Tire Monitoring System - Lamp/Buzzer ON/No DTC's Set
Suspension02-004/04
2004 RX8, 2004 MAZDA3 - TPMS (TIRE PRESSURE
MONITORING SYSTEM) WARNING LAMP ILLUMINATED
AND A WARNING BUZZER - NO DTCs - SERVICE TIP
Note:
This bulletin supersedes the following TSB(s): 02-002/03. Please update your records accordingly.
BULLETIN NOTE
This bulletin supersedes 02-002/03 issued 12/1/2003. The APPLICABLE MODEL(S)/VINS, DESCRIPTION and CHANGING TIRES ON WHEELS EQUIPPED WITH TPMS WHEEL UNITS information has been revised.
APPLICABLE MODEL(S)/VINS
2004 RX8 (TPMS is standard on all models)
2004 Mazda3 (TPMS is optional on some models)
DESCRIPTION
Some Mazda vehicles are now equipped with TPMS (Tire Pressure Monitoring System). This system consists of 4-wheel units, a control module, a warning light and a warning buzzer.
Each wheel unit consists of an internal battery (designed to last up to 10 years), an accelerometer (which turns the wheel unit on over 25 KM/h (16 MPH)), a temperature sensor, a pressure sensor and a radio transmitter (which sends information to the TPMS control module).
CAUSES OF A TPMS MIL & WARNING BUZZER
^ Aftermarket wheels or factory replacement wheels installed without wheel sensors
^ Tire pressures were adjusted with tires hot, light comes on when vehicle is cold. (Tire pressures must always be adjusted cold)
^ Low air pressure in any or all wheels {below 179.26 kpa (26 PSI)}
^ High air pressure in any or all wheels {above 337.84 kpa (49 PSI)}
^ Spare tire installed on vehicle
^ Instant Mobility System repair agent or fix-a-flat was used and is clogging a wheel unit
NOTE:
The TPMS system will turn the warning lamp off after the vehicle is driven over 25 KM/h (16 MPH).
Example:
If you correct tire pressure after repairing a flat tire, or reset tire pressure to the proper range, (such as at PDI to correct high shipping tire pressures), the TPMS warning light will stay illuminated until the vehicle is driven over 25 KM/h (16 MPH).
TIRE PRESSURE ADJUSTMENT
^ Using a "stick" or other mechanical air pressure measuring gauges may not provide accurate results. Mazda recommends using a digital type gauge for best results. Example: Accutire model # GMS-4000.
^ Perform tire pressure adjustment when tires are cold. Tire pressure will vary according to the tire temperature. When pressure is adjusted on hot tires to the cold inflation pressure, the TPMS warning lamp I buzzer may turn on after the tires cool and pressure drops below specification.
^ Perform tire pressure adjustment at least every six months. On average, there is enough pressure loss to set the TPMS warning lamp / buzzer after six months.
NOTE:
Please advise customers of the tire pressure adjustment information to avoid unnecessary visits to the dealership.
CAUTION:
The wheel unit air pressure stem is made from aluminum and can be damaged. Do not tilt or use excessive side force when checking air pressure or filling tire with air. Some tire pressure gauges and air filling nozzles have extended tips, which can provide enough leverage to easily bend or break the wheel unit.
CHANGING TIRES ON WHEELS EQUIPPED WITH TPMS WHEEL UNITS
1. Remove the wheel from the vehicle.
2. Remove the valve stem cap.
3. Remove schrader valve.
4. Un-bolt the TPMS wheel unit (11 mm deep socket). Allow the sensor to fall into the wheel.
NOTE:
This will prevent damage to the sensor while the tire is removed from the wheel with a tire removal machine.
5. Remove the tire from the wheel. Recover the TPMS wheel unit and store it in a safe place.
NOTE:
RX8 - If IMS (Instant Mobility System) repair fluid was used, be sure to recover the fluid and dispose of it following local waste disposal regulations. Be sure to replace the IMS fluid in the vehicle to prepare for future tire emergencies.
CAUTION:
RX8 - If IMS repair fluid was used, be sure to dispose of the old tire and replace it with a new one. The IMS fluid is not compatible with tire patches or plugs, afier using IMS fluid, the tire must be disposed of and replaced.
6. Place the TPMS wheel unit into the wheel, make sure the seal is fully seated as in the figure below.
7. Install the TPMS wheel unit nut by hand and turn at least 2 - full revolutions by hand.
^ Torque the wheel unit nut slowly (approximately 1-turn in 10-seconds) to 7 to 8 NM (62 to 70 in lb).
