Component description for tire pressure monitor control unit - GF40.15-P-5124FQ
MODEL 218 up to model year 2014 with CODE 475 (Tire pressure monitor (premium))
Schrader
Illustrated on model 218.3
Location
The tire pressure monitor control unit is located on the underfloor above the rear axle.
Task
The tire pressure monitoring system control unit has the following tasks:
- Reading in of sensors and signals
- Evaluation of input factors
- Transfer of information
Reading in of sensors and signals
The input factors are read in via the following connections:
- Two-way radio
- Chassis CAN (CAN E)
Two-way radio
The following sensors are read in via radio:
- Left front tire pressure sensor (A69/1)
- Right front tire pressure sensor (A69/2)
- Left rear tire pressure sensor (A69/3)
- Right rear tire pressure sensor (A69/4)
Chassis CAN
The following signals are received by the instrument cluster (A1):
- Vehicle speed signal
- outside temperature
- Mileage
Evaluation of input factors
The input factors that have been read in are evaluated by the integrated microprocessor whereupon the information is then sent.
Transfer of information
The tire pressure monitor control unit sends information over the chassis CAN to the instrument cluster, this information is then shown as menu displays and as warning messages.
Body
The central antenna is integrated in the tire pressure monitor control unit.
| Technical data Designation |
Unit | Values | Tolerance range | Remarks |
|---|---|---|---|---|
| Tire pressure monitor control unit | ||||
| Voltage supply | V | 12 - 14 | - | |
| Voltage limits | V | 6.5 | ±0.5 | Lower limit value |
| 17.0 | ±0.5 | Upper limit value | ||
| Power consumption | mA | 50 | Standby | |
| 50 | Action | |||
| μA | 60 | No-load current (typical) | ||
| 100 | No-load current (max) | |||
| Reverse polarity protection | - | - | - | Yes |
| Additional specific parameters | - | - | - | No |
| Special features | - | - | - | None |
| Flash capability/coding capability | - | - | - | Yes/yes |
| Left front tire pressure sensor, right front tire pressure sensor, left rear tire pressure sensor, right rear tire pressure sensor | ||||
| Voltage supply | V | 3 | Over the battery sensor | |
| Pressure measuring range | bar | 0 - 6, 375 | ||
| Measurement tolerance range | % | ±5 | At -40 °C up to -10 °C; at 70 °C up to 100 °C | |
| ±2 | At -10 °C up to 70 °C | |||
| Temperature tolerance range | °C | ±5 | At -40 °C up to -10 °C; at 70 °C up to 100 °C | |
| ±2 | At -10 °C up to 70 °C | |||
| Operating temperature range | °C | -40 - 100 | Maximum 120 °C briefly possible | |
| Transmission frequency | MHz | 433, 92 |
| Wiring diagram for tire pressure monitor control unit | PE40.15-P-2101-97XAA |