Beginning with some 2007 models, Honda is using a second type of TPMS that does not use initiators that were featured in 2006 and earlier systems. This Honda TSB applies to all 2008 Accords, all 2008 Civics, all 2007-2008 CR-Vs, all 2007-2008 Elements, all 2008 Fits, all 2007-2008 Odysseys (except Touring) and all 2008 S2000s.
All TPMS sensors are mounted on the inside of the rim, connected to the valve stem. All use a wireless transmission to send tire pressure and temperature information to the TPMS unit. All use non-replaceable batteries. To save battery life, the sensors turn on only when the vehicle is being used.
The first type of TPMS (all through 2006) uses initiators mounted above each wheel. When the ignition switch is turned on, the initiators send out a low frequency signal to turn on the TPMS sensors. The initiator, in conjunction with the TPMS control unit, determines tire location. For example, if the right front tire is low on air, the customer sees the low tire pressure indicator and an indication that the right front tire pressure is low. The initiator type TPMS (or location type TPMS) is used on the 2005-2008 Pilot, 2006-2008 Ridgeline and the 2005-2008 Odyssey Touring models.
The new initiator-less TPMS (no-location type) does not use initiators. The TPMS sensors have a built-in acceleration sensor that turns on the TPMS sensors when vehicle speed reaches about 25 mph. Without an initiator, the TPMS control unit cannot determine tire location. For example, if the right front tire is low on air, the customer sees only the low pressure indicator and must check all four tires to locate the problem tire. During diagnosis, the TPMS control unit provides a code for each tire. The TPMS control unit provides a tire number, but you need to perform the sensor position check to find the tire location of the tire number.
A TPMS sensor tool is used for troubleshooting and replacing the TPMS sensors.
TPMS sensor tool kit……..........…….T/N AKS062006
TPMS sensor tool………………......T/N AKS0620061
TPMS sensor AC adapter…............T/N AKS0620062
10-pack rechargeable batteries….T/N AKS0620063
Battery charger………………….......T/N AKS0620064
USB cable……………………….…..T/N AKS0620065
The TPMS sensor tool is a wireless tool that is used with the HDS (Honda Diagnostic System) for troubleshooting (sensor position check) and for replacing TPMS sensors or the control unit (sensor ID learning).
- Always make sure that the TPMS tool is set to low power unless otherwise instructed.
- Make sure that there are no vehicles or other wheels equipped with TPMS sensors within 10 feet of the vehicle you are servicing.
- Make sure that the batteries are in good condition and are secure in the case.
- Turn on the TPMS sensor tool by following HDS instructions. There are two different wavelengths used, and there are two ways to turn on the TPMS sensor tool. If the TPMS sensor tool is not turned on correctly, you won’t be able to troubleshoot the vehicle or perform the sensor ID learning procedure.
- Turn off the TPMS tool by pressing and holding the small button at the left until the green light in the button turns off. The tool will also turn off automatically after five minutes of inactivity.
AC adapters for the TPMS sensor tool
Two AC adapters are included in the TPMS sensor tool kit. The 90-degree AC adapter is for the battery charger. Use the straight AC adapter to power the TPMS sensor tool when charged batteries are not available. NOTE: The AC adapter does not charge the batteries in the TPMS sensor tool. Also, be sure to remove the batteries from the tool when using the AC adapter.
Using the battery charger
There are two ways to charge the batteries. The method to use depends on the batteries’ state of charge. For brand new or fully discharged batteries:
- Connect the AC adapter to the charger (using the 90-degree AC adapter).
- Insert the batteries into the charger, noting polarity (direction) of the batteries.
- Plug the charger into a power outlet. The LEDs turn red and quick charging begins.
(NOTE: If the LEDs do not illuminate, check that the batteries are properly installed. If the LEDs still do not illuminate, replace the batteries. If you press the red button while the batteries are charging, the battery discharge mode begins. Press the red button again within 30 seconds to switch the charger back to its quick charge mode. When the LEDs turn green, the batteries are charged, and the charger automatically switches to trickle charge mode. Remove the batteries from the charger when the charger is not plugged in).
For charging batteries when you don’t know the state of charge,
1. Connect the AC adapter to the charger using the 90-degree adapter.
2. Insert the batteries into the charger, noting battery position.
3. Plug the charger into a power outlet.
4. Press the red button once to start the discharge mode. The LEDs will blink red.
(NOTE: If the LEDs do not turn on, check battery positions. If the LEDs still do not turn on, replace the batteries. If you press the red button a second time within 30 seconds, the battery quick charge mode begins. Once the batteries are fully discharged, the LEDs turn solid red, and the battery quick charge mode begins automatically. When the LEDs turn green, the batteries are charged and the charger automatically switches to the trickle charge mode).
SENSOR POSITON CHECK
When the TPMS sets a DTC, it refers to Tire 1, Tire 2, Tire 3 or Tire 4. In the service manual, the tire number is the sensor number. For example, Tire 2 is sensor 2.
DTC Detection Item
21-1 Sensor 1 abnormally high tire sensor temperature
22-1 Sensor 2 abnormally high tire sensor temperature
23-1 Sensor 3 abnormally high tire sensor temperature
24-1 Sensor 4 abnormally high tire sensor temperature
However, the tire number is not the tire position. To diagnose or repair, perform the sensor position check to find the location of the problem tire or sensor on the vehicle.
1. Turn the ignition switch on.
2. Connect the HDS to the vehicle.
3. On the HDS main screen, select the HDS icon.
4. On the HDS version screen, select the cars icon.
5. The VIN information appears automatically, but you must enter the mileage and select the Enter button.
6. In the Select Mode menu, select Honda Systems, then select the Enter button.
7. In the System Selection menu, select TPMS, then select the Enter button.
8. In the mode menu, select Functional Tests, then select the Enter button.
9. In the Functional test menu, select Sensor Position Check and select Enter.
10. On the Sensor Position Check screen, turn on the TPMS sensor tool by following the on-screen instructions. Note: Each model is different. Turning on the TPMS sensor tool incorrectly could lead to incorrect diagnosis and repair. Once the TPMS sensor tool is turned on, select the YES button.
11. Follow the instructions on the Sensor Position Check screen. When prompted, go to the left front wheel and then select Enter.
12. Wait about five seconds. The Sensor Position Check screen changes to an operation progress bar. NOTE: Wait for the timer to start. When the blue bar appears, use the TPMS sensor tool. If the sensor IDs appear without the TPMS sensor tool button being pushed, a TPMS sensor is transmitting. Select the Exit button, wait five minutes for the sensor to go to sleep, then follow the on-screen prompts.
13. Point and hold the TPMS sensor tool 10 to 20 inches from the left front wheel valve stem. Press and hold the large transmit button for up to one minute. The button should flash red. The TPMS sensor tool sends a signal to the TPMS sensor to turn on and broadcast the TPMS sensor ID to the TPMS control unit.
14. Watch for the TPMS sensor IDs to appear on the HDS screen. The TPMS control unit must read the sensor ID five times to complete the learning procedure.
15. The TPMS sensor ID learning changes to a different screen once the procedure is complete. Select the Enter button. NOTE: If the sensor does not respond (no sensor IDs are displayed), rotate the tire one-quarter turn and try again. If the TPMS sensor does not respond after one full rotation of the tire, switch the tire to a known-good location and try again. If the TPMS sensor still does not respond after one full rotation of the tire, replace the TPMS sensor.
For further details, refer to Honda Service Bulletin 06-072 on the Identifix Web site