CAUTION:
The wheel unit air pressure stem is made from aluminum and can be damaged. Do not tilt or use excessive side force when installing the wheel unit nut. Most torque wrenches or ratchets provide enough leverage to easily bend or break the wheel unit when excessive side force is applied.
8. Install the tire to the wheel:
CAUTION:
Use care when installing the tire to the wheel with the bar. Place the bar on the rim in a location that will not contact the sensor.
9. Seat the tire bead.
10. Install the schrader valve.
11. Inflate the tire to specifications (see label on driver door).
CAUTION:
The wheel unit air pressure stem is made from aluminum and can be damaged. Do not tilt or use excessive side force when checking air pressure or filling tire with air. Some tire pressure gauges and air filling nozzles have extended tips, which can provide enough leverage to easily bend or break the wheel unit.
12. Install the valve stem cap.
13. Install the wheel to the vehicle.
14. Torque all wheel nuts to 88 to 118 NM (65 to 87 ft lb) in a criss-cross pattern.
15. Verify that the TPMS system operates properly.
Drive vehicle over 25 KM/h (16 MPH) to verify TPMS warning buzzer and light remain off.
WHEEL SWAP
After swapping a wheel or wheels from one vehicle to another it is necessary to register the ID codes of the new wheel unit(s) to each vehicles TPMS control module.
1. Swap wheel or wheels from one TPMS equipped vehicle to the other.
2. Torque all wheel nuts to 88 to 118 NM (65 to 87 ft lb) in a criss-cross pattern.
3. Perform Wheel Unit Auto Registration:
a. Turn ignition on.
b. Turn ignition off.
c. Leave vehicle with engine off for more than 15 minutes.
d. Drive each vehicle over 25 KM/h (16 MPH) for more than 10 minutes to register the new ID codes.
AFTERMARKET WHEELS
The TPMS system is a safety system that identifies certain tire pressure concerns to the vehicle operator. In order to change wheels from factory to aftermarket, it is imperative to maintain the proper operation of the TPMS system.
WARNING:
Aftermarket wheels must be designed to accept TPMS sensors to meet NHTSA's requirements. Attempts to disable a safety system to accept non-conforming aftermarket wheels (or even a standard wheels with even one sensor removed) is not only reducing safety, but as the system that has been Federally mandated, your effort might result in a NHTSA enforcement action as well as subject you to tire failure related lawsuits. Do not disable the TPMS system.
1. Verify that the TPMS wheel units can be mounted on the new wheels:
^ Check for interference between the TPMS wheel unit, tire or wheel. If there is interference, do not install the aftermarket wheels.
^ Check for proper seating and sealing of the TPMS valve stem seal.
^ Check proper fit of the wheel unit and valve stem.
2. If there are no signs of interference or sealing problems with the new wheels, proceed to Install the tires to the wheels, following the instructions above for CHANGING TIRES ON WHEELS EQUIPPED WITH TPMS WHEEL UNITS.
3. Verify all tire pressures are correct. (See label on driver door).
4. Verify that the TPMS system operates properly.
^ Drive vehicle over 25 KM/h (16 MPH) for 3-minutes to verify TPMS warning buzzer and light remain off.
REPLACING A TPMS WHEEL UNIT
This procedure should be used whenever it is necessary to replace a TPMS sensor.
1. Follow the instructions above for CHANGING TIRES ON WHEELS EQUIPPED WITH TPMS WHEEL UNITS.
2. Verify tire pressure is correct. (See label on driver door).
3. Perform Wheel Unit Auto Registration:
a. Turn ignition on.
b. Turn ignition off
c. Leave vehicle with engine off for more than 15 minutes.
d. Drive vehicle over 25 KM/h (16 MPH) for more than 10 minutes to register the new ID codes.
SPARE TIRE MAZDA3 & TRUNK MOUNTED SPARE TIRE KIT (RX8-OPTION)
The TPMS system does not include a sensor for the spare tire on the Mazda3 or the accessory trunk mounted spare tire kit available for RX8. This means that the spare tire will not be monitored for tire pressure. The spare tire should be checked at regular services to verify proper pressure and tire condition.
When the spare tire is installed to a wheel of the vehicle, the TPMS system will illuminate the TPMS warning light and the warning buzzer may sound.
When a temporary spare tire is in use, the customer must follow special instructions found in the owner's manual and on the tire sidewall involving speed and distance limitations.