GF54.50-P-4102GQ Electronic Compass Component Description

GF54.50-P-4102GQ Electronic Compass Component Description
- MODEL 164.1
- with CODE (523) MB Audio 20 radio
- with CODE (245) Electronic compass
as of Model Year 09 /YoM 08 model refinement package

- MODEL 164.1
- with CODE (510) Audio 20 with CD changer
- with CODE (245) Electronic compass
as of Model Year 09 /YoM 08 model refinement package

- MODEL 164.1
- with CODE (525) MB Audio 50 APS radio
- with CODE (245) Electronic compass
as of Model Year 09 /YoM 08 model refinement package

- MODEL 164.1
- with CODE (511) Audio 50 APS with DVD changer
- with CODE (245) Electronic compass
as of Model Year 09 /YoM 08 model refinement package

- MODEL 164.8
- with CODE (523) MB Audio 20 radio
- with CODE (245) Electronic compass
as of Model Year 09 /YoM 08

- MODEL 164.8
- with CODE (510) Audio 20 with CD changer
- with CODE (245) Electronic compass
as of Model Year 09 /YoM 08

- MODEL 164.8
- with CODE (525) MB Audio 50 APS radio
- with CODE (245) Electronic compass
as of Model Year 09 /YoM 08

- MODEL 164.8
- with CODE (511) Audio 50 APS with DVD changer
- with CODE (245) Electronic compass
as of Model Year 09 /YoM 08

- MODEL 251.0
- with CODE (523) MB Audio 20 radio
- with CODE (245) Electronic compass
as of Model Year 09 /YoM 08

- MODEL 251.0
- with CODE (510) Audio 20 with CD changer
- with CODE (245) Electronic compass
as of Model Year 09 /YoM 08

- MODEL 251.0
- with CODE (525) MB Audio 50 APS radio
- with CODE (245) Electronic compass
as of Model Year 09 /YoM 08

- MODEL 251.0
- with CODE (511) Audio 50 APS with DVD changer
- with CODE (245) Electronic compass
as of Model Year 09 /YoM 08

- MODEL 251.1
- with CODE (523) MB Audio 20 radio
- with CODE (245) Electronic compass
as of Model Year 09 /YoM 08

- MODEL 251.1
- with CODE (510) Audio 20 with CD changer
- with CODE (245) Electronic compass
as of Model Year 09 /YoM 08

- MODEL 251.1
- with CODE (525) MB Audio 50 APS radio
- with CODE (245) Electronic compass
as of Model Year 09 /YoM 08

- MODEL 251.1
- with CODE (511) Audio 50 APS with DVD changer
- with CODE (245) Electronic compass
as of Model Year 09 /YoM 08

Illustrated on model 251






1 Instrument cluster bracket
A1 Instrument cluster
B26 Electronic compass

Location
On model 164 and model 251, the electronic compass is located behind the instrument cluster bracket.

Task
- Self-test
- Receiving signals
- Measurement of earth's magnetic field
- Transmitting signals

Self-test
After the status "circuit 15R ON" has been activated, the electronic compass performs a self-test.

Receiving signals
Discrete lines
- Power supply via circuit 30 and circuit 31g over one discrete line each

Measurement of earth's magnetic field
The electronic compass measures the direction of the near-earth magnetic field and can then determine the current direction of travel.

When doing so, the electronic compass carries out automatic compensation of disturbance magnetic fields, e.g. caused by the seat heaters (SIH), with code (873) Left and right front seat heater.

Transmitting signals
Controller Area Network (data bus/CAN bus) (CAN)
The electronic compass is the subscriber of the interior CAN. The electronic compass sends the direction information cyclically (every t = 1 s) to the instrument cluster via the interior CAN.

Design
- Magnetic field sensor for measuring orientation of near-earth magnetic field
- EPROM memory for continual storage of available calibration data and settings