Resetting & Learning TPMS Sensors
Special procedure for Nissan included
This article will present the reset procedures required by some manufacturers to learn the position of the sensors on the vehicle. On some import vehicles it is as simple as just starting the vehicle “no reset procedure required” whereas others are much more complicated, requiring procedures such as, cycling ignition keys, or, using headlights and door lock switches to put vehicles into learn modes.
When a vehicle is in a learn mode a magnet, a tire pressure release, or a special frequency activating tool may be used to “wake up the sensors” so they can transmit their own unique ID to the controller. This is what is learned on the reset. A vehicle that does not have a proper reset, or if the controller does not know the actual position of the wheels, it may ID a low pressure tire warning on the wrong wheel. This can cause a frustrated customer or additional cost to the shop owner. The best way to find out if the vehicle has a reset procedure is to look in the owners manual for the particular vehicle. These usually offer a very detailed description of the procedure, or refer the reader to online reset procedures offered by companies such as Bartec with the purchase of their TPMS reset kit . . . www.bartecusa.com. Technicians must also be aware that resets learn the position of the wheels with existing sensors but in certain circumstances when a sensor needs to be replaced the sensor may need to be learned. This learn procedure may be the same procedure as the reset procedure, but, in some cases, special factory tools will be needed.
Manufacturers such as Honda, Toyota, Mazda and Nissan require that a factory level tool which can lead a vehicle back to the OE be used. Below is the “work around” for the Nissan vehicles. Special thanks to OBD3 Solutions for providing this procedure. Many technicians will experience problems while performing a TPMS reset procedure or learning a new sensor, on some NISSAN and INFINITI vehicles this is when the use of a Consult II monitor is called for. Here is a procedure than can most certainly be useful:
Start by checking if the vehicle is equipped with a TPMS connector (1 wire connection / white connector) linked to the OBDII electric wiring underneath the dashboard (figure 1, left - note that the following example applies to a 2006 MURANO).
- Use a jumper to link the TPMS connector to ground (figure 2).
- Momentarily disconnect and plug back in the TPMS connector (5 to 6 times)
- The TMPS warning light will blink when the system starts initiating.
- Start the reset procedure with the left-front tire, then the right-front tire, then the right-rear tire, and end with the left-rear tire
- Once the system has completed the reset procedure, the TPMS warning light on the dashboard will automatically stop flashing
DATS Training provides in shop or group training on TPMS service including many other courses. If you are interested in TPMS training, the system itself or diagnostic training, contact us at www.datstraining.com or call us directly (902) 252-9996. All jobbers are welcome.