Honda Accord 2008 Manual page 2693

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07/11/02 10:06:24 61TA0000_230_0249

Electrical Compass

System Description

The electrical compass shows the azimuth information in the 8-directions (N, NE, E, SE, S, SW, W, NW) to the audio-

HVAC display unit via the audio unit.

An ignition switch is made into position of ON (II), in oder for the electrical compass unit to communicate with the

audio unit and to do a self-test.

The self-test function checks for the voltage, non-volatile memory (NVM), and ROM status in the electrical compass

unit. If the self-test detects a failure.

The electrical compass unit has a self-calibration function. It detects and compensates for magnetic anomalies caused

by bridges, subways and large steel structures. When the vehicle leaves an area with strong magnetic interference

field (2400 mG or more), the electrical compass unit automatically begins calibrating. If needed, you can calibrate the

compass (see page 23-251).

Zone selection is required to compensate for the difference between magnetic North and geographic North. This

deviation is referred to as declination, the compass compensates for declination when you select the zone where the

vehicle is located (see page 23-251).

System Diagram

ＴＡ０８ＡＮ０Ｊ２６３２４２０００００ＣＡＡＴ００

AUDIO-HVAC DISPLAY UNIT

COMPASS DISPLAY

Chapters

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