B-MAX 2012 – Tire Pressure Monitoring System (TPMS) – Tire Pressure Monitoring System (TPMS) – Overview – Description and Operation

Overview

The null (body control module) monitors the tire pressure in the 4 road tires with tire pressure sensors that communicate the tire pressure status via radio signals to the null. The tire pressure sensors are battery operated and mounted to the valve stems. All of the controlling software for the null (tire pressure monitoring system) is contained in the null. The null (instrument panel cluster) illuminates the null warning indicator and the message center displays a message when a fault is present or when the tire pressure falls below the low pressure limit.

NOTE: After changing the wheels, the sensors must be re-learned.

NOTE: The system learns automaticly the sensors between nine to twelve minutes while driving.

null Sensor

General

Ford of Europe uses two different designs of null sensor:

• null valve mounted snap-in sensors
• null valve mounted bolt-on sensors

null Valve Mounted Snap-In Sensor

This two piece snap-in valve mounted sensor contains two separate parts (sensor and valve stem) which are screwed together but only the valve stem can be replaced separately.

The sensor is referred to as “snap-in” because it has a traditional rubber valve stem and not a hex nut fastener.

The sensor is mounted to the valve by using a Torx screw. When the valve needs to be replaced the sensor can be removed and a new valve kit can be in installed. The valve kit consists of a new valve, valve cap and Torx screw.

null Valve Mounted Bolt-On Sensors

The valve mounted bolt-on TPMS sensor is an assembly where the sensor and valve stem are screwed together. The sensor is secured by a hex nut and uses a rubber grommet to prevent any leaks.

The bolt-on system uses a grommet to seal the sensor in the rim and an additional retention nut. When the sensor is removed or a tire is replaced a new mounting kit must be installed. The mounting kit includes a new grommet, valve core, valve cap and hex nut.

null Sensor Identification

null type valves have a different design compared to standard type valves. The identification is possible without removing the tire.

null Valve Mounted Snap-In Sensor

 

Item

Description

null Valve Mounted Bolt-On Sensors

 

Item

Description

1

Metal valve stem and nut, metal cap