Tire Pressure Module: Description and Operation

DESCRIPTION - LOW TIRE PRESSURE WARNING MODULE







The low tire pressure warning system utilizes a low tire pressure warning module to control the low tire pressure warning system. The module is located under the instrument panel top cover to the left of the instrument cluster.

OPERATION - LOW TIRE PRESSURE WARNING MODULE
The low tire pressure warning module has a microprocessor controller that can monitor the transmissions from the sensor/transmitters anytime the ignition is on. It can store the last 32 transmissions. There are three important values included in these transmissions. They are:
- Why the transmission was sent,
- From which sensor it came (LF, RF, LR, RR), and
- Pressure

The module compares the transmitted tire pressure to the two pressure thresholds (low pressure or critical pressure). If the module determines that the tire pressure transmitted is below the low or critical pressure thresholds, it will signal for the "Low Tire" pressure warning lamp to come on.

The low tire pressure warning module performs diagnostic routines, stores diagnostic trouble codes and provides the appropriate lamp status to the Body Control Module (BCM). When the module determines there is a fault, the low tire pressure warning lamp circuit is grounded and the BCM turns on the "Low Tire" pressure warning lamp.

The low tire pressure warning module also stores its own identification number, each of the four sensor/transmitter identification numbers, module version and the date of manufacture.