 kgf/cm 2 , 32 psi)

Trailer Towing

220 kPa (2.2 kgf/cm 2 , 32 psi)

240 kPa (2.4 kgf/cm 2 , 35 psi)

240 kPa (2.4 kgf/cm 2 , 35 psi)

(b) When the tire pressure warning light blinks, there is a malfunction in the system. Check for DTCs.

(c) Changing the tire pressure warning select switch between "MAIN" and "2nd" allows registration of 2 transmitter ID sets. Check the tire pressure warning select switch to see whether the tire is registered in "MAIN" or "2nd".

If the vehicle is driven without selecting the tire pressure select warning switch correctly, the tire pressure warning ECU and receiver determines the system is malfunctioning and causes the tire pressure warning light to blink.

(d) It is necessary to register the transmitter ID in the tire pressure warning ECU and receiver after replacing the tire pressure warning valve and transmitter and/or tire pressure warning ECU and receiver 2007 MY LX470 [08/2006 -        ]; TIRE AND WHEEL: TIRE PRESSURE WARNING SYSTEM: REGISTRATION .

(e) When replacing the tire pressure warning ECU and receiver:

(1) Using the DATA LIST, read the transmitter IDs registered in the ECU and make a note of them before removing the tire pressure warning ECU and receiver.

(2) Register the transmitter IDs after installing a new tire pressure warning ECU and receiver.

(f) Precautions about the tire pressure:

  • The tire pressures decrease naturally.
  • In winter, tire pressure may decrease due to low ambient temperatures (tire pressure decreases by approximately 10 kPa (0.1 kgf/cm 2 , 1.45 psi) for every 10°C (50°F) drop in the ambient temperature). Therefore, the tire pressure warning is more likely to operate if the tire pressures are not adjusted appropriately. If the daily temperature variation is large, pressurize the tires high so that the tire pressures are suitable under cold conditions. As a result, incorrect tire pressure warning operation should decrease.

(g) When replacing the tire pressure warning valve and transmitter:

(1) Take a note of the 7 digit number (transmitter ID) written on the tire pressure warning valve and transmitter when replacing it. Register the transmitter IDs in the tire pressure warning ECU and receiver after replacing the tire pressure warning valve and transmitter and installing the tires and wheels on the vehicle.

NOTICE:

The transmitter ID is written on the tire pressure warning valve and transmitter. The ID will be unable to be read after installing the tire pressure warning valve and transmitter on the tire and wheel. Therefore, take a note of the transmitter ID before installing the tire pressure warning valve and transmitter.

3. IN CASE OF TIRE AND WHEEL REPLACEMENT

(a) When tires and wheels are replaced, always ensure to register the transmitter ID correctly.

4. INITIALIZATION PRECAUTION

(a) Initialize the tire pressure warning system after any of the following is performed:

  • Replacing the tire pressure warning ECU and receiver and/or the tire pressure warning valve and transmitter.
  • When the tire inflation pressure standard value needs to be changed due to a change in planned traveling speed, load weight, etc.

HINT:

The tire pressure warning system will not operate properly if it is not initialized 2007 MY LX470 [08/2006 -        ]; TIRE AND WHEEL: TIRE PRESSURE WARNING SYSTEM: INITIALIZATION .

5. FAIL-SAFE FUNCTION

(a) When a malfunction occurs in the tire pressure warning system, the tire pressure warning light blinks and informs the driver of the system failure.

(b) The result of this diagnosis is stored in the tire pressure warning ECU and receiver.

6. CHECK TIRE PRESSURE AFTER REPAIRS

(a) After repairs, confirm that the actual tire pressures are displayed in the DATA LIST 2007 MY LX470 [08/2006 -        ]; TIRE AND WHEEL: TIRE PRESSURE WARNING SYSTEM: DATA LIST / ACTIVE TEST .