Originally Posted by
inuvik
Well, technically US models CAN store two sets of TPMS codes. It's just that NO ONE (not even dealers so far) have been able to do it successfully. It's in the FSM and I posted the process awhile back. So I apologize for the formatting because it was a copy/paste from the FSM:
TPMS SPECIAL FUNCTION
TIRE PRESSURE SENSOR ID REGISTRATION
M1311003900162
"Tire Pressure Sensor ID Registration": To enter the ID into Set 1 when the TPMS transmitter or the ETACS-ECU <vehicles without Keyless Operation System> or KOS&OSS-ECU <vehicles with Keyless Operation System> is replaced.
"Tire PRS. Sensor ID Reg.(Set2)": To enter the ID into Set 2 when the TPMS transmitter or the ETACS-ECU <vehicles without Keyless Operation System> or KOS&OSS-ECU <vehicles with Keyless Operation System> is replaced.
ON-VEHICLE SERVICE
TSB Revision
WHEEL AND TIRE 31-43
"TIRE PRESSURE SENSOR ID REGISTRATION" METHOD
1.Select "4tires ID Reg. (Change tire PRS.)" and start the tire pressure sensor ID registration.
CAUTION
Register all tire pressure sensor IDs within twenty minutes.
2."4 SNSR ID Registration Do you want to start? Note Finish ID Registration within 20 minutes." is displayed. Then, press "OK."
NOTE:
If the ID code registration is not finished within 20 minutes, all the ID codes registered in the TPMS transmitter before will be erased. For this reason, the ID codes need to be registered again.
3.Decrease the tire pressure to 189 kPa (27.4 psi) or less by changing 20 kPa (2.9 psi) or more, and register the tire pressure sensor ID code of each wheel to ETACS-ECU <vehicles without Keyless Operation System> or KOS&OSS-ECU <vehicles with Keyless Operation System>.
NOTE:
.
You can start out the following operations from any TPMS transmitter. The tire pressure sensor ID registration has no order.
On completion of the tire pressure sensor ID code registration, the tire pressure sensor ID code is displayed on the scan tool MB991958 screen.
scan tool MB991958 cannot identify which registered TPMS transmitter is used for each wheel. For this reason, write down the tire number for each wheel when the tire number and ID code is displayed on the scan tool MB991958 during ID code registration.
It may take approximately one minute for the ID code to be displayed on the scan tool MB991958 screen after the tire pressure is reduced.
If the ID code is not displayed, reduce the tire pressure another 20 kPa (2.9 psi) or more. If the ID code is not displayed yet, rotate the tire to displace the TPMS transmitter, and reduce the tire pressure 20 kPa (2.9 psi) or more again.
If the ID code cannot be registered for all the four wheels, the ETACS-ECU <vehicles without Keyless Operation System> or KOS&OSS-ECU <vehicles with Keyless Operation System> may be faulty, thus replace the ETACS-ECU <vehicles without Keyless Operation System> or KOS&OSS-ECU <vehicles with Keyless Operation System>.
If the ID code can be registered for one wheel or more, the TPMS transmitter in which the code cannot be registered may be faulty, thus replace that TPMS transmitter.
ON-VEHICLE SERVICE
TSB Revision
31-44 WHEEL AND TIRE
4."4 SNSR ID Registration Completed." is displayed. Then, select "OK."
NOTE:
The TPMS indicator illuminates for tire pressure alarm.
5.After one minute or more has passed, correct the tire pressure for all wheels with ignition switch (engine starting switch) "ON".
6.Check the data list "Registered ID reception, Tire 1, 2, 3, 4" if "YES" is displayed for each tire. When "NO" is displayed, drive the vehicle for approximately 5 minutes, check the display again. If "NO" is still displayed, register the ID code again.
"TIRE PRS. SENSOR ID REG. (Set2)" METHOD
Follow "Tire Pressure Sensor ID Registration" method.
TIRE PRESSURE SENSOR ID CHECK
M1311004100095
"TIRE PRESSURE SENSOR ID CHECK" METHOD
You can check the tire pressure sensor ID on the diagnosis screen as described below.
1.Operate scan tool MB991958 as follows:
Press "Special function" button on the diagnosis screen.
Select "Tire Pressure Sensor ID Check" from the "Special function" menu.
CAUTION
If two sets of the IDs have been registered, the scan tool MB991958 will display the IDs of the wheels which are currently effective in the vehicle.
2.Check the tire pressure sensor IDs on the scan tool MB991958 screen.
TPMS TRANSMITTER CHECK
M1311004000117
According to the following procedures, identify which registered TPMS transmitter corresponds to which wheel, and check the tire pressure and acceleration value of each TPMS transmitter.
1.Check the data list "Air Pressure, Tire1, 2, 3, 4" and write down the tire pressure for all wheels.
NOTE:
The display at this time is the data received most recently.
2.Perform the following procedures for four wheels in order, identify the wheel by checking the tire pressure of each wheel.
(1)Change the pressure of tire for 20 kPa (2.9 psi) or more so that the TPMS transmitter sends the latest sensor data (The tire pressure can either be decreased or increased).
(2)Check the data list screen to determine which tire number corresponds to the wheel whose tire pressure has changed.
WHEEL AND TIRE
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WHEEL AND TIRE 31-45
NOTE:
.
It may take approximately one minute that the data of tire pressure change is displayed on the scan tool MB991958 screen.
If the data of tire pressure change is not displayed on the scan tool MB991958 screen, the most possible cause is that the radio wave sent from the TPMS transmitter cannot be received. In this case, the radio wave may be received by performing the procedures from (1) again after turning the tire to change the TPMS transmitter position. If the tire pressure change is still not displayed on the scan tool MB991958 screen, the TPMS transmitter in which the ID code is not registered may be installed, or the TPMS transmitter may be faulty. Therefore, perform ID code registration or replace the TPMS transmitter according to the instructions of troubleshooting for DTCs. (At this time, do not register the ID codes or replace the TPMS transmitter.)
3.Check the tire pressure or acceleration value shown in the screen (if needed).
4.After checking by the tire pressure change, adjust the checked tire pressure to the proper value.