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Home >> Isuzu >> 2007 >> i-290 LS, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 9 (Instrument Panel System Displays And Gauges) >> Description and Operation >> Compass Calibration and Magnetic Variance >> Compass Magnetic Variation Adjustment

Compass Magnetic Variation Adjustment

WARNING: This page is about a different car, the 2007 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.

Magnetic variation adjustments are required when the compass displays a constant error in heading. Variation is the difference between magnetic north and true north due to geographical location.

    Fig 1: World Magnetic Variation Map
    GM384280Courtesy of GENERAL MOTORS CORP.
    Fig 2: Illustrating Magnetic Variation Zones
    GM9020Courtesy of GENERAL MOTORS CORP.
  1. Locate your geographic location. Refer to the variation zone map.
  2. Turn ON the ignition with the engine OFF.
  3. Press and hold the switch for the compass, which may be depicted as COMP, COMPASS, or on/off depending on the type of mirror on the vehicle, until a zone number appears on the compass display.
  4. Depress the switch for the compass to select the desired zone number.
  5. Wait 5 seconds. The display will return to a compass heading. The variance procedure is now complete.
  6. Calibrate the compass. Refer to Compass Calibration mentioned above.
